Pipe joints or couplings – Molded joint – Interlocked
Patent
1994-02-07
1995-08-08
Nicholson, Erik K.
Pipe joints or couplings
Molded joint
Interlocked
228132, 285287, F16L 1308, B23K10104
Patent
active
054392578
ABSTRACT:
The present invention is a brazed fitting suitable for use as a hydraulic coupling for pressurized fluids. In the first embodiment, the male component has a tapered surface which mates and creates an interface with a similarly tapered surface of a female component. A brazing material is heated to diffuse and alloy within the interface, forming a connection between the surface portions which is stronger than the metal being connected. A groove on the male component retains the brazing material within the surface portions so that after the components are joined in an interference fit, the assembly is heated and the brazing material melts within the interface and connects together the mating surface by diffusing and alloying. The counterbore of the female component does not require a base, and the resulting structure has improved fluid flow characteristics. In the second embodiment, the male component is generally cylindrical and the female component has a bore with a first aligning portion having a greater diameter than the male components, a second mating portion with approximately the same diameter, and a third guiding portion having a tapered surface connecting the first and second portions. The male portion is first positioned and aligned in the first portion before being pressed and creating an interference fit in the second portion before brazing. In the third embodiment, a tube is used as the male component which is pressed into the bore as in the second embodiment, but with the second portion of the bore having a shoulder portion for abutting the end of the tube.
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Nicholson Erik K.
NWD International Inc.
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