Rotation resistance device for a bolt of a tightening device of

Details Rotation resistance device for a bolt of a tightening device of Rotation resistance device for a bolt of a tightening device of

1991-08-06

1993-05-04

Shoop, Jr., William M.

Music

Instruments

Drums

84411R, G10D 1302

Patent

active

052084124

ABSTRACT:
A drum head is held over the open end of a drum body by a drum hoop passing around the edge of the drum head. A lug on the side of the drum body has an axial opening which receives a lug nut. The lug nut has an axial threaded opening. A threaded bolt, which engages the drum head hoop, is tightened into the threaded opening of the lug nut and draws the drum hoop to tighten the drum head. A radial opening extends radially through the lug nut from the opening in the lug to the threaded opening for the bolt. An elastic bolt engaging and bolt rotation resisting chip in the radial opening engages the lug on the outside and the bolt in the lug nut opening for restraining rotation of the bolt. There may be a drum head at each end of the drum body, a respective lug near each drum head and a single element defining both lug nuts.

REFERENCES:
patent: 4122747 (1978-10-01), Yamashita
patent: 4790229 (1988-12-01), Hoshino
patent: 4870883 (1989-10-01), Gauger
Machine Design, "Threaded Fasteness", Nov. 19, 1987, pp. 56-68.

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