Drive system, controlling braking system therefor, and safety lock controlling both
US4310078A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1980 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | May 1, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D11/183
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Hydrostatic tractor's drive and braking system, particularly one controlled, first, by a tractor safety lock lever which, when put "on," both neutralizes the engine-driven, variable ratio hydrostatic system for positively preventing drive and also sets the brakes for simultaneously positively preventing rolling and, second, by a two-stage brake pedal which is overcontrolled by the safety lock lever whenever the lever is "on" and which operates initially to intensify engine braking by increasing the hydraulically fixed ratio of the hydrostatic drive and its rate of dynamic dissipation of power, and which operates finally to neutralize drive and set brakes in an overlapping sort of way with the function of the safety lock lever and exactly the same as the safety lock lever does whenever "on."
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.