US3398645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple extension apparatus
Assignee: Grove US LLC
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Filing: 1966-11-30
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Granted: 1968-08-27
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Expires: 1986-11-30
Abstract
No abstract record available.
Inventors
- 👤 Harold K Nansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:41
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/64; B66C23/70; B66C23/701; B66C23/708
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A MULTIPLE EXTENSION APPARATUS COMPRISING, IN COMBINATION, A FIRST HOLLOW SECTION ONE END OF WHICH IS ADAPTED TO BE SECURED TO A STRUCTURE, A SECOND HOLLOW SECTION SLIDABLY MOUNTED IN SAID FIRST SECTION, A THIRD HOLLOW SECTION SLIDABLY MOUNTED IN SAID SECOND SECTION, FIRST FLUID ACTUATED MEANS OPERABLY CONNECTED TO SAID FIRST AND SECOND SECTIONS AND OPERABLE TO MOVE SAID FIRST AND SECOND SECTIONS LONGITUDINALLY RELATIVE TO EACH OTHER, SECOND FLUID ACTUATED MEANS OPERABLY CONNECTED TO SAID SECOND AND THIRD SECTION AND OPERABLE TO MOVE SAID SECOND AND THIRD SECTIONS LONGITUDINALLY OF EACH OTHER, CONTROL MEANS FOR DIRECTING FLUID UNDER PRESSURE TO SAID FIRST AND SECOND MEANS; WHEREIN THE IMPROVEMENT COMPRISES, LATCH MEANS FOR RELEASABLY LOCKING SAID SECOND AND THIRD SECTIONS IN A RETRACTED POSITION, AND ACTUATING MEANS ON SAID FIRST SECTION FOR ENGAGING SAID LATCH MEANS WHEN SAID SECOND SECTION IS IN ITS EXTENDED POSITION TO PERMIT EXTENSION OF SAID THIRD SECTION RELATIVE TO SAID SECOND SECTION.
Claim 2
Dependent Claim
158 words
A MULTIPLE EXTENSION APPARATUS COMPRISING, IN COMBINATION, A FIRST HOLLOW SECTION ONE END OF WHICH IS ADAPTED TO BE SECURED TO A STRUCTURE, A SECOND HOLLOW SECTION SLIDABLY MOUNTED IN SAID FIRST SECTION, A THIRD HOLLOW SECTION SLIDABLY MOUNTED IN SAID SECOND SECTION, FIRST FLUID ACTUATED MEANS OPERABLY CONNECTED TO SAID FIRST AND SECOND SECTIONS AND OPERABLE TO MOVE SAID FIRST AND SECOND SECTIONS LONGITUDINALLY RELATIVE TO EACH OTHER, SECOND FLUID ACTUATED MEANS OPERABLY CONNECTED TO SAID SECOND AND THIRD SECTION AND OPERABLE TO MOVE SAID SECOND AND THIRD SECTIONS LONGITUDINALLY OF EACH OTHER, CONTROL MEANS FOR DIRECTING FLUID UNDER PRESSURE TO SAID FIRST AND SECOND MEANS; WHEREIN THE IMPROVEMENT COMPRISES, LATCH MEANS FOR RELEASABLY LOCKING SAID SECOND AND THIRD SECTIONS IN A RETRACTED POSITION, AND ACTUATING MEANS ON SAID FIRST SECTION FOR ENGAGING SAID LATCH MEANS WHEN SAID SECOND SECTION IS IN ITS EXTENDED POSITION TO PERMIT EXTENSION OF SAID THIRD SECTION RELATIVE TO SAID SECOND SECTION.
References Cited (Backward Citations)
US3212604A
Cited
US3250182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |