Mechanical load fuse assembly

Details Mechanical load fuse assembly Mechanical load fuse assembly

1998-07-16

1999-12-28

Browne, Lynne H.

Joints and connections

Including frangible component

403 41, F16B 2700

Patent

active

060072679

ABSTRACT:
A mechanical load fuse assembly, particularly designed for lifting cables used with helicopters, consists of first and second end assemblies. An axial shear pin is releasably secured between the first and second end assemblies; and this shear pin is calibrated to have a breaking point of a pre-established amount when axial forces are applied to it. A protective sleeve is located over the shear pin between the first and second end assemblies when the shear pin is releasably secured. This protective sleeve has first and second positions of operation. A coil spring is used to normally bias the protective sleeve to the first position. In this position, radially projecting pins on the first and second end assemblies engage corresponding slots on the protective sleeve to prevent relative rotation of the first and second end assemblies relative to one another, so long as the sleeve is in the first position. The protective sleeve may be moved to the second position against the force of the spring to allow the first and second end assemblies to be rotated relative to one another to facilitate the removal and insertion of axial shear pin devices.

REFERENCES:
patent: 3185413 (1965-05-01), Walker
patent: 3304031 (1967-02-01), Mulquin
patent: 3794057 (1974-02-01), Badger
patent: 4016796 (1977-04-01), Brannan
patent: 4330926 (1982-05-01), McCall
patent: 5122007 (1992-06-01), Smith
patent: 5466082 (1995-11-01), Sherar
patent: 5599129 (1997-02-01), Clifton

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