Patent US1949917A successfully refreshed from Google Patents.
Patent US5024617A successfully refreshed from Google Patents.
US3709330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifter for vehicles
Assignee: Individual
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Filing: 1970-11-09
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Granted: 1973-01-09
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Expires: 1990-11-09
Abstract
Abstract A base supports a lifting frame by means of four parallel arms so the lifting frame may be raised and lowered. A hydraulic jack is connected between the base and the lifting frame to raise the frame. Cross rails on the frame support two lifting pads for movement toward and away from each other. Each pad has wheels rolling on the rails. Guides on the frame and the pads cooperate to keep the pads substantially parallel. Hydraulic jacks on the frame move the pads to and fro. At the end of each pad there is a stop extending above the pad to engage the side of a vehicle and twist the pad horizontally to interlock the guides and stop inward movement of the pad. The hydraulic jacks are combined with a pump and a pressure regulating valve to first cause the pads to move toward each other until stopped, then to lift the lifting frame.
Inventors
- 👤 V Wells
- 👤 H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/06; B66F7/08; B66F7/0641
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
266 words
In a lifter for vehicles having a base, a vehicle lifting frame mounted for movement up and down on said base and first power means for effecting said movement, the improvement comprising: a pair of vehicle lifting pads mounted on said lifting frame for horizontal movement toward and away from each other and for a limited second horizontal movement while moving toward and away from each other; a second power means connected to the lifting frame and to said pads to move said pads toward and away from each other; a vehicle engaging stop on and projecting above each pad, effective when moved against the adjacent side of a vehicle positioned over said lifting frame by movement of a pad toward the other pad, to give the first named pad its second horizontal movement; and cooperating means on the lifting frame and on each pad engaged by said second horizontal movement of the pad to stop further movement of that pad toward the other pad; said first power means comprising a hydraulic jack connected between the base and the lifting frame and said second power means comprising a hydraulic jack for each pad connecting that pad to the lifting frame; a pump supplying fluid under pressure to said hydraulic jacks; and a pressure responsive valve interposed between the pump and the jacks connecting the pads to the lifting frame operable to cut off fluid flow to said last named jacks when the fluid pressure to the valve reaches a predetermined level below the pressure necessary to cause the first power means to raise the lifting frame.
Claim 2
Dependent Claim
266 words
In a lifter for vehicles having a base, a vehicle lifting frame mounted for movement up and down on said base and first power means for effecting said movement, the improvement comprising: a pair of vehicle lifting pads mounted on said lifting frame for horizontal movement toward and away from each other and for a limited second horizontal movement while moving toward and away from each other; a second power means connected to the lifting frame and to said pads to move said pads toward and away from each other; a vehicle engaging stop on and projecting above each pad, effective when moved against the adjacent side of a vehicle positioned over said lifting frame by movement of a pad toward the other pad, to give the first named pad its second horizontal movement; and cooperating means on the lifting frame and on each pad engaged by said second horizontal movement of the pad to stop further movement of that pad toward the other pad; said first power means comprising a hydraulic jack connected between the base and the lifting frame and said second power means comprising a hydraulic jack for each pad connecting that pad to the lifting frame; a pump supplying fluid under pressure to said hydraulic jacks; and a pressure responsive valve interposed between the pump and the jacks connecting the pads to the lifting frame operable to cut off fluid flow to said last named jacks when the fluid pressure to the valve reaches a predetermined level below the pressure necessary to cause the first power means to raise the lifting frame.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |