US 5,699,702 AGranted

Wrenching tool with free-floating, self-relieving anti-rotation key

AssigneeFairchild Holding Corp.

InventorAlan R. Myers

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Abstract

There is disclosed an improvement in rotational wrenching tools used in the aerospace industry to apply a fastener nut to a fastener pin at a limiting, preload torsion. The pins used for the fasteners have an end recess which receives a rotational stationary key that is supported in the tool by a key holder which is slidably received in a central passage of the rotationally driven socket sleeve of the tool. This invention provides a first rotational detent at the forward end of the key holder and the central through passage and a first spring to bias the key holder axially forward into engagement with said first rotational detent to cause the key holder to rotate with the sleeve and thereby facilitate engagement and disengagement of the key with the fasteners. The invention also provides a second rotational detent at the rear end of the key holder and the housing to rotationally immobilize said key holder during run-up of the fastener nuts on the fastener pins.

Claims7

Dependent claims

In a rotational wrenching tool for applying a fastener nut to a fastener pin having an end recess, said tool having a housing supporting a rotationally driven sleeve with a distal socket to receive said fastener nut, and a central through passage in which is axially slidably received a key holder, and a key removably seated in said key holder, said key having an outer end which is to be positioned in said end recess of said fastener pin for rotationally immobilizing said fastener pin, the improvement comprising:

a. a first rotational detent at the forward end of said key holder and said central through passage to rotationally index said key holder to said sleeve and including a first spring to bias said holder axially forward into engagement with said first rotational detent;
and
b. a second rotational detent at the rear end of said key holder and said housing to rotationally immobilize said key holder;
whereby said key holder is driven in rotation with said sleeve until said key is seated in said end recess of said fastener pin, is rotationally immobilized during the run up of said fastener nut and is rotationally driven after application of said fastener nut to free said key and permit removal of said tool from the applied fastener.

1 more element

Dependencies are inferred from the claim text.