(19)
(11) EP 0 278 199 A2

(12) EUROPEAN PATENT APPLICATION

(43) Date of publication:
17.08.1988 Bulletin 1988/33

(21) Application number: 87500038.2

(22) Date of filing: 17.06.1987
(51) International Patent Classification (IPC)4E05F 15/16, E05F 11/50
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 19.06.1986 ES 294919 U
28.08.1986 ES 8601446

(60) Divisional application:
92108208.7 / 0501530

(71) Applicant: DISPOSITIVOS DE ACCESORIOS DE PUERTAS, S.A.
E-09007 Burgos (ES)

(72) Inventor:
  • Romero Magarino, D. Antonio
    E-09006 Burgos (ES)

(74) Representative: Urteaga Simarro, José Antonio 
Principe de Vergara, 31
28001 Madrid
28001 Madrid (ES)


(56) References cited: : 
   
     
    Remarks:
    A request for correction by deletion of the originally filed claim 16 has been filed pursuant to Rule 88 EPC. A decision on the request will be taken during the proceedings before the Examining Division (Guidelines for Examination in the EPO, A-V, 2.2).
     


    (54) Improvements in vehicle window drive systems


    (57) Improvements in vehicle window systems with a motor cover with a semireducer support forming one single part, this single part is in form of circular segments with three drill holes. There is a crown wheel connected to the drive unit with a inner circular ring of which an angular dragging sector stands out. This circular ring has two lateral grooves connected to hallow cylindrical bodies, male and female.




    Description


    [0001] In the Technical world, motorized reducers are known that are made up of an independent motor, which by means, for example, of an elastic coupling, powers a reducer, that means it is necessary to have one housing for the motor and another for the reducer, all of which used to mean that double units had to be manufactured as a consequence of this, with different moulds for the housing and also different assembly tooling, with the peculiarity that to be able to used the motor-reducer in applications with the power outlet on one or the other side, it was necessary for the reducer housing to be symmetrical parts.

    [0002] As opposed to these traditional techniques, the patent provides a small reducer that is made up of one single block or unit which can be used in any position, and in which the motor and the worm screw have a single support to be able to receive the crown with the mechanism to drive the cable drum or pinion which operates another mechanism, for example the window drive system of a vehicle, which are sometimes operated by a pinion and on other occasions by means of a cable drum. The single unit of the patent is symmetrical, so that it can be used equally for one position or side or for the other.

    [0003] Another advantageous particularity is the special shape of the support that serves as the front housing for the motor, which has a single drill hole for fixing, situated in a protruding part below the hollow of the worm screw and symmetrical with respect to the medium plane of the part, which allows the unit assembly plate to be fitted symmetrically to it, that is, on one side or the other of the side of the motor, as demanded by its situation in the door of the vehicle.

    [0004] Apart from the above reasons, the inventive idea has been motivated by the more and more pressing need to provide motor vehicles with electrically powered window winding devices of low weight and small size, and in their turn capable of powering any system, whether it be by cable-rack or by an arm with a toothed section.

    [0005] On the other hand, it is interesting for the atarting or blocking of a determined torque to be carried out progressively so that the transmitter element and motor do not suffer when turning either clockwise or anticloclwise during their operation

    [0006] In the conventional mechanisms known for this purpose, spiral compression springs, or elastic items made of natural or synthetic rubber are normally used to regulate the circular damping. With these, the angle in which the damping was carried out was centred on values of little importance, and in which the smoothness required in the starting of the elements was not produced.

    [0007] This patent also deals with an elastic torque transmitter that turns in both directions, which has a very smooth starting together with a high torque damping in the presence of any blocking in the transmission system and without any axial effects being produced on the turning shaft.

    [0008] Another aim of the patent is that of providing an extensive range of torques to transmit between high-power trnamissions to micromechanisms.

    [0009] These and other advantages, which will be pointed out in this specification, make the object of the patent a unit which is both technically complete and simple, as will becobserved.

    [0010] The assembly of the small-sized reducer is made up of a low-power micromotor, which includes the support for the reducer, and whose power intake is placed directly above the worm acrew, which is cut or laminated on the rotor shaft itself, thus allowing the total length of the assembly to be reduced.

    [0011] The shaft in cuestion has only two sperical supports at its ends, with these preferably being of sintered, self-lubricated material. There are some lenticular, coaxial supports responsible for supporting the play and loads of axial thrust, by means of plastic material with high resistance to wear and temperature and a low friction coefficient, which are obviously placed in an adjacent position as regards the said spherical supports.

    [0012] There is a motor cover-support part int he shape of a circular segment, whose centre coincides with the shaft of the crown, which has three equally spaced drill holes, in which the worm screw shows the profile of its helix through a portion of the said motor cover-support part.

    [0013] The crown support can therefore be adapted to this part and fixed in the drill holes by means of suitable bolts or rivets

    [0014] On the other hand, the said cover-support receives, at the end farthest away from the sperical support of the worm screw rotor shaft, and near the motor itself it houses a retainer that is coaxial with the shaft, so that it ensures the oiltightness, watertightness, etc. of the motor, with the help of an elastic joint in the flanging area of the cover-support with the motor housing.

    [0015] The motor-reducer assembly is fitted to the door of the vehicle by means of an assembly plate, which is a die-cut part of sheet metal, of suitable thickness, which at one end receives, through an opening carried out on a right angle fold, the body of the motor and at the other end takes the shape of a "A"-shaped leg, which with its corresponding drill hole is fixed to the drill hole in the protruding part of the motor support by means of a rivet or bolt. This system allows a metallic surface to be left available to back up laterally to the motor, of the shape and dimensions required for bolts or nuts to be fixed to it by welding, so that they coincide with the drill holes determined by the constructor of the vehicle in the door, so that the centre of gravity of the motor-reducer assembly is contained between them; this condition is of great importance so that the dynamic stresses that the mass of this assembly produces when the door is being closed does not cause the tearing away of the sheet metal which is so common.

    [0016] As a deduction of what has been said, it is important to point out the very small dimensions of the assembly, as the body cover of the semireducer motor can be as narrow as the motor itself, and also completely symmetrical with respect to the average axial plane of the assembly, thus being able to admit the support housing of the crown indistinctly at one side or the other, according to convenience.

    [0017] The transmitter is based on a simple mechanism able to transmit a determined torque in terms of the initial tension of a special, spiral spring, which is previously calculated in relation to the torque to be developed while in operation. It is also possible for the transmitter to absorb an increase in the said operating torque, due to either brusque starting or an obstacle that means an impediment for the turning of the assembly, becoming an indispensable item as a damping element.

    [0018] The invention is mainly centred, and it is made up of a crown, for example a coupling flange to the drive unit, a sheave or toothed pulley, a crown wheel or sprocket ... etc., with the hollow interior of this crown wheel having an integral circular ring which juts out into this interior part, this ring being provided with a dragging sector of a variable angular value, which extends a certain amount towards the centre of the crown. for patent clarification, the variable angular value of the crown sector will be called (a).

    [0019] Two shoes in the form of a circular sector are supported by their outer surface in the circular ring of the crown wheel and supported by one of their ends on the sides of the dragging sector. The two shoes do not take up the whole of the circular ring, so that their opposite ends which are not supported on the circular sector, are situated at a certain distance from each other.

    [0020] A circular spring is housed in the interior of the shoes, with the ends of the projection being lodged in recesses in their interior. The spring has a natural tendency to operate on the shoes, so that the shoes rest on the dragging sector and the other ends of shoes become situated at an angular distance due to the action of the circular spring; a distance that will be called (b).

    [0021] The above-mentioned crown wheel has grooves on both sides of the circular ring and dragging sector, in which two interconnected circular bodies are housed, in such a way that the crown turns freely between the said similar bodies, as the three elements are positioned according to a same, single shaft, so that each one of the circular bodies fits into the corresponding groove of the crown at both sides of the circular ring.

    [0022] The circular bodies are provided in their turn with grooves carried out in opposite directions, with relation to each other, so that they become face to face when they are housed in the grooves of the crown wheel, forming and internal hollow which holds the circular ring, the circular spring and the two shoes. Both grooves of the cylindrical bodies are also provided with rectangularly-shaped projections whose base is identical to the dragging sector of the crown wheel where the shoes rest.

    [0023] Apart from this, the two circular bodies are related to each other, as was mentioned earlier. One of the circular bodies has a hollow axial projection in which the circular spring is supported and which culminates in a truncated cone portion that is partially slotted in an axial direction along all its circular contour.

    [0024] The other cylindrical body extends, also axially, into a neck that receives the projecting part of the other body, with a wall that meets the front of the other body and a circular housing that receives the truncated cone portion of it, so that like this both circular bodies become joined together solidly.

    [0025] The circular spring that was mentioned earlier can be formed of one or several spirals of steel wire, with its ends directed towards the outer part of the spiral and loops in an axial direction and towards the interior, so that its stress is carried out in the perpendicular turning plane, without any axial stress being established. However, they could also be radially placed towards the exterior.

    [0026] By the effect of the initial tension of the spring, the shoes and the dragging sector of the crown wheel are intimately joined, and this initial tension is what determines the initial minimum torque to be transmitted, with an angular separation (b) between the ends of the spring.

    [0027] If we consider the cylindrical bodies to be fixed and we turn the crown wheel in either direction, we submit the two cylindrical bodies to a monimum drag torque which is what corres ponds to the one determined by the spring and, therefore, we can move it with this value, without the angle (b) of the spring being altered.

    [0028] However, if a greater initial torque should be required, for example, in starting, the supplementary energy stored in the spring can be used up to a maximum value in which angle (b) is equal to zero.

    [0029] In these movements, one of the shoes is blocked by the rectangular projections of the two cylindrical parts, while the other slides along the grooves in them, whether the movement is to the right or to the left.

    [0030] Identical effects are produced if during the course of any normal turning movement the transmitter meets an obstacle, which might be, for example, an overload at a stroke end, etc.

    [0031] Obviously, the circular damping is always carried out within the angle (b) of the ends of the spring, and its extent is in terms of the angles (a) covered by the dragging sector of the crown and the angular sector (c) covered by the shoes themselves.

    [0032] In practice, a certainly wide value can be arranged for angle (b), which represents a very considerable value with respect to presently used mechanisms, in which spiral compression springs or elastic elements of natural or synthetic rubber are used.

    [0033] On the other hand, in the mechanism that recommends the invention, the sliding friction of the shoes on the grooves or slots means that the transmission of the circular movement is carried out uniformly and therefore without oscillations.

    [0034] All that has been mentioned up to now, together with other details of the invention, is pointed out in relation with the adjoinging pages of drawings, in which they are represented as follows:

    - Figure 1 is an elevetion of the assembly.

    - Figure 2 is a view from the left of the previous figure, shown in cross section.

    Figure 3 is a view of figure 1 seen from the top.

    - Figure 4 is a base cross section of the torque transmitter of the patent.

    - Figure 5 is a view from the left of figure 4, in which the line marked as XX corresponds to figure 4.

    - Figure 6 is a perspective of the transmitter assembly.

    - Figures 7 to 10 show different applications of the invention to different types of window winding mechanisms.



    [0035] In accordance with figure 1, we can observe the direct current micromotor (1), with the same feed voltage as that used in the vehicle that it is destined for, and with a power intake above the direct worm screw (2) which is cut or laminated on the rotor shaft and turns on two spherical bearings (3) made of suitable sintered material and self-lubricated, with axial supports (4) and (5) made of plastic material with a high resistance to wear and temperature, as they have to resist great alternative axial stresses while, at the same time, their turning friction has to be as low as possible so as to absorb the minimum possible energy, so that practically all the energy of the motor is available at the' worm screw-spindle.

    [0036] On the motor support (6), in the shape of a circular bracket, an oil and damp retaining element is adapted (7), responsible for impeding, if necessary, these elements from passing into the electrical area of the brushes and the rotor collector, where they might be the cause of breakdowns, taking into account that the conditions of dampness and temperature inside the door panel might be very variable at certain moments. This support is preferably made by injection of reinforced fiber glass thermoplastic resin or light metal.

    [0037] The operation of the cable, in the case of window winding devices of this type, is made up of the toothed crown wheel (8), made of thermoplastic resin with a low friction coefficient, which gears on the worm screw-spindle (2) of the motor (1), and which forming part of the coplanary torque transmitter (9), draws over the drum that is integral to this system the two strands of cable (10 and 11) wound onto it and connected among themselves to the plate or unit for moving the pane of glass, as shown in figure 7.

    [0038] The cable system is supported by the two casing elements (14 and 15), made by injection of reinforced fiber glass thermoplastic resin and with a rotation shaft (16) inserted under pressure with its ends on the corresponding supports of the said housing.

    [0039] Of the two casings, it is (15) that houses the cable drum and has the outlets (17) directed in the most suitable position within the angles (a) or (13) included within the extreme positions (B-C) or (D-E), or else among the fixed positions (A) and that which is convenient within the angles mentioned previously.

    [0040] The compensation of the cable, according to whether it works in one direction or the other, is carried out by means of guides (12), made by injection of thermoplastic resin with a low friction coefficient, the cable conductors (26) and the helicoidal springs (13) shown in figure 1, which facilitates its sliding and compensation over the corresponding outlets (17) of the housing (15). Housing (14), which houses the crown wheel (8) and the torque transmitter (9), is connected to housing (15) by the shaft (16) and by the plastic deformation of the sectorial projections (18).

    [0041] Once that all the elements of this unit have been assembled, it is inserted into the bracket support (6) of the motor like a case, so that the crown wheel (8) will gear on the worm screw (2) and will be fastened to it by means of three rivets or bolts (10), thus shaping the compact motor-reducer that is extremely reduced in both size and weight, with the particular advantage that the motor can be exchanged by simply loosening the fixing elements (19) and then replacing them once that the change has been carried out.

    [0042] Housing (14) is a single part due to its geometry, so it can be used on one side or the other of the motor-reducer assembly, which means a considerable saving.

    [0043] This assembly is connected to the door of the vehicle by means of a simple anchoring plate (20), which clamps the motor in its rear part (figures 1 and 2) and is fixed by its front part through the only drill hole that the assembly has in the front support (6) of the motor, by means of a rivet or bolt (21) and its corresponding washer.

    [0044] The anchoring plate (20) is oversized at its support area on the door, so that the centre of gravity of the motor-reducer assembly falls within the box defined by the fixing elements, usually bolts (23). Like this, it is achieved that the dynamic stress that the system exercises on the door being closed, receives the push centrally and no tearing away of the sheet metal is produced in this area, a circumstance that is often produced in conventional systems which are fixed by one end, that of the head of the reducer, and leave the motor overhanging, even though this is precisely the portion of greatest bulk and causes the previously mentioned tearing away, by moving the centre of gravity of the system outside the fixing area foreseen by the manufacturer of the vehicle.

    [0045] When dealing with the operation of window winding systems of the cable-rack type, for example the one shown in figure 8, the system is practically the same, with the only difference that the drum (9) is replaced by a pinion of suitable diameter and pitch in conformity with that of the cable-rack, and the casing (15) will have the appropriate housing and outlets for the said pinion and guide of the conductor pipes corresponding to the cable-rack.

    [0046] In case of operating window winding mechanisms with arm(s) with a toothed sector, as in figures 9 and 10, the drum (9) will be replaced by a pinion which will gear directly with the toothed sector, by which the housing (15) will be reduced to a simple cover, through which only the above-mentioned pinion will appear.

    [0047] Due to the fact that the drill holes for fixing (19) are arranged symmetrically around the axis M-M, a single motor-worm screw unit can be used for applicaton to right or left window winding devices, which means a considerable advantage and saving in its use.

    [0048] As regards figures 4 to 6, the crown wheel (8) can be observed, with, for example, the copling flange for the drive unit, a rim pulley, a toothed crown, etc., which has in its hollow interior a circular nerve or ring (31) which provides a slideway (30), with two grooves (32 and 32') at both sides of the said ring (31).

    [0049] This ring is interrupted by a dragging sector (24) which extends towards the geometrical centre of the crown wheel (8) with an (a) angle of variable value according to needs. In this sector (24), and specifically at its ends, the two shoes (25 and 25') are supported in the form of a circular segment of angular value (c), which on their insides (34) receive the spring (29), whose ends (37 and 3T) are opportunely housed in portions (35) and (36) of the said shoes.

    [0050] The two ends (37 and 37') of the spring (29) are to be found in an axial direction, as is clear, and this is why they are taken in perfectly in the shoes (25 and 25'). The outer surfaces of the shoes will slide opportunely on the slideway (30) once housed with the spring (29) in their interior, and with the ends (37 and 37') of the spring (29) being separated in an angle (c).

    [0051] The grooves (32 and (32') of the crown wheel (8) receive the projections (38) and (38') of the two cylindrical bodies (26) and (26'), as is shown in figure 5. The projection (38) of body (9) has in its interior a slot or groove (28), in which is made a rectangularly shaped projection (27) of angular value equal to that of the sector (24) of the crown wheel (8). The projection (38') of part (9') has in its turn the slot or groove (28'), also provided with the projection (27') angularly coincident with the sector (24) of the crown wheel (8).

    [0052] the two cylindrical bodies (9) and (9') are suitably integrated, thanks to the introduction of the dentated truncated cone projection (39) of the body (9) in the intemal housing of body (9'), and of the projections (26) of body (9) over the slots (33) of body (9'), as male and female, as can be observed.

    [0053] In figure 5 it can be observed how the projecting portion of the crown wheel, defined by the sector (24) and by the slideway (30), closes the gap produced between the two parts (9 and 9') and over the crown wheel (8), in which the crown wheel (8) turns freely between the said cylindrical parts.

    [0054] The shoes are supported on the sector (24) and on the other projections (27 and 2T, of the same angular value as that of the two cylindrical bodies, by the effect of the initial tension of the spring (29), which determines, as has already been stated, the minimum initial torque to be transmitted, leaving the angle (b) between the ends of the spring as is shown in figure 4, in which the shoes are supported on the dragging sector (8) and on the projections (27 and 2T) of the cylindrical parts (9 and 9'), which take in an angle (a).

    [0055] The extent of the damping will depend on this angular value (a) and on the angular value (c) corresponding to the shoes, values which are open to modification in order to vary the characteristics of the assembly keeping the spring (29). the spring (29) can in turn have its characteristics varied in order to obtain additional modifications in regulation.

    [0056] It should also be pointed out in figure 5 that the two grooves (28 and 28') of the cylindrical bodies become situated in a symmetrical fashion with respect to the plane XX shown in the said figure.

    [0057] The two projecting ends (37 and 37') of the spring are housed in two recesses,which are not illustrated, in the positions (35 and 36) respectively of the shoes, in such a way that their fit is perfectly secure.

    [0058] Finally, and with regard to figure 7, we should like to point out that the assembly of the patent has been shown in its two possible positions (44 or 44a), in relation with a base unit (40) that uses cable.

    [0059] In figure 8, the patent (44) is shown with the element (41) that uses cable-rack, and in figures 9 and 10, the patent (44) or (44a) is fitted to devices that use arms (42) or an arm (43).


    Claims

    1.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", which is essentially characterized because the motor cover and the semi-reducer support form one single part, which has its vertical axial shaft in coincidence with that of the motor, with the two forming a single coaxial plane, in that the part in quest has a component in the form of a circular segment with three drill holes to accommodate the support of the crown wheel of the reducer, these drill holes being equidistant, in that the centre of the circular segment coincides with the centre of the crown wheel and in that the power outlet of the crown wheel can be arranged on one side or the other withe respect to the vertical plane of the said circular segment that forms the cover.
     
    2.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the previous claim, characterized because the shaft, whose helix or worm-screw portion appears on the outside of the lower part of the cover, houses a leaktight retainer and an elastic joint with the motor housing, with the cover having one single drill hole for fixing, in the portion immediately below that of the worm-screw and above the shaft perpendicular to it that passes through the turning centre of the crown wheel.
     
    3.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the previous claims, characterized because the anchoring of the assembly to the door of the vehicle is carried out by means of an assembly plate, onto which the rear portion of the motor is inserted and is fixed in its front portion by a single bolt or rivet to the front support of the motor, having the necessary surface for the centre of gravity of the assembly to fall within the area assigned by the constructor for this purpose, thus avoiding the tearing away of sheet metal in the door panel, by "slam effect".
     
    4.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the previous claims, characterized because the transmission of power to the cable drum or draw pinion, according to its application for cable, cable-rack, arm or arms with toothed sector window winding units, is carried out by means of an elastic coplanary torque transmitter mechanism in both directions.
     
    5.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", characterized because there is a crown wheel connected to the drive unit of the transmitter assembly, this crown wheel being hollow on the inside, with an inner circular ring of which an angular dragging sector stands out, directed towards the centre of the crown, of a variable angular value, in which this circular ring has two lateral grooves in which the heads of two hollow cylindrical bodies, male and female, are housed, coaxial with the crown wheel, with the heads of the said bodies having symmetrically opposed grooves over the ring of the crown wheel, of which the rectangular section projections of the same width as the dragging sector of the crown wheel stand out, in that the male cylindrical body has a neck that projects out towards the other body, a neck that finishes in a thick dentated truncated cone, which houses itself inside the other neck of the female body coming butt to butt with an internal face in the form of a circular crown and inserted into the circular hollow adjacent to the said face, in such a way that the crown, the heads of the male and female cylindrical bodies and the projecting neck of the female cylindrical body form between themselves a closed hollow in which two shoes are situated, in the shape of a circular segment of a certain angular value, which has in its interior a circular spring whose projecting ends are taken in the two ends of the shoes and distanced from each other at a certain angle, while the other ends of the shoes are supported on the dragging sector of the crown wheel and on the rectangular projections of the cylindrical bodies, with the possibility that the said shoes can slide along the grooves of the cylindrical bodies and the circular ring of the crown wheel, and in that the circular ring and the dragging sector of the said crown wheel enter and turn freely between the male and female cylindrical bodies.
     
    6.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the fifth claim, characterized because the heads of the cylindrical bodies are symmetrical with respect to a plane perpendicular to the shaft of the assembly that passes through the central area of the circular ring of the crown wheel.
     
    7.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the fifth claim, characterized because the spring, which is preferably made of steel wire, has at least one spiral and its ends are preferably directed towards the outer part of the spiral and loops in an axial direction and towards the interior of the spring itself.
     
    8.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the fifth and seventh claims, characterized because the angular value (b) of separation between the ends of the spring is variable in itself and by altering the angles (a) of the dragging sector and (c) of the shoes.
     
    9.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the fifth and eighth claims, characterized because the dragging sector of the crown wheel and the rectangular projections of the two cylindrical bodies have a variable angular value (a).
     
    10.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in acordance with the fifth and eighth claims, characterized because the angular value (c) of each one of the shoes is variable.
     
    11.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", characterized because the elastic torque is carried out in both turning directions and without axial effects on the turning shaft.
     
    12.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", characterized because for mechanisms that have to transmit low torques and which are small in size, the assembly can be constructed by injection of fiber glass or mineral reinforced thermoplastic resins.
     
    13.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", in accordance with the fifth and seventh claims, characterized because the free ends of the spring are radially positioned towards the exterior from its centre.
     
    14.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", characterized because the housing that forms the covers for the crown wheel and the drum or the crown wheel and cover of the pinion outlet if this is the case, are assembled over the motor element in the form of case and are fixed to it by means of three elements symmetrically positioned with respect to an axis that passes through the turning shaft of the crown wheel, which allows the single worm-screw motor to be used, when the corresponding power intake is carried out to the right or left of the central plane of the motor.
     
    15.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS", characterized because the input and output directions of the cable or cable-rack can be arranged over a very wide angular range, which facilitates its adaptation to any type of door or the positioning of the mechanism inside it.
     
    16a.-"IMPROVEMENTS IN VEHICLE WINDOW DRIVE SYSTEMS"
     




    Drawing