US3254289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating mechanism for partitioning means and the like and motor control system
Assignee: Individual
•
Filing: 1962-05-28
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Granted: 1966-05-31
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Ray E Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1472
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
148 words
A SYSTEM FOR ELEVATING A PARATITION WHEREIN THE PORTIONS THEREOF ARE LIFTED SERIALLY SO THAT DURING EACH OPERATING CYCLE THE LOAD IS INCREASED AS ADDITIONAL PORTIONS ARE LIFTED, THE COMBINATION OF, AN ELECTRIC MOTOR WHICH IS ENERGIZED TO EFFECT THE ELEVATING MOVEMENT, CUT-OFF MEANS RESPONSIVE TO CHANGES IN THE LOAD ON SAID MOTOR AND INCLUDING MEANS TO STOP SAID MOTOR WHENEVER THE LOAD THEREON EXCEEDS A SET LEVEL, SAID CUT-OFF MEANS BEING ADJUSTABLE TO PERMIT ALTERATION OF SAID SET LEVEL, AND A SAFETY SYSTEM FO SAID MOTOR COMPRISING CONTROL MEANS OPERATING IN SYNCHRONISM WITH THE MOVEMENT OF SAID PARTITION WHEN THE LATTER IS MOVED BY SAID MOTOR, SAID CONTROL MEANS BEING COUPLED TO SAID CUT-OFF MEANS AND ACTING THROUGHOUT EACH OPERATING CYCLE TO CHANGE SAID SET LEVEL IN ACCORDANCE WITH A PREDETERMINED SCHEDULE CORRESPONDING TO THE PATTERN OF THE CHANGES IN THE ACTUAL LOAD DURING SAID OPERATING CYCLE.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |