US3107581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydropneumatic feed device
Assignee: Individual
•
Filing: 1958-05-22
•
Granted: 1963-10-22
•
Expires: 1978-05-22
Abstract
No abstract record available.
Inventors
- 👤 Ackerman Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:06
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/26; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/3056; F15B2211/30565; F15B2211/3057; F15B2211/40; F15B2211/405; F15B2211/40576; F15B2211/40592; F15B2211/41; F15B2211/411; F15B2211/415; F15B2211/41527; F15B2211/41536; F15B2211/42; F15B2211/428; F15B2211/60; F15B2211/625; F15B2211/63; F15B2211/6303; F15B2211/6306; F15B2211/6313; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/71; F15B2211/7107; F15B2211/75; F15B2211/80; F15B2211/885; F15B2211/8855; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5152; Y10T29/5154; Y10T29/5158; Y10T82/00; Y10T82/25; Y10T82/2531; Y10T82/2533
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN A FLUID PRESSURE OPERATED RECIPROCATING MECHANISM THE COMBINATION OF A STATIONARY POWER CYLINDER AND A STATIONARY CONTROL CYLINDER RIGIDLY INTERCONNECTED WITH ONE ANOTHER AND ARRANGED IN CONCENTRIC RELATION WITH EACH OTHER WITH ONE CYLINDER INSIDE OF THE OTHER TO FORM AN INNER CYLINDRICAL SPACE DEFINED BY THE INNER SURFACE OF THE INNER CYLINDER AND AN OUTER ANNULAR SPACE DEFINED BY THE INNER SURFACE OF THE OUTER CYLINDER AND THE OUTER SURFACE OF THE INNER CYLINDER, A CIRCULAR PISTON RECIPROCABLY DISPOSED IN THE INNER CYLINDRICAL SPACE, AN ANNULAR PISTON DISPOSED IN THE ANNULAR SPACE, SAID PISTONS BEING RIGIDLY INTERCONNECTED FOR SIMULTANEOUS MOVEMENT, CONDUIT MEANS SUPPLYING AN ELASTIC FLUID ALTERNATELY TO OPPOSITE ENDS OF THE POWER CYLINDER, CONDUIT MEANS INCLUDING A RESTRICTED FLOW VALVE CONNECTING OPPOSITE ENDS OF THE CONTROL CYLINDER, AN INELASTIC FLUID THE CONTROL CYLINDER AND THE SECOND-NAMED CONDUIT MEANS, AT LEAST ONE OF SAID PISTONS HAVING A PISTON ROD EXTENDING EXTERNALLY OF ITS ASSOCIATED CYLINDER FOR INTERCONNECTION WITH THE MECHANISM TO BE RECIPROCATED.
Claim 2
Dependent Claim
165 words
IN A FLUID PRESSURE OPERATED RECIPROCATING MECHANISM THE COMBINATION OF A STATIONARY POWER CYLINDER AND A STATIONARY CONTROL CYLINDER RIGIDLY INTERCONNECTED WITH ONE ANOTHER AND ARRANGED IN CONCENTRIC RELATION WITH EACH OTHER WITH ONE CYLINDER INSIDE OF THE OTHER TO FORM AN INNER CYLINDRICAL SPACE DEFINED BY THE INNER SURFACE OF THE INNER CYLINDER AND AN OUTER ANNULAR SPACE DEFINED BY THE INNER SURFACE OF THE OUTER CYLINDER AND THE OUTER SURFACE OF THE INNER CYLINDER, A CIRCULAR PISTON RECIPROCABLY DISPOSED IN THE INNER CYLINDRICAL SPACE, AN ANNULAR PISTON DISPOSED IN THE ANNULAR SPACE, SAID PISTONS BEING RIGIDLY INTERCONNECTED FOR SIMULTANEOUS MOVEMENT, CONDUIT MEANS SUPPLYING AN ELASTIC FLUID ALTERNATELY TO OPPOSITE ENDS OF THE POWER CYLINDER, CONDUIT MEANS INCLUDING A RESTRICTED FLOW VALVE CONNECTING OPPOSITE ENDS OF THE CONTROL CYLINDER, AN INELASTIC FLUID THE CONTROL CYLINDER AND THE SECOND-NAMED CONDUIT MEANS, AT LEAST ONE OF SAID PISTONS HAVING A PISTON ROD EXTENDING EXTERNALLY OF ITS ASSOCIATED CYLINDER FOR INTERCONNECTION WITH THE MECHANISM TO BE RECIPROCATED.
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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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |