US3861646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual sealing element valve for oil well pumps
Assignee: Dresser Industries Inc
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Filing: 1972-10-27
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Granted: 1975-01-21
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Expires: 1992-10-27
Abstract
Abstract A valve body is fabricated by injecting rubber through a channel extending along the central longitudinal axis of a cylindrical body having a conical-shaped end portion and out through a pair of transverse channels to form a flexible resilient sealing surface having a flexible lip, the resilient sealing surface being formed at a slightly greater angle than the adjacent metal frusto-conical sealing surface on the body. The central and transverse channels used for injecting the rubber serve as a mechanical lock between the resilient sealing surface and the metal body of the valve. In addition, the resilient sealing surface is chemically bonded to the metal body of the valve. A plastic valve guide having a continuous ring on one end and a centrally oriented guide portion having three arcuate surfaces equally spaced around the circumference of the valve body are arranged such that the valve body can move longitudinally within the valve guide.
Inventors
- 👤 Bobby L Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:11
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/021; B; B29; B29C; B29C45/00; B29C45/14; B29C45/14336; B29C45/14344; F04; F04B; F04B53/00; F04B53/10; F04B53/102; B29C2045/1436; B29C2045/14459; B29L; B29L2031/00; B29L2031/748; B29L2031/7506
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A valve apparatus, comprising: a valve body having an internal flow passageway therein, said passageway being at least partially filled with a resilient material; and a resilient sealing surface on said body, said surface being integral with said resilient material in said passageway; said passageway including a first channel which at least partially coincides with the central longitudinal axis of said valve body and at least one additional channel which runs transverse to said longitudinal axis; said valve body further comprising a dovetail channel around the circumference of said valve body and which is also filled with resilient material integral with said resilient material in said passageway, the exterior surface of said resilient material in said dovetail channel forming said resilient sealing surface.
Claim 2
Dependent Claim
123 words
A valve apparatus, comprising: a valve body having an internal flow passageway therein, said passageway being at least partially filled with a resilient material; and a resilient sealing surface on said body, said surface being integral with said resilient material in said passageway; said passageway including a first channel which at least partially coincides with the central longitudinal axis of said valve body and at least one additional channel which runs transverse to said longitudinal axis; said valve body further comprising a dovetail channel around the circumference of said valve body and which is also filled with resilient material integral with said resilient material in said passageway, the exterior surface of said resilient material in said dovetail channel forming said resilient sealing surface.
Claim 3
Dependent Claim
15 words
The apparatus according to claim 1, wherein said resilient sealing surface is frusto-conical in shape.
Claim 4
Dependent Claim
22 words
The apparatus according to claim 2, including in addition thereto, a frusto-conical, non-resilient sealing surface in juxtaposition to said resilient sealing surface.
Claim 5
Dependent Claim
28 words
The apparatus according to claim 3 wherein the apex angle of the frusto-conical non-resilient sealing surface is less than the apex angle of the frusto-conical resilient sealing surface.
Claim 6
Dependent Claim
90 words
A valve member for use in a flow check valve, said valve member comprising: a rigid valve member body having a rigid frusto-conical sealing end and an elongated portion attached to said sealing end; a frusto-conical resilient sealing member abutting said sealing end and encircling said elongated portion; a circumferential channel formed in said valve member contiguous to said rigid sealing end; and, said resilient sealing surface is formed at a greater angle with the longitudinal axis of said elongated portion than the angle of said rigid sealing surface thereto.
Claim 7
Dependent Claim
90 words
A valve member for use in a flow check valve, said valve member comprising: a rigid valve member body having a rigid frusto-conical sealing end and an elongated portion attached to said sealing end; a frusto-conical resilient sealing member abutting said sealing end and encircling said elongated portion; a circumferential channel formed in said valve member contiguous to said rigid sealing end; and, said resilient sealing surface is formed at a greater angle with the longitudinal axis of said elongated portion than the angle of said rigid sealing surface thereto.
Claim 8
Dependent Claim
47 words
The valve member of claim 5 wherein said resilient sealing means further comprises a circumferential lip formed thereon, said lip forming an annular extension of said resilient sealing surface; and said channel further comprises a dovetail channel having a wider channel bottom than the outer channel dimension.
References Cited (Backward Citations)
US2704650A
Cited
US713052A
Cited
US2414577A
Cited
US2516947A
Cited
US2720219A
Cited
US2568274A
Cited
US2659566A
Cited
US2677149A
Cited
US2995057A
Cited
US3293342A
Cited
US3240379A
Cited
US3326521A
Cited
US3381351A
Cited
US3379214A
Cited
US3356104A
Cited
US3381352A
Cited
US3581365A
Cited
US3459404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |