Patent US3170477A successfully refreshed from Google Patents.
US3170477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam trap
Assignee: Yarnall Waring Co
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Filing: 1961-08-02
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Granted: 1965-02-23
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Expires: 1981-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jr John Scott
- 👤 Richard A Handschumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
F; F16; F16T; F16T1/00; F16T1/12; F16T1/16; F16T1/165; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
280 words
A STEAM TRAP HAVING A BODY FORMING A CONTROL CHAMBER, WALLS FORMING AN INLET PASSAGE ADJACENT THE MIDDLE OF ONE SIDE OF SAID CONTROL CHAMBER, WALLS FORMING AN OUTLET PASSAGE TO ONE SIDE OF THE CONTROL CHAMBER AT A LOCATION MORE MORE REMOTE FROM SAID MIDDLE THAN SAID INLET PASSAGE, A VALVE PLATE FREELY MOVABLE IN SAID CONTROL CHAMBER, SAID VALVE PLATE HAVINGA SEATED POSITION AT WHICH SAID INLET PASSAGE IS AT LEAST NEARLY CLOSED AND THE PORTION OF THE CONTROL CHAMBER ON THE SIDE OF THE VALVE PLATE REMOTE FROM THE INLET AND OUTLET PASSAGES IS NEARLY CLOSED OFF FROM THE OUTLET AND HAVING AN OPEN POSITION IN WHICH THE INLET PASSAGE AND THE OUTLET PASSAGE COMMUNICATE THROUGH THE CONTROL CHAMBER AND WITH THE PORTION OF THE CONTROL CHAMBER ON THE SIDE OF THE VALVE PLATE REMOTE FROM THE INLET AND OUTLET PASSAGES, SAID VALVE PLATE HAVING A RELATIVELY REDUCED CROSS SECTION TOWARD THE MIDDLE THEREOF FORMING A DEPRESSION ON THE TOP SIDE OF SAID PLATE AND HAVING A RELATIVELY THICKER CROSS SECTION OUTWARDLY OF THE MIDDLE, FIRST VALVE SEAT MEANS COOPERATING WITH THE VALVE PLATE IN SEATED POSITION OF THE VALVE PLATE TO AT LEAST GREATLY REDUCE FLOW FROM THE INLET PASSAGE TO THE CONTROL CHAMBER AND TO THE OUTLET PASSAGE, AND A SECOND VALVE SEAT MEANS COOPERATING WITH THE VALVE PLATE IN SEATED POSITION OF THE VALVE PLATE TO RESRTICT FLOW FROM THE PORTION OF THE CONTROL CHAMBER REMOTE FROM THE INLET AND OUTLET PASSAGES TO THE OUTLET PASSAGE, THERE BEING CONTINUOUS LEAKAGE MEANS BETWEEN THE PORTION OF THE CONTROL CHAMBER REMOTE FROM THE INLET AND OUTLET PASSAGES TO THE OUTLET EVEN WHEN THE VALVE IS SEATED.
Claim 2
Dependent Claim
280 words
A STEAM TRAP HAVING A BODY FORMING A CONTROL CHAMBER, WALLS FORMING AN INLET PASSAGE ADJACENT THE MIDDLE OF ONE SIDE OF SAID CONTROL CHAMBER, WALLS FORMING AN OUTLET PASSAGE TO ONE SIDE OF THE CONTROL CHAMBER AT A LOCATION MORE MORE REMOTE FROM SAID MIDDLE THAN SAID INLET PASSAGE, A VALVE PLATE FREELY MOVABLE IN SAID CONTROL CHAMBER, SAID VALVE PLATE HAVINGA SEATED POSITION AT WHICH SAID INLET PASSAGE IS AT LEAST NEARLY CLOSED AND THE PORTION OF THE CONTROL CHAMBER ON THE SIDE OF THE VALVE PLATE REMOTE FROM THE INLET AND OUTLET PASSAGES IS NEARLY CLOSED OFF FROM THE OUTLET AND HAVING AN OPEN POSITION IN WHICH THE INLET PASSAGE AND THE OUTLET PASSAGE COMMUNICATE THROUGH THE CONTROL CHAMBER AND WITH THE PORTION OF THE CONTROL CHAMBER ON THE SIDE OF THE VALVE PLATE REMOTE FROM THE INLET AND OUTLET PASSAGES, SAID VALVE PLATE HAVING A RELATIVELY REDUCED CROSS SECTION TOWARD THE MIDDLE THEREOF FORMING A DEPRESSION ON THE TOP SIDE OF SAID PLATE AND HAVING A RELATIVELY THICKER CROSS SECTION OUTWARDLY OF THE MIDDLE, FIRST VALVE SEAT MEANS COOPERATING WITH THE VALVE PLATE IN SEATED POSITION OF THE VALVE PLATE TO AT LEAST GREATLY REDUCE FLOW FROM THE INLET PASSAGE TO THE CONTROL CHAMBER AND TO THE OUTLET PASSAGE, AND A SECOND VALVE SEAT MEANS COOPERATING WITH THE VALVE PLATE IN SEATED POSITION OF THE VALVE PLATE TO RESRTICT FLOW FROM THE PORTION OF THE CONTROL CHAMBER REMOTE FROM THE INLET AND OUTLET PASSAGES TO THE OUTLET PASSAGE, THERE BEING CONTINUOUS LEAKAGE MEANS BETWEEN THE PORTION OF THE CONTROL CHAMBER REMOTE FROM THE INLET AND OUTLET PASSAGES TO THE OUTLET EVEN WHEN THE VALVE IS SEATED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |