Patent US3099438A successfully refreshed from Google Patents.
US3099438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door control apparatus
Assignee: —
•
Filing: —
•
Granted: 1963-07-30
•
Expires: 1980-07-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:04
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/63; E05F1/00; E05F1/08; E05F1/10; E05F1/1091; E05F15/50; E05F15/53; E05F15/56; E05F15/70; E05F15/72; E05Y; E05Y2800/00; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; E05Y2900/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
CONTROL APPARATUS FOR A COMPARTMENT DOOR HINGED FOR SWINGING MOVEMENT RELATIVE TO A DOORWAY, COMPRISING IN COMBINATION, A SOURCE OF COMPRESSED AIR, AN ELONGATE AIR CYLINDER HAVING A BASE END AND A HEAD END, AND A PISTON ROD RECIPROCABLE THROUGH THE HEAD END OF THE CYLINDER, MEANS PIVOTING THE CYLINDER BASE END AND THE FREE END OF THE PISTON ROD TO A SUPPORT AND TO THE DOOR, RESPECTIVELY, IN POSITION TO MOVE THE DOOR TO OPEN AND CLOSED POSITIONS UPON SELECTIVE APPLICATION OF AIR PRESSURE TO THE CYLINDER ENDS, PNEUMATIC MEANS INCLUDING A SHIFTABLE VALVE AND TUBES INTERCONNECTING THE VALVE WITH OPPOSITE ENDS OF THE CYLINDER, WHEREBY SHIFTING OF THE VALVE ALTERNATIVELY DIRECTS AIR PRESSURE TO OPPOSITE ENDS OF THE CYLINDER FOR MOVING THE DOOR, ELECTRICAL MEANS FOR SHIFTING THE VALVE INCLUDING A PLURALITY OF CIRCUIT CONTROL SWITCHES, AND MEANS FOR ACTUATING SAID SWITCHES BY THE FORCE OF AIR EXHAUSTED FROM ONE END OF THE DOOR-OPERATING CYLINDER WHILE THE OPPOSITE END IS CHARGED WITH AIR PRESSURE FROM THE COMPRESSED AIR SOURCE.
Claim 2
Dependent Claim
171 words
CONTROL APPARATUS FOR A COMPARTMENT DOOR HINGED FOR SWINGING MOVEMENT RELATIVE TO A DOORWAY, COMPRISING IN COMBINATION, A SOURCE OF COMPRESSED AIR, AN ELONGATE AIR CYLINDER HAVING A BASE END AND A HEAD END, AND A PISTON ROD RECIPROCABLE THROUGH THE HEAD END OF THE CYLINDER, MEANS PIVOTING THE CYLINDER BASE END AND THE FREE END OF THE PISTON ROD TO A SUPPORT AND TO THE DOOR, RESPECTIVELY, IN POSITION TO MOVE THE DOOR TO OPEN AND CLOSED POSITIONS UPON SELECTIVE APPLICATION OF AIR PRESSURE TO THE CYLINDER ENDS, PNEUMATIC MEANS INCLUDING A SHIFTABLE VALVE AND TUBES INTERCONNECTING THE VALVE WITH OPPOSITE ENDS OF THE CYLINDER, WHEREBY SHIFTING OF THE VALVE ALTERNATIVELY DIRECTS AIR PRESSURE TO OPPOSITE ENDS OF THE CYLINDER FOR MOVING THE DOOR, ELECTRICAL MEANS FOR SHIFTING THE VALVE INCLUDING A PLURALITY OF CIRCUIT CONTROL SWITCHES, AND MEANS FOR ACTUATING SAID SWITCHES BY THE FORCE OF AIR EXHAUSTED FROM ONE END OF THE DOOR-OPERATING CYLINDER WHILE THE OPPOSITE END IS CHARGED WITH AIR PRESSURE FROM THE COMPRESSED AIR SOURCE.
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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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |