US3344940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizing means for hydraulic cylinders
Assignee: Doosan Bobcat North America Inc
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Filing: 1964-12-28
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Granted: 1967-10-03
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 Glen W Burgess
- 👤 William A Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:15
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/22; B; B66; B66C; B66C19/00; B66C19/007; B66F; B66F7/00; B66F7/10; B66F7/16; B66F7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A MATERIAL HANDLING VEHICLES HAVING AT LEAST FOUR UPRIGHT HYDRAULIC CYLINDER MEANS MOUNTED IN SPACE AND SUBSTANTIALLY PARALLEL RELATION TO EACH OTHER BOTH LONGITUDINALLY AND TRANSVERSELY OF THE VEHICLE, EXTENSIBLE MEMBERS ASSOCIATED WITH SAID CYLINDER MEANS FOR ELEVATING LOAD-LIFTING MEANS OF THE VEHICLE, MEANS OPERATIVELY CONNECTING AT LEAST SOME OF SAID EXTENSIBLE MEMBERS TO EACH OTHER, SAID LATTER MEANS INCLUDING A DEVICE CONNECTED TO EACH OF SAID EXTENSIBLE MEMBERS AND TO A PORTION SPACED VEHICLE INTERMEDIATE EACH OF THE LONGITUDINALLY SPACED PAIRS OF SAID CYLINDER MEANS, EACH OF SAID DEVICES BEING MOVABLE DURING EXTENSION CONNECTING ADJACENT ENDS OF THE MEMBERS, VALVE MEANS CONNECTING ADJACENT ENDS OF THE RESPECTIVE PAIRS OF SAID DEVICES, FLUID PRESSURE SUPPLY MEANS CONNECTED TO SAID CYLINDER MEANS FOR ACTUTATING SAID EXTENSIBLE MEMBERS, SAID VALVE MEANS BEING MOUNTED TO BE ACTUATED BY SAID DEVICES IN PIVOTAL MOVEMENT DURING EXTENSION OF EXTENSIBLE MEMBERS.
Claim 2
Dependent Claim
146 words
IN A MATERIAL HANDLING VEHICLES HAVING AT LEAST FOUR UPRIGHT HYDRAULIC CYLINDER MEANS MOUNTED IN SPACE AND SUBSTANTIALLY PARALLEL RELATION TO EACH OTHER BOTH LONGITUDINALLY AND TRANSVERSELY OF THE VEHICLE, EXTENSIBLE MEMBERS ASSOCIATED WITH SAID CYLINDER MEANS FOR ELEVATING LOAD-LIFTING MEANS OF THE VEHICLE, MEANS OPERATIVELY CONNECTING AT LEAST SOME OF SAID EXTENSIBLE MEMBERS TO EACH OTHER, SAID LATTER MEANS INCLUDING A DEVICE CONNECTED TO EACH OF SAID EXTENSIBLE MEMBERS AND TO A PORTION SPACED VEHICLE INTERMEDIATE EACH OF THE LONGITUDINALLY SPACED PAIRS OF SAID CYLINDER MEANS, EACH OF SAID DEVICES BEING MOVABLE DURING EXTENSION CONNECTING ADJACENT ENDS OF THE MEMBERS, VALVE MEANS CONNECTING ADJACENT ENDS OF THE RESPECTIVE PAIRS OF SAID DEVICES, FLUID PRESSURE SUPPLY MEANS CONNECTED TO SAID CYLINDER MEANS FOR ACTUTATING SAID EXTENSIBLE MEMBERS, SAID VALVE MEANS BEING MOUNTED TO BE ACTUATED BY SAID DEVICES IN PIVOTAL MOVEMENT DURING EXTENSION OF EXTENSIBLE MEMBERS.
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |