Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1995-08-25
1996-10-29
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277212FB, 403134, F16J 900, F16D 112
Patent
active
055689302
ABSTRACT:
A ball joint assembly (10) includes a housing (12) having a socket chamber (14) in which a ball end portion (18) of a movable stud member (16) is disposed. A shank portion (22) of the movable stud member (16) extends from the housing (12). An improved boot seal assembly (40) includes a flexible seal wall (48) having an inner end portion (50) which engages the housing (12) and an outer end portion (54) which engages the shank portion (22) of the stud member (16). The seal wall (48) cooperates with the housing (12) and the stud member (16) to form a chamber (42) in which lubricant (44) is disposed. A vent opening (70) is provided in the outer end portion (54) of the seal wall (48). A retainer ring (62) blocks the vent opening (70) in the outer end portion (54) of the seal wall (48) when the lubricant pressure in the chamber (42) is less than a predetermined pressure. When the lubricant pressure in the chamber (42) exceeds the predetermined pressure, the retainer ring (62) and the outer end portion (54) of the seal wall (48) move relative to each other under the influence of the lubricant pressure to vent pressure from the chamber (42) through the vent opening (70).
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DePumpo Daniel G.
TRW Inc.
LandOfFree
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