Rotational backlash compensating cam for stored energy...

Details Rotational backlash compensating cam for stored energy... Rotational backlash compensating cam for stored energy...

2007-03-06

2007-03-06

Enad, Elvin (Department: 2832)

Electricity: circuit makers and breakers

Contact moved by sudden release of stored energy,

C218S154000

Reexamination Certificate

active

11393544

ABSTRACT:
The present invention provides a motor control cam having a relief channel adjacent to the switch lever notch. The relief channel extends generally circumferentially from said switch lever notch under the second, wide diameter portion of the cam surface. In this configuration, when the switch lever is in the switch lever notch and a counter rotation of the cam occurs, the switch lever enters the relief channel and does not impact against the cam. As such, the switch lever is not damaged or moved out of adjustment by a counter rotation of the cam.

REFERENCES:
patent: 3562463 (1971-02-01), Charbonneau et al.
patent: 3773995 (1973-11-01), Davies
patent: 6472627 (2002-10-01), Yoon
patent: 6646216 (2003-11-01), Fanta et al.
patent: 7019606 (2006-03-01), Williams et al.
Cutler-Hammer, Instructions for Installation, Operation and Maintenance of Type VCP-W Vacuum Circuit Breakers, pp. 1-60, I.B. 32-255-1FJul. 1997, Pittsburgh, PA.

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