Rotary drive mechanisms

Details Rotary drive mechanisms Rotary drive mechanisms

1978-03-27

1981-02-17

Staab, Lawrence J.

Machine element or mechanism

Mechanical movements

Rotary to intermittent unidirectional motion

74112, 74128, 74813R, 74825, F16H 2704

Patent

active

042507618

ABSTRACT:
In computerized tomographic apparatus having an intermittent rotational motion the scanning time can be reduced by increasing the rotation speed. However this can result in excessive forces being transmitted to the stationary mainframe of the equipment. The invention reduces that problem by balancing the forces of rotation at least in part by appropriately placed counter masses. In one embodiment the counter masses rotate and properly balance the forces. In another embodiment they move linearly and delay the application of the forces to the mainframe and transmit the delayed forces over a longer period.

REFERENCES:
patent: 1303725 (1919-05-01), Rhine
patent: 2209858 (1940-07-01), Steiert
patent: 2685822 (1954-08-01), Walton
patent: 3120134 (1964-02-01), Sweeney
patent: 3236122 (1966-02-01), Biernson
patent: 3518899 (1970-07-01), Greenberg et al.
patent: 3749372 (1973-07-01), Funk
patent: 3778614 (1973-12-01), Hounsfield
patent: 3782506 (1974-01-01), Yarrington
patent: 3946234 (1976-03-01), Hounsfield

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