US3172438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammer with sustained blow
Assignee: Individual
•
Filing: 1962-04-19
•
Granted: 1965-03-09
•
Expires: 1982-04-19
Abstract
No abstract record available.
Inventors
- 👤 Gianelli Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
B; B25; B25D; B25D1/00; B25D1/02; B25D1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A HAMMER COMPRISING A PRIMARY MASS HAVING A HEAD AND A HOLLOW SEALED CHAMBER THEREON AND DISPOSED TO MOVE IN A DIRECTION TO STRIKE A BLOW WITH THE HEAD, A SECONDARY MASS OF GREATER WEIGHT AND CARRIED BY SAID PRIMARY MASS WITHIN SAID CHAMBER DIRECTLY BEHIND SAID HEAD AND SPACED FROM THE LATTER, SAID SECONDARY MASS BEING ADAPTED TO MOVE LONGITUDINALLY THEREOF IN THE DIRECTION OF THE HAMMER BLOW, ENERGY TRANSMITTING LIQUID MEANS DISPOSED IN SAID CHAMBER BETWEEN SAID SECONDARY MASS AND SAID HEAD, AND MEANS RESTRICTING THE DISPLACEMENT OF THE LIQUID BY SAID SECONDARY MASS TO THEREBY APPLY A STRIKING BLOW FROM SAID SECONDARY MASS SIMULTANEOUSLY WITH AND AS A PART OF THE STRIKING BLOW OF SAID PRIMARY MASS AND TRANSMIT A CONTINUING HAMMER BLOW FROM SAID SECONDARY MASS THROUGH SAID LIQUID AND HEAD AFTER THE LATTER HAS DELIVERED SAID STRIKING BLOW.
Claim 2
Dependent Claim
143 words
A HAMMER COMPRISING A PRIMARY MASS HAVING A HEAD AND A HOLLOW SEALED CHAMBER THEREON AND DISPOSED TO MOVE IN A DIRECTION TO STRIKE A BLOW WITH THE HEAD, A SECONDARY MASS OF GREATER WEIGHT AND CARRIED BY SAID PRIMARY MASS WITHIN SAID CHAMBER DIRECTLY BEHIND SAID HEAD AND SPACED FROM THE LATTER, SAID SECONDARY MASS BEING ADAPTED TO MOVE LONGITUDINALLY THEREOF IN THE DIRECTION OF THE HAMMER BLOW, ENERGY TRANSMITTING LIQUID MEANS DISPOSED IN SAID CHAMBER BETWEEN SAID SECONDARY MASS AND SAID HEAD, AND MEANS RESTRICTING THE DISPLACEMENT OF THE LIQUID BY SAID SECONDARY MASS TO THEREBY APPLY A STRIKING BLOW FROM SAID SECONDARY MASS SIMULTANEOUSLY WITH AND AS A PART OF THE STRIKING BLOW OF SAID PRIMARY MASS AND TRANSMIT A CONTINUING HAMMER BLOW FROM SAID SECONDARY MASS THROUGH SAID LIQUID AND HEAD AFTER THE LATTER HAS DELIVERED SAID STRIKING BLOW.
References Cited (Backward Citations)
US2592013A
Cited
FR1163525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |