Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1984-05-17
1985-07-02
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277220, F16J 1508
Patent
active
045263884
ABSTRACT:
A one-piece, self-lubricating thermoplastic sealing ring is disclosed. The sealing ring provides two separate wiping actions on a reciprocating and/or rotating shaft when mounted thereon and can be easily placed on or removed from the shaft without disassembling the entire machine in which the shaft is located. Two radial cuts in oppositely facing radial walls of the ring intersect opposite ends, respectively, of a transverse cut along a circumferential wall of the ring. The three cuts enable the ring to be twisted open and placed around the shaft while both ends of the shaft are fixed in position, then closed about the shaft, before being inserted into a seal housing. A seal ring retainer may be used to control the pressure the seal exerts on the shaft. A cavity, preferably an annularly shaped cavity, in the seal ring, the cuts in the radial walls, and the circumferential wall of the ring also define a leak path through the seal ring which requires fluid leaking into one of the radial cuts to fill the cavity within the seal ring before leaking out of the other radial cut.
REFERENCES:
patent: 1436774 (1922-11-01), Mummert
patent: 1532938 (1925-04-01), Peeler
patent: 2420039 (1947-05-01), Frisby
patent: 2759777 (1956-08-01), Anderson
patent: 2964343 (1960-12-01), Klingler
patent: 3316940 (1967-05-01), Gratzmuller
patent: 3837687 (1974-09-01), Leonard
Perry's Chemical Engineers' Handbook (Fourth Ed., 1963), pp. 6-32 through 6-34.
Dixon Industries Corporation
Smith Robert I.
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