Automatically setting draw pin assembly
US5769559A · kind A · utility
Inventor
Key dates
| Filing date | Jun 14, 1995 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Jun 14, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/591
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A draw pin assembly includes a hammer strap that mounts on the drawbar and a draw pin that extends through aligned draw pin holes in the hammer strap and drawbar. A latch mechanism supports the draw pin in a retracted position while a trigger in the hitch-receiving space of the assembly releases the latch when a towed implement hitch comes into the proper alignment with the draw pin. An automatic locking mechanism is used to lock the draw pin against inadvertent release. In one embodiment, the draw pin is fully recessed into the hammer strap when set and the latch and locking functions are provided by a loop type handle connected to the draw pin. This eliminates any elements projecting above the hammer strap to maximize the clearance for a tractor power takeoff.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.