Adjustable length upper guide member
US4295389A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1978 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Nov 20, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/32451
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An adjustable length upper guide member for the hitch attachment of a tractor has an outer tubular guide element within which is telescopingly positioned an inner guide element so as to be relatively displaceable thereto. A housing on the outer guide element has a pair of jaws pivotally mounted therein and the jaws each have first arms which are engageable with annular grooves on the inner guide element and second arms which form actuating cams facing each other. An operating lever has an eccentric portion within the housing and one side of the eccentric portion is engageable against the housing and the other side of the eccentric portion engageable with the actuating cams so that pivoting of the lever causes the eccentric portion to act upon the cams and pivot the jaws to a disengaged position. A support lever is pivotally connected to the operating lever so as to support the operating lever in the position in which the jaws are disengaged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.