Ram locking device
US4356760A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1980 |
| Grant date | Nov 2, 1982 |
| Priority date | — |
| Expiry date | Apr 21, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8807
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A locking device is integrated in a coupling fixed on a ram cylinder for feeding the cylinder with a first fluid. The circulation of that fluid is controlled by a second fluid. The device has (1) a cylindrical member with a tightening head at a first end, a second threaded end to engage in the cylinder, and an intermediate portion between the two ends. The intermediate portion has an axial outlet passage to the cylinder, and a lateral opening terminating at the passage. The device has a coupling head with a through bore, and an internal passage for the first fluid. The bore is shaped to receive the intermediate portion and to couple the opening to the feed passage. The device has movable internal members to modify circulation of the first fluid by moving under the combined effects of a resilient element and the pressure of a second fluid applied to an external locking inlet. The improvement is that the movable members (42, 70) are disposed in the axis XX' of the cylindrical element (4) in a region thereof extending from the intermediate portion (20) to the tightening head ( 15), the latter receiving the locking inlet (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.