Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1979-07-16
1981-06-30
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 95, 277152, 277179, 305 11, F16J 1532, F16J 1534
Patent
active
042758904
ABSTRACT:
PCT No. PCT/US79/00505 Sec. 371 Date July 16, 1979 Sec. 102(e) Date July 16, 1979 PCT Filed July 16, 1979 PCT Pub. No. WO81/00293 PCT Pub. Date Feb. 5, 1981
A sealing structure (10,110) for use in a joint (11) having a first member (12) axially movable relative to a second member (14). The first member defines a recess (13) receiving the sealing structure which includes an annular seal ring (19,119) having a radially outer annular base portion (20,120) fitted in the recess, a sealing portion (21,121) having a lip (22,122) engaging a surface (15) of the movable member (14) confronting the recess (13). The sealing portion is provided with a stiffener which is bonded or partially encapsulated therein and provided with axially inwardly projecting tongues (30,130) engaged by a spring structure (24,124). In the illustrated embodiment, the spring structure includes one or more Belleville springs (25,26,125) received within the base portion (20,120) of the seal ring and having outer portions (27,127) axially inwardly engaging a flange (32,132) inturned by the axially inner portion of the base. The Belleville springs are arranged to deflect past the flat disposition thereof in the range of movement between the joint members so as to provide an effectively minimum variation in the sealing force applied thereby.
REFERENCES:
patent: 2294105 (1942-08-01), Wallgren
patent: 2736584 (1956-02-01), Riesing
patent: 2736585 (1956-02-01), Riesing
patent: 2797944 (1957-07-01), Riesing
patent: 2830858 (1958-04-01), Moorman et al.
patent: 3614113 (1971-10-01), Burk
Caterpillar Tractor Co.
Ward, Jr. Robert S.
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