Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1976-11-02
1978-03-21
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 25, 277 962, 277133, F16J 1540, F16J 1554
Patent
active
040799476
ABSTRACT:
A liquid sealing device, for inhibiting passage of liquid between a rotatably mounted shaft and an aperture through which the shaft extends with working clearance, including an annular shoulder projecting from the shaft, means adjacent the shaft formed with a cylindrical bore in which the shoulder is rotatable with working clearance, a helical groove extending around the periphery of the annular shoulder, and closure means for the bore adjacent one end of said annular shoulder, said closure means defining said aperture through which the shaft extends with working clearance, whereby rotation of the shaft in a given direction will cause the helical groove to resist the passage of liquid between the annular shoulder and the bore, and will enable the annular shoulder and closure means to co-operate and thereby inhibit passage through the clearance between the shaft and the aperture of any residual liquid which overcomes the resistance of the helical groove.
REFERENCES:
patent: 2347953 (1944-05-01), Katcher
patent: 2571352 (1951-10-01), Fast
patent: 2699345 (1955-01-01), Bales
patent: 3055666 (1962-09-01), Moreno
patent: 3468548 (1969-09-01), Webb
patent: 3608910 (1971-09-01), Tyler
patent: 3778070 (1973-12-01), Shimura
patent: 3791657 (1974-02-01), Bilski
R. A. Lister & Company Limited
Smith Robert I.
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