Measuring and testing – Rotor unbalance – In situ
Patent
1974-11-14
1976-04-06
Gill, James J.
Measuring and testing
Rotor unbalance
In situ
254 1, G01M 128
Patent
active
039481069
ABSTRACT:
A jack structure is provided and includes an elevatable portion spaced centrally between a pair of stationary anchor points relative to which the elevatable portion may be elevated. The elevatable portion includes a lift member elevatable therewith and engageable with, to lift, undersurface portions of a motorcycle frame which passes beneath the engine of the motorcycle. With the front of the motorcycle frame elevated and the rear portion of the motorcycle frame supported by the retractable stand with which most motorcycles are equipped, the front wheel of the motorcycle is spaced above the ground and the jack structure further includes adjustable length bracing rods which may be anchored between the aforementioned anchor points and the handgrip portions of the handle bar of the motorcycle in order to firmly lock the handle bar and front fork assembly of the motorcycle against oscillation relative to the frame while the front wheel of the motorcycle is being spun during a wheel balancing operation. Also, a spring-loaded lost motion movement dampening structure is provided for operably connecting one side of the lower end of the front fork assembly of the motorcycle to a wheel balancing assembly strobe pickup unit.
REFERENCES:
patent: 2548809 (1951-04-01), Norman
patent: 2565577 (1951-08-01), Schnoebelen
Gill James J.
Jacobson Harvey B.
O#Brien Clarence A.
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