US3239017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic trip control
Assignee: Shaffer Tool Works
•
Filing: 1962-11-16
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Granted: 1966-03-08
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Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Norval F Hazen
- 👤 Raymond E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:20
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/107; E21B31/113
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
IN A JAR MECHANISM: (A) A TUBULAR MANDREL UNIT INCLUDING A TUBULAR TRIP MANDREL; (B) A BARREL UNIT INCLUDING A TUBULAR BARREL PORTION TELESCOPICALLY RECEIVING THE UPPER PORTION OF THE MANDREL UNIT; (C) TRIP SPRING MEANS ON THE MANDREL UNIT AND OPERABLY CONNECTED TO THE BARREL SAID TRIP SPRING TRIPPING UNDER A PREDETERMINED FORCE FOR AFFECTING JARRING ACTION; (D) AND A HYDRAULIC TRIP RELEASE MEANS FOR CONTROLLING RELEASE OF SAID TRIP SPRING MEANS; (E) THE TRIP RELEASE MEANS HAVING MEANS THEREIN TO CONTROL THE OPERATION THEREOF AND INCLUDING MEANS TO OPERATE THE TRIP RELEASE MEANS UPON FAILURE OF THE OPERATION OF THE FIRST MENTIONED MEANS.
References Cited (Backward Citations)
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |