Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1982-09-03
1984-06-05
Spar, Robert J.
Material or article handling
Vertically swinging load support
Shovel or fork type
403347, 414706, E02F 386
Patent
active
044525591
ABSTRACT:
An attachment assembly for adjustably securing the control arm and bellcrank arm of an anti-rollback linkage for material handling buckets. The anti-rollback control arm includes a generally flat planar arm portion and a position adjusting shaft with the longitudinal axis of the position adjusting shaft being perpendicular to the longitudinal axis of the arm portion. The bellcrank arm is generally U-shaped in cross-section and includes openings through side wall flanges for receiving an end portion of the position adjusting shaft. The shaft end portion is adjustably secured to the bellcrank arm by a U-bolt fastener which extends in a direction perpendicular to the axis of the position adjusting shaft and which is attached to the bellcrank arm. The position adjusting shaft end portion includes spaced apart knurled peripheral band areas which are separated by at least one smooth peripheral area. As the U-shaped bolt fastener is tightened and pulled against the position adjusting shaft end portion, the knurled areas are embedded into the metal surrounding the openings through the bellcrank arm flanges thereby securely fastening the position adjusting shaft to the bellcrank arm at a desired location and preventing the position adjusting shaft from slipping on the bellcrank arm. The knurled peripheral band areas on the shaft end portion permit an almost infinite adjustment in spacing between the control arm and bellcrank arm during final assembly. Further, the attachment assembly between the control arm and bellcrank arm, including the shaft end portion, knurled peripheral band areas, and U-bolt fastener, provides an inexpensive means for positioning the control arm at a desired location for performing an anti-rollback function.
REFERENCES:
patent: 3009590 (1961-11-01), Kampert
patent: 3568869 (1971-03-01), Beiley et al.
patent: 3713557 (1973-01-01), Seaberg et al.
patent: 3792792 (1974-02-01), Bromberek et al.
patent: 3811587 (1974-05-01), Seaberg
patent: 3872990 (1975-03-01), York
patent: 4372729 (1983-02-01), Buschbom et al.
patent: 4375344 (1983-03-01), Baum et al.
Redenbarger Philip D.
Speers Leonard E.
J.I. Case Company
Siemens Terrance L.
Spar Robert J.
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