Pipe joints or couplings – With means blocking release of holding means – Thread lock
Patent
1998-09-15
2000-09-05
Arola, Dave W.
Pipe joints or couplings
With means blocking release of holding means
Thread lock
285114, 2851245, 285911, 2852881, 165905, 29428, 29890031, F16L 5500
Patent
active
061131547
ABSTRACT:
A pressurized fluid circulating assembly includes a body made of non-metallic, brittle material. At least two apertures formed by internal threads are disposed in the body. First coupling members each include a first externally threaded male portion that can engage the threads of one of the apertures, a second internally threaded female portion and a head with multiple flats. Second coupling members each have an externally threaded male portion that can engage the second threaded portion of one of the first coupling members. A movement-inhibiting member is disposed at a fixed position near at least one flat of each of two of the first coupling members to prevent their rotation. A device may employ a movement-inhibiting member having a size and shape so as to be adapted to be received at a fixed position near at least one flat of each of two of the first coupling members when threaded into engagement with the apertures, thereby preventing rotation of the first coupling members. A method includes rotating to a tightening torque the externally threaded male portions of each of the first coupling members into engagement with the threads of one of the body apertures. The movement-inhibiting member is disposed at a fixed position near at least one flat of each of two of the first coupling members. The externally threaded male portion of each of the second coupling members is threaded into the second internally threaded female portion of one of the first coupling members. Rotation of the first coupling members is prevented by engaging the at least one flat of each of the first coupling members with the movement-inhibiting member.
REFERENCES:
patent: 1914736 (1933-06-01), Coutu
patent: 2489660 (1949-11-01), Mueller
patent: 4420022 (1983-12-01), Landry
patent: 5165731 (1992-11-01), Kimuta
patent: 5205520 (1993-04-01), Walker
patent: 5593279 (1997-01-01), Hayashi
Four page brochure, Impervious Graphite Immersion Plate Heaters, published by American Chemical Systems Inc.
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