US3216244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling system for indicator
Assignee: Nordberg Manufacturing Co
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Filing: 1962-02-15
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Granted: 1965-11-09
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Expires: 1982-02-15
Abstract
No abstract record available.
Inventors
- 👤 George W Borchers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN AN ENGINE INDICATOR HAVING AN ENGINE CONDUIT JOINED TO A PISTON CYLINDER OF AN INTERNAL COMBUSTION ENGINE ON ONE END AND JOINED ON THE OTHER END TO A HOUSING CONTAINING A CLOSELY FITTING PISTON, A ROD EXTENDING FROM SAID PISTON, A SPRING PROVIDING TENSION AGAINST MOVEMENT OF THE ROD, SAID SPRING CALIBRATED TO TRANSLATE ROD MOVEMENT IN TERMS OF PRESSURE UNITS AND MEANS TO RECORD SUCH PRESSURES IN TERMS OF UNITS, A SUPPLY OF PURGING FLUID, MEANS TO ADMIT THE PURGING FLUID INTO THE ENGINE INDICATOR AT PRESSURES LESS THAN RECORDING ENGINE PRESSURES, AND MEANS TO STOP THE FLOW OF PURGING FLUID AT PRESSURES MORE THAN RECORDING ENGINE PRESSURES, WHEREBY SAID PURGING FLUID DOES NOT INTERFERE WITH THE PRESSURE RESPONSIVE OPERATION OF THE PISTON IN THE ENGINE INDICATOR.
Claim 2
Dependent Claim
129 words
IN AN ENGINE INDICATOR HAVING AN ENGINE CONDUIT JOINED TO A PISTON CYLINDER OF AN INTERNAL COMBUSTION ENGINE ON ONE END AND JOINED ON THE OTHER END TO A HOUSING CONTAINING A CLOSELY FITTING PISTON, A ROD EXTENDING FROM SAID PISTON, A SPRING PROVIDING TENSION AGAINST MOVEMENT OF THE ROD, SAID SPRING CALIBRATED TO TRANSLATE ROD MOVEMENT IN TERMS OF PRESSURE UNITS AND MEANS TO RECORD SUCH PRESSURES IN TERMS OF UNITS, A SUPPLY OF PURGING FLUID, MEANS TO ADMIT THE PURGING FLUID INTO THE ENGINE INDICATOR AT PRESSURES LESS THAN RECORDING ENGINE PRESSURES, AND MEANS TO STOP THE FLOW OF PURGING FLUID AT PRESSURES MORE THAN RECORDING ENGINE PRESSURES, WHEREBY SAID PURGING FLUID DOES NOT INTERFERE WITH THE PRESSURE RESPONSIVE OPERATION OF THE PISTON IN THE ENGINE INDICATOR.
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) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |