Boring or penetrating the earth – With tool shaft detail
Patent
1992-09-25
1994-02-08
Bui, Thuy M.
Boring or penetrating the earth
With tool shaft detail
285140, E21B 1700
Patent
active
052842142
ABSTRACT:
The pipe coupling in accordance with the present invention broadly includes an elongated female member having structure defining a bore spanning the length thereof, a first hollow elongated male member having an end portion non-rotatably affixed within a portion of the bore, a second elongated male member slidably engagable within the remaining portion of the bore, a lock pin slidably engagable through aligned apertures in the female and second male members, and a pliable gasket for placement between the first and second male members. The second male member also includes structure defining a passage spanning its length and presenting an inlet and an outlet wherein the passage diverges into two passages on the inlet side of the aperture and converges back into one passage on the outlet side of the aperture. Preferably, the matable ends of the first and second male members are concave and convex, respectively, which cooperate to compress the gasket to provide a fluid-tight seal between the male members when the second male member is locked into the female member.
REFERENCES:
patent: 221153 (1879-11-01), Chapin
patent: 1658264 (1926-03-01), Sutton et al.
patent: 4199033 (1980-04-01), Van Gundy, Jr.
patent: 4378057 (1983-03-01), O'Connell
patent: 4423778 (1984-01-01), Goldsmith
patent: 4615545 (1986-10-01), Cruse
patent: 5050691 (1991-09-01), Moses
patent: 5125148 (1992-06-01), Krasnov
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