Reciprocal attitude-angle self-differentiating device for pivota

Details Reciprocal attitude-angle self-differentiating device for pivota Reciprocal attitude-angle self-differentiating device for pivota

1989-12-12

1992-08-25

Spruill, Robert L.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Casters

Locked

280 98, B60B 3300

Patent

active

051407205

ABSTRACT:
Reciprocal attitude angle self-differentiating device (10) for pivotable wheels (11,12;110) of handtrucks, each of the wheels (11,12;110) being respectively rotatably mounted about a substantially horizontal axis (22,23;220) belonging to a wheel supporting body (21,15;210), the body (21,15;210) being rotatably mounted about a substantially vertical axis (29,30;290), in which at least one pair of wheels belonging to the handtruck being mutually coupled by means of a device (10) comprising:

REFERENCES:
patent: 1956798 (1934-05-01), Janssen
patent: 2557275 (1951-06-01), Geisse
patent: 2719724 (1955-10-01), Lundgren
patent: 3689101 (1972-09-01), Spence

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