US3851853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Crane Instrumentation and Sampling Inc
•
Filing: 1973-04-23
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Granted: 1974-12-03
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Expires: 1993-04-23
Abstract
Abstract A fluid flow control valve is disclosed having an improved stem mounting and packing means. Fluid flow between spaced ports in the valve body is controlled by a stem which is adjustably mounted in the valve body by threaded engagement with a stem guide. The stem guide is received in sliding engagement within the valve body with the stem guide bottom engaging and loading a wafer stem packing. A threaded packing nut holds the sliding stem guide in place within the valve body and adjustably loads the wafer stem packing by forcing the stem guide downwardly against the packing. Rotation of the stem guide with respect to the valve body is prevented by a pin which engages an elongated slot in the stem guide.
Inventors
- 👤 W Teeters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/04; F16K41/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
176 words
In a fluid control valve having a body with spaced inlet and outlet ports coupled by a conduit including a valve stem seat and having a stem mounting cavity communicating with said conduit an improved valve stem assembly comprising: a stem with a sealing means for engaging said seat at the inner end of said stem and control threads on a portion of said stem intermediate its inner and outer ends, a stem guide slidably positioned in said stem mounting cavity and having a threaded aperture engaging the threaded portion of said stem, means on said guide for preventing relative rotation of said guide in said body, a stem packing positioned between said guide and said body inwardly of the stem control threads and in sealing engagement with said stem, and a packing nut threadedly coupled to said body and having an exposed tool engaging portion outwardly of said body and holding said stem guide in said body and urging said stem guide against said packing thereby compressing said packing into sealing engagement with said stem.
Claim 2
Dependent Claim
176 words
In a fluid control valve having a body with spaced inlet and outlet ports coupled by a conduit including a valve stem seat and having a stem mounting cavity communicating with said conduit an improved valve stem assembly comprising: a stem with a sealing means for engaging said seat at the inner end of said stem and control threads on a portion of said stem intermediate its inner and outer ends, a stem guide slidably positioned in said stem mounting cavity and having a threaded aperture engaging the threaded portion of said stem, means on said guide for preventing relative rotation of said guide in said body, a stem packing positioned between said guide and said body inwardly of the stem control threads and in sealing engagement with said stem, and a packing nut threadedly coupled to said body and having an exposed tool engaging portion outwardly of said body and holding said stem guide in said body and urging said stem guide against said packing thereby compressing said packing into sealing engagement with said stem.
Claim 3
Dependent Claim
41 words
A control valve as claimed in claim 1 in which said stem packing comprises a spacer member engaging said stem guide and a retainer engaging said valve body, a packing ring positioned between and compressed by said spacer and said retainer.
Claim 4
Dependent Claim
41 words
A control valve as claimed in claim 2 which further comprises a retainer ring mounted in a groove on said stem adjacent to the stem sealing means, and said retainer having a downwardly and outwardly flared surface facing said retainer ring.
Claim 5
Dependent Claim
50 words
A control valve as claimed in claim 1 in which said stem packing comprises a spacer member engaging said stem guide and a retainer engaging said valve body, a plurality of packing rings positioned between and compressed by said spacer and said retainer, and a spacer between adjacent packing rings.
Claim 6
Dependent Claim
23 words
The control valve as claimed in claim 4 in which said packing rings comprise Teflon and said spacer comprises a relatively harder material.
Claim 7
Dependent Claim
42 words
A control valve as claimed in claim 1 in which the means for preventing relative rotation of said stem guide in said body comprises an elongated slot in said guide, and a pin mounted in said body and projecting into said slot.
Claim 8
Dependent Claim
23 words
A control valve as claimed in claim 1 in which said stem sealing means comprises a conical point rotatably mounted on said stem.
Claim 9
Dependent Claim
234 words
In a fluid control valve having a body with spaced inlet and outlet ports coupled by a conduit including a valve stem seat and having a stem mounting cavity communicating with said conduit an improved valve stem assembly comprising: a stem with a sealing means for engaging said seat at the inner end of said stem and control threads on a portion intermediate its inner and outer ends, a stem guide slidably positioned in said stem mounting cavity and having a threaded aperture engaging the threaded portion of said stem, means on said guide for preventing relative rotation of said guide in said body, a stem packing positioned between said guide and said body and in sealing engagement with said stem, said stem packing positioned inwardly of the stem control threads comprising a circular spacer member surrounding said stem and engaging said stem guide and a retainer surrounding said stem and engaging said valve body and a plurality of packing rings positioned between and compressed by said spacer and said retainer, and spacer rings positioned between adjacent packing rings formed of a harder material than said packing rings, and a packing nut threadedly cOupled to said body and having an exposed tool engaging portion outwardly of said body and holding said stem guide in said body and urging said stem guide against said packing thereby compressing said packing into sealing engagement with said stem.
Claim 10
Dependent Claim
234 words
In a fluid control valve having a body with spaced inlet and outlet ports coupled by a conduit including a valve stem seat and having a stem mounting cavity communicating with said conduit an improved valve stem assembly comprising: a stem with a sealing means for engaging said seat at the inner end of said stem and control threads on a portion intermediate its inner and outer ends, a stem guide slidably positioned in said stem mounting cavity and having a threaded aperture engaging the threaded portion of said stem, means on said guide for preventing relative rotation of said guide in said body, a stem packing positioned between said guide and said body and in sealing engagement with said stem, said stem packing positioned inwardly of the stem control threads comprising a circular spacer member surrounding said stem and engaging said stem guide and a retainer surrounding said stem and engaging said valve body and a plurality of packing rings positioned between and compressed by said spacer and said retainer, and spacer rings positioned between adjacent packing rings formed of a harder material than said packing rings, and a packing nut threadedly cOupled to said body and having an exposed tool engaging portion outwardly of said body and holding said stem guide in said body and urging said stem guide against said packing thereby compressing said packing into sealing engagement with said stem.
Claim 11
Dependent Claim
41 words
A control valve as claimed in claim 8 which further comprises a ring retainer mounted in a groove on said stem adjacent to the stem sealing means, and said retainer having a downwardly and outwardly flared surface facing said ring retainer.
Claim 12
Dependent Claim
42 words
A control valve as claimed in claim 8 in which the means for preventing relative rotation of said stem guide in said body comprises an elongated slot in said guide and a pin mounted in said body and projecting into said slot.
Claim 13
Dependent Claim
23 words
A control valve as claimed in claim 8 in which said stem sealing means comprises a conical point rotatably mounted on said stem.
Claim 14
Dependent Claim
15 words
A control valve as claimed in claim 8 in which said packing rings comprise Teflon.
References Cited (Backward Citations)
US682688A
Cited
US1502734A
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US2194262A
Cited
US2309338A
Cited
US3237917A
Cited
US3559950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |