Patent US3860029A successfully refreshed from Google Patents.
US3860029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve system
Assignee: Sulzer AG
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Filing: 1973-09-17
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Granted: 1975-01-14
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Expires: 1993-09-17
Abstract
Abstract The control valve is controlled in dependence on the pressure condition of the fluid flowing into the valve inlet. The valve closure member is under a biasing force independent of the electric motor to be moved into an open end position. In addition, the motor provides a force opposed to the biasing force to keep the valve closed. In order to release the closure member, the effect of the motor on the closure member is controlled via a switch, clutch or brake so that upon an increase in pressure over a set limit in the line to the valve, the closure member becomes biased into the open position.
Inventors
- 👤 Peter Hubler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:06
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/04; F16K31/047; F16K31/048; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7761; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18592
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
112 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for exerting a force to resist said biasing force; a transmission between said motor and said closure member, said transmission including a non-self-locking nut and screw drive; means for sensing a predetermined condition in the fluid upstream of said valve; and means for de-energizing said motor in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 2
Dependent Claim
112 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for exerting a force to resist said biasing force; a transmission between said motor and said closure member, said transmission including a non-self-locking nut and screw drive; means for sensing a predetermined condition in the fluid upstream of said valve; and means for de-energizing said motor in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 3
Dependent Claim
56 words
A valve system as set forth in claim 1 which includes an electrical circuit connected to said motor to energise said motor whereby said energized motor provides the force resisting said biasing force and said means for de-energizing includes a switch in said electrical circuit for opening said circuit to said motor to de-energize said motor.
Claim 4
Dependent Claim
34 words
A valve system as set forth in claim 1 further comprising a speed limiting means for limiting the speed of said closure member in moving towards said end position on de-energizing of said motor.
Claim 5
Dependent Claim
78 words
A valve system as set forth in claim 3 which includes an electrical circuit connected to said motor to energize said motor whereby said energized motor provides the force resisting said biasing force and said means for de-energizing includes a switch in said electrical circuit for opening said circuit to said motor to de-energize said motor, said speed limiting means includes a resistor and means to switch said resistor into said motor circuit when said switch is opened.
Claim 6
Dependent Claim
134 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; means for resisting said biasing force including an electric motor for exerting a force to resist said biasing force; means for sensing a predetermined condition in the fluid upstream of said valve; means for releasing said means for resisting said biasing force in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force; and a speed limiting means for limiting the speed of said closure member in moving towards said end position on release of said means for resisting said biasing force.
Claim 7
Dependent Claim
134 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; means for resisting said biasing force including an electric motor for exerting a force to resist said biasing force; means for sensing a predetermined condition in the fluid upstream of said valve; means for releasing said means for resisting said biasing force in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force; and a speed limiting means for limiting the speed of said closure member in moving towards said end position on release of said means for resisting said biasing force.
Claim 8
Dependent Claim
144 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for resisting said biasing force; an electrical circuit connected to said motor to energize said motor whereby said energized motor provides a force resisting said biasing force; a transmission between said motor and said closure member, said transmission including a non-self-locking nut and screw drive; means for sensing a predetermined condition in the fluid upstream of said valve; and means including a switch in said electrical circuit for opening said circuit to said motor to deenergize said motor in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 9
Dependent Claim
144 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for resisting said biasing force; an electrical circuit connected to said motor to energize said motor whereby said energized motor provides a force resisting said biasing force; a transmission between said motor and said closure member, said transmission including a non-self-locking nut and screw drive; means for sensing a predetermined condition in the fluid upstream of said valve; and means including a switch in said electrical circuit for opening said circuit to said motor to deenergize said motor in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 10
Dependent Claim
147 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for resisting said biasing force; an electrical circuit connected to said motor to energize said motor whereby said energized motor provides a force resisting said biasing force; a transmission between said motor and said closure member, said transmission iNcluding a non-self-locking nut and screw drive; means for sensing a predetermined condition in the fluid upstream of said valve; and means including a clutch in said transmission between said motor and said screw drive for releasing said screw drive from said motor in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 11
Dependent Claim
147 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for resisting said biasing force; an electrical circuit connected to said motor to energize said motor whereby said energized motor provides a force resisting said biasing force; a transmission between said motor and said closure member, said transmission iNcluding a non-self-locking nut and screw drive; means for sensing a predetermined condition in the fluid upstream of said valve; and means including a clutch in said transmission between said motor and said screw drive for releasing said screw drive from said motor in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 12
Dependent Claim
109 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for resisting said biasing force; a transmission including a non-self-locking nut and screw drive; a brake on said transmission; means for sensing a predetermined condition in the fluid upstream of said valve; and means connected to said brake for selectively releasing said brake in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
Claim 13
Dependent Claim
109 words
A valve system comprising a fluid flow control valve having a valve closure member for controlling a flow of fluid through said valve and means for biasing said closure member towards a predetermined end position under a biasing force; an electric motor for resisting said biasing force; a transmission including a non-self-locking nut and screw drive; a brake on said transmission; means for sensing a predetermined condition in the fluid upstream of said valve; and means connected to said brake for selectively releasing said brake in response to said condition exceeding a preset value to allow said closure member to move to said end position under said biasing force.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |