Title: Tow cart safety mechanism

Abstract: A tow cart is provided with an arrangement in which the tow or drive pin is adapted to be moved out of engagement with the conveyor drive, in response to a predetermined degree of obstruction to the tow cart, by a spring-loaded overcenter double toggle movable from a cocked to a released position in response to the obstruction, and in which the drive pin is pivotally supported so that it may swing forwardly away from the conveyor drive upon the release. In the cocked position of the toggle mechanism the mechanism restrains the forward pivotal movement of the drive pin.

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Inventors: Parker, Bruce W. (Norman, OK, US)
Morrison, Jim H. (Norman, OK, US)
Noble, Arliss B. (Norman, OK, US)

Application Number: 551940
Filing Date: 1975-02-21
Publication_date: 1976-08-10
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 104/172.2
Other Classes:
US Patent Ref:

1498099	Jun, 1924	Howland-Shearman	74/106.
3106172	Oct, 1963	Robbins et al.	104/172.
3659530	May, 1972	Klamp	104/172.
3789767	Feb, 1974	Krammer	104/172.
3824930	Jul, 1974	Biessener	104/172.
3844183	Oct, 1974	Wilke	74/520.

Other Refs:
Primary Examiner: Spar, Robert J.
Assistant Examiner: Reese, Randolph A.
Attorney: Arenz; E. C.