US3744715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated temperature sensor actuator
Assignee: Siemens Bendix Automotive Electronics Ltd
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Filing: 1972-02-23
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Granted: 1973-07-10
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Expires: 1992-02-23
Abstract
Abstract Improvement in a system for controlling fluid temperature comprising a member movable between positions in which the temperature is respectively increased and decreased, and an actuator linked to the member and mounted to communicate with the fluid to adjust the position of the member in accordance with temperature changes in the fluid, the improvement being in the actuator, which comprises a housing; a diaphragm mounted in the housing to define a control chamber therein, the diaphragm having a valving portion and having a piston portion linked to the member and mounted to reciprocate in the housing, to move the member between its positions, the housing having an opening on one side of the diaphragm for connection to a source of regulating pressure, the valving portion being adjacent the opening and movable between sealed and unsealed positions with respect thereto; and a temperature sensitive element mounted to apply force to the valving portion dependent upon the fluid temperature, so that the balance of forces on the valving portion, including force attributable to the regulating pressure, will determine the position of the valving portion, and, in turn, the pressure in the chamber and the positions of the piston portion and the member.
Inventors
- 👤 G Maddocks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:56
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
197 words
In a system for controlling fluid temperature comprising a member movable between positions in which said temperature is respectively increased and decreased, and an actuator linked to said member and mounted to communicate with said fluid to adjust the position of said member in accordance with temperature changes in said fluid, that improvement wherein said actuator comprises a housing, a diaphragm mounted in said housing to define a control chamber therein, said diaphragm having a valving portion and having a piston portion linked to said member and mounted to reciprocate in said housing, to move said member between said positions, said housing having an opening on one side of said diaphragm for connection to a source of regulating pressure, said valving portion being adjacent said opening and movable between sealed and unsealed positions with respect thereto, and a temperature sensitive element mounted to apply force to said valving portion dependent upon said fluid temperature, so that the balance of forces on said valving portion, including force attributable to said regulating pressure, will determine the position of said valving portion and, in turn, the pressure in said chamber and the positions of said piston portion and said member.
Claim 2
Dependent Claim
197 words
In a system for controlling fluid temperature comprising a member movable between positions in which said temperature is respectively increased and decreased, and an actuator linked to said member and mounted to communicate with said fluid to adjust the position of said member in accordance with temperature changes in said fluid, that improvement wherein said actuator comprises a housing, a diaphragm mounted in said housing to define a control chamber therein, said diaphragm having a valving portion and having a piston portion linked to said member and mounted to reciprocate in said housing, to move said member between said positions, said housing having an opening on one side of said diaphragm for connection to a source of regulating pressure, said valving portion being adjacent said opening and movable between sealed and unsealed positions with respect thereto, and a temperature sensitive element mounted to apply force to said valving portion dependent upon said fluid temperature, so that the balance of forces on said valving portion, including force attributable to said regulating pressure, will determine the position of said valving portion and, in turn, the pressure in said chamber and the positions of said piston portion and said member.
Claim 3
Dependent Claim
59 words
The system of claim 1 wherein said piston portion of said diaphragm is sandwiched between a pair of more rigid elements, said member is a pivoted valving door in a branched conduit, said door in its said positions respectively blocking branches of said conduit, and said door and one of said elements are linked by a first class lever.
Claim 4
Dependent Claim
28 words
The system of claim 1 wherein said valving portion is a tongue of said diaphragm extending into a cup-like extension of said housing communicating with said control chamber.
Claim 5
Dependent Claim
32 words
The system of claim 3 wherein said tongue has a knob extending away from said chamber and connected to a bimetallic strip fixed to said housing and comprising said temperature sensitive element.
Claim 6
Dependent Claim
24 words
The system of claim 3 wherein a tube extends into said extension to a position adjacent said tongue, for supply of said regulating pressure.
Claim 7
Dependent Claim
16 words
The system of claim 1 wherein said housing has a bleed opening for said control chamber.
Claim 8
Dependent Claim
48 words
The system of claim 1 wherein said temperature sensitive element is a bimetallic strip connected between said housing and said valving portion of said diaphragm, and an adjustment screw extends between said strip and said housing to regulate the force applied by said strip to said valving portion.
Claim 9
Dependent Claim
12 words
The system of claim 1 in an automotive engine air supply conduit.
Claim 10
Dependent Claim
50 words
The system of claim 8 wherein said conduit includes a hot air inlet branch extending through a wall thereof along an axis oblique to the axis of said conduit and substantially into the interior of said conduit to improve mixture of hot air with the main stream through said conduit.
References Cited (Backward Citations)
US2142665A
Cited
US3459163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |