Coupling hook
US4279431A · kind A · utility
7Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 13, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Jul 13, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a coupling hook for the lower links of a three-point linkage for connecting an agricultural implement to a tractor, side walls define the lateral confines of a pocket. The side walls are shaped to form a jaw into which a coupling element is seated. A latch within the pocket secures the coupling member in the jaw. A bottom wall extends across the lower ends of the side walls and forms a closure for the pocket. One of the side walls has an opening just above the bottom wall for removing dirt from the lower end of the pocket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.