Patent US3077854A successfully refreshed from Google Patents.
US3077854A
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Magnetic pressure indicator
Assignee: Pall Corp
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Filing: 1960-02-29
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Granted: 1963-02-19
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Expires: 1980-02-29
Abstract
No abstract record available.
Inventors
- 👤 David B Pall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:41
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/08; G01L19/12; B; B01; B01D; B01D35/00; B01D35/14; B01D35/143; H; H01; H01H; H01H35/00; H01H35/24; H01H35/38; H01H36/00; H01H36/0073; Y; Y10; Y10S; Y10S116/00; Y10S116/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A PRESSURE INDICATING DEVICE COMPRISING A HOUSING, PISTON MEANS MOVABLY MOUNTED IN THE HOUSING, FIRST MAGNETIC MEANS MOVABLE WITH THE PISTON MEANS TOWARD AND AWAY FROM A FIRST POSITION, BIAS MEANS URGING THE PISTON MEANS IN ONE DIRECTION AND NORMALLY RETAINING THE FIRST MAGNETIC MEANS IN THE FIRST POSITION, FLUID DUCT MEANS COMMUNICATING WITH A SOURCE OF FLUID UNDER PRESSURE AND WITH ONE END OF THE PISTON MEANS TO URGE IT IN THE OPPOSITE DIRECTION, SECOND MAGNETIC MEANS MOVABLE TOWARD AND AWAY FROM THE FIRST MAGNETIC MEANS AND NORMALLY RETAINED TOWARD THE FIRST MAGNETIC MEANS BY MAGNETIC ATTRACTION WHEN THE FIRST MAGNETIC MEANS IS IN THE FIRST POSITION, SPRING BIAS MEANS URGING THE SECOND MAGNETIC MEANS AWAY FROM THE FIRST MAGNETIC MEANS SELECTED TO OVERCOME THE FORCE OF MAGNETIC ATTRACTION WHEN THE FIRST MAGNETIC MEANS IS MORE THAN A PREDETERMINED DISTANCE AWAY FROM THE SECOND MAGNETIC MEANS, AND SWITCH MEANS OPERABLE BY MOTION OF THE SECOND MAGNETIC MEANS AWAY FROM THE FIRST MAGNETIC MEANS.
Claim 2
Dependent Claim
164 words
A PRESSURE INDICATING DEVICE COMPRISING A HOUSING, PISTON MEANS MOVABLY MOUNTED IN THE HOUSING, FIRST MAGNETIC MEANS MOVABLE WITH THE PISTON MEANS TOWARD AND AWAY FROM A FIRST POSITION, BIAS MEANS URGING THE PISTON MEANS IN ONE DIRECTION AND NORMALLY RETAINING THE FIRST MAGNETIC MEANS IN THE FIRST POSITION, FLUID DUCT MEANS COMMUNICATING WITH A SOURCE OF FLUID UNDER PRESSURE AND WITH ONE END OF THE PISTON MEANS TO URGE IT IN THE OPPOSITE DIRECTION, SECOND MAGNETIC MEANS MOVABLE TOWARD AND AWAY FROM THE FIRST MAGNETIC MEANS AND NORMALLY RETAINED TOWARD THE FIRST MAGNETIC MEANS BY MAGNETIC ATTRACTION WHEN THE FIRST MAGNETIC MEANS IS IN THE FIRST POSITION, SPRING BIAS MEANS URGING THE SECOND MAGNETIC MEANS AWAY FROM THE FIRST MAGNETIC MEANS SELECTED TO OVERCOME THE FORCE OF MAGNETIC ATTRACTION WHEN THE FIRST MAGNETIC MEANS IS MORE THAN A PREDETERMINED DISTANCE AWAY FROM THE SECOND MAGNETIC MEANS, AND SWITCH MEANS OPERABLE BY MOTION OF THE SECOND MAGNETIC MEANS AWAY FROM THE FIRST MAGNETIC MEANS.
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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |