Spring return system for a component able to move reciprocally
US4615507A · kind A · utility
Inventors
Key dates
| Filing date | Apr 18, 1985 |
| Grant date | Oct 7, 1986 |
| Priority date | — |
| Expiry date | Apr 18, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F1/128
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A spring return for the reciprocable slide of an hydraulic distributor. The return spring is trapped between flanges of opposed cup-shaped rings. The cup-shaped rings have conical sections which are positioned inside of the spring, but which do not contact the spring. Each cup-shaped ring has a transverse bottom, and each of the transverse bottoms surrounds the slide and contacts only a cylindrical centering section on the slide. The cylindrical centering sections on the slide are short, and each cylindrial centering section loses contact with the surrounding transverse bottom of the cup-shaped ring shortly after the slide moves relative to such cup-shaped ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.