Coupling hook for a three-point attachment of a tractor

Details Coupling hook for a three-point attachment of a tractor Coupling hook for a three-point attachment of a tractor

1977-03-14

1978-08-22

Song, Robert R.

Land vehicles

Wheeled

Articulated vehicle

280509, B60D 110

Patent

active

041084640

ABSTRACT:
A coupling hook has a latch element extending from a pocket through a passage to block a coupling pin in the hook opening in the locked position. The latch element is arcuate and has opposed curvilinear surfaces one of which is engageable with a fulcrum in the vicinity of an opening in the pocket through which an actuating lever of the latch element extends. The other curvilinear surface is engageable with a fulcrum in the vicinity of the passage and has a notch engageable with a bolt in the pocket in the locked position of the latch element. The latch element may be displaced to a release position either by lifting and then pulling the actuating lever or by a coupling pin engaging the curved end of the latch element to urge the latch element to a released position.

REFERENCES:
patent: 3539203 (1970-11-01), Baugh
patent: 3977698 (1976-08-01), Allworden
patent: 4014562 (1977-05-01), Kunze

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