Patent US3826282A successfully refreshed from Google Patents.
US3826282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
External combustion engine and control mechanism therefor
Assignee: Thermo Fisher Scientific Inc
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Filing: 1972-05-05
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Granted: 1974-07-30
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Expires: 1992-05-05
Abstract
Abstract An external combustion engine, such as the vapor cycle engine, produces power by the expansion of a working fluid vapor. A vapor generator vaporizes a suitable working fluid which is fed to an expander. The vaporized working fluid expands and is subsequently fed back to the vapor generator. A burner provides energy for the vapor generator. The fuel and air supply for the burner is controlled by a system responsive to operating conditions of the engine. That is, the power input to the vapor generator is correlated by a control system with the demand on the engine. The control system disclosed involves a servomechanism which may suitably respond, for example, to either the working fluid flow rate or the input from an accelerator which commands a change in the working fluid flow rate.
Inventors
- 👤 W Noe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:40
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/08; F01K3/00; F01K3/18; F01K3/20; F01K3/22; F23; F23N; F23N1/00; F23N1/08; F23N1/10; F23N1/102; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
237 words
A three-way servovalve adapted for dynamic balancing comprising: a. means forming at least one supply plate for communication with a fluid source; b. first and second control passage plates contiguous opposite surfaces of said fluid supply plate means forming first and second control ports for communication with a fluid pressure responsive control device; c. first and second reservoir plates contiguous the surfaces of said first and second control passage plates opposite the surfaces thereof facing said supply plate means, forming first and second reservoir ports, respectively, for communication with a fluid reservoir; d. means forming an elongated bore through all of said plates for communicating respectively through said supply, control and reservoir plates with said fluid source, control device and fluid reservoir; and e. a three-land spool reciprocally mounted in said bore for restricting fluid flow through said bore between said control device and both said fluid source and said fluid reservoir when in a first position, for permitting flow through said bore from said fluid supply through both said first and second control ports while restricting flow through both said first and second reservoir ports when advanced in one direction from said first position, and for permitting flow through said bore from both said first and second control ports through both said first and second reservoir ports, respectively, while restricting fluid communication with said fluid supply when advanced in the opposite direction from sid first position.
Claim 2
Dependent Claim
237 words
A three-way servovalve adapted for dynamic balancing comprising: a. means forming at least one supply plate for communication with a fluid source; b. first and second control passage plates contiguous opposite surfaces of said fluid supply plate means forming first and second control ports for communication with a fluid pressure responsive control device; c. first and second reservoir plates contiguous the surfaces of said first and second control passage plates opposite the surfaces thereof facing said supply plate means, forming first and second reservoir ports, respectively, for communication with a fluid reservoir; d. means forming an elongated bore through all of said plates for communicating respectively through said supply, control and reservoir plates with said fluid source, control device and fluid reservoir; and e. a three-land spool reciprocally mounted in said bore for restricting fluid flow through said bore between said control device and both said fluid source and said fluid reservoir when in a first position, for permitting flow through said bore from said fluid supply through both said first and second control ports while restricting flow through both said first and second reservoir ports when advanced in one direction from said first position, and for permitting flow through said bore from both said first and second control ports through both said first and second reservoir ports, respectively, while restricting fluid communication with said fluid supply when advanced in the opposite direction from sid first position.
Claim 3
Dependent Claim
107 words
A three-way servovalve comprising: a. means forming an elongated passageway; b. means forming a supply port for connecting said passageway to a fluid source; c. means forming a pair of control ports on opposite sides of said supply port means for connecting said passageway to a control device; d. means forming a pair of reservoir ports adjacent the sides of said control ports opposite said supply port means for connecting said passageway to a fluid reservoir; and e. means reciprocally mounted in said passageway for selectively establishing exclusive communication between either said control ports and said supply port means, or said control ports and said reservoir ports.
Claim 4
Dependent Claim
107 words
A three-way servovalve comprising: a. means forming an elongated passageway; b. means forming a supply port for connecting said passageway to a fluid source; c. means forming a pair of control ports on opposite sides of said supply port means for connecting said passageway to a control device; d. means forming a pair of reservoir ports adjacent the sides of said control ports opposite said supply port means for connecting said passageway to a fluid reservoir; and e. means reciprocally mounted in said passageway for selectively establishing exclusive communication between either said control ports and said supply port means, or said control ports and said reservoir ports.
Claim 5
Dependent Claim
204 words
A servomechanism for regulating a fluid pressure responsive control device comprising: a. means forming a bore; b. means forming a supply port for connecting said bore to a fluid source; c. means forming a pair of control ports on opposite sides of said supply port connecting said bore to said control device; d. means forming a pair of reservoir ports adjacent the sides of said control ports opposite said supply port means for connecting said bore to a fluid reservoir at a low pressure level relative to the pressure level of said fluid source; e. spool means reciprocally mounted in said bore for establishing communication between said fluid source and said control device through said supply port and control ports while simultaneously restricting flow through said reservoir ports to apply the relatively high pressure of said fluid source to said control device when advanced in one direction and for establishing communication between said control device and said reservoir through said control ports and reservoir ports while simultaneously restricting flow through said supply port to vent said control device to the relatively low pressure of said fluid reservoir when advanced in the opposite direction; and f. means for imparting reciprocal motion to said spool means.
Claim 6
Dependent Claim
204 words
A servomechanism for regulating a fluid pressure responsive control device comprising: a. means forming a bore; b. means forming a supply port for connecting said bore to a fluid source; c. means forming a pair of control ports on opposite sides of said supply port connecting said bore to said control device; d. means forming a pair of reservoir ports adjacent the sides of said control ports opposite said supply port means for connecting said bore to a fluid reservoir at a low pressure level relative to the pressure level of said fluid source; e. spool means reciprocally mounted in said bore for establishing communication between said fluid source and said control device through said supply port and control ports while simultaneously restricting flow through said reservoir ports to apply the relatively high pressure of said fluid source to said control device when advanced in one direction and for establishing communication between said control device and said reservoir through said control ports and reservoir ports while simultaneously restricting flow through said supply port to vent said control device to the relatively low pressure of said fluid reservoir when advanced in the opposite direction; and f. means for imparting reciprocal motion to said spool means.
Claim 7
Dependent Claim
173 words
A three-way servovalve according to claim 3 wherein said spool means comprises three lands, a first land for blocking a passage between a first reservoir port and an adjacent first control port when said spool is in a first position and unblocking said passage when said spool is in a second position, a second land for unblocking a passage between said first control port and said supply port when said spool is in said first position and blocking said passage between said first control port and said supply port when said spool is in said second position, and a third land for blocking a passage between a second reservoir port and an adjacent second control port when said spool is in said first position while simultaneoUsly unblocking a passage between said supply port and said second control port and, when said spool is in said second position, unblocking said passage between said second reservoir port and said second control port while blocking said passage between said supply port and said second control port.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |