Frictional antirotation device

Claim 2

An assembly for mounting a fastener in a hole on a panel including in combination, a bUshing disposed in said hole, a fastener disposed in said bushing, means operatively connecting said bushing and said fastener for concomitant axial movement and for relative rotary movement, means for limiting movement of said bushing relative to said panel to movement between a retracted position and an extended position, a ring of resilient material housed by said bushing, and detents formed in said ring, openings in the wall of said bushing through which said detents extend, said detents extending beyond the edge of said hole in the extended position of the bushing releasably to hold the bushing in its extended position.

Claim 3

An assembly as in claim 1 in which said limiting means comprises a retaining ring surrounding said bushing, said bushing provided with longitudinally extending slots and projections on said retaining ring extending into said slots.

Claim 4

A fastener assembly including in combination a first elongated member having external threads along the length thereof, a second member provided with a generally cylindrical recess having a wall and having internal threads in said wall, said members being threadably interengageable over a length of travel from a point of initial engagement of said threads in response to relative rotation of said members around an axis; a generally cylindrical spring pin having a diameter less than that of said recess, and less than the minor diameter of said internal threads, means securing said pin to one of said members for movement therewith, and a generally cylindrical bore in the other member for receiving said pin, said bore having a diameter less than that of said recess and less than the minor diameter of said internal threads, said pin and said bore extending in the direction of said axis and being coaxial therewith, said bore having a diameter less than that of said pin to cause said pin frictionally to engage the wall of said bore in response to threaded interengagement of said members, one of said pin and said bore having a tapered portion facilitating entry of said pin into said bore.

Claim 5

A fastener assembly including in combination a first elongated member having external threads along the length thereof, a second member provided with a generally cylindrical recess having a wall and having internal threads in said wall, said members being threadably interengageable over a length of travel from a point of initial engagement of said threads in response to relative rotation of said members around an axis; a generally cylindrical spring pin having a diameter less than that of said recess, and less than the minor diameter of said internal threads, means securing said pin to one of said members for movement therewith, and a generally cylindrical bore in the other member for receiving said pin, said bore having a diameter less than that of said recess and less than the minor diameter of said internal threads, said pin and said bore extending in the direction of said axis and being coaxial therewith, said bore having a diameter less than that of said pin to cause said pin frictionally to engage the wall of said bore in response to threaded interengagement of said members, one of said pin and said bore having a tapered portion facilitating entry of said pin into said bore.

Claim 6

A fastener assembly including in combination a first elongated member having external threads along the length thereof, a second member provided with a recess having a wall and having internal threads in said wall, said members being threadably interengageable over a length of travel from a point of initial engagement of said threads in response to relative rotation of said members around an axis, a first generally cylindrical bore in said first member, a second generally cylindrical bore in the base of said recess in said second member, said second bore being of smaller diameter than said recess, said bores extending in the direction of said axis and being coaxial therewith, a generally cylindrical spring pin elongated in the direction of said axis and means for securing said spring pin in one of said bores with a length thereof extending out of the bore, said other bore having a diameter less than said spring pin to cause said pin frictionally to engage the wall of the other bore in response to threaded interengagement of said members.

Claim 7

A fastener assembly including in combination a first elongated member having external threads along the length thereof, a second member provided with a recess having a wall and having internal threads in said wall, said members being threadably interengageable over a length of travel from a point of initial engagement of said threads in response to relative rotation of said members around an axis, a first generally cylindrical bore in said first member, a second generally cylindrical bore in the base of said recess in said second member, said second bore being of smaller diameter than said recess, said bores extending in the direction of said axis and being coaxial therewith, a generally cylindrical spring pin elongated in the direction of said axis and means for securing said spring pin in one of said bores with a length thereof extending out of the bore, said other bore having a diameter less than said spring pin to cause said pin frictionally to engage the wall of the other bore in response to threaded interengagement of said members.

Claim 8

An assembly as in claim 4 in which said length of said spring pin relative to the length of said recess is such that said frictional engagement takes place only upon engagement of said threads.

Claim 9

An assembly as in claim 4 in which the end of one of said pin length and said other bore is tapered to facilitate entry of said pin into said other bore.

Claim 10

An assembly as in claim 4 in which said pin is secured in the bore of said first member.

Claim 11

An assembly as in claim 4 in which said pin is secured in the bore of the second member.

Claim 12

An assembly as in claim 4 in which said pin is a tubular element of resilient material having a single axially extending slit through the length of the wall thereof.

Claim 13

A fastener assembly as in claim 4 in which said pin has tapered ends.

Claim 14

A fastener assembly as in claim 4 in which said other bore is formed with an enlarged mouth.

Claim 15

A fastener assembly as in claim 4 in which said pin is tubular and in which said pin has a helical slot extending throughout the length of the wall thereof, the direction of said helical slot being opposite to the direction of said threads.

Claim 16

An assembly as in claim 4 in which said pin is tubular, said pin having a spiral slit extending through the wall thereof over the length of said pin, said slit forming feathered edges.

Claim 17

An assembly as in claim 4 in which said pin is tubular, said pin having a slit extending through the wall thereof over the length thereof and a tubular element nested within said pin, said tubular element having a slit through the wall thereof over the length thereof.

Claim 18

An assembly as in claim 4 in which said pin is tubular, said pin having a longitudinal slit in the wall thereof and a core of resilient material in said pin.

Claim 19

A fastener as in claim 4 in which said pin is provided with a plurality of slits extending partially along its length to form a cantilever spring.

Claim 20

An assembly as in claim 4 including an enlarged base on said pin to facilitate mounting of said pin in said one bore.

Claim 21

An assembly as in claim 4 in which said pin has a spiral transverse cross-sectional shape.

Claim 22

An assembly as in claim 4 in which said pin is wound from resilient wire.

Claim 23

An assembly as in claim 4 in which said pin has a generally S-shaped transverse cross-sectional configuration.

Claim 24

An assembly as in claim 20 including fillers of resilient material in the curves of said S-shaped pins.

Claim 25

An assembly as in claim 4 including means for mounting said first member in a hole on a panel, said mounting means comprising a bushing disposed in said hole, said first member being disposed in said bushing, means operatively connecting said bushing and said first member for concomitant axial movement and for relative rotary movement, means for limiting movement of said bushing relative to said panel to movement between a retracted position and an extended position, a ring of resilient material housed by said bushing and detents formed in said ring, openings in the wall of said bushing through which said detents extend, said detents extending beyond the edge of said hole in the extended position of the bushing releasably to hold the bushing in its extended position.