US3744716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal modulation of air supply system in automotive vehicle
Assignee: Siemens Bendix Automotive Electronics Ltd
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Filing: 1971-11-22
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Granted: 1973-07-10
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Expires: 1991-11-22
Abstract
Abstract Temperature sensor for controlling air pressure in vacuum control line for thermally modulated air supply system in an automotive vehicle, featuring a temperature responsive element isolated from the atmosphere except through the control orifice and the air line in which pressure is being controlled; a free floating valve element supported against the control orifice from beneath by a bimetal strip, so that movement of the strip away from the orifice enlarges its effective opening; and a valved orifice-defining member adjustable toward and away from the bimetal strip for calibration.
Inventors
- 👤 H Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:06
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00421; B60H1/00435; B60H1/00442; B60H1/00485; F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
In a vacuum control system for a thermally modulated air supply system in an automobile, said system having a vacuum line, a device for controlling air pressure in said vacuum line in said system in response to temperature changes, comprising a housing defining a pressure chamber connected to said line in which pressure is to be controlled, and having a control orifice, a temperature sensitive element mounted inside said chamber beneath said orifice, and a free floating valve mounted inside said chamber and arranged to determine the effective opening through said orifice in response to changes in the state of said element said valve having a base resting loosely upon said element and a stem extending upwardly from said base and loosely into said orifice, said stem having an O.D. smaller than the I.D. of said orifice and thereby being freely movable in said orifice.
Claim 2
Dependent Claim
145 words
In a vacuum control system for a thermally modulated air supply system in an automobile, said system having a vacuum line, a device for controlling air pressure in said vacuum line in said system in response to temperature changes, comprising a housing defining a pressure chamber connected to said line in which pressure is to be controlled, and having a control orifice, a temperature sensitive element mounted inside said chamber beneath said orifice, and a free floating valve mounted inside said chamber and arranged to determine the effective opening through said orifice in response to changes in the state of said element said valve having a base resting loosely upon said element and a stem extending upwardly from said base and loosely into said orifice, said stem having an O.D. smaller than the I.D. of said orifice and thereby being freely movable in said orifice.
Claim 3
Dependent Claim
18 words
The device of claim 1 in an air cleaner, wherein said housing is mounted in said air cleaner.
Claim 4
Dependent Claim
24 words
The device of claim 1 wherein said orifice is defined by a cylindrical bore in a member mounted in a wall of said chamber.
Claim 5
Dependent Claim
44 words
The device of claim 3 wherein said member is threadedly adjustable with respect to said wall for movement toward and away from said strip, to thereby determine the degree to which said stem extends into said bore for a given position of said strip.
Claim 6
Dependent Claim
60 words
The device of claim 4 wherein said member has a cylindrical bore defining said orifice, with a bevelled surface at one end of said bore adjacent said valve, and said valve has a base with an upper frusto-conical surface matching said bevelled surface and a stem extending upwardly from said surfaces into said bore in all positions of said valve.
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) | 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 |