Title: Fluid flow control valves

Abstract: A fluid flow control valve having a closure member movable by axial movement of a stem in which sealing means are provided between the valve body and a sleeve covering the part of the stem extending out of the valve body. Preferably the seal is a lip seal on a plastics sleeve secured to the body to provide an opening indicator and a lubricant reservoir.

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Inventors: Cocking, Glyn (Cwmbran, WA, US)
Jones, John Owen (Cwmbran, WA, US)

Application Number: 662130
Filing Date: 1976-02-27
Publication_date: 1977-10-04
Assignee: Saunders Valve Company Limited (WA)
Primary Class(es): 137/556 251/331, 251/355
Other Classes:
US Patent Ref:

2160536	May, 1939	Buning	251/214.
2186833	Jan, 1940	Iler	251/355.
3238968	Mar, 1966	Decis	137/556.
3443789	May, 1969	Glasgow et al.	251/214.
3633874	Jan, 1972	Veugeler, Jr.	251/331.
3802462	Apr, 1974	Trosch	251/331.

Other Refs:
Primary Examiner: Rosenthal, Arnold
Assistant Examiner:
Attorney: Scrivener, Parker, Scrivener & Clarke