Patent US3336841A successfully refreshed from Google Patents.
US3336841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air motor
Assignee: Individual
•
Filing: 1966-07-12
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Granted: 1967-08-22
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Expires: 1986-07-12
Abstract
No abstract record available.
Inventors
- 👤 John G Fontaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:08
CPC Classifications
F; F01; F01B; F01B17/00; F01B17/02; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1423; F15B15/1457; F15B15/149; F15B15/20; F15B15/28; F15B15/2807
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
377 words
AN AIR MOTOR OF THE CHARACTER DESCRIBED THAT COMPRISES A CYLINDER, CLOSED AT ITS UPPER AND LOWER ENDS, A PISTON SLIDABLE IN THE CYLINDER, A SOLENOID VALVE THAT IS CONNECTED TO A COMPRESSED AIR RESERVOIR AND WITH THE SOLENOID VALVE BEING CONNECTED TO AN UPPER CLOSED END OF THE CYLINDER FOR DIRECTING COMPRESSED AIR INTO THE CYLINDER AND TO FORCE THE PISTON DOWNWARDLY, A CONTROL SWITCH CARRIED BY A LOWER END OF THE CYLINDER AND WITH THE SWITCH BEING ELECTRICALLY CONNECTED TO THE SOLENOID VALVE, A PISTON ROD FIXED TO THE PISTON AND EXTENDING UPWARDLY THROUGH A BUSHING AND WITH A LOWER END OF THE PISTON ROD PROJECTING DOWNWARDLY BELOW THE PISTON AND SLIDABLE THROUGH A LOWER CLOSURE OF THE CYLINDER WHEN THE PISTON HAS BEEN FORCED DOWNWARDLY AND TO CAUSE THE LOWER END OF THE PISTON ROD TO ENGAGE THE SWITCH FOR THE SOLENOID VALVE, THE UPPER END OF THE PISTON ROD BEING CONNECTED TO A PULLEY THAT IS CONNECTED TO A SHAFT THAT IS ADAPTED TO BE ROTATED WHEN THE PISTON MOVES DOWNWARDLY AND A SECOND PULLEY CARRIES UPON THE SHAFT AND THAT IS PROVIDED WITH A BELT THAT IS CONNECTED TO A RETRACTIBLE SPRING FOR RETURNING THE PISTON TO AN UPPER POSITION AFTER THE SWITCH HAS BEEN ENGAGED BY THE PISTON ROD, THE CYLINDER IS CLOSED AT ITS OPPOSITE ENDS BY HEADS, A BUSHING IN THE UPPER HEAD AND A BUSHING IN THE LOWER HEAD, THE PISTON ROD BEING AXIAL WITH RESPECT TO THE CYLINDER AND SLIDABLE THROUGH THE BUSHINGS, THE UPPER PORTION OF THE PISTON ROD CONFORMING TO THE DIAMETER OF THE BUSHING IN THE UPPER HEAD WHEN THE PISTON IS IN A LOWERMOST POSITION AND WITH THE PISTON ROD BEING FLATTENED ON A TAPER UPON ONE SIDE SO AS TO FORM A VARIABLE AIR ESCAPE OPENING WITH THE UPPER BUSHING WHEN THE PISTON IS IN THE UPPERMOST POSITION AND TO PERMIT OF AN ESCAPE OF AIR FROM THE AIR SUPPLY TO GRADUALLY FORCE THE PISTON DOWNWARDLY TO THE POINT WHERE THE PISTON ROD AT ITS LOWER END PASSES THROUGH THE LOWER BUSHING AND TO ACTUATE THE SWITCH FOR CLOSING THE SOLENOID VALVE AND TO INTERRUPT THE FLOW OF AIR TO THE CYLINDER AND TO PERMIT THE SPRING TO SHIFT THE PISTON UPWARDLY.
Claim 2
Dependent Claim
377 words
AN AIR MOTOR OF THE CHARACTER DESCRIBED THAT COMPRISES A CYLINDER, CLOSED AT ITS UPPER AND LOWER ENDS, A PISTON SLIDABLE IN THE CYLINDER, A SOLENOID VALVE THAT IS CONNECTED TO A COMPRESSED AIR RESERVOIR AND WITH THE SOLENOID VALVE BEING CONNECTED TO AN UPPER CLOSED END OF THE CYLINDER FOR DIRECTING COMPRESSED AIR INTO THE CYLINDER AND TO FORCE THE PISTON DOWNWARDLY, A CONTROL SWITCH CARRIED BY A LOWER END OF THE CYLINDER AND WITH THE SWITCH BEING ELECTRICALLY CONNECTED TO THE SOLENOID VALVE, A PISTON ROD FIXED TO THE PISTON AND EXTENDING UPWARDLY THROUGH A BUSHING AND WITH A LOWER END OF THE PISTON ROD PROJECTING DOWNWARDLY BELOW THE PISTON AND SLIDABLE THROUGH A LOWER CLOSURE OF THE CYLINDER WHEN THE PISTON HAS BEEN FORCED DOWNWARDLY AND TO CAUSE THE LOWER END OF THE PISTON ROD TO ENGAGE THE SWITCH FOR THE SOLENOID VALVE, THE UPPER END OF THE PISTON ROD BEING CONNECTED TO A PULLEY THAT IS CONNECTED TO A SHAFT THAT IS ADAPTED TO BE ROTATED WHEN THE PISTON MOVES DOWNWARDLY AND A SECOND PULLEY CARRIES UPON THE SHAFT AND THAT IS PROVIDED WITH A BELT THAT IS CONNECTED TO A RETRACTIBLE SPRING FOR RETURNING THE PISTON TO AN UPPER POSITION AFTER THE SWITCH HAS BEEN ENGAGED BY THE PISTON ROD, THE CYLINDER IS CLOSED AT ITS OPPOSITE ENDS BY HEADS, A BUSHING IN THE UPPER HEAD AND A BUSHING IN THE LOWER HEAD, THE PISTON ROD BEING AXIAL WITH RESPECT TO THE CYLINDER AND SLIDABLE THROUGH THE BUSHINGS, THE UPPER PORTION OF THE PISTON ROD CONFORMING TO THE DIAMETER OF THE BUSHING IN THE UPPER HEAD WHEN THE PISTON IS IN A LOWERMOST POSITION AND WITH THE PISTON ROD BEING FLATTENED ON A TAPER UPON ONE SIDE SO AS TO FORM A VARIABLE AIR ESCAPE OPENING WITH THE UPPER BUSHING WHEN THE PISTON IS IN THE UPPERMOST POSITION AND TO PERMIT OF AN ESCAPE OF AIR FROM THE AIR SUPPLY TO GRADUALLY FORCE THE PISTON DOWNWARDLY TO THE POINT WHERE THE PISTON ROD AT ITS LOWER END PASSES THROUGH THE LOWER BUSHING AND TO ACTUATE THE SWITCH FOR CLOSING THE SOLENOID VALVE AND TO INTERRUPT THE FLOW OF AIR TO THE CYLINDER AND TO PERMIT THE SPRING TO SHIFT THE PISTON UPWARDLY.
References Cited (Backward Citations)
US462272A
Cited
GB824734A
Cited
US3014493A
Cited
US3053187A
Cited
US3043093A
Cited
US2973744A
Cited
US3111778A
Cited
US3232182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |