Title: Composite lip seal for lavatory or sink valve

Abstract: A valve control stem extends through a thick sleeve-like sealing member fitted in a valve body. The sealing member has a short passage linking a body inlet port with the control stem. The passage has an intermediate enlargement forming an atrium or pressure chamber. The chamber forms outer and inner lips which are urged by supply pressure to seal against the valve body on the outside and (in the OFF position) against the control stem on the inside. A ring insert in the atrium provides a mechanical assist positively forcng the lips into sealing position and corrects for any imperfections in the lips that might otherwise prevent initiation of a proper seal. A reliable and effective seal is achieved.

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Inventors: Tolnai, Julius L. (Los Angeles, CA, US)

Application Number: 623436
Filing Date: 1975-10-17
Publication_date: 1977-03-01
Assignee: Price Pfister Brass Mfg. Co. (Pacoima, CA)
Primary Class(es): 251/172 251/174, 277/345
Other Classes:
US Patent Ref:

2901271	Aug, 1959	Zoldak	285/112.
2943838	Jul, 1960	Skei	251/175.
3661181	May, 1972	Palmer et al.	251/175.
3680874	Aug, 1972	Schwarz	285/111.

Other Refs:
Primary Examiner: Weakley, Harold W.
Assistant Examiner:
Attorney: Flam & Flam