US3845788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor controlled valve for continuously feeding viscous liquids
Assignee: Western States Machine Co
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Filing: 1973-10-03
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Granted: 1974-11-05
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Expires: 1993-10-03
Abstract
Abstract Disclosed herein is a motor driven needle valve, with a manual override arrangement, for controllably feeding a stream of massecuite into a continuous centrifugal separator.
Inventors
- 👤 T Laven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:02
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/05; B; B04; B04B; B04B11/00; B04B11/02; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87652; Y10T137/8766
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
A valve for controlling the delivery of a stream of viscous material, comprising: an elongated valve body having an inlet at one end and a circular outlet orifice at the other end; a conical needle means supported on an elongated valve stem means, said needle means being disposed in said orifice and movable axially relative thereto to close the orifice or to define an annular gap for outflow of a stream of said viscous material; threaded drive nut means fixedly associated with said valve stem means; rotatable lead screw means in threaded engagement with said drive nut means; drive transmission means for rotating said lead screw means to move said valve stem means axially of said valve body; and maually operable means for rotating said drive nut means relative to said lead screw means independently of said transmission means.
Claim 2
Dependent Claim
139 words
A valve for controlling the delivery of a stream of viscous material, comprising: an elongated valve body having an inlet at one end and a circular outlet orifice at the other end; a conical needle means supported on an elongated valve stem means, said needle means being disposed in said orifice and movable axially relative thereto to close the orifice or to define an annular gap for outflow of a stream of said viscous material; threaded drive nut means fixedly associated with said valve stem means; rotatable lead screw means in threaded engagement with said drive nut means; drive transmission means for rotating said lead screw means to move said valve stem means axially of said valve body; and maually operable means for rotating said drive nut means relative to said lead screw means independently of said transmission means.
Claim 3
Dependent Claim
23 words
A valve according to claim 1, further characterized in that said manually operable means comprises a handwheel fixed to said drive nut means.
Claim 4
Dependent Claim
31 words
A valve according to claim 1, further characterized in that said transmission means includes a worm wheel fixed to said lead screw means and a worm meshing with said worm wheel.
Claim 5
Dependent Claim
66 words
A valve according to claim 1, in which said valve body is a generally cylindrical hollow body having an opening defined in a portion thereof remote from said orifice; said valve stem means extending axially through the space of said valve body and being supported in said opening; and hub means disposed centrally in the space of said valve body and supporting said stem means therein.
Claim 6
Dependent Claim
31 words
A valve according to claim 4, in which said hub means is fixed rigidly to said valve body by at least one arm extending between said body and said hub means.
Claim 7
Dependent Claim
61 words
A valve according to claim 5, in which said hub means has a manifold formed therein; a passage is formed in at least one said arm for conducting fluid into said manifold; and conduit means extend from said manifold between said hub means and said valve stem means for delivering said fluid along said valve stem means toward said needle means.
Claim 8
Dependent Claim
37 words
A valve according to claim 4, in which said opening has packing means disposed therein and means pressing said packing means in frictional engagement with said valve stem means, whereby the latter normally is restrained from rotation.
Claim 9
Dependent Claim
47 words
A valve according to claim 1, including limit means engageable by a member moved axially with said stem means at predetermined limits of a range of movement of said needle means to inactivate a motor acting through said drive transmission means to rotate said lead screw means.
References Cited (Backward Citations)
US1966209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |