US4309126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for separating concrete from steel
Assignee: CONCRETE RECYCLERS Inc A MN Corp
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Filing: 1980-04-17
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Granted: 1982-01-05
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Expires: 2000-04-17
Abstract
Abstract Apparatus for pulverizing concrete sheets such as roadways, and for separating reinforcing steel from concrete, having an anvil for positioning under and in supporting relationship to the concrete, a hammer for repeatedly striking the concrete from above, and a drive mechanism for imparting relative movement between the concrete and the anvil and hammer combination.
Inventors
- 👤 Deems M. Pfaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:51
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E01C23/124; E04; E04G; E04G23/00; E04G23/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
60 words
An apparatus for pulverizing concrete and like material, comprising (a) anvil means for positioning under and in supporting relationship to said concrete; (b) hammer means for repeatedly striking said concrete from above, said hammer means being positioned over said concrete and said anvil means; and (c) means for forcing movement of said hammer and anvil means relative to said concrete.
Claim 2
Independent Claim
60 words
An apparatus for pulverizing concrete and like material, comprising (a) anvil means for positioning under and in supporting relationship to said concrete; (b) hammer means for repeatedly striking said concrete from above, said hammer means being positioned over said concrete and said anvil means; and (c) means for forcing movement of said hammer and anvil means relative to said concrete.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1, further comprising a frame assembly attached to said anvil means and upon which said hammer means is attached.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein said hammer means further comprises at least one vertically actuated hammer, movably attached to said frame assembly.
Claim 5
Dependent Claim
22 words
The apparatus of claim 1, wherein said means for forcing movement further comprises a motive power device coupled to said anvil means.
Claim 6
Dependent Claim
15 words
The apparatus of claim 4, wherein said motive power drive further comprises a track-driven vehicle.
Claim 7
Dependent Claim
19 words
The apparatus of claim 1, wherein said anvil means further comprises a wedge-shape structure for sliding under said concrete.
Claim 8
Dependent Claim
27 words
The apparatus of claim 6, wherein said wedge-shape structure further comprises a steel wedge having a width dimension at least equal to the width of said concrete.
Claim 9
Dependent Claim
24 words
The apparatus of claim 6, further comprising an endless conveyor attached to said wedge-shaped structure proximate and parallel to an edge of said concrete.
Claim 10
Dependent Claim
26 words
The apparatus of claim 8, further comprising a frame assembly attached to said wedge-shaped structure, and including a member bridging said concrete in spaced apart relation.
Claim 11
Dependent Claim
17 words
The apparatus of claim 9, further comprising at least one movable carriage attached to said bridging member.
Claim 12
Dependent Claim
18 words
The apparatus of claim 10, wherein said hammer means further comprises a hydraulically-actuated hammer attached to said carriage.
Claim 13
Dependent Claim
23 words
The apparatus of claim 11, further comprising power drive means attached to said frame assembly and in drive coupling arrangement to said carriage.
Claim 14
Dependent Claim
24 words
The apparatus of claim 12, further comprising guide means attached to said wedge-shaped structure for guiding relative movement of said structure and said concrete.
Claim 15
Dependent Claim
17 words
The apparatus of claim 13, wherein said means for forcing relative movement further comprises a track-driven vehicle.
Claim 16
Dependent Claim
20 words
The apparatus of claim 14, wherein said track-driven vehicle further comprises a shield attached over the top of said vehicle.
Claim 17
Dependent Claim
15 words
The apparatus of claim 15, further comprising means for towing attached to said wedge-shaped structure.
Claim 18
Independent Claim
117 words
An apparatus for pulverizing concrete on roadways, and for separating same from reinforcing steel embedded therein, comprising (a) a movable wedge-shape structure for urging beneath said concrete; (b) a frame assembly attached to said wedge-shape structure and having a transverse beam bridging said concrete; (c) at least one movable carriage carried by said beam, and having a reciprocable hammer attached thereto; (d) means for moving said carriage along said beam to a plurality of positions over said concrete; (e) motive power means attached to said wedge-shape structure for sliding said structure under said concrete and along said roadway; and (f) means for reciprocating said hammer against said concrete while said concrete is supported on said wedge-shape structure.
Claim 19
Independent Claim
117 words
An apparatus for pulverizing concrete on roadways, and for separating same from reinforcing steel embedded therein, comprising (a) a movable wedge-shape structure for urging beneath said concrete; (b) a frame assembly attached to said wedge-shape structure and having a transverse beam bridging said concrete; (c) at least one movable carriage carried by said beam, and having a reciprocable hammer attached thereto; (d) means for moving said carriage along said beam to a plurality of positions over said concrete; (e) motive power means attached to said wedge-shape structure for sliding said structure under said concrete and along said roadway; and (f) means for reciprocating said hammer against said concrete while said concrete is supported on said wedge-shape structure.
References Cited (Backward Citations)
US569573A
Cited
US1275742A
Cited
US1715724A
Cited
US1745100A
Cited
US1945322A
Cited
US2562899A
Cited
US2768794A
Cited
US3732023A
Cited
US3670971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-04 | 1985-07-06 | 1986-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-04 | 1989-07-06 | 1990-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-04 | 1993-07-06 | 1994-01-05 | $7700.00 | Window Closed / Lapsed |