Nutless bolt

摘要

A nutless bolt includes a body having a shaft and a stop coupled to the shaft. Shaft is dimensioned to allow passage through a hole formed in a structure into which the bolt is inserted. The stop prevents body from falling into or through the hole. An axial bore formed in body houses a locking mechanism extending radially from shaft to lock body and nutless bolt in the hole. An actuator pin movable along the bore in a generally down hole direction through various positions. Position L1 is a pre-application position; position L2 is a locking position; and position L3 is a release position. Pin is movable in the down hole direction from L2 where the pin causes the locking mechanism to extend radially from shaft to lock the body in the hole, to L3 where the pin is retained in the body and displaced relative to the locking mechanism.

主权项

1. A nutless bolt comprising:
a body having a shaft capable of insertion in to a hole and a stop coupled to the body, the stop configured to stop the body falling wholly into or through the hole, the shaft being provided with an axially extending bore, wherein the bore comprises a blind hole which is closed at a down hole end of the shaft and open at an up hole end of the shaft; a locking mechanism disposed in the shaft and operable to extend radially from the shaft to lock the body in the hole; and, an actuating mechanism disposed in the shaft and being movable axially in the bore in a down hole direction from a preapplied position in which the actuating mechanism does not cause the locking mechanism to extend radially from the shaft, to a locking position where the actuating mechanism causes the locking mechanism to extend radially from the shaft to lock the body in the hole, and subsequently to a release position down hole of the locking position where the actuating mechanism is retained in the body and displaced relative to the locking mechanism to a location enabling the locking mechanism to retract radially into the shaft and the bolt to be withdrawn.