US3128674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple stage telescopic cylinders
Assignee: Commercial Shearing Inc
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Filing: 1962-06-25
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Granted: 1964-04-14
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Expires: 1982-06-25
Abstract
No abstract record available.
Inventors
- 👤 Leonard N Ganchar
- 👤 Petro John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:36
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A MULTISTAGE TELESCOPING CYLINDER UNIT COMPRISING A PLURALITY OF CONCENTRIC CYLINDERS, ONE ADAPTED TO NEST INSIDE THE NEXT ADJACENT ONE TO FORM A TELESCOPIC UNIT, A SOURCE OF FLUID UNDER PRESSURE, A PISTON MEMBER ADAPTED TO FIT THE SMALLEST OF SAID CYLINDERS, SAID SMALLEST CYLINDER RECEIVING FLUID UNDER PRESSURE TO EXTEND THE PISTON AXIALLY THEREOF, INLET MEANS IN THE PISTON COMMUNICATING WITH THE INTERIOR OF ALL OF THE CYLINDERS INTRODUCING FLUID UNDER PRESSURE INTO THE INTERIOR OF ALL OF SAID CYLINDERS EXCEPT THE SMALLEST CYLINDER WHEREBY THE CYLINDERS MAY BE EXPANDED, MEANS SUPPLYING A CONTINUOUS FLUID PRESSURE BETWEEN THE WALLS OF THE SEVERAL CYLINDERS CONSTANTLY URGING THEM TOWARDS THE CLOSED POSITION AND CONTROL MEANS SELECTIVELY DELIVERING FLUID FROM THE SOURCE OF FLUID TO THE SMALLEST CYLINDER AND THE CONCENTRIC CYLINDERS WHEREBY TO OVERRIDE THE CONSTANT PRESSURE URGING THE CYLINDERS TO THE CLOSED POSITION.
Claim 2
Dependent Claim
143 words
A MULTISTAGE TELESCOPING CYLINDER UNIT COMPRISING A PLURALITY OF CONCENTRIC CYLINDERS, ONE ADAPTED TO NEST INSIDE THE NEXT ADJACENT ONE TO FORM A TELESCOPIC UNIT, A SOURCE OF FLUID UNDER PRESSURE, A PISTON MEMBER ADAPTED TO FIT THE SMALLEST OF SAID CYLINDERS, SAID SMALLEST CYLINDER RECEIVING FLUID UNDER PRESSURE TO EXTEND THE PISTON AXIALLY THEREOF, INLET MEANS IN THE PISTON COMMUNICATING WITH THE INTERIOR OF ALL OF THE CYLINDERS INTRODUCING FLUID UNDER PRESSURE INTO THE INTERIOR OF ALL OF SAID CYLINDERS EXCEPT THE SMALLEST CYLINDER WHEREBY THE CYLINDERS MAY BE EXPANDED, MEANS SUPPLYING A CONTINUOUS FLUID PRESSURE BETWEEN THE WALLS OF THE SEVERAL CYLINDERS CONSTANTLY URGING THEM TOWARDS THE CLOSED POSITION AND CONTROL MEANS SELECTIVELY DELIVERING FLUID FROM THE SOURCE OF FLUID TO THE SMALLEST CYLINDER AND THE CONCENTRIC CYLINDERS WHEREBY TO OVERRIDE THE CONSTANT PRESSURE URGING THE CYLINDERS TO THE CLOSED POSITION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |