US3567178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stem packing and bearing assembly
Assignee: Cooper Industries LLC
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Filing: 1969-09-29
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Granted: 1971-03-02
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Expires: 1989-09-29
Abstract
Abstract A valve stem packing and bearing assembly for plug valves having a rotatable valve stem for inducing actuation of an internal valve element between the open and closed positions thereof. The body of the valve is provided with a stem passage having an internal restriction defined by an annular internal flange. A rotatable valve stem having a shoulder defined at the lower portion thereof extends through the stem passage. A pair of annular sealing members are disposed within the stem passage, one on either side of the annular internal flange and serve to establish seals between the valve stem and the stem passage portion of the valve body and to serve as thrust bearings. The sealing members are deformed upon assembly from originally flat cross-sectional configuration to a tapered configuration that causes pressure acting from within the valve to urge both of the seals in a direction tending to increase the sealing ability thereof.
Inventors
- 👤 Norman A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:34
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0694; F16K5/08; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
A plug valve comprising a valve body defining a valve chamber and having inlet and outlet passages dispose in communication with a valve chamber, a rotatable valve element having a flow passage extending therethrough, said valve element being rotatable from an open position where said flow passage is disposed in fluid registry with said inlet and outlet passages to a closed position where said inlet and outlet passages are closed by said plug member, seat means disposed within said valve chamber and establishing sealing engagement with said plug member and valve body, a stem passage extending through said valve body, said valve body defining a support flange within said passage, a pair of bearing and sealing elements disposed one on either side of said support flange, an enlargement defined on said stem disposed in bearing engagement with one of said bearing and sealing members, a packing adjustment member secured to said valve stem and engaging the other of said bearing and sealing members, means mechanically interlocking said valve stem and one of said bearing and sealing element to cause rotation of said one of said bearing and sealing elements with said valve stem.
Claim 2
Dependent Claim
193 words
A plug valve comprising a valve body defining a valve chamber and having inlet and outlet passages dispose in communication with a valve chamber, a rotatable valve element having a flow passage extending therethrough, said valve element being rotatable from an open position where said flow passage is disposed in fluid registry with said inlet and outlet passages to a closed position where said inlet and outlet passages are closed by said plug member, seat means disposed within said valve chamber and establishing sealing engagement with said plug member and valve body, a stem passage extending through said valve body, said valve body defining a support flange within said passage, a pair of bearing and sealing elements disposed one on either side of said support flange, an enlargement defined on said stem disposed in bearing engagement with one of said bearing and sealing members, a packing adjustment member secured to said valve stem and engaging the other of said bearing and sealing members, means mechanically interlocking said valve stem and one of said bearing and sealing element to cause rotation of said one of said bearing and sealing elements with said valve stem.
Claim 3
Dependent Claim
27 words
A plug valve as recited in claim 1, said bearing and sealing members being originally of flat configuration and being deformed upon assembly to a tapered configuration.
Claim 4
Dependent Claim
45 words
A plug valve according to claim 1, said valve stem being threaded, said bearing and sealing members being received about said valve stem, the inner periphery of at least one of said bearing and sealing members being deformed into the threads of said valve stem.
Claim 5
Dependent Claim
71 words
A plug valve according to claim 1, one of said bearing and sealing elements upon being assembled having a greater external peripheral thickness than the internal peripheral thickness thereof, the other of said bearing and sealing members having a greater internal peripheral thickness than the external peripheral thickness thereof, whereby both of said bearing and sealing elements are pressure actuated by pressure within the valve to enhance the sealing ability thereof.
Claim 6
Dependent Claim
133 words
A valve comprising a valve body having a rotatable valve element disposed therein and being rotatable between open and closed positions, a valve stem passage formed in said valve body said valve body having a support flange defining a restriction in said valve stem passage, inner and outer annular bearing and sealing elements disposed one on either side of said support flange, and partially threaded valve stem extending through said valve stem passage and having an annular flange disposed in engagement with the inner one of said bearing and sealing elements, a packing retainer member retained by said valve stem and having a surface thereof disposed in engagement with the outer one of said bearing and sealing elements, the outer one of said bearing and sealing elements being rotatable with said valve stem.
Claim 7
Dependent Claim
133 words
A valve comprising a valve body having a rotatable valve element disposed therein and being rotatable between open and closed positions, a valve stem passage formed in said valve body said valve body having a support flange defining a restriction in said valve stem passage, inner and outer annular bearing and sealing elements disposed one on either side of said support flange, and partially threaded valve stem extending through said valve stem passage and having an annular flange disposed in engagement with the inner one of said bearing and sealing elements, a packing retainer member retained by said valve stem and having a surface thereof disposed in engagement with the outer one of said bearing and sealing elements, the outer one of said bearing and sealing elements being rotatable with said valve stem.
Claim 8
Dependent Claim
66 words
A valve as characterized in claim 5, the inner one of said bearing and sealing elements being of greater exterior peripheral thickness than the interior peripheral thickness thereof, the outer one of said bearing and sealing elements being of greater interior peripheral thickness than the exterior peripheral thickness thereof, whereby pressure within the valve will develop forces against both sealing elements enhancing the sealing ability thereof.
Claim 9
Dependent Claim
51 words
A valve as set forth in claim 5, the outer one of said bearing and sealing elements being mechanically interlocked with said packing adjustment member whereby said outer bearing and sealing element wIll rotate with said valve stem and packing adjustment member upon opening and closing movements of said valve stem.
Claim 10
Dependent Claim
64 words
A valve as recited in claim 5, said valve stem being threaded, said packing retainer member being retained by said threads, said outer bearing and sealing element being deformed upon assembly causing the inner peripheral portion thereof to be interlocked with the threads of said valve stem whereby said upper sealing element is rotated with said stem upon opening and closing of said valve.
Claim 11
Dependent Claim
42 words
A valve as set forth in claim 8, said packing retainer member having surface irregularities on the lower surface thereof, said outer sealing element being deformed upon installation thereof interlocking the upper sealing element with the surface irregularities of said retainer member.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |