Bibliographic data

Document AT000000388658B (Pages: 5)

Bibliographic data Document AT000000388658B (Pages: 5)
INID Criterion Field Contents
54 Title TI [DE] DOPPELT WIRKENDE HYDRAULISCHE KOLBEN-ZYLINDEREINHEIT
71/73 Applicant/owner PA BOCK ORTHOPAED IND, DE
72 Inventor IN HORVATH EDUARD ING
22/96 Application date AD Sep 22, 1987
21 Application number AN 239987
Country of application AC AT
Publication date PUB Aug 10, 1989
33
31
32		 Priority data PRC
PRN
PRD

51 IPC main class ICM A61F 2/50
51 IPC secondary class ICS
IPC additional class ICA
IPC index class ICI
Cooperative patent classification CPC A61F 2/68
A61F 2/74
MCD main class MCM F01B 19/04 (2006.01)
MCD secondary class MCS A61F 2/68 (2006.01)
A61F 2/74 (2006.01)
F01B 23/00 (2006.01)
MCD additional class MCA
57 Abstract AB [EN] A double-acting hydraulic piston-and-cylinder unit adapted to constitute a damper for movements in a human joint prosthesis has a boot sealingly connected to the cylinder and the piston rod to receive the hydraulic fluid under pressure as the hydraulic fluid is displaced from one or the other of two cylinder chambers upon displacement of the piston rod. The boot has a conically widening region or segment sealingly secured to the rod and adjoining the cylindrical segment of the boot surrounding the cylinder in a transition segment formed as an outwardly convex bulge and designed to ensure that initial inward movement of the piston rod will give rise to a plate membrane deformation of the elastic boot while only further displacement will result in a rolling action of the membrane. This ensures a generally cylindrical uniform configuration of the boot in all positions of the rod as is essential for effective use in a prosthesis.
56 Cited documents identified in the search CT
56 Cited documents indicated by the applicant CT
56 Cited non-patent literature identified in the search CTNP
56 Cited non-patent literature indicated by the applicant CTNP
Citing documents No results
Sequence listings
Search file IPC ICP A61F 2/68
F16F 9/10