US3230895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Externally engaging lifting jack frame
Assignee: Individual
•
Filing: 1963-05-20
•
Granted: 1966-01-25
•
Expires: 1983-05-20
Abstract
No abstract record available.
Inventors
- 👤 Stewart John Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:09
CPC Classifications
E; E01; E01B; E01B29/00; E01B29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A RAILROAD TRACK LIFTING JACK APPARATUS, MOUNTED ON THE FRAME OF A TRACK WORKING VEHICLE PROVIDED WITH RAIL ENGAGING CLAMPS, WHICH LIFTING JACK IS ADAPTED TO ENGAGE THE BALLAST EXTERNALLY AND ON EACH SIDE OF THE TRACK RAILS, COMPRISING A PAIR OF TRANSVERSELY SPACED JACKS EACH HAVING A BALLAST ENGAGING SKI MEMBER PIVOTALLY MOUNTED ON A PIVOT ON A DOWNWARDLY DEPENDING ROD; A FLUID PRESSURE OPERATED PISTON AND CYLINDER ARRANGEMENT FOR RECIPROCATING THE JACK ROD TO LOWER AND RAISE THE SKI MEMBER INTO AND OUT OF ENGAGEMENT WITH THE BALLAST; SAID SKI MEMBER BEING BIASED TO ADOPT A FIRST ANGULAR POSITION IN A VERTICAL PLANE ON ITS PIVOT RELATIVE TO THE JACK ROD WHEN THE SKI MEMBER IS OUT OF JACKING ENGAGEMENT WITH THE BALLAST AND TO BE MOVED, AGAINST THE BIAS, OUT OF SAID FIRST ANGULAR POSITION BY CONTACT WITH THE BALLAST; AND SWITCH MEANS FIXED RELATIVE TO THE FRAME FOR TERMINATING RAISING ACTION OF THE PISTON AND CYLINDER ARRANGEMENT AND OPERABLE BY THE SKI MEMBER WHEN IN A PREDETERMINED ANGULAR POSITION ON THE PIVOT.
Claim 2
Dependent Claim
176 words
A RAILROAD TRACK LIFTING JACK APPARATUS, MOUNTED ON THE FRAME OF A TRACK WORKING VEHICLE PROVIDED WITH RAIL ENGAGING CLAMPS, WHICH LIFTING JACK IS ADAPTED TO ENGAGE THE BALLAST EXTERNALLY AND ON EACH SIDE OF THE TRACK RAILS, COMPRISING A PAIR OF TRANSVERSELY SPACED JACKS EACH HAVING A BALLAST ENGAGING SKI MEMBER PIVOTALLY MOUNTED ON A PIVOT ON A DOWNWARDLY DEPENDING ROD; A FLUID PRESSURE OPERATED PISTON AND CYLINDER ARRANGEMENT FOR RECIPROCATING THE JACK ROD TO LOWER AND RAISE THE SKI MEMBER INTO AND OUT OF ENGAGEMENT WITH THE BALLAST; SAID SKI MEMBER BEING BIASED TO ADOPT A FIRST ANGULAR POSITION IN A VERTICAL PLANE ON ITS PIVOT RELATIVE TO THE JACK ROD WHEN THE SKI MEMBER IS OUT OF JACKING ENGAGEMENT WITH THE BALLAST AND TO BE MOVED, AGAINST THE BIAS, OUT OF SAID FIRST ANGULAR POSITION BY CONTACT WITH THE BALLAST; AND SWITCH MEANS FIXED RELATIVE TO THE FRAME FOR TERMINATING RAISING ACTION OF THE PISTON AND CYLINDER ARRANGEMENT AND OPERABLE BY THE SKI MEMBER WHEN IN A PREDETERMINED ANGULAR POSITION ON THE PIVOT.
References Cited (Backward Citations)
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Cited
US2926617A
Cited
US3143974A
Cited
US3103182A
Cited
US3119346A
Cited
US3111907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |