Pipe joints or couplings – With means blocking release of holding means
Patent
1998-04-30
2000-04-18
Nicholson, Eric K
Pipe joints or couplings
With means blocking release of holding means
285 92, 285354, 285357, F16L 3500
Patent
active
060506091
ABSTRACT:
A first coupling member has a peripheral facing surface with a pair of annular slots, each of a different length and width. A second coupling member has a lock ring longitudinally slidable thereon with a facing surface having a pair of annular raised locking tabs sized to correspond to the respective annular slots. A resilient annular spring mounted within the lock ring urges it toward the first coupling member so that the locking tabs engage their respective slots when the coupling is tightened to a predetermined extent during rotation in the locking direction to releasably and positively lock the coupling. An indicator stripe on the peripheral edge of the first coupling member is exposed before the locking tabs and slots are engaged. Alignment between the respective locking tabs and slots allows longitudinal movement of the lock ring so that it covers the indicator stripe. One of the coupling members has a peripheral groove and two angularly spaced longitudinal keyways of differing widths which intersect the peripheral groove. The annular spring has an internal peripheral edge with a plurality of peripherally spaced spring tabs for holding it in the peripheral groove. A spring key on the internal peripheral edge of the annular spring has a width corresponding to the width of one of the keyways to rotationally position the annular spring with the coupling member. The annular wall of the lock ring has two angularly spaced keys of differing widths which correspond to the widths of the keyways and are received therein to angularly position the lock ring with the coupling member and the spring.
REFERENCES:
patent: 3201149 (1965-08-01), Bragg
patent: 3999825 (1976-12-01), Cannon
patent: 4008937 (1977-02-01), Filippi
patent: 4249786 (1981-02-01), Mahoff
patent: 4285564 (1981-08-01), Spinner
patent: 4346428 (1982-08-01), Gale
patent: 4757593 (1988-07-01), Pallini, Jr. et al.
patent: 4785858 (1988-11-01), Valentini et al.
patent: 4808117 (1989-02-01), Gale et al.
patent: 4881760 (1989-11-01), Runkles et al.
patent: 4900070 (1990-02-01), Runkles et al.
patent: 4928202 (1990-05-01), Gale et al.
patent: 5188398 (1993-02-01), Parimore, Jr. et al.
patent: 5215336 (1993-06-01), Worthing
patent: 5348349 (1994-09-01), Sloane
patent: 5350200 (1994-09-01), Peterson et al.
patent: 5746454 (1998-05-01), Webb
patent: 5851035 (1998-12-01), Marc et al.
Boscaljon Ronald W.
Jewell David E.
Rossway Ronald A.
Nicholson Eric K
Stanley Aviation Corporation
LandOfFree
Positive lock coupling does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Positive lock coupling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positive lock coupling will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2331003