US3395324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state phase reversal protector for three phase hoist motor
Assignee: Columbus McKinnon Corp
•
Filing: 1965-11-12
•
Granted: 1968-07-30
•
Expires: 1985-11-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Donald M Rager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:22
CPC Classifications
H; H02; H02H; H02H11/00; H02H11/004; H02H7/00; H02H7/08; H02H7/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A CONTROL ASSEMBLY COMPRISING, IN COMBINATION A POLYPHASE MOTOR ADAPTED TO BE ACTUATED IN RELATIVELY REVERSED DIRECTIONS, TERMINAL MEANS FOR CONNECTION TO AN EXTERNAL POLYPHASE SOURCE, CONTROL MEANS FOR SAID MOTOR INCLUDING A TRANSFORMER HAVING A PRIMARY CONNECTED TO SAID TERMINAL MEANS AND A SECONDARY, A FIRST SWITCH IN THE TRANSFORMER SECONDARY CIRCUIT FOR CONNECTING SAID SAID MOTOR TO SAID TERMINAL MEANS TO OPERATE SAID MOTOR IN ONE DIRECTION AND A SECOND SWITCH IN THE TRANSFORMER SECONDARY CIRCUIT FOR CONNECTING SAID MOTOR TO SAID TERMINAL MEANS TO OPERATE SAID MOTOR IN THE OPPOSITE DIRECTION,
Claim 2
Dependent Claim
94 words
A CONTROL ASSEMBLY COMPRISING, IN COMBINATION A POLYPHASE MOTOR ADAPTED TO BE ACTUATED IN RELATIVELY REVERSED DIRECTIONS, TERMINAL MEANS FOR CONNECTION TO AN EXTERNAL POLYPHASE SOURCE, CONTROL MEANS FOR SAID MOTOR INCLUDING A TRANSFORMER HAVING A PRIMARY CONNECTED TO SAID TERMINAL MEANS AND A SECONDARY, A FIRST SWITCH IN THE TRANSFORMER SECONDARY CIRCUIT FOR CONNECTING SAID SAID MOTOR TO SAID TERMINAL MEANS TO OPERATE SAID MOTOR IN ONE DIRECTION AND A SECOND SWITCH IN THE TRANSFORMER SECONDARY CIRCUIT FOR CONNECTING SAID MOTOR TO SAID TERMINAL MEANS TO OPERATE SAID MOTOR IN THE OPPOSITE DIRECTION,
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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |