Pipe joint reducing required tightening force, including a...

Details Pipe joint reducing required tightening force, including a... Pipe joint reducing required tightening force, including a...

2005-01-11

2005-01-11

Hewitt, James M. (Department: 3679)

Pipe joints or couplings

Packed

Wedge

C285S353000, C285S354000, C285S342000

Reexamination Certificate

active

06840550

ABSTRACT:
A pipe joint for joining a tubular component (1) to a receiving piece (2), the pipe joint comprising a fitting body (3) having a recess (8), a tightening nut (6a) having a first thread (7a), the fitting body having a corresponding thread (4), and a cutting ring (9) being arranged to be pressed between a wedge-like wall portion (10) of the recess, and the tubular component when the tightening nut is tightened. In order that the pipe joint could be tightened to form a leak-proof and strong joint using low torque, which enables the use of small tools applicable in confined spaces, the pipe joint comprises a supplementary nut (6b) having a thread (7c) whose handedness corresponds to that of the first thread (7a) but is smaller, the tightening nut comprising a second thread (7b) corresponding to that of the supplementary nut.

REFERENCES:
patent: 1872536 (1932-08-01), Weatherhead, Jr.
patent: 2313323 (1943-03-01), Cowies
patent: 2320812 (1943-06-01), Cowles
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patent: 4836584 (1989-06-01), Baker
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patent: 4141841 (1993-03-01), None
patent: 2163227 (1986-02-01), None
patent: 149786 (1984-03-01), None
patent: 8503339-7 (1989-06-01), None

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