Collapsible crane backhitch and overload signal system

Details Collapsible crane backhitch and overload signal system Collapsible crane backhitch and overload signal system

1977-04-29

1978-12-26

Yasich, Daniel M.

Signals and indicators

Combined functions

Alarms with indicators

116124F, 212 39MS, 214761, G08B 0704

Patent

active

041310780

ABSTRACT:
An energy absorbing backhitch for a lift crane including a hollow deformable element which is collapsed between squeeze rollers when the crane is over loaded a predetermined amount with respect to its rated capacity. The backhitch also includes a lift pin and means for sensing deflection of the lift pin and actuating visual and audio signals at predetermined load conditions.

REFERENCES:
patent: 2703180 (1955-03-01), Brown
patent: 3079080 (1963-02-01), Mason
patent: 3087584 (1963-04-01), Jackson et al.
patent: 3132721 (1964-05-01), Jackson
patent: 3638211 (1972-01-01), Sanchez
patent: 3924752 (1975-12-01), Hoofnagle
patent: 4058178 (1977-11-01), Shinohara et al.

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