Tractor power-takeoff engagement limit
US4938302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20648
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An interlock mechanism for use on a tractor to limit the engagement of the tractor power-takeoff only when the tractor engine is running at or below a predetermined speed of operation is disclosed wherein an interlock clip interconnects the control levers for the engine throttle and the power-takeoff engagement control such that the power-takeoff control lever is locked against moving into an on position whenever the throttle control lever has been moved to a predetermined position. The clip includes a first member having a cam surface thereon engageable with the throttle control lever and a second member movable into the path of movement of the PTO control lever whenever the first member is moved into a lockout position by the throttle control lever. The clip also includes a spring to permit yielding movement of the first and second members under conditions where the PTO control lever is moved into the on position and the throttle is subsequently moved into the predetermined position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.