Patent US3857546A successfully refreshed from Google Patents.
US3857546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve with filament wound body
Assignee: Valve Systems International Inc
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Filing: 1971-07-23
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Granted: 1974-12-31
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Expires: 1991-07-23
Abstract
Abstract A ball-type valve wherein the ball and its actuating stem, and the ball and stem seals, are enclosed by a valve body formed by winding a resin-impregnated filament around the ball, stem and seals and around a mandrel carrying the ball. The windings are preferably roving and/or tape of fiber glass. A suitable parting agent is used to prevent bonding of the valve body to the ball and stem, and to the seals if necessary. Preferably, the parting agent is a membrane which also serves to prevent weeping of the fluid flowing through the valve in use. Such a membrane may be a heat shrinkable thermoplastic shrunk onto the ball, stem and seals, such a membrane serving not only as a parting agent and as a weep barrier, but also as a means for holding the seals in place.
Inventors
- 👤 R Quirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:49
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0689; F16K27/00; F16K27/06; F16K27/067; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
A ball-type valve comprising a valve body having a flow passage extending therethrough and having a laterally extending neck portion, a generally spherical ball having a flow passage extending therethrough and terminating in ports at the circumference of the ball, a stem connected to said ball and having a constant-diameter portion projecting laterally of said valve body through said neck portion thereof, a pair of annular ball seals embedded in said valve body in contact with said ball and surrounding the interior junctions of the flow passage of said valve body with said ball, an annular stem seal embedded in said neck portion of said valve body and encircling said stem, said valve body, including said neck portion thereof, comprising a plurality of layers of a resin-impregnated filament wound around said ball and around said ball and stem seals, and a membrane enclosing said ball, said stem, and said ball and stem seals, and over which filament is wound.
Claim 2
Dependent Claim
159 words
A ball-type valve comprising a valve body having a flow passage extending therethrough and having a laterally extending neck portion, a generally spherical ball having a flow passage extending therethrough and terminating in ports at the circumference of the ball, a stem connected to said ball and having a constant-diameter portion projecting laterally of said valve body through said neck portion thereof, a pair of annular ball seals embedded in said valve body in contact with said ball and surrounding the interior junctions of the flow passage of said valve body with said ball, an annular stem seal embedded in said neck portion of said valve body and encircling said stem, said valve body, including said neck portion thereof, comprising a plurality of layers of a resin-impregnated filament wound around said ball and around said ball and stem seals, and a membrane enclosing said ball, said stem, and said ball and stem seals, and over which filament is wound.
Claim 3
Dependent Claim
140 words
A ball-type valve comprising a valve body having a flow passage extending therethrough, a generally spherical ball having a flow passage extending therethrough and terminating in ports at the circumference of the ball, a stem connected to said ball and projecting laterally of said valve body, a pair of annular ball seals mounted within said valve body in contact with said ball and surrounding the interior junctions of the flow passage of said valve body with said ball, said valve body comprising a plurality of layers of a resin-impregnated filament wound around said ball and said seals and around the junction of said stem with said ball, and a membrane which is located between said valve body and said ball and over which said filament is wound, said membrane being shrunk onto said ball, said stem and said ball seals.
Claim 4
Dependent Claim
140 words
A ball-type valve comprising a valve body having a flow passage extending therethrough, a generally spherical ball having a flow passage extending therethrough and terminating in ports at the circumference of the ball, a stem connected to said ball and projecting laterally of said valve body, a pair of annular ball seals mounted within said valve body in contact with said ball and surrounding the interior junctions of the flow passage of said valve body with said ball, said valve body comprising a plurality of layers of a resin-impregnated filament wound around said ball and said seals and around the junction of said stem with said ball, and a membrane which is located between said valve body and said ball and over which said filament is wound, said membrane being shrunk onto said ball, said stem and said ball seals.
Claim 5
Dependent Claim
15 words
A ball-type valve according to claim 2 wherein said membrane is a heat shrunk thermoplastic.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |