Patent US3590849A successfully refreshed from Google Patents.
US3590849A
Expired / Lapsed
US
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Vacuum servocontrol systems
Assignee: Clear Hooters Ltd
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Filing: 1969-06-20
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Granted: 1971-07-06
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Expires: 1989-06-20
Abstract
Abstract In a vacuum modulating valve in which the pressure in an outlet chamber is controlled by a diaphragm having an axial stem engaged in an opening in a blade spring anchored at one end and cooperating at its free end with a cam for adjustment, a rigid washer located on said stem between the spring and a radial flange on the extremity of the stem is connected to the spring by means permitting relative rocking movement but preventing relative displacement in a direction lengthwise of the spring.
Inventors
- 👤 Levi J F Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:49
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/52; F16K31/524; F16K31/52408; F16K7/00; F16K7/12; Y; Y10; Y10S; Y10S137/00; Y10S137/907; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
A vacuum-modulating valve comprising a valve body incorporating an outlet chamber adapted to be connected to a fluid pressure motor and an inlet adapted to be connected to a source of vacuum, a diaphragm exposed on one side to atmosphere and on the other side to the pressure in the outlet chamber, a valve member controlling the inlet and a passage through the diaphragm in accordance with the position of the diaphragm, and a blade spring fixed at one end and engaged at the other by an angularly movable cam of which the position is adjustable manually, the diaphragm having a hollow axial stem which extends through a clearance opening in the spring and having on its extremity a radial flange between which and the spring a washer is located to cause the diaphragm to move with the spring against the resilient resistance provided by the spring, said washer being rigid and the connected to the spring by means permitting limited rocking movement between the washer and the stem and spring but preventing any relative displacement in a direction lengthwise of the spring.
Claim 2
Dependent Claim
183 words
A vacuum-modulating valve comprising a valve body incorporating an outlet chamber adapted to be connected to a fluid pressure motor and an inlet adapted to be connected to a source of vacuum, a diaphragm exposed on one side to atmosphere and on the other side to the pressure in the outlet chamber, a valve member controlling the inlet and a passage through the diaphragm in accordance with the position of the diaphragm, and a blade spring fixed at one end and engaged at the other by an angularly movable cam of which the position is adjustable manually, the diaphragm having a hollow axial stem which extends through a clearance opening in the spring and having on its extremity a radial flange between which and the spring a washer is located to cause the diaphragm to move with the spring against the resilient resistance provided by the spring, said washer being rigid and the connected to the spring by means permitting limited rocking movement between the washer and the stem and spring but preventing any relative displacement in a direction lengthwise of the spring.
Claim 3
Dependent Claim
53 words
A vacuum-modulating valve as in claim 1 wherein the washer, which is of metal, is a tight fit on the stem of the diaphragm and has at opposite ends of a diameter at right angles to the length of the spring cranked tapered tags which are received in holes pierced in the spring.
Claim 4
Dependent Claim
120 words
A vacuum-modulating valve as in claim 2 wherein the relative dimensions of the tags on the washer and the holes in the spring are such that when the tags have entered into the holes as far as they can go there is sufficient clearance between the washer and the spring to allow limited rocking movement between the spring and the washer and the stem of the diaphragm in a direction transverse to the length of the spring. as far as they can go there is sufficient clearance between the washer and the spring to allow limited rocking movement between the spring and the washer and the stem of the diaphragm in a direction transverse to the length of the spring.
References Cited (Backward Citations)
US2811314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |