Hydraulic power transmission and braking system for vehicles
US3966365A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1974 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Jul 3, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/456
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A hydraulic power transmission and braking system for vehicles in which individual hydraulic wheel motors are connected through suitable control apparatus to a variable displacement hydraulic pump which is driven by an appropriate power source. The displacement of the pump varies automatically in response to hydraulic fluid pressure and flow rate requirements imposed by the vehicle operating conditions. The power transmission control apparatus automatically switches from the 4-wheel drive mode to the 2-wheel drive mode as the vehicle accelerates past a predetermined speed. The braking control system proportions the braking force applied to each of the hydraulic wheel motors in accordance with the load imposed on that wheel by the vehicle operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.