Patent US3231028A successfully refreshed from Google Patents.
US3231028A
Expired / Lapsed
US
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Multi-operational percussive tools
Assignee: WARSOP POWER TOOLS Ltd
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Filing: 1963-01-17
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Granted: 1966-01-25
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Expires: 1983-01-17
Abstract
No abstract record available.
Inventors
- 👤 Alcock John Forster
- 👤 Hoare James Albert
- 👤 Snowden Eric Mcivor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:58
CPC Classifications
E; E21; E21B; E21B6/00; E21B6/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18248; Y10T74/18256
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN AN ENGINE-POWERED PERCUSSIVE TOOL HAVING A CHUCK TO RECEIVE A TOOL BIT, AND A ROTARY DRIVE MECHANISM FOR INTERMITTENTLY ROTATING THE CHUCK IN ONE DIRECTION, INCLUDING A MEMBER WHICH IS DRIVEN BY THE ENGINE AND WHICH PERFORMS BACK-AND-FORTH MOVEMENTS THROUGH A PREDETERMINED PATH, THE IMPROVEMENT COMPRISING A DRIVETRANSMITTING FOLLOWER ENGAGEABLE WITH SAID MEMBER, A SPRING BIASAING THE FOLLOWER TOWARDS ENGAGEMENT WITH SAID MEMBER, AND AN ACTUATING MEMBER FOR MOVING THE FOLLOWER OUT OF THE RANGE OF SAID FIRST-MENTIONED MEMBER, AGAINST THE ACTION OF THE BIASING SPRING, WHEREBY THE DRIVE CAN BE DISCONTINUED.
Claim 2
Dependent Claim
93 words
IN AN ENGINE-POWERED PERCUSSIVE TOOL HAVING A CHUCK TO RECEIVE A TOOL BIT, AND A ROTARY DRIVE MECHANISM FOR INTERMITTENTLY ROTATING THE CHUCK IN ONE DIRECTION, INCLUDING A MEMBER WHICH IS DRIVEN BY THE ENGINE AND WHICH PERFORMS BACK-AND-FORTH MOVEMENTS THROUGH A PREDETERMINED PATH, THE IMPROVEMENT COMPRISING A DRIVETRANSMITTING FOLLOWER ENGAGEABLE WITH SAID MEMBER, A SPRING BIASAING THE FOLLOWER TOWARDS ENGAGEMENT WITH SAID MEMBER, AND AN ACTUATING MEMBER FOR MOVING THE FOLLOWER OUT OF THE RANGE OF SAID FIRST-MENTIONED MEMBER, AGAINST THE ACTION OF THE BIASING SPRING, WHEREBY THE DRIVE CAN BE DISCONTINUED.
References Cited (Backward Citations)
US2764138A
Cited
US3074381A
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 |