Length-adjustable upper steering arm for a three-point coupling

Details Length-adjustable upper steering arm for a three-point coupling Length-adjustable upper steering arm for a three-point coupling

1990-11-13

1991-12-31

Taylor, Dennis L.

Earth working

Mast type hitch

74586, 172679, 403 46, 280482, 411205, A01B 59043, A01B 6302, B60D 142

Patent

active

050763695

ABSTRACT:
A length-adjustable upper steering arm for a three-point coupling device, including a connecting eye having a threaded shank, and a coupling hook having a threaded shank, both of which are received in threaded bores of a sleeve, and which threads extend in opposite directions. To achieve a locked position or disengaged position of the coupling hook relative to the sleeve, there are provided an actuating lever and a locking ratchet which is partially pivotable independently thereof. Because the spring-loaded locking ratchet may be pivoted from the disengaged position into the engaged position independently of the actuating lever, the thread is not subject to jamming forces.

REFERENCES:
patent: 2648997 (1953-08-01), Sawyer
patent: 3731951 (1973-05-01), Gruenberger
patent: 4126057 (1978-11-01), von Allworden et al.
patent: 4146246 (1979-03-01), Geisthoff
patent: 4295389 (1981-10-01), Geisthoff et al.
patent: 4418935 (1983-12-01), O'Connor
patent: 4778194 (1988-10-01), Koch et al.

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