US3139944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fence post driver
Assignee: MARTENSEN ENTERPRISES Inc
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Filing: 1963-09-03
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Granted: 1964-07-07
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 John D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/26; E04H17/261; E04H17/263
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
A FENCE POST DRIVER COMPRISING: A GUIDING FRAME; A MOVABLE FRAME MOUNTED ON SAID GUIDING FRAME AND ARRANGED TO PERMIT RELATIVE MOTION BETWEEN SAID FRAMES; POST ENGAGING MEANS SECURED TO SAID MOVABLE FRAME FOR ENGAGING THE TOP OF A POST TO BE DRIVEN INTO THE GROUND; A ROTATABLE SHAFT MOUNTED ON SAID MOVABLE FRAME; FORCE TRANSMITTING MEANS SECURED TO SAID SHAFT FOR ROTATION THEREWITH; A STRIKER SLIDABLY ATTACHED TO SAID MOVABLE FRAME AND ADAPTED TO STRIKE SAID POST ENGAGING MEANS; A ROCKER ARM PIVOTALLY ATTACHED TO SAID STRIKER; A JOURNAL BLOCK SECURED TO SAID ROCKER ARM; AND A SECOND SHAFT JOURNALED IN SAID JOURNAL BLOCK AND SECURED TO SAID FORCE TRANSMITTING MEANS TO FORCE SAID STRIKER AGAINST SAID POST ENGAGING MEANS WHEN SAID FORCE TRANSMITTING MEANS IS ROTATED.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |