Patent US3159418A successfully refreshed from Google Patents.
US3159418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic and vacuum lifter
Assignee: Individual
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Filing: 1963-02-20
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Granted: 1964-12-01
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Expires: 1983-02-20
Abstract
No abstract record available.
Inventors
- 👤 Hansen Jphigen Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:16
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/02; B66C1/0293; B66C1/0231; H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
IN A LIFTING UNIT FOR LIFTING EITHER MAGNETIZABLE MATERIAL OR NON-MAGNETIZABLE MATERIAL, THE COMBINATION OF AN UPRIGHT ELECTROMAGNET HAVING A BOTTOM FACE TO ENGAGE MAGNETIZABLE MATERIAL, AN ANNULAR SUCTION CUP HAVING A RIGID BODY SURROUNDING SAID ELECTROMAGNET, SAID BODY OF THE CUP HAVING A RESILIENT LOWER END TO ENGAGE NON-MAGNETIZABLE MATERIAL, MEANS MOUNTING THE BODY OF SAID SUCTION CUP ON SAID ELECTROMAGNET FOR AXIAL SLIDING MOVEMENT TO DISPOSE SAID LOWER END OF THE SUCTION CUP EITHER ABOVE OR BELOW THE PLANE OF THE BOTTOM FACE OF THE ELECTROMAGNET, AND MEANS FOR THE INTERMITTENT DISPLACEMENT OF THE SUCTION CUP ON THE ELECTROMAGNET FOR ALTERNATELY USING THE ELECTROMAGNET OR THE SUCTION CUP, SAID MEANS FOR THE DISPLACEMENT OF SAID SUCTION CUP BEING FLUID PRESSURE-OPERATED AND INCLUDES AN ANNULAR CHAMBER BETWEEN OPPOSED PORTIONS OF SAID SUCTION CUP BODY AND SAID ELECTROMAGNET BODY, A FLUID PASSAGE IN SAID ELECTROMAGNET AND IN COMMUNICATION WITH SAID CHAMBER, AND MEANS TO SUPPLY A POSITIVE OR A NEGATIVE FLUID PRESSURE TO SAID PASSAGE TO CAUSE THE INTERMITTENT DISPLACEMENT OF THE SUCTION CUP ON THE ELECTROMAGNET
Claim 2
Dependent Claim
177 words
IN A LIFTING UNIT FOR LIFTING EITHER MAGNETIZABLE MATERIAL OR NON-MAGNETIZABLE MATERIAL, THE COMBINATION OF AN UPRIGHT ELECTROMAGNET HAVING A BOTTOM FACE TO ENGAGE MAGNETIZABLE MATERIAL, AN ANNULAR SUCTION CUP HAVING A RIGID BODY SURROUNDING SAID ELECTROMAGNET, SAID BODY OF THE CUP HAVING A RESILIENT LOWER END TO ENGAGE NON-MAGNETIZABLE MATERIAL, MEANS MOUNTING THE BODY OF SAID SUCTION CUP ON SAID ELECTROMAGNET FOR AXIAL SLIDING MOVEMENT TO DISPOSE SAID LOWER END OF THE SUCTION CUP EITHER ABOVE OR BELOW THE PLANE OF THE BOTTOM FACE OF THE ELECTROMAGNET, AND MEANS FOR THE INTERMITTENT DISPLACEMENT OF THE SUCTION CUP ON THE ELECTROMAGNET FOR ALTERNATELY USING THE ELECTROMAGNET OR THE SUCTION CUP, SAID MEANS FOR THE DISPLACEMENT OF SAID SUCTION CUP BEING FLUID PRESSURE-OPERATED AND INCLUDES AN ANNULAR CHAMBER BETWEEN OPPOSED PORTIONS OF SAID SUCTION CUP BODY AND SAID ELECTROMAGNET BODY, A FLUID PASSAGE IN SAID ELECTROMAGNET AND IN COMMUNICATION WITH SAID CHAMBER, AND MEANS TO SUPPLY A POSITIVE OR A NEGATIVE FLUID PRESSURE TO SAID PASSAGE TO CAUSE THE INTERMITTENT DISPLACEMENT OF THE SUCTION CUP ON THE ELECTROMAGNET
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |