Hand truck stair tread engaging device

Details Hand truck stair tread engaging device Hand truck stair tread engaging device

1979-04-16

1981-09-22

Peters, Jr., Joseph F.

Land vehicles

Step or abutment ascending type vehicle

With endless track

180 922, 305 17, 305 28, B62B 502

Patent

active

042906180

ABSTRACT:
In a conventional hand truck, a stair tread engaging device having reduced friction and improved mobility provided by a plurality of rollers each rotating freely in its own socket and only on its own axis without forward movement.

REFERENCES:
patent: 1583114 (1926-05-01), Bierly
patent: 2193283 (1940-03-01), Harberson
patent: 2260027 (1941-10-01), Hotson
patent: 2620041 (1952-12-01), Chenette
patent: 4136888 (1979-01-01), Bowie

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