Use of an electrified pin to detect load transfer to a...

Details Use of an electrified pin to detect load transfer to a... Use of an electrified pin to detect load transfer to a...

2008-04-08

2008-04-08

Ridley, Richard (Department: 3682)

Machine element or mechanism

Mechanical movements

Reciprocating or oscillating to or from alternating rotary

C340S438000

Reexamination Certificate

active

07353723

ABSTRACT:
The invention relates to an actuator for actuating a moving member, said actuator essentially comprising a screw and at least two nuts engaged on the screw, relative movement between the screw and the nuts generating said actuation, said actuator further comprising a pin through which an electrical link passes, a force-transmitting element placed in the path of the force between the screw and the moving member via one of the nuts, and a mechanical extension of said force-transmitting element that extends to the vicinity of the other nut, the pin passing both through the mechanical extension and through an element coupled to the other nut so that any abnormal shift in the force-transmitting element relative to the screw results in shear between its mechanical extension and the element coupled to the other nut, causing the pin to break and causing the electrical link to be broken.

REFERENCES:
patent: 4644811 (1987-02-01), Tervo
patent: 5017912 (1991-05-01), Willis
patent: 6234034 (2001-05-01), Ando
patent: 6498470 (2002-12-01), Kelly et al.
patent: 6928895 (2005-08-01), Davies et al.

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