Patent US3147829A successfully refreshed from Google Patents.
US3147829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telescoping elevating support
Assignee: SEALING CORP OF AMERICA
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Filing: 1960-06-15
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Granted: 1964-09-08
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Expires: 1980-06-15
Abstract
No abstract record available.
Inventors
- 👤 Leon A Johnson
- 👤 Jack G Mckenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:56
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/18; E04H12/182; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
ELEVATING MEANS INCLUDING A PLURALITY OF TELESCOPING SECTIONS EACH COMPRISING A HOLLOW TUBE WITH A LATCHING COLLAR AT ITS UPPER END AND A PISTON AT ITS LOWER END, EACH OF SAID SECTIONS BEING MOVABLE BETWEEN A TELESCOPED POSITION WHERE THE PISTONS CONTACT EACH OTHER AND AN EXTENDED POSITION WHERE EACH PISTON IS LOCATED WITHIN THE COLLAR OF THE OUTWARDLY ADJACENT SECTION; MEANS CARRIED BY EACH OF SAID PISTONS MOVABLE BETWEEN A RELEASED POSITION AND A LATCHING POSITION FOR LATCHING THAT PISTON TO THE OUTWARDLY ADJACENT COLLAR WHEN WITHIN THAT COLLAR; ACTUATION MEANS CARRIED BY EACH OF SAID PISONS FOR ACTUATING SAID LATCHING MEANS, SAID ACTUATION MEANS BEING RESPONSIVE TO THE SEPARATION OF TWO ADJACENT PISTONS TO MOVE THE LATCHING MEANS OF THE LOWER OF THE TWO ADJACENT PISTONS INTO SAID LATCHING POSITION AND BEING RESPONSIVE TO CONTACT BETWEEN TWO ADJACENT PISTONS TO ALLOW THE LATCHING MEANS OF THE LOWER OF THE TWO ADJACENT PISTONS TO MOVE INTO SAID RELEASED POSITION, AND MEANS FOR RAISING EACH SAID SECTION FROM THE SECTION OUTWARDLY ADJACENT THERETO SEQUENTIALLY IN AN ORDER COMMENCING WITH THE OUTERMOST OF SAID SECTIONS.
Claim 2
Dependent Claim
184 words
ELEVATING MEANS INCLUDING A PLURALITY OF TELESCOPING SECTIONS EACH COMPRISING A HOLLOW TUBE WITH A LATCHING COLLAR AT ITS UPPER END AND A PISTON AT ITS LOWER END, EACH OF SAID SECTIONS BEING MOVABLE BETWEEN A TELESCOPED POSITION WHERE THE PISTONS CONTACT EACH OTHER AND AN EXTENDED POSITION WHERE EACH PISTON IS LOCATED WITHIN THE COLLAR OF THE OUTWARDLY ADJACENT SECTION; MEANS CARRIED BY EACH OF SAID PISTONS MOVABLE BETWEEN A RELEASED POSITION AND A LATCHING POSITION FOR LATCHING THAT PISTON TO THE OUTWARDLY ADJACENT COLLAR WHEN WITHIN THAT COLLAR; ACTUATION MEANS CARRIED BY EACH OF SAID PISONS FOR ACTUATING SAID LATCHING MEANS, SAID ACTUATION MEANS BEING RESPONSIVE TO THE SEPARATION OF TWO ADJACENT PISTONS TO MOVE THE LATCHING MEANS OF THE LOWER OF THE TWO ADJACENT PISTONS INTO SAID LATCHING POSITION AND BEING RESPONSIVE TO CONTACT BETWEEN TWO ADJACENT PISTONS TO ALLOW THE LATCHING MEANS OF THE LOWER OF THE TWO ADJACENT PISTONS TO MOVE INTO SAID RELEASED POSITION, AND MEANS FOR RAISING EACH SAID SECTION FROM THE SECTION OUTWARDLY ADJACENT THERETO SEQUENTIALLY IN AN ORDER COMMENCING WITH THE OUTERMOST OF SAID SECTIONS.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |