US3329403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination hydraulic and pneumatic jacks
Assignee: Milwaukee Hydraulic Products Corp
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Filing: 1966-05-04
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Granted: 1967-07-04
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Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Donald H Juds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A HYDRAULIC AND PNEUMATIC JACK COMPRISING A BASE, A LIFTING ELEMENT, MEANS BETWEEN SAID BASE AND LIFTING ELEMENT SUPPORTING THE LATTER FOR EXTENSIBLE MOVEMENT AND INCLUDING A PNEUMATIC CHAMBER LOCATED TO REACT ON SAID LIFTING ELEMENT, MEANS FOR DIRECTING COMPRESSED AIR FROM AN INTERNAL SOURCE INTO SAID PNEUMATIC CHAMBER TO CAUSE SUCH EXTENSIBLE MOVEMENT, AN OPTIONALLY SELECTABLE HYDRAULIC RAM BETWEEN SAID BASE AND LIFTING ELEMENTS FOR CAUSING SUCH EXTENSIBLE MOVEMENT, AN HYDRAULIC CIRCUIT FOR SAID RAM INCLUDING A RESERVOIR, AND MEANS INCLUDING AN EXTERNALLY OPERABLE HYDRAULIC PUMP IN SAID HYDRAULIC CIRCUIT FOR CONTROLLING THE OPERATION OF SAID HYDRAULIC RAM IN CAUSING SUCH EXTENSIBLE MOVEMENT OF SAID LIFTING ELEMENT.
Claim 2
Dependent Claim
108 words
A HYDRAULIC AND PNEUMATIC JACK COMPRISING A BASE, A LIFTING ELEMENT, MEANS BETWEEN SAID BASE AND LIFTING ELEMENT SUPPORTING THE LATTER FOR EXTENSIBLE MOVEMENT AND INCLUDING A PNEUMATIC CHAMBER LOCATED TO REACT ON SAID LIFTING ELEMENT, MEANS FOR DIRECTING COMPRESSED AIR FROM AN INTERNAL SOURCE INTO SAID PNEUMATIC CHAMBER TO CAUSE SUCH EXTENSIBLE MOVEMENT, AN OPTIONALLY SELECTABLE HYDRAULIC RAM BETWEEN SAID BASE AND LIFTING ELEMENTS FOR CAUSING SUCH EXTENSIBLE MOVEMENT, AN HYDRAULIC CIRCUIT FOR SAID RAM INCLUDING A RESERVOIR, AND MEANS INCLUDING AN EXTERNALLY OPERABLE HYDRAULIC PUMP IN SAID HYDRAULIC CIRCUIT FOR CONTROLLING THE OPERATION OF SAID HYDRAULIC RAM IN CAUSING SUCH EXTENSIBLE MOVEMENT OF SAID LIFTING ELEMENT.
References Cited (Backward Citations)
US1465278A
Cited
US2926888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |