Patent US3115147A successfully refreshed from Google Patents.
US3115147A
Expired / Lapsed
US
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Pneumatic hesitation relay
Assignee: Robertshaw Controls Co
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Filing: 1962-02-28
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Granted: 1963-12-24
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Expires: 1982-02-28
Abstract
No abstract record available.
Inventors
- 👤 Klaus P Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:14
CPC Classifications
D; D01; D01H; D01H7/00; D01H7/02; D01H7/04; D01H7/045; D01H7/048; F; F15; F15C; F15C4/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2607; Y10T137/261; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7768
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A PNEUMATIC RELAY COMPRISING: AN INLET PASSAGE FOR CONNECTION WITH A VARIABLE SIGNAL PRESSURE, AN OUTPUT CHAMBER HAVING A WALL MOVABLE IN RESPONSE TO PRESSURE VARIATIONS IN THE OUTPUT CHAMBER, MEANS CONTROLLED BY THE POSITION OF THE MOVABLE WALL FOR CONTROLLING COMMUNICATION BETWEEN THE OUTPUT CHAMBER AND THE INLET PASSAGE, AND THE OUTPUT CHAMBER AND ATMOSPHERE, MEANS BIASING THE MOVABLE WALL IN A DIRECTION TO MAINTAIN COMMUNICATION BETWEEN THE OUTPUT CHAMBER AND THE INLET PASSAGE WHEN THE SIGNAL PRESSURE IS LESS THAN A FIRST VALUE DETERMINED BY THE FORCE OF THE BIASING MEANS, AND TO MAINTAIN THE PRESSURE IN THE OUTPUT CHAMBER AT SAID FIRST VALUE WHEN THE SIGNAL PRESSURE IS BETWEEN SAID FIRST VALUE AND A SECOND HIGHER VALUE, AND MEANS FOR AUGMENTING SAID BIASING MEANS WHEN THE SIGNAL PRESSURE EXCEEDS SAID SECOND VALUE TO MAINTAIN THE PRESSURE IN THE OUTPUT CHAMBER AT A VALUE EQUAL TO THE SIGNAL PRESSURE LESS THE DIFFERENCE BETWEEN THE FIRST AND SECOND VALUES.
Claim 2
Dependent Claim
160 words
A PNEUMATIC RELAY COMPRISING: AN INLET PASSAGE FOR CONNECTION WITH A VARIABLE SIGNAL PRESSURE, AN OUTPUT CHAMBER HAVING A WALL MOVABLE IN RESPONSE TO PRESSURE VARIATIONS IN THE OUTPUT CHAMBER, MEANS CONTROLLED BY THE POSITION OF THE MOVABLE WALL FOR CONTROLLING COMMUNICATION BETWEEN THE OUTPUT CHAMBER AND THE INLET PASSAGE, AND THE OUTPUT CHAMBER AND ATMOSPHERE, MEANS BIASING THE MOVABLE WALL IN A DIRECTION TO MAINTAIN COMMUNICATION BETWEEN THE OUTPUT CHAMBER AND THE INLET PASSAGE WHEN THE SIGNAL PRESSURE IS LESS THAN A FIRST VALUE DETERMINED BY THE FORCE OF THE BIASING MEANS, AND TO MAINTAIN THE PRESSURE IN THE OUTPUT CHAMBER AT SAID FIRST VALUE WHEN THE SIGNAL PRESSURE IS BETWEEN SAID FIRST VALUE AND A SECOND HIGHER VALUE, AND MEANS FOR AUGMENTING SAID BIASING MEANS WHEN THE SIGNAL PRESSURE EXCEEDS SAID SECOND VALUE TO MAINTAIN THE PRESSURE IN THE OUTPUT CHAMBER AT A VALUE EQUAL TO THE SIGNAL PRESSURE LESS THE DIFFERENCE BETWEEN THE FIRST AND SECOND VALUES.
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) | 1966-12-23 | 1967-06-24 | 1967-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-23 | 1971-06-24 | 1971-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-23 | 1975-06-24 | 1975-12-24 | $7700.00 | Window Closed / Lapsed |