Cylinder apparatus
US5876025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 16, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Apr 16, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B5/062
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A spring chamber (17) is formed above a piston (11) inserted into a housing (7), and the spring chamber (17) is communicated with an outside of the housing (7) through a breathing passage (41). A pressurized fluid is supplied to and discharged from an actuation chamber (18) formed below the piston (11). A clamping member (4) connected to the piston (11) is urged to a clamping position (X) by a clamping spring (21) within the spring chamber (17). A check valve seat (45) and a check valve chamber (46) are arranged orderly in the breathing passage (41). A checking member (47) within the check valve chamber (46) is pushed to the check valve seat (45) by a checking spring (48) for valve closing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.