US3817644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for vibrating, leveling and screeding concrete in a form
Assignee: HAMILTON EQUIPMENT Co Inc 5900-C EAST BERRY ST FORT WORTH TX 76119 A TX CORP
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Filing: 1972-08-02
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Granted: 1974-06-18
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Expires: 1992-08-02
Abstract
Abstract A self-propelled, automated machine for operating over a form to which concrete is introduced, the main functions of the machine being to level, vibrate and screed the concrete to provide a concrete slab without voids, and especially a slab in which both upper and lower surfaces, as well as opposite side edges and other sectional configurations are finished.
Inventors
- 👤 C Matson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:18
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/29; B28B1/08; B28B1/093
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
A machine for vibrating, leveling and screeding concrete in a form having elongated parallel sides and a bottom, the sides providing tracks, comprising a main frame having guide means supporting the main frame on and for advance along the tracks, drive means for advancing the main frame, a front screed transverse to and spanning the tracks, front drawbar means articulately connecting said screed to the frame for advance therewith, a rear screed transverse to and spanning the tracks, rear drawbar means articulately connecting the rear screed to the frame for advance therewith, and each drawbar means extending downwardly and rearwardly from the frame to its screed so as to exert downwardly and rearwardly inclined draft forces on the respective screeds.
Claim 2
Dependent Claim
120 words
A machine for vibrating, leveling and screeding concrete in a form having elongated parallel sides and a bottom, the sides providing tracks, comprising a main frame having guide means supporting the main frame on and for advance along the tracks, drive means for advancing the main frame, a front screed transverse to and spanning the tracks, front drawbar means articulately connecting said screed to the frame for advance therewith, a rear screed transverse to and spanning the tracks, rear drawbar means articulately connecting the rear screed to the frame for advance therewith, and each drawbar means extending downwardly and rearwardly from the frame to its screed so as to exert downwardly and rearwardly inclined draft forces on the respective screeds.
Claim 3
Dependent Claim
130 words
A machine for vibrating, leveling and screeding concrete in a form having elongated parallel sides and a bottom rigidly connected to the sides, the sides providing tracks, comprising a main frame having guide means supporting the main frame on and for advance along the tracks, drive means for advancing the main frame, a front screed transverse to and spanning the tracks, means connecting said screed to the frame for advance therewith, a rear screed transverse to and spanning the tracks, means connecting the rear screed to the frame for advance therewith, means associated with and operative in advance of the front screed for leveling concrete introduced into the form ahead of said front screed, and form-vibrating means carried by the fraMe for advance therewith and engageable with the form sides.
Claim 4
Dependent Claim
130 words
A machine for vibrating, leveling and screeding concrete in a form having elongated parallel sides and a bottom rigidly connected to the sides, the sides providing tracks, comprising a main frame having guide means supporting the main frame on and for advance along the tracks, drive means for advancing the main frame, a front screed transverse to and spanning the tracks, means connecting said screed to the frame for advance therewith, a rear screed transverse to and spanning the tracks, means connecting the rear screed to the frame for advance therewith, means associated with and operative in advance of the front screed for leveling concrete introduced into the form ahead of said front screed, and form-vibrating means carried by the fraMe for advance therewith and engageable with the form sides.
Claim 5
Dependent Claim
23 words
The invention defined in claim 2, in which the form-vibrating means is operative to exert forces transverse to the length of the form.
Claim 6
Dependent Claim
32 words
The invention defined in claim 2, in which the form-vibrating means is operative to exert forces in planes transverse to and inclined downwardly and inwardly relative to the length of the form.
Claim 7
Dependent Claim
46 words
The invention defined in claim 2, especially for use with a form having at least one upwardly opening channel running lengthwise thereof, further characterized in that the form-vibrating means exerts forces in planes converging downwardly and inwardly and substantially intersecting a lower part of the channel.
Claim 8
Dependent Claim
174 words
A machine for vibrating, leveling and screeding concrete in a form having elongated parallel sides and a bottom, the sides providing tracks, comprising a main frame having guide means supporting the main frame on and for advance along the tracks, drive means for advancing the main frame, a front screed transverse to and spanning the tracks, a rear screed transverse to and spanning the tracks and spaced to the rear of the front screed, a front hitch element on the frame ahead of the front screed, an intermediate hitch element on the frame ahead of the rear screed, a rear hitch element on the frame behind the rear screed, a first drawbar connecting the front screed to the front hitch element, a second similar drawbar connecting the rear screed to the intermediate hitch element, said drawbars and hitch elements being so constructed and arranged the first and second drawbars are interchangeable respectively to the rear and intermediate hitch elements and to the rear and front screeds for operating the machine in the opposite direction.
Claim 9
Dependent Claim
174 words
A machine for vibrating, leveling and screeding concrete in a form having elongated parallel sides and a bottom, the sides providing tracks, comprising a main frame having guide means supporting the main frame on and for advance along the tracks, drive means for advancing the main frame, a front screed transverse to and spanning the tracks, a rear screed transverse to and spanning the tracks and spaced to the rear of the front screed, a front hitch element on the frame ahead of the front screed, an intermediate hitch element on the frame ahead of the rear screed, a rear hitch element on the frame behind the rear screed, a first drawbar connecting the front screed to the front hitch element, a second similar drawbar connecting the rear screed to the intermediate hitch element, said drawbars and hitch elements being so constructed and arranged the first and second drawbars are interchangeable respectively to the rear and intermediate hitch elements and to the rear and front screeds for operating the machine in the opposite direction.
Claim 10
Dependent Claim
20 words
The invention defined in claim 6, in which the drive means is reversible for selectively advancing and reversing the machine.
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |