EP 0348612 A2 19900103 - Pipette.
Title (en)
Pipette.
Title (de)
Pipette.
Title (fr)
Pipette.
Publication
Application
Priority
PL 27184588 A 19880415
Abstract (en)
The present invention solves the problem of working out a design of a plain pipette which seves for drawing in, pipetting and dispensing the fluid of a strictly specified volume and which is characterized by a high repeatability of results. The said pipette consists of a round casing /1/ being simultaneously a handle thereof, whereto, via a round nut /2/, there is fitted a multi-step shank /3/. Inside the body of casing /1/, there is a plunger /4/, being in the form of a multi-step rod,which is being displaced downwards with the aid of a press means /16/ and of a round arbor /15/, contrary to the force being exerted by a lift-up spring /13/ which makes plunger /4/ return to its initial position. Furthermore, inside the body of casing /1/, centrally in the symmetry axis of the pipette, directly under press means /16/, there is a calibration unit comprising a multi-step calibration sleeve /19/, which is blocked from the top by a hold-down element /24/, being screwed into the body of casing /1/, inside whereof there freely slides an arbor /15/ being connected to press means /16/. The end of arbor /15/ is placed inside an elongated sleeve being a push rod /14/, which from the top rests with its flange upon the face of a stop /20/ being screwed into the internal thread of calibration sleeve /19/. From the top, upon the flange of push rod /14/, the pressure is being simultaneously exerted by a blow-out mechanism spring /22/, which from the top rests upon a washer /18/ being blocked by a ring /17/. The lower part of push rod /14/ gets in contact with a plunger's flange /10/, whereas between plunger's flange /10/ and the end of arbor /15/ there is a narrow slot /23/.
IPC 1-7
IPC 8 full level
B01L 3/02 (2006.01)
CPC (source: EP)
B01L 3/0217 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0348612 A2 19900103; EP 0348612 A3 19900912; CS 227189 A3 19920617; DD 283779 A5 19901024; HU T53459 A 19901028; LT IP796 A 19950227; LV 10400 A 19950220; PL 155157 B1 19911031; PL 271845 A1 19900108; RU 1836147 C 19930823
DOCDB simple family (application)
EP 89106634 A 19890413; CS 227189 A 19890412; DD 32765289 A 19890414; HU 187489 A 19890417; LT IP796 A 19930716; LV 920644 A 19921231; PL 27184588 A 19880415; SU 4613840 A 19890413