US3734403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic vacuum valve
Assignee: ACUSTAR Inc A CORP OF
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Filing: 1971-09-17
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Granted: 1973-05-22
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Expires: 1991-09-17
Abstract
Abstract A temperature responsive vacuum modulating valve having an enclosed bimetal temperature sensitive element supported at both ends for improved operation and calibration, the overall valve design exhibiting improved thermal responsivity.
Inventors
- 👤 R Eshelman
- 👤 W Ohar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:08
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/185; 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
146 words
A thermostatic vacuum valve comprising: a valve body having an interior space defining a vacuum flow chamber; an inlet vacuum port in said body for connecting the chamber to a source of vacuum; an outlet vacuum port in said body for connecting the chamber with a vacuum utilizing means; an atmospheric bleed port in said body for admitting air into the vacuum chamber; and a flat bimetal strip mounted in said chamber, with an intermediate portion thereof underlying the bleed port, one end of the strip being fixedly secured to one side of the bleed port, the other end being slidably supported to the other side of the bleed port whereby the flow of air through the port into the chamber is modulated by the underlying portion of the strip as it deflects according to temperature variations to move toward and away from the bleed port.
Claim 2
Dependent Claim
146 words
A thermostatic vacuum valve comprising: a valve body having an interior space defining a vacuum flow chamber; an inlet vacuum port in said body for connecting the chamber to a source of vacuum; an outlet vacuum port in said body for connecting the chamber with a vacuum utilizing means; an atmospheric bleed port in said body for admitting air into the vacuum chamber; and a flat bimetal strip mounted in said chamber, with an intermediate portion thereof underlying the bleed port, one end of the strip being fixedly secured to one side of the bleed port, the other end being slidably supported to the other side of the bleed port whereby the flow of air through the port into the chamber is modulated by the underlying portion of the strip as it deflects according to temperature variations to move toward and away from the bleed port.
Claim 3
Dependent Claim
42 words
The valve according to claim 1 wherein the bimetal strip contains a generally U-shaped cut-out in the fixedly secured end to provide a hinging action when the strip deflects, the open arms being oriented toward one of the ends of the strip.
Claim 4
Dependent Claim
35 words
The valve according to claim 2 wherein the portion of bimetal intermediate the U-shaped cut-out is bent out of the plane of the strip to provide a spring biased effect when the strip is mounted.
Claim 5
Dependent Claim
50 words
The valve according to claim 1 wherein the valve body comprises: a body cup-like portion; an upper cup-like cover portion nested into the bottom portion to form the vacuum chamber therebetween; the bleed port is in the cover; and the bimetal strip is secured to the underside of the cover.
Claim 6
Dependent Claim
45 words
The valve according to claim 4 wherein the upper cup is carried within the bottom cup to provide a vacuum chamber therebetween, contact between the two cups being by interference of it, the upper cup being of a thicker gage material than the bottom cup.
Claim 7
Dependent Claim
32 words
The valve according to claim 4 wherein the bleed port is substantially centrally located in the cover and includes an interior seat-like area surrounding the opening and extending into the vacuum chamber.
Claim 8
Dependent Claim
26 words
The valve according to claim 6 wherein the fixedly secured end of the strip is attached to a raised portion of the underside of the cover.
Claim 9
Dependent Claim
22 words
The valve according to claim 1 wherein the bimetal strip is positioned with its low deflection side oriented toward the bleed port.
Claim 10
Dependent Claim
31 words
The valve according to claim 1 wherein the input and output ports are located on a centerline at a substantially right angle to the longitudinal centerline of the mounted bimetal strip.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |