EP 0739450 A1 19961030 - SEAL FOR A PISTON-CYLINDER UNIT
Title (en)
SEAL FOR A PISTON-CYLINDER UNIT
Title (de)
DICHTUNGSANORDNUNG AN EINER KOLBEN-ZYLINDER-EINHEIT
Title (fr)
DISPOSITIF D'ETANCHEITE POUR UNITE PISTON-CYLINDRE
Publication
Application
Priority
- CH 9500259 W 19951109
- CH 339294 A 19941114
Abstract (en)
[origin: US5826491A] PCT No. PCT/CH95/00259 Sec. 371 Date Jul. 10, 1996 Sec. 102(e) Date Jul. 10, 1996 PCT Filed Nov. 9, 1995 PCT Pub. No. WO96/15368 PCT Pub. Date May 23, 1996The device comprises a cylinder (3) and a piston (7) which is guided free of contact relative to the cylinder (3). A gap seal (12) is provided between the lateral surfaces (15, 14) of the cylinder (3) and of the piston (7). The gap seal (12) has a very thin and uniform annular cross section. The lateral surfaces (14, 15) of the cylinder liner (4) and of the piston (7) are essentially smooth and comprise a material with a linear thermal coefficient of expansion which is lower relative to steel. The precise maintenance of the sealing gap and the central guidance of the piston (7) in the cylinder liner (4) is ensured through two guides (8, 9) connected rigidly with the housing (5). These guides (8, 9) are elastic in the direction of the central axis (2) of the piston-cylinder unit and highly rigid transversely to the central axis (2). The arrangement formed with the aid of these guides (8, 9) of a gap sealing between piston (7) and cylinder (3) with minimum gap is free of contact and no abrasion of sealing material develops wherein the motions of the piston (7) are guided precisely centrally to the cylinder (3).
IPC 1-7
IPC 8 full level
F02F 5/00 (2006.01); F04B 35/04 (2006.01); F04B 39/00 (2006.01); F04B 39/04 (2006.01)
CPC (source: EP US)
F04B 35/045 (2013.01 - EP US); F04B 39/045 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9615368 A1 19960523; AT E166949 T1 19980615; AU 3769295 A 19960606; AU 691351 B2 19980514; CA 2181169 A1 19960523; CN 1071845 C 20010926; CN 1138890 A 19961225; DE 59502408 D1 19980709; DK 0739450 T3 19990201; EP 0739450 A1 19961030; EP 0739450 B1 19980603; ES 2118631 T3 19980916; JP 3512192 B2 20040329; JP H09507894 A 19970812; US 5826491 A 19981027
DOCDB simple family (application)
CH 9500259 W 19951109; AT 95935791 T 19951109; AU 3769295 A 19951109; CA 2181169 A 19951109; CN 95191211 A 19951109; DE 59502408 T 19951109; DK 95935791 T 19951109; EP 95935791 A 19951109; ES 95935791 T 19951109; JP 51561496 A 19951109; US 66950396 A 19960710