Patent US3249334A successfully refreshed from Google Patents.
US3249334A
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Hydraulic spike puller
Assignee: Nordberg Manufacturing Co
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Filing: 1964-03-02
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Granted: 1966-05-03
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Ervin M Sheperd
- 👤 Jr Edward H Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:08
CPC Classifications
E; E01; E01B; E01B29/00; E01B29/24; E01B29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A HYDRAULIC SPIKE PULLER TO BE USE ON A RAILROAD TRACK, A HOUSING TO BE DISPOSED GENERALLY VERTICALLY OVER A SPIKE TO BE PULLED, A PAIR OF JAWS PIVOTALLY MOUNTED RELATIVE TO EACH OTHER IN THE HOUSING TO BE MOVED BETWEEN A LOWER AND A RAISED POSITION, THE JAWS BEING CONSTRUCTED TO GRAB THE HEAD OF A SPIKE WHEN IN THE LOWER POSITION, POWER MEANS FOR RAISING AND LOWERING THE JAWS, AND CAM SURFACE MEANS AND A LINKAGE MEANS EFFECTIVE BETWEEN
Claim 2
Dependent Claim
82 words
IN A HYDRAULIC SPIKE PULLER TO BE USE ON A RAILROAD TRACK, A HOUSING TO BE DISPOSED GENERALLY VERTICALLY OVER A SPIKE TO BE PULLED, A PAIR OF JAWS PIVOTALLY MOUNTED RELATIVE TO EACH OTHER IN THE HOUSING TO BE MOVED BETWEEN A LOWER AND A RAISED POSITION, THE JAWS BEING CONSTRUCTED TO GRAB THE HEAD OF A SPIKE WHEN IN THE LOWER POSITION, POWER MEANS FOR RAISING AND LOWERING THE JAWS, AND CAM SURFACE MEANS AND A LINKAGE MEANS EFFECTIVE BETWEEN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |