Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1998-01-30
2000-09-12
Mai, Lanna
Material or article handling
Vertically swinging load support
Shovel or fork type
414707, 414700, E02F 338, E02F 328
Patent
active
061168475
ABSTRACT:
A lift assembly for lifting an implement relative to a frame of a work machine is disclosed. The lift assembly includes a lift arm having a frame pin bore, a cylinder pin bore, a linkage pin bore, and an implement pin bore. The frame pin bore and said cylinder pin bore define a first line. The frame pin bore and said implement pin bore define a second line. The second line is located above said first line. The first line and said second line define an angle which is greater than three degrees. A plane intersects said first line at a center point of said cylinder pin bore and is normal to said first line. A said plane divides said lift arm into a frame-side segment and an implement-side segment. The first line includes a first segment which is entirely coincident with said implement-side segment of said lift arm. The linkage pin bore is defined in said frame-side segment. The lift assembly further includes a tilt lever which is pivotably coupled to the lift arm at said linkage pin bore. The lift assembly further includes a tilt cylinder which is coupled to said tilt lever for tilting said implement which is pivotably coupled to said lift arm. The lift assembly further includes a lift cylinder for moving said lift arm between an upper position and a lower position, wherein said lift cylinder is coupled to said lift arm at the cylinder pin bore.
REFERENCES:
patent: D323168 (1992-01-01), Ericsson
patent: 3941262 (1976-03-01), Moser et al.
patent: 4768917 (1988-09-01), Garman
patent: 5111578 (1992-05-01), Ball et al.
patent: 5152659 (1992-10-01), Waka
patent: 5156520 (1992-10-01), Ericson et al.
patent: 5599158 (1997-02-01), Ajilore
Branham Dana D.
Ginn Ronald Mark
Leyda Kirt D.
Caterpillar Inc.
Mai Lanna
Ririe Andrew J.
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