Pipe joints or couplings – With means blocking release of holding means – Thread lock
Patent
1995-06-02
1997-02-25
Nicholson, Eric K.
Pipe joints or couplings
With means blocking release of holding means
Thread lock
285259, 285328, 285330, F16L 5500
Patent
active
056053592
ABSTRACT:
Failure of push-to-connect couplings which, for example, connect reinforced hoses to ports in valve bodies is prevented by an anti-rotation collar. The ports have a projecting external hex nut fixed to the valve body. A rigid tube is received within the push-to-connect coupling which in accordance with a first embodiment, has fixed thereon a collar with a pair of arms having flat surfaces which engage opposed flats on the hex nut. In accordance with the second and third embodiments of the invention, the anti-rotation collar has a projection, such as a pin, which is received in a hole fixed in the valve body. The collar has a hexagonal recess therein which receives a hexagonal projection from the rigid tube which prevents rotation of the collar with respect to the tube. In this way, the tube is fixed with respect to the valve body and does not rotate so as to cause failure of a collet within the push-to-connect coupling which radially engages a first portion of the rigid tube to axially retain the rigid tube in the coupling. A second portion of the rigid tube has an end of the reinforced hose fixed thereto by either a crimping collar or a screw thread.
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Dana Corporation
Nicholson Eric K.
Shackelford Heather
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