Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1990-11-02
1992-02-18
Yasich, Daniel M.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 27, 277 58, 277177, 277201, F16J 1516, F16K 4100
Patent
active
050887459
ABSTRACT:
Buffer seal rings are described, and gland seals using them. The ring seats in an axially oversize housing groove in the gland bore in order to protect a main rod seal from pressure shocks. To avoid the possibly damaging effects of pressure trapping between the rod seal and buffer seal, the buffer seal has a sealing face on the rod seal side which includes a recessed driving surface e.g. an annular channel, lying inside an annular sealing portion. The driving surface communicates with the fluid in the bore through communication recesses, e.g. slots in an inner support rib, so that excess pressure on that side can drive the ring axially out of sealing and allow the pressure to be relieved through axially-extending pressure release grooves around the edge and oppostie face of the ring.
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Chambers Paul C.
Peppiatt Nicholas A.
Folker James K.
Hallite Seals International Limited
Yasich Daniel M.
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