Handling: hand and hoist-line implements – Hoistable receptacle – With discharge or loading means
Patent
1999-05-18
2000-10-24
Kramer, Dean J.
Handling: hand and hoist-line implements
Hoistable receptacle
With discharge or loading means
7386463, 13753321, 251333, F16K 132
Patent
active
061355232
ABSTRACT:
A bailer that is substantially leak-free includes an improved valve assembly at its lowermost end. In a first embodiment, a valve body in the form of a hemispherical ball is mounted at the lowermost end of a straight valve stem. The hemispherical ball seats in a valve seat that matches the contour of the hemispherical exterior surface of the ball. In a second embodiment, the valve body and the matching valve seat are both frusto-conical in configuration. In a third embodiment, the valve body and matching valve seat are tapered downwardly to form an elongate, narrow slot. In a variation of each embodiment, a particle-collecting groove is formed in the valve seat so that particulate debris collects in the groove and does not defeat the full seating of the valve body in the matching valve seat. A fourth embodiment adds a guide member to the third embodiment structure to ensure seating of the downwardly tapering valve body in its valve seat. In all embodiments, the valve stem is slideably received within and guided by a central bore formed in a support member that spans the hollow interior of the lowermost end of the bailer.
REFERENCES:
patent: 922986 (1909-05-01), Westaway
patent: 1055385 (1913-03-01), Cahill
patent: 1210487 (1917-01-01), Kaul
patent: 1574809 (1926-03-01), Gilbreath
patent: 2025296 (1935-12-01), McIntyre
patent: 2223936 (1940-05-01), Hart
patent: 2593830 (1952-04-01), Baker
patent: 2678563 (1954-05-01), Parrish
patent: 3796238 (1974-03-01), Roth
patent: 3995658 (1976-12-01), Hager
Kramer Dean J.
Smith Ronald E.
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