Patent US3675973A successfully refreshed from Google Patents.
US3675973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete breaker
Assignee: Individual
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Filing: 1970-08-10
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Granted: 1972-07-11
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Expires: 1990-08-10
Abstract
Abstract A body having a working end is secured at its opposite end to a coupling for engagement to a mobile hammer or the like. The working end is provided with three spaced, hexagonal breaking bars. Two of the bars are positioned at opposite edges of the working end, whereas the third bar is centrally positioned between them. The central bar extends outwardly from the other two bars a substantial distance so that it contacts the concrete or the like before the other two bars.
Inventors
- 👤 Archie Mottinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:32
CPC Classifications
B; B25; B25D; B25D17/00; B25D17/02; B28; B28D; B28D1/00; B28D1/26; E; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E01C23/124
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A breaker for concrete or the like comprising a body having a coupling end and a working end spaced along a longitudinal plane thereof, at least three spaced breaking bars secured to said working end and extending outwardly generally along said longitudinal plane, said bars each having a blunt terminal end, at least one of said bars being positioned between two outer bars and being of a substantially greater length than said two outer bars.
Claim 2
Dependent Claim
75 words
A breaker for concrete or the like comprising a body having a coupling end and a working end spaced along a longitudinal plane thereof, at least three spaced breaking bars secured to said working end and extending outwardly generally along said longitudinal plane, said bars each having a blunt terminal end, at least one of said bars being positioned between two outer bars and being of a substantially greater length than said two outer bars.
Claim 3
Dependent Claim
13 words
The breaker of claim 1 wherein said bars are integral with said body.
Claim 4
Dependent Claim
13 words
The breaker of claim 1 wherein said bars are hexagonal in transverse cross-section.
Claim 5
Dependent Claim
35 words
The breaker of claim 1 wherein said two outer bars are positioned generally at the opposite edges of said working end and said bar of greater length is centrally positioned between said two outer bars.
Claim 6
Dependent Claim
47 words
The breaker of claim 1 wherein said body comprises a rectangular shell and wherein said coupling end comprises a conventional rectangular breaking tool inserted within said shell and welded thereto whereby said body, working end, and breaking bars form an adapter for insertion over said coupling end.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |