US3734458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: Kerotest Manufacturing Corp
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Filing: 1971-05-11
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Granted: 1973-05-22
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Expires: 1991-05-11
Abstract
Abstract The gate valve has a body portion with coaxial inlet and outlet openings in the side walls and valve body chamber with opposed converging valve seats. A wedge member has a body portion with a depending wedge shaped gate portion that is movable vertically into a valve chamber within the body portion to control the flow of fluid through the valve body portion. A cover member is secured to the upper face of the valve body and has an elongated chamber communicating with the valve chamber in which the wedge member moves vertically. A guide pin and valve stem are positioned within a cover chamber in spaced parallel relation to each other and on opposite sides of the longitudinal axis of the gate portion of the wedge member. The wedge member body portion has a longitudinal passageway on one side of the gate portion through which the guide pin extends. The wedge member body portion has a second vertical threaded passageway on the other side of the wedge member gate portion through which the threaded valve stem extends. Rotation of the valve stem moves the wedge member vertically within the chamber of the cover in a manner that the gate portion of the wedge control the flow of fluid through the valve body chamber. The valve body, because of the offset stem configuration, is relatively short in length and may be positioned between closely adjacent pipe flanges.
Inventors
- 👤 J Tricini
- 👤 E Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:15
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/12; F16K31/00; F16K31/44; F16K31/50; F16K31/508
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
194 words
A gate valve comprising, a valve body having fluid inlet and outlet openings with a valve chamber therebetween, a wedge member having a body portion with a gate portion depending therefrom, said gate portion arranged to move vertically in said valve chamber and control the flow of fluid therethrough, a cover member positioned on said valve body, said cover member having a chamber therein to receive said wedge member, said wedge member body portion having a first vertical passageway therethrough spaced laterally on one side of said gate portion, a guide pin mounted vertically in said valve cover member chamber and extending through said wedge member body portion, said guide pin terminating above said valve chamber, said guide pin arranged to guide said wedge member at a location remote from said valve chamber, said wedge member body portion having a second threaded vertical passageway therethrough spaced lateRally on the other side of said gate portion, and a valve stem mounted vertically in said chamber and extending through said second threaded vertical passageway, said valve stem operable upon rotation to move said wedge member vertically and control the flow of fluid through said valve body.
Claim 2
Dependent Claim
194 words
A gate valve comprising, a valve body having fluid inlet and outlet openings with a valve chamber therebetween, a wedge member having a body portion with a gate portion depending therefrom, said gate portion arranged to move vertically in said valve chamber and control the flow of fluid therethrough, a cover member positioned on said valve body, said cover member having a chamber therein to receive said wedge member, said wedge member body portion having a first vertical passageway therethrough spaced laterally on one side of said gate portion, a guide pin mounted vertically in said valve cover member chamber and extending through said wedge member body portion, said guide pin terminating above said valve chamber, said guide pin arranged to guide said wedge member at a location remote from said valve chamber, said wedge member body portion having a second threaded vertical passageway therethrough spaced lateRally on the other side of said gate portion, and a valve stem mounted vertically in said chamber and extending through said second threaded vertical passageway, said valve stem operable upon rotation to move said wedge member vertically and control the flow of fluid through said valve body.
Claim 3
Dependent Claim
63 words
A gate valve as set forth in claim 1 in which, said wedge member gate portion having a vertical axis, said cover member having a top wall with a guide pin recessed portion on one side of said gate portion vertical axis, said cover member top wall having a valve stem passageway therethrough on the other side of said gate portion vertical axis.
Claim 4
Dependent Claim
64 words
A gate valve as set forth in claim 2 in which, said valve body having a pair of spaced side walls and a top wall, said top wall having a guide pin recessed portion therein on one side of said gate portion vertical axis, said top wall having a valve stem recessed portion therein on the other side of said gate portion vertical axis.
Claim 5
Dependent Claim
80 words
A gate valve as set forth in claim 3 in which, said wedge member body portion is positioned in said cover member chamber, said guide pin having end portions positioned in said guide pin recessed portions in said valve body portion and said cover member to wall, said valve stem having one end portion positioned in said valve body valve stem recessed portion and the other end portion extending through said valve stem passageway in said cover member top wall.
Claim 6
Dependent Claim
36 words
A gate valve as set forth in claim 1 in which, said guide pin and said valve stem are arranged in parallel spaced relation to each other on opposite sides of said wedge member gate portion.
Claim 7
Dependent Claim
54 words
A gate valve as set forth in claim 4 which includes, a thrust washer positioned on said valve stem and abutting said cover member top wall, said thrust washer having an annular seal member extending around said valve stem, said thrust washer operable to abut said wedge body portion in a valve open position.
Claim 8
Dependent Claim
49 words
A gate valve as set forth in claim 4 which includes, a seal member positioned in a receiving portion of said cover member valve stem passageway and extending around said valve stem, a gland member engaging said seal member and maintaining said seal member within said valve stem passageway.
Claim 9
Dependent Claim
26 words
A gate valve as set forth in claim 1 in which, said valve body has a length substantially less than the circumference of said valve body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |