Hydrostatic braking device for vehicles running downhill
US4101012A · kind A · utility
2Cited by
2References
5Claims
0Family size
Inventor
Key dates
| Filing date | Oct 4, 1976 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Oct 4, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D57/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A retarder for selectively braking a vehicle during downhill driving, comprises a stack of Belleville springs, and a pump driven by the impetus of the vehicle rolling downhill, to pump oil between the peripheries of the Belleville springs thereby to exert resistance to the pump and hence to the downhill rolling of the vehicle. The compression of the stack of the springs, and hence the amount of energy absorbed by the lamination of the oil between the peripheries of the springs, is selectively controlled by the operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.