(19)
(11)EP 3 262 298 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
04.11.2020 Bulletin 2020/45

(21)Application number: 16710362.1

(22)Date of filing:  23.02.2016
(51)International Patent Classification (IPC): 
F04B 9/04(2006.01)
F04B 35/04(2006.01)
F04C 18/22(2006.01)
F04B 35/01(2006.01)
B29C 73/16(2006.01)
(86)International application number:
PCT/US2016/019110
(87)International publication number:
WO 2016/137981 (01.09.2016 Gazette  2016/35)

(54)

COMPRESSOR FOR DISCHARGING A MEDIUM

VERDICHTER ZUM AUSTRAGEN EINES MEDIUMS

COMPRESSEUR POUR DÉLIVRER UNE SUBSTANCE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 24.02.2015 DE 102015102625
16.02.2016 DE 102016102654

(43)Date of publication of application:
03.01.2018 Bulletin 2018/01

(73)Proprietor: Illinois Tool Works Inc.
Glenview, IL 60025 (US)

(72)Inventor:
  • SPINDLER, Martin Patrick
    88634 Herdwangen (DE)

(74)Representative: Trinks, Ole 
Meissner Bolte Patentanwälte Rechtsanwälte Partnerschaft mbB Postfach 10 26 05
86016 Augsburg
86016 Augsburg (DE)


(56)References cited: : 
EP-A1- 2 353 848
US-A- 3 232 523
US-A- 5 215 447
US-B1- 6 439 104
GB-A- 1 285 899
US-A- 3 671 153
US-A- 5 259 256
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description


    [0001] The invention relates to a compressor for discharging a medium, in particular tire sealant that is to be discharged from a container into a tire, wherein a motor of the compressor drives a step-up transmission wheel for moving at least one piston in a compression chamber.

    Prior art



    [0002] GB 1 285 899 A relates to pumps, compressors, internal combustion engines and steam engines of the piston and cylinder type. These machines include a piston and a cylinder; a continuous rack arrangement within the piston defining facing toothed racks and curved surfaces connecting the racks; a drive shaft; and a drive element on the drive shaft including teeth engageable with the toothed racks such that rotary motion of the drive shaft imparts reciprocating motion to the piston or reciprocating motion of the piston imparts rotary motion to the drive shaft to effect power transmission between said piston and said drive shaft, and a curved surface permitting rolling of the drive element on the curved connecting surfaces of the continuous rack necting arrangement whereby the teeth of the drive element after disengaging from one toothed rack smoothly engage the other toothed rack.

    [0003] US 6,439,104 B1 relates to a small size air pump in which a motor is driven to actuate a pump section, so as to carry out a predetermined aspirating operation; the air pump comprising a worm gear disposed at an output shaft of the motor; a worm wheel, disposed between the motor and the pump section, meshing with the worm gear; a smaller gear disposed coaxial with the worm wheel; a larger gear, disposed at a position held between the motor and the pump section, meshing with the smaller gear; and an actuator element having one end pivotally connected to a periphery of a flat part of the larger gear and the other end connected to an end part of a piston of the pump section.

    [0004] DE 10 2004 042 911 A1 discloses a device for conveying a gas from a pressure chamber, in particular for discharging a sealant from this container into a tire of a vehicle and for inflating the tire. A compressor can be attached to the sealant container disclosed in said document. This compressor can also be configured as a diaphragm compressor which compresses air present in the sealant container in order to force sealant out of the sealant container.

    [0005] Moreover, WO 2010/066448 discloses a device for conveying a gas from a pressure chamber, in particular for discharging a sealant from this container into a tire of a vehicle and/or for inflating the tire, wherein a piston is arranged to be oscillatingly movable in the pressure chamber. A gear element is also assigned to the piston and converts a rotational movement of the input shaft of a drive into an oscillating movement.

    Problem



    [0006] The problem addressed by the present invention is that of simplifying and improving known compressors for conveying a gas from a pressure chamber and for transporting a medium.

    Solution to the problem



    [0007] The problem is solved by the respective subject-matter of claims 1 and 5, wherein further developments of the inventive compressor are provided in the sub-claims, respectively. In particular, the step-up transmission wheel of the inventive compressor is connected eccentrically to an output wheel and, by way of the latter, to a piston rod, which moves a piston in a compression chamber; wherein the output wheel consists of two wheel halves, each with a toothing, and wherein the toothing of one wheel half extends about one arc distance and the toothing of the other wheel half extends about another arc distance.

    [0008] In one illustrative embodiment of the present invention, the compressor has a motor which is connected eccentrically to a piston rod via an output wheel, which piston rod moves a piston in the compression chamber. According to the invention, provision is made that the step-up transmission wheel is arranged upstream from the output wheel. The step-up transmission wheel and output wheel are adapted to each other such that a different transmission of force can take place depending on which toothings are in engagement. For this purpose, provision is made that the output wheel consists of two wheel halves that lie on each other. Each wheel half has a toothing, but the latter does not extend over the entire circumference, and instead only over a predetermined number of degrees. In the preferred illustrative embodiment, this number of degrees is in each case 180°, although other ratios are also conceivable, for example 270° or 90°. It depends on the desired efficiency of the overall system.

    [0009] By contrast, the step-up transmission wheel consists of two toothed wheels which lie on each other and which interact alternately with one or other wheel half of the output wheel. One toothed wheel has a greater diameter than the other toothed wheel. The toothed wheel with the greater diameter can apply a greater force to the output wheel than can the toothed wheel with the smaller diameter. Therefore, the toothed wheel with the greater diameter engages in the corresponding toothing of the output wheel when air is to be compressed into the compression chamber. By contrast, if air is only to be sucked in, the toothed wheel with the smaller diameter engages in the toothing of the output wheel half assigned to it.

    [0010] In a further illustrative embodiment of the invention, the step-up transmission wheel is provided only partially on its circumference with a toothing. This toothing alternately engages in at least two toothings of a fork element on which at least one piston is provided. The function is such that, with the direction of rotation remaining constant, the step-up transmission wheel engages alternately in the different toothings and thus causes a different movement of the piston.

    [0011] In an embodiment, the piston is connected to a fork element which forms an elongate opening into which the step-up transmission wheel engages. Two opposite side flanks of this fork element enclose this elongate opening more or less elliptically, wherein the side flanks on the inside of the elongate opening are provided with the toothings lying opposite each other. By contrast, the step-up transmission wheel is provided with a toothing over only about half of its circumference. If this step-up transmission wheel now rotates about its axis, the arrangement is configured such that the toothing of the step-up transmission wheel initially runs along an inner toothing of the fork element and, at the end of this toothing, engages with at least one tooth in the opposite toothing. This brings about a movement of the fork element in the opposite direction, as a result of which the piston is moved to and fro in the compression chamber.

    [0012] In a preferred illustrative embodiment, however, the fork element is connected to in each case one piston at both ends. It is also conceivable here that the fork element is also connected to several pistons via a corresponding joint and corresponding piston rods, which pistons move in corresponding compression chambers. This allows a corresponding compressor according to the invention to be arranged in a wheel rim, specifically in a five-hole wheel rim, since the corresponding pistons are then able to move between the holes. This of course also applies to a rim with three or four holes.

    [0013] In these arrangements, a transmission of force and a distribution of the pressure forces to different compression chambers are greatly improved.

    [0014] A further concept of the present invention, and one for which protection is also claimed independently, relates to the fact that the motor is assigned not just one compression chamber but several compression chambers, of which the volume is modifiable. In this way, a much greater volumetric flow toward the tire can be generated than is customary in the conventional compressors. The present invention conceives in particular of two illustrative embodiments, namely, on the one hand,
    • a multi-piston principle, in which the piston shape does not necessarily have to be round, and, on the other hand,
    • a rotary piston principle, which operates according to the Wankel principle.


    [0015] In both cases, the motor used should be of the so-called plate motor design (motor diameter > motor length).

    [0016] The multi-piston principle will in particular involve the use of two pistons which are connected to each other and are actuated jointly by the motor or the shaft of the motor. Of course, this does not exclude the possibility of also being able to use more than two pistons.

    [0017] For example, if two pistons are moved in two compression chambers, these two pistons can be connected to each other. For example, this then involves the mutually opposite end faces of a sliding piston. An eccentrically mounted pin, coupled to the shaft of the motor, then engages in this sliding piston and, during the rotation of the shaft of the motor, runs in an oblong hole in the sliding piston and thus effects a linear movement of the sliding piston. Both compression chambers are connected to the intake line to the sealant container or directly to the tire.

    [0018] In the rotary piston principle (Wankel principle), a non-round piston is mounted on the motor output shaft. This non-round piston rotates in a compartment and divides this compartment into several compression chambers, wherein the compartment is also assigned suction openings and ejection openings for air, depending on the number of the compression chambers. Edges of the non-round piston run along an inner wall of the compartment and are supported relative to the latter by double seals.

    Description of the figures



    [0019] Further advantages, features and details of the invention will become clear from the following description of preferred illustrative embodiments and from the drawing, in which

    Figure 1 shows a perspective view of a compressor according to the invention;

    Figure 2 shows a plan view of the compressor according to Figure 1;

    Figure 3 shows a partial view of the compressor according to Figure 2 seen in direction X;

    Figure 4 shows a perspective view of the interaction between a step-up transmission wheel and an output wheel;

    Figures 5-8 show schematic plan views of a further illustrative embodiment of part of a compressor according to the invention in different positions of use;

    Figures 9 and 10 show schematic plan views of two further illustrative embodiments of parts of a compressor according to the invention;

    Figure 11 shows a perspective view of a further illustrative embodiment of a compressor according to the invention;

    Figure 12 shows a plan view of a further illustrative embodiment of a compressor according to the invention.



    [0020] According to Figure 1, a compressor P according to the invention has a motor 1, which is cooled by a fan 2. A step-up transmission wheel 3, which sits on a motor shaft (not shown), interacts with an output wheel 4.

    [0021] The output wheel 4 is connected eccentrically to a piston rod 5, which moves a piston 6 (Figure 3) in a compression chamber 7. A valve piece 8, which has a line 9 to a tire, for example, and has a connection 10 to a container for tire sealant, for example, is attached to this compression chamber 7.

    [0022] This compressor functions as follows:
    The step-up transmission wheel 3 is moved in rotation via the motor 1 and transmits its rotational movement to the output wheel 4. The latter in turn moves the piston rod 5 in the compression chamber 7. In this way, air is forced out of the compression chamber 7 into the valve piece 8 and into the line 9. A medium, in particular tire sealant, is then either sucked in from a container (not shown) via the connection 10 or is additionally forced into the line 9 and thus introduced, for example, into a tire that is to be sealed.

    [0023] The present invention relates in part to an improvement of the force transmission of the force of the motor 1 to the piston rod 5 or the piston 6. It is known that more force is needed when compressing the air in the compression chamber 7 than when sucking new air into the compression chamber. To take account of this force relationship, both the step-up transmission wheel 3 and also the output wheel 4 are preferably formed in two parts. According to Figure 4, the step-up transmission wheel 3 consists of two toothed wheels 11 and 12 which lie on each other and which have a congruent opening 13 for receiving a motor shaft. Moreover, the toothed wheel 11 also has a greater diameter than the toothed wheel 12.

    [0024] The output wheel 4 consists of two halves 4.1 and 4.2. Each half is provided with a toothing 14.1 and 14.2, respectively. Each toothing 14.1 and 14.2 extends over only a half circumference of the respective output wheel half 4.1, 4.2, while the other half is free of toothing. Here too, provision is made that the output wheel half 4.2 with the toothing 14.2 has a greater diameter than the output wheel half 4.1 with the toothing 14.1. The toothed wheel 12 with the smaller diameter interacts with the output wheel half 4.2 with the greater diameter, while the toothed wheel 11 with the greater diameter interacts with the output wheel half 4.1 with the smaller diameter. As soon as the toothed wheel 11 with the greater diameter comes into engagement with the toothing 14.1 of the output wheel half 4.1, a greater force can thus be applied by the step-up transmission ratio, such that this state of engagement is preferred when a greater force is intended to act on the piston 6 during the compression. When the piston 6 retreats in order for new air to be sucked into the compression chamber 7, the toothed wheel 12 with the smaller diameter is then in engagement with the toothing 14.2 of the output wheel 4.2 with the smaller diameter.

    [0025] Figures 5 to 8 show a further illustrative embodiment of a possible actuation of two pistons 6.1 and 6.2 in two compression chambers (not shown). The two pistons 6.1 and 6.2 are connected to each other via a fork element 15. For this purpose, the fork element 15 has two curved side flanks 16.1 and 16.2 which connect two connector stubs 17.1 and 17.2 on the pistons 6.1 and 6.2 to each other. The side flanks 16.1 and 16.2 enclose an elongate opening 18, and, within the interior of this elongate opening 18, parts of the side flanks 16.1 and 16.2 extending approximately parallel to each other are provided with a toothing 19.1 and 19.2, respectively.

    [0026] A step-up transmission wheel 3.1, approximately half of which is provided with a further toothing 20, engages in this elongate opening 18.

    [0027] This illustrative embodiment of a gear according to the invention, in particular for compressors, functions as follows:
    The step-up transmission wheel 3.1, which sits on a shaft of a drive, rotates about its axis A. In doing so, the toothing 20 of the step-up transmission wheel 3.1 runs along the inner toothing 19.1 of the side flank 16.1, such that the fork element 15 moves downward according to the arrow 21 when the step-up transmission wheel 3.1 is fixed in position. During this, the piston 6.2 moves deeper into its compression chamber and forces the fluid or gas contained therein out of this compression chamber. At the same time, the piston 6.2 moves out from its associated compression chamber and sucks in fluid or gas.

    [0028] Figure 6 shows the step-up transmission wheel 3.1 running along the toothing 19.1, the step-up transmission wheel 3.1 here being located approximately at the middle of the elongate opening 18.

    [0029] According to Figure 7, an uppermost tooth 22 of the toothing 20 of the step-up transmission wheel 3.1 has now reached an uppermost tooth 23 of the toothing 19.1. At the same time, an opposite tooth 24 engages under an uppermost tooth 25 of the opposite toothing 19.2. Upon further rotation of the step-up transmission wheel 3.1, the toothing 20 engaging in the toothing 19.2 carries the fork element 15.1 in the opposite direction, as is shown by the arrow 26. Figure 8 shows the corresponding central position of the step-up transmission wheel 3.1 in the elongate opening 18.

    [0030] Finally, the tooth 24 of the toothing 20 of the step-up transmission wheel 3.1 reaches a lower tooth 27 of the toothing 19.1 and the position of use shown in Figure 5, wherein the opposite tooth 22 again unlatches from the toothing 19.2. The tooth 24 now comes into engagement with the toothing 19.1, as is shown in Figure 5.

    [0031] Figure 9 shows that the fork element 15 according to the invention can also interact with three pistons. For this purpose, instead of the piston 6.2, two piston rods 5.1 and 5.2 are connected to the fork element 15 via a joint 28. A piston 6.3, 6.4 is provided at the other end of the piston rods 5.1, 5.2, respectively.

    [0032] In Figure 10, the fork element 15 actuates two mutually opposite pairs of pistons 6.3, 6.4 and 6.5, 6.6, wherein the pair 6.5, 6.6 replaces the piston 6.1 and is connected to the fork element 15 via corresponding piston rods 5.3 and 5.4, respectively, and via a joint 28.1.

    [0033] However, the process of movement of the arrangement according to Figure 9 and Figure 10 corresponds to the details concerning the function of the illustrative embodiment according to Figures 5 to 8.

    [0034] A further illustrative embodiment of a compressor P1 according to the invention is shown in Figure 11, in which it will be seen that a motor 1.1 is used which is configured according to the so-called plate motor design. A characteristic of this design is that the motor diameter is greater than the motor length. This means it takes up very little space. Particular preference is given to electronically actuated, brushless motors with a much improved efficiency compared to conventional brush motors, also external rotor motors.

    [0035] An output shaft (not shown in detail) of this motor 1.1 engages with an eccentrically mounted pin 29 in an oblong hole 30 of a sliding piston 31. Since the pin itself also rotates, a rolling movement takes place in the oblong hole 30.

    [0036] Both ends of the sliding piston 31 are designed as pressure pistons 32.1 and 32.2; it will be seen that they are not round. However, they each run in separate compression chambers 7.1 and 7.2 and each force air out of these compression chambers 7.1 and 7.2 into branch lines 33.1 and 33.2, which are jointly connected to an intake line 34 to the sealant container or tire. In addition to the pressure pistons 32.1 and 32.2, lubricant depots 41.1 and 41.2 are also provided.

    [0037] By virtue of this arrangement, twice the amount of compressed air can be delivered to the intake line 34. Of course, the components 33.1, 33.2 and 34 do not have to be configured as separate components as shown, and instead they can be integrated in the housing.

    [0038] In a further illustrative embodiment of the invention according to Figure 12, the so-called Wankel principle is used for a compressor P2. Here, a compartment 36, in which a non-round piston 37 rotates, is formed in a housing part 35. In the illustrative embodiment shown, this non-round piston 37 has a triangular shape, although other geometries are also conceivable. It is essential only that the non-round piston 37 forms different compression chambers 7.3 and 7.4 in the compartment 36, and the volume of said compression chambers can be modified during the rotation of the non-round piston 37 about the output shaft of the motor or an eccentrically mounted rotor 44. This rotor 44 has no internal toothing with step-up transmission. Instead, only one bearing is present.

    [0039] The individual compression chambers are separated from each other by double seals 38.1 to 38.3. The double seals 38.1 to 38.3 are each assigned lubricant depots 42.1 to 42.3, which lubricate lips 43.1 to 43.3.

    [0040] For example, if the non-round piston 37 rotates clockwise, the double seal 38.2 travels across an ejection opening 35.1, such that air can now be ejected from the compression chamber 7.4 through an opposite ejection opening 39.2. However, at the same time, air is sucked into the compartment 7.3 through a corresponding inlet. The inlets do not necessarily need valves, since the piston 37 takes over the control. The piston movement "replaces" a separate valve.
    List of reference signs
    1 motor 34 intake line 67  
    2 fan 35 housing part 68  
    3 step-up transmission wheel 36 compartment 69  
    4 output wheel 37 non-round piston 70  
    5 piston rod 38 double seal 71  
    6 piston 39 ejection opening 72  
    7 compression chamber 40 suction opening 73  
    8 valve piece 41 lubricant depot 74  
    9 line 42 lubricant depot 75  
    10 connection 43 lips 76  
    11 toothed wheel 44 rotor 77  
    12 toothed wheel 45   78  
    13 opening 46   79  
    14 toothing 47      
    15 fork element 48   A axis of 3.1
    16 side flank 49      
    17 connector stub 50      
    18 elongate opening 51      
    19 toothing 52      
    20 toothing of 3.1 53      
    21 arrow 54      
    22 uppermost tooth of 20 55      
    23 uppermost tooth of 19.1 56      
    24 tooth of 20 57      
    25 uppermost tooth of 19.2 58      
    26 arrow 59      
    27 lower tooth of 19.1 60   P compressor
    28 joint 61      
    29 pin 62      
    30 oblong hole 63      
    31 sliding piston 64      
    32 pressure piston 65      
    33 branch lines 66      



    Claims

    1. A compressor for discharging a medium, in particular tire sealant that is to be discharged from a container into a tire,
    wherein a motor (1) of the compressor (P) drives a step-up transmission wheel (3) for moving at least one piston (6 to 6.6) in a compression chamber (7), wherein the step-up transmission wheel (3) consists of two toothed wheels (11, 12) lying on each other when viewed in an axial direction,
    characterized in that
    the step-up transmission wheel (3) is connected eccentrically to an output wheel (4) and, by way of the latter, to a piston rod (5), which moves a piston (6) in a compression chamber (7); and in that
    the output wheel (4) consists of two wheel halves (4.1, 4.2), each with a toothing (14.1, 14.2), wherein the toothing (14.1) of one wheel half (4.1) extends about one arc distance and the toothing (14.2) of the other wheel half (4.2) extends about another arc distance.
     
    2. The compressor as claimed in claim 1,
    characterized in that
    the number of degrees is in each case 180°.
     
    3. The compressor as claimed in claim 1 or 2,
    characterized in that
    the two toothed wheels (11, 12) lying on each other interact alternately with one or other wheel half (4.1, 4.2) of the output wheel (4).
     
    4. The compressor as claimed in claim 3,
    characterized in that
    one toothed wheel (11) has a greater diameter than the other toothed wheel (12).
     
    5. The compressor according to the preamble of claim 1,
    characterized in that
    the step-up transmission wheel (3.1) interacts with two mutually opposite toothings (19.1, 19.2) of a fork element (15).
     
    6. The compressor as claimed in claim 5,
    characterized in that
    the fork element (15) forms, by means of two side flanks (16.1, 16.2), an elongate opening (18) into which the step-up transmission wheel (3.1) engages and in which the toothings (19.1, 19.2) are also arranged.
     
    7. The compressor as claimed in claim 5 or 6,
    characterized in that
    pistons (6.1 to 6.6) are arranged on both sides of the fork element (15).
     
    8. The compressor as claimed in one of claims 1 to 7,
    characterized in that
    the step-up transmission wheel (3.1) is provided only partially on its outer circumference with a toothing (20).
     


    Ansprüche

    1. Kompressor zum Ausbringen eines Mediums, insbesondere von Reifendichtmittel, das aus einem Behälter in einen Reifen auszubringen ist,
    wobei ein Motor (1) des Kompressors (P) ein Übersetzungsrad (3) zum Bewegen von zumindest einem Kolben (6 bis 6.6) in einer Kompressionskammer (7) antreibt, wobei das Übersetzungsrad (3) aus zwei in einer axialen Richtung gesehen aufeinander liegenden Zahnrädern (11, 12) besteht,
    dadurch gekennzeichnet, dass
    das Übersetzungsrad (3) exzentrisch mit einem Abtriebsrad (4) und, mittels des Letzteren, mit einer Kolbenstange (5) verbunden ist, die einen Kolben (6) in einer Kompressionskammer (7) bewegt; und dadurch, dass das Abtriebsrad (4) aus zwei Radhälften (4.1, 4.2) mit jeweils einer Zahnung (14.1, 14.2) besteht, wobei sich die Zahnung (14.1) einer Radhälfte (4.1) über eine Bogenlänge erstreckt und die Zahnung (14.2) der anderen Radhälfte (4.2) über eine andere Bogenlänge erstreckt.
     
    2. Kompressor nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Gradzahl in jedem Fall 180° beträgt.
     
    3. Kompressor nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
    die zwei aufeinander liegenden Zahnräder (11, 12) abwechselnd mit einer oder einer anderen Radhälfte (4.1, 4.2) des Abtriebsrads (4) zusammenwirken.
     
    4. Kompressor nach Anspruch 3,
    dadurch gekennzeichnet, dass
    ein Zahnrad (11) einen größeren Durchmesser aufweist als das andere Zahnrad (12).
     
    5. Kompressor nach dem Oberbegriff von Anspruch 1,
    dadurch gekennzeichnet, dass
    das Übersetzungsrad (3.1) mit zwei sich gegenüberliegenden Zahnungen (19.1, 19.2) eines Gabelelementes (15) zusammenwirkt.
     
    6. Kompressor nach Anspruch 5,
    dadurch gekennzeichnet, dass
    das Gabelelement (15), mittels zwei Seitenflanken (16.1, 16.2), eine längliche Öffnung (18) ausbildet, in die das Übersetzungsrad (3.1) eingreift und in der auch die Zahnungen (19.1, 19.2) angeordnet sind.
     
    7. Kompressor nach Anspruch 5 oder 6,
    dadurch gekennzeichnet, dass
    Kolben (6.1 bis 6.6) auf beiden Seiten des Gabelelements (15) angeordnet sind.
     
    8. Kompressor nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass
    das Übersetzungsrad (3.1) an seinem Außenumfang nur teilweise mit einer Zahnung (20) versehen ist.
     


    Revendications

    1. Compresseur pour décharger un milieu, en particulier un agent d'étanchéité de pneu à décharger d'un contenant dans un pneu,
    un moteur (1) du compresseur (P) entraînant une roue de transmission élévatrice (3) pour déplacer au moins un piston (6 à 6.6) dans une chambre de compression (7), la roue de transmission élévatrice (3) consistant en deux roues dentées (11, 12) reposant l'une sur l'autre lorsqu'elles sont observées dans une direction axiale, caractérisé en ce que
    la roue de transmission élévatrice (3) est connectée excentriquement à une roue de sortie (4) et, par le biais de cette dernière, à une tige de piston (5), qui déplace un piston (6) dans une chambre de compression (7) ; et en ce que
    la roue de sortie (4) consiste en deux moitiés de roue (4.1, 4.2), chacune avec une denture (14.1, 14.2), la denture (14.1) d'une moitié de roue (4.1) s'étendant sur une distance d'un arc et la denture (14.2) de l'autre moitié de roue (4.2) s'étendant sur une autre distance d'un arc.
     
    2. Compresseur selon la revendication 1, caractérisé en ce que le nombre de degrés est dans chaque cas de 180°.
     
    3. Compresseur selon la revendication 1 ou 2, caractérisé en ce que les deux roues dentées (11, 12) reposant l'une sur l'autre interagissent en alternance avec l'une ou l'autre moitié de roue (4.1, 4.2) de la roue de sortie (4).
     
    4. Compresseur selon la revendication 3, caractérisé en ce qu'une roue dentée (11) a un diamètre plus grand que l'autre roue dentée (12).
     
    5. Compresseur selon le préambule de la revendication 1, caractérisé en ce que la roue de transmission élévatrice (3.1) interagit avec deux dentures mutuellement opposées (19.1, 19.2) d'un élément fourche (15) .
     
    6. Compresseur selon la revendication 5, caractérisé en ce que l'élément fourche (15) forme, au moyen de deux flancs latéraux (16.1, 16.2), une ouverture allongée (18) dans laquelle la roue de transmission élévatrice (3.1) entre en prise et dans laquelle les dentures (19.1, 19.2) sont également agencées.
     
    7. Compresseur selon la revendication 5 ou 6, caractérisé en ce que des pistons (6.1 à 6.6) sont agencés sur les deux côtés de l'élément fourche (15).
     
    8. Compresseur selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la roue de transmission élévatrice (3.1) est munie uniquement partiellement sur sa circonférence extérieure d'une denture (20).
     




    Drawing























    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description