Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Reexamination Certificate
2006-10-31
2008-10-14
Wilson, Lee D (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
C254S134000, C254SDIG010, C254S00200C
Reexamination Certificate
active
07434783
ABSTRACT:
A jack stand is for use with a power unit. The power unit includes a rectangular frame and a pair of parallel lift arms having forward ends extendable vertically over the frame. The forward ends of each lift arm have a frusta-conical disc pivotally attached to the inner sides thereof, so that the upper surface of the disc inclines upwardly at an acute angle. The jack stand includes a base plate with a first tubular frame attached thereto and extending vertically therefrom. An upper tubular frame is positioned in telescoping relationship relative to the first tubular frame and has a rectangular lifting plate attached to the upper end thereof. The lifting plate has parallel sides with flanges extending downwardly, with the lower ends of the flanges having an acute angle for engaging the upper surface of the frusta-conical discs of the power unit. The angle of the upper surface of the frusta-conical disc extends upwardly and the acute angle of the lower ends of the side flanges of the lift plate extends downwardly, each at an angle ranging from about 15° to about 30°, and are preferably both inclined at an angle of about 20°.
REFERENCES:
patent: 4289298 (1981-09-01), Kameda
patent: 4589630 (1986-05-01), Arzouman
patent: 4641813 (1987-02-01), Arzouman
patent: 4697788 (1987-10-01), Arzouman
patent: 4960264 (1990-10-01), Arzouman et al.
patent: 5110089 (1992-05-01), Slay
patent: 5183235 (1993-02-01), Arzouman et al.
patent: 2003/0218156 (2003-11-01), Arzouman
patent: 2003/0218157 (2003-11-01), Arzouman
patent: 2003/0218158 (2003-11-01), Arzouman
patent: 2003/0218159 (2003-11-01), Arzouman
Turner Roger C.
Wilson Lee D
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