Self locking connector

Details Self locking connector Self locking connector

1991-03-25

1993-02-16

Trettel, Michael F.

Pipe joints or couplings

With means blocking release of holding means

Lock nut or washer

285902, 403320, F16L 5500

Patent

active

051865017

ABSTRACT:
A self-locking connector comprising first and second tubular fittings, the first fitting having an annular intermediate shoulder and a threaded end, and the second fitting having an annular shoulder adjacent one of its ends. A nut is rotatably mounted on the second fitting and threaded to the threaded end of the first fitting, and the nut has a flanged end which is adapted to engage the shoulder on the second fitting to bring the two fittings into axially aligned mating and sealing relationships as the nut is tighten onto the threaded end of the first fitting. A frusto-conical shaped resilient lock washer is interposed between the shoulder on the first fitting and the nut. The adjacent edges of the nut and the washer have mating ramps formed thereon, with each ramp having an angle greater than the helical angle of the threads of the first fitting and of the nut. When the nut is tighten, the ramps on the washer and on the nut mate with one another, and effectively lock the nut against rotation with respect to the first fitting.

REFERENCES:
patent: 3221792 (1965-12-01), Poupitch
patent: 3438416 (1969-04-01), Thurston
patent: 3608933 (1971-09-01), Lee
patent: 4286807 (1981-09-01), Bachli
patent: 4940260 (1990-07-01), Odriozola
patent: 5011351 (1991-04-01), Terry

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