Valve stem seal
This patent describes a valve stem seal including an annular elastomeric portion having an internal wall defining and opening therethrough substantially aligned with the boss means opening and the valve guide and receiving the valve stem, the improvement comprising: the elastomeric portion being seated solely on the upper surface of the boss means above the side surface thereof, means associated with an upper section of the elastomeric portion biasing the internal wall into fictional engagement with the valve stem, an annular insert formed of a rigid material relative to the elastomeric portion, the insert and an outer portion of the elastomeric portion being complementarily configured and in interblocking relationship with each other, and retaining means having a central portion, means defining an opening through the central portion and a depending, boss means-engaging portion, and the retaining means being received over the boss means with the boss means-engaging portion in engagement with the boss means side wall and the elastomeric portion and insert captured between the retaining means and the boss means upper surface.
- Assignee:
- Vernay Laboratories, Inc., Yellow Springs, OH
- Patent Number(s):
- US 4811704
- OSTI ID:
- 6101737
- Country of Publication:
- United States
- Language:
- English
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