Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1989-11-22
1991-06-25
Spar, Robert J.
Material or article handling
Vertically swinging load support
Shovel or fork type
92 30, 212189, 188300, 2807641, E02F 332
Patent
active
050262467
ABSTRACT:
A backhoe pivotally supported from a prime mover is disclosed wherein the hydraulic cylinders operably connected to the outrigger stabilizers are provided with a detent to maintain the outrigger stabilizers in an elevated transport position until being pressurized to extend the cylinders and, thereby, rotate the stabilizers into a ground engaging position. The detent is in the form of a projection extending inwardly from the barrel of the outrigger stabilizer cylinder and positioned for engagement with a deformable detent ring when the piston is moved to the fully retracted position. The detent includes a relief to permit the flow of hydraulic fluid past the engagement between the detent ring and the projection so that hydraulic cylinder will not become hydraulically locked.
REFERENCES:
patent: 3889576 (1975-06-01), Sheffer et al.
patent: 4295661 (1981-10-01), Maurer
patent: 4411584 (1983-10-01), Shumaker
patent: 4527780 (1985-07-01), Bich
patent: 4651623 (1987-03-01), Rogers
Bay Tod A.
Frahm Jeffry R.
Gilbert Robert
Roesler David F.
Ford New Holland Inc.
Marquette Darrell F.
Miller Larry W.
Seemar Frank A.
Spar Robert J.
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