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James W Vroom, 7227151 N 92Nd St, Scottsdale, AZ 85262

James Vroom Phones & Addresses

27151 N 92Nd St, Scottsdale, AZ 85262    480-5020371   

6945 Cheney Dr, Paradise Valley, AZ 85253   

6954 E Cheney Dr, Paradise Valley, AZ 85253   

Payson, AZ   

721 6Th St, Tucson, AZ 85719   

725 E 6Th St, Tucson, AZ 85719   

11371 E Pinon Dr, Scottsdale, AZ 85262   

Mentions for James W Vroom

Publications & IP owners

Us Patents

Assist Apparatus For Ramps

US Patent:
4657233, Apr 14, 1987
Filed:
Apr 19, 1985
Appl. No.:
6/725260
Inventors:
James W. Vroom - Paradise Valley AZ
International Classification:
B65G 6700
US Classification:
267155
Abstract:
A coil spring, mounted within a cylinder and axially coincident with the pivot axis between a trailer and a ramp pivotally attached thereto, exerts a force angularly proportional to angular deviation of the ramp from its upright position to reduce the apparent weight of the ramp during manual repositioning of the ramp.

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