Pipe joints or couplings – With leakage or drip disposal
Patent
1983-06-10
1985-12-17
Callaghan, Thomas F.
Pipe joints or couplings
With leakage or drip disposal
285 94, 285136, 285DIG18, F16C 3904
Patent
active
045588902
ABSTRACT:
A multi-port hydraulic swivel joint (10) in which a high pressure flow channel (34) is located adjacent an enclosed end (15a) of the swivel joint, the pressure in the return line is maintained at a low level to provide low pressure fluid which is transmitted through a flow channel (37) adjacent to an open end of the swivel joint, and the return flow channel (36) is located between the other two. A passageway (43) communicates fluid which has seeped to a cavity between the high pressure flow channel and the enclosed end to the return flow channel (36), a raceway (44) with steel balls (46) resist forces tending to separate the stator (30) and rotor (40) of the swivel joint, and a lip seal (49) with grease packing seals the low pressure flow channel (37) from the open end (15) of the swivel joint. In another mode an extension (39e) of L-shaped passageway (39b), through which return flow channel (36) delivers fluid received from the motor to reservoir, communicates between the cavity adjacent the enclosed end and return flow channel (36).
REFERENCES:
patent: 1497652 (1924-06-01), Browne
patent: 2210088 (1940-08-01), Longfield
patent: 2343491 (1944-03-01), Bard et al.
patent: 2536565 (1951-11-01), Ostergren
patent: 2768843 (1956-10-01), Zeilman
patent: 3477746 (1969-11-01), Watson
patent: 3698433 (1972-10-01), Dobler
patent: 3776270 (1973-12-01), Wanger
patent: 4101148 (1978-07-01), Lee
patent: 4142084 (1979-02-01), Torrani
patent: 4186763 (1980-02-01), Ferguson
patent: 4405162 (1983-09-01), Williams
Callaghan Thomas F.
Newman E. Robert
Pickle Creek Mfg., Inc.
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