Hydraulic spring-loader cylinder with wear adjustment
US4724741A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 5, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Sep 5, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2121/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Spring-loaded cylinder with a tension piston (7) which can be pressurized by a pressure medium. Between the tension piston (7) and a piston rod (3) movable thereby, a cylinder-piston arrangement (19, 20, 21) is installed, whose cylinder chamber (21) can be pressurized from the pressurization chamber (10) of the tension piston (7) via a sealing ring (18), constituting a reflux valve. A first axial friction coupling (17, 18) is provided between the tension piston (7) and the piston rod (3) and a second friction coupling (13, 14) between a housing section (1) and the piston rod (3). The second friction coupling (13, 14) has a buffer clearance A, corresponding to the nominal application stroke. The friction force of the first friction coupling (17, 16) is greater than the expansion force of the cylinder-piston arrangement (19, 20, 21), and the friction force of the second friction coupling (13, 14) is greater than the friction force of the first friction coupling (17, 16) reduced by the expansion force. The cylinder chamber (21) of the cylinder-piston arrangement (19, 20, 21) can be randomly emptied into the pressurizing chamber (10) of the tension piston (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.