US3746301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stem friction device
Assignee: Weatherhead Co
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Filing: 1970-11-20
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Granted: 1973-07-17
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Expires: 1990-11-20
Abstract
Abstract A braking and locking structure for frictionally supporting a shaft, such as a valve stem, for axial and rotational movement in a housing comprising a cylindrical surface on the periphery of the shaft, a friction sleeve in frictional engagement with the cylindrical surface and axially located between abutment washers in the housing. The friction sleeve is plastically deformed in a radially outward direction for engagement with the cylindrical surface with a frictional force independent of the actual amount of radial deformation from its original nominal size and, additionally, the sleeve is provided with an axially extending lip plastically deformed to allow the sleeve to assume a length equal to the spacing between the abutment washers determined by the dimension of various components to eliminate axial lost motion of the friction sleeve.
Inventors
- 👤 T Budzich
- 👤 F Browne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:25
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/10; F16B21/20; F16K; F16K1/00; F16K1/32; F16K31/00; F16K31/44; F16K31/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A valve comprising a valve body, a flow passage through said valve body, a valve seat in said valve body around said passage, a valve member adapted to engage said valve seat and movable in said valve body to and from said valve seat to control the effective opening in said flow passage, said valve member having a valve stem threadedly engaged in said valve body, said valve stem having a smooth cylindrical portion axially outwardly of said portion in threaded engagement with said valve body, sealing means to provide a fluid tight seal between said valve body and said valve stem on said smooth cylindrical portion, a friction sleeve carried on said smooth cylindrical portion, said friction sleeve being axially spaced from said sealing means and in frictional engagement with said cylindrical portion to resist axial movement of said sleeve with respect to said valve stem, and abutment means carried by said valve body on each end of said friction sleeve, and engageable with the ends of said sleeve whereby frictional resistance against movement of said valve stem in said valve body is provided by the axial loading produced on the threaded engagement between said valve stem and said valve body, and by the frictional force required to move said friction sleeve axially along said smooth cylindrical portion.
Claim 2
Dependent Claim
219 words
A valve comprising a valve body, a flow passage through said valve body, a valve seat in said valve body around said passage, a valve member adapted to engage said valve seat and movable in said valve body to and from said valve seat to control the effective opening in said flow passage, said valve member having a valve stem threadedly engaged in said valve body, said valve stem having a smooth cylindrical portion axially outwardly of said portion in threaded engagement with said valve body, sealing means to provide a fluid tight seal between said valve body and said valve stem on said smooth cylindrical portion, a friction sleeve carried on said smooth cylindrical portion, said friction sleeve being axially spaced from said sealing means and in frictional engagement with said cylindrical portion to resist axial movement of said sleeve with respect to said valve stem, and abutment means carried by said valve body on each end of said friction sleeve, and engageable with the ends of said sleeve whereby frictional resistance against movement of said valve stem in said valve body is provided by the axial loading produced on the threaded engagement between said valve stem and said valve body, and by the frictional force required to move said friction sleeve axially along said smooth cylindrical portion.
Claim 3
Dependent Claim
53 words
A valvE as set forth in claim 1 wherein said friction sleeve is longitudinally split along only one side and is otherwise circumferentially continuous to grip said smooth cylindrical portion with a force produced by the elastic deformation of said sleeve by the radial expansion of said sleeve on said smooth cylindrical portion.
Claim 4
Dependent Claim
64 words
A valve as set forth in claim 1 wherein said friction sleeve is circumferentially continuous and plastically deformed by the engagement between said sleeve and said smooth cylindrical portion of said valve stem whereby the frictional engagement between said sleeve and said smooth cylindrical portion is substantially independent of the amount of radial expansion of said sleeve when assembled on said smooth cylindrical portion.
Claim 5
Dependent Claim
74 words
A valve as set forth in claim 1 wherein said friction sleeve includes an axially extending lip engageable with and plastically deformed by said abutment means to substantially eliminate axial play between said friction sleeve and said abutment means whereby the axial friction forces between said valve stem and said housing are operable without noticeable loss of motion regardless of the direction of the helical motion between said valve stem and said valve body.
Claim 6
Dependent Claim
56 words
A valve as set forth in claim 1 wherein said abutment means includes friction abutment rings at each end of said friction sleeve whereby frictional resistance against movement of said valve stem in said valve body is provided by frictional engagement with one end of said sleeve with the adjacent one of said friction abutment rings.
Claim 7
Dependent Claim
262 words
A valve comprising a valve body, a flow passage through said valve body, a valve seat in said valve body around said passage, a valve member adapted to engage said valve seat and movable in said valve body to and from said valve seat to control the effective opening in said flow passage, said valve member having a valve stem threadedly engaged in said valve body, said valve stem having a smooth cylindrical portion axially outwardly of said portion in threaded engagement with said valve body, sealing means to provide a fluid tight seal between said valve body and said valve stem on said smooth cylindrical portion, a friction sleeve carried on said smooth cylindrical portion in frictional engagement therewith to resist axial movement of said sleeve with respect to said valve stem, and friction abutment rings carried by said valve body, one on each end of said friction sleeve, and engageable with the ends of said sleeve whereby the frictional resistance against movement of said valve stem in said valve body is provided by the frictional engagement with one end of said sleeve with the adjacent one of said friction abutment rings, by the axial loading produced on the threaded engagement between said valve stem and said valve body, and by the frictional force required to move said friction sleeve axially along said smooth cylindrical portion, said friction sleeve being longitudinally split to grip said smooth cylindrical portion with a force produced by the elastic deformation of said sleeve by the radial expansion of said sleeve on said smooth cylindrical portion.
Claim 8
Dependent Claim
262 words
A valve comprising a valve body, a flow passage through said valve body, a valve seat in said valve body around said passage, a valve member adapted to engage said valve seat and movable in said valve body to and from said valve seat to control the effective opening in said flow passage, said valve member having a valve stem threadedly engaged in said valve body, said valve stem having a smooth cylindrical portion axially outwardly of said portion in threaded engagement with said valve body, sealing means to provide a fluid tight seal between said valve body and said valve stem on said smooth cylindrical portion, a friction sleeve carried on said smooth cylindrical portion in frictional engagement therewith to resist axial movement of said sleeve with respect to said valve stem, and friction abutment rings carried by said valve body, one on each end of said friction sleeve, and engageable with the ends of said sleeve whereby the frictional resistance against movement of said valve stem in said valve body is provided by the frictional engagement with one end of said sleeve with the adjacent one of said friction abutment rings, by the axial loading produced on the threaded engagement between said valve stem and said valve body, and by the frictional force required to move said friction sleeve axially along said smooth cylindrical portion, said friction sleeve being longitudinally split to grip said smooth cylindrical portion with a force produced by the elastic deformation of said sleeve by the radial expansion of said sleeve on said smooth cylindrical portion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |