US3308730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable rock and frost breaker and tamper
Assignee: Individual
•
Filing: 1964-08-07
•
Granted: 1967-03-14
•
Expires: 1984-08-07
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Vorwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:28
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E01C23/124
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A GROUND AND ROCK IMPACT BIT ASSEMBLY COMPRISING AN ELONGATED VERTICALLY DISPOSED IMPACT MEMBER INCLUDING MEANS AT ITS LOWERMOST END ADAPTED TO IMPACT WITH HARD GROUND AND ROCK FORMATIONS, A PAIR OF MOUNTING MEMBERS CARRIED BY SAID IMPACT MEMBER INCLUDING MEANS ADAPTED FOR QUICK RELEASABLE SECUREMENT TO A LIFTING MEMBER, ONE OF SAID MEMBERS DEFINING A GUIDE MEMBER AND THE OTHER OF SAID MEMBERS DEFINING A FOLLOWER MEMBER ENGAGED WITH THE GUIDE MEMBER FOR GUIDED LIMITED LONGITUDINAL RECIPROCAL MOVEMENT OF SAID IMPACT MEMBER RELATIVE TO SAID MOUNTING MEMBER, SAID GUIDE MEMBER INCLUDING A PAIR OF OPPOSING ABUTMENT SURFACES BETWEEN WHICH SAID FOLLOWER MEMBER IS DISPOSED AND RECIPROCAL, AND RESILIENT DEFORMABLE MEMBERS DISPOSED BETWEEN SAID OPPOSING SURFACES AND SAID FOLLOWER MEMBER FOR CUSHIONING THE IMPACT OF THE LOWER END OF SAID IMPACT MEMBER WITH THE GROUND UPON RAPID LOWERING OF SAID MOUNTING MEANS.
Claim 2
Dependent Claim
142 words
A GROUND AND ROCK IMPACT BIT ASSEMBLY COMPRISING AN ELONGATED VERTICALLY DISPOSED IMPACT MEMBER INCLUDING MEANS AT ITS LOWERMOST END ADAPTED TO IMPACT WITH HARD GROUND AND ROCK FORMATIONS, A PAIR OF MOUNTING MEMBERS CARRIED BY SAID IMPACT MEMBER INCLUDING MEANS ADAPTED FOR QUICK RELEASABLE SECUREMENT TO A LIFTING MEMBER, ONE OF SAID MEMBERS DEFINING A GUIDE MEMBER AND THE OTHER OF SAID MEMBERS DEFINING A FOLLOWER MEMBER ENGAGED WITH THE GUIDE MEMBER FOR GUIDED LIMITED LONGITUDINAL RECIPROCAL MOVEMENT OF SAID IMPACT MEMBER RELATIVE TO SAID MOUNTING MEMBER, SAID GUIDE MEMBER INCLUDING A PAIR OF OPPOSING ABUTMENT SURFACES BETWEEN WHICH SAID FOLLOWER MEMBER IS DISPOSED AND RECIPROCAL, AND RESILIENT DEFORMABLE MEMBERS DISPOSED BETWEEN SAID OPPOSING SURFACES AND SAID FOLLOWER MEMBER FOR CUSHIONING THE IMPACT OF THE LOWER END OF SAID IMPACT MEMBER WITH THE GROUND UPON RAPID LOWERING OF SAID MOUNTING MEANS.
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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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |