Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1993-03-10
1997-01-28
Underwood, Donald W.
Material or article handling
Vertically swinging load support
Shovel or fork type
37468, E02F 900
Patent
active
055972837
ABSTRACT:
A quick coupling for attaching implements to heavy equipment includes a coupler that is rotatably attached to the stick and implement linkage of the equipment boom at attachment axes that are oriented at the preferred geometric relationship for that particular piece of equipment. The coupler is releasable attachable to a bracket that is attached to the implement. Thus, implements are interchangeably attached to equipment having different geometric relationships between their attachment axes. Bosses located on the coupler coaxially with the axis of rotation on the stick are received in conforming receptacles formed in the bracket. A wedge movable in tracks defined in the coupler upon activation of a piston cylinder engages cam surfaces on a coupling element located on the bracket to pull the bracket toward the coupler when the wedge is pulled downwardly. Mating surfaces on the coupler and bracket cause the bosses to be urged into the receptacles when the bracket is pulled toward the coupler. Thus, the wedge firmly couples the elements even when they have started to experience wear. Springs normally bias the wedge downwardly in the tracks so that the device will not become uncoupled upon loss of hydraulic pressure. The wedge is drilled to receive bolts that fit into threaded bores in the coupler, which allows the device to be coupled manually if desired.
REFERENCES:
patent: 3556323 (1971-01-01), Heimmermann
patent: 3818551 (1974-06-01), Coughran, Jr.
patent: 4881867 (1989-11-01), Essex et al.
patent: 4955779 (1990-09-01), Knackstedt
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