US3816014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screeding apparatus
Assignee: Dow Chemical Co
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Filing: 1972-02-14
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Granted: 1974-06-11
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Expires: 1992-02-14
Abstract
Abstract Screeding apparatus adapted to be carried by a self propelled machine, for finishing concrete-like material to a certain degree of smoothness. The screeding unit is attached to its raising and lowering carrier from above by a floating single point at or near its forward end and by a pair of pivotally mounted bar-like members operating between the carrier and the screeding unit. Lateral movement is provided by a positioning member coupled between the carrier and the screeding unit. The screeder follows guide strips but is not carried by such strips.
Inventors
- 👤 A Klopf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:30
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/30; E01C19/34; E01C19/40; E01C19/402
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
199 words
Screeding apparatus adapted to be carried by a prime mover having arms for raising, lowering or tilting a load, comprising a mounting plate adapted to be coupled to said arms, a rigid cantilevered arm extending forward of said mounting plate and supported at an elevated position therefrom, a generally H-shaped frame comprising an elongated member having a transversely extending member at each end, said frame being supported from said cantilevered arm by a pneumatic cylinder coupled between said arm and said elongated member, a pair of screeder boards, said boards being flexibly coupled to the transversely extending frame members, means for vibrating said boards, means including a pressurized reservoir of gas coupled to said pneumatic cylinder for pressurizing said pneumatic cylinder, said reservoir being a part of the structure of said elongated member, a pair of barlike coupling elements, each of said bar-like coupling elements being pivotally coupled between said mounting plate and an end of said frame, said bar-like coupling elements being generally parallel to each other, and means pivotally coupled between said mounting plate and one of said transversely extending members of said frame for effecting lateral movement of said frame with respect to said mounTing plate.
Claim 2
Dependent Claim
199 words
Screeding apparatus adapted to be carried by a prime mover having arms for raising, lowering or tilting a load, comprising a mounting plate adapted to be coupled to said arms, a rigid cantilevered arm extending forward of said mounting plate and supported at an elevated position therefrom, a generally H-shaped frame comprising an elongated member having a transversely extending member at each end, said frame being supported from said cantilevered arm by a pneumatic cylinder coupled between said arm and said elongated member, a pair of screeder boards, said boards being flexibly coupled to the transversely extending frame members, means for vibrating said boards, means including a pressurized reservoir of gas coupled to said pneumatic cylinder for pressurizing said pneumatic cylinder, said reservoir being a part of the structure of said elongated member, a pair of barlike coupling elements, each of said bar-like coupling elements being pivotally coupled between said mounting plate and an end of said frame, said bar-like coupling elements being generally parallel to each other, and means pivotally coupled between said mounting plate and one of said transversely extending members of said frame for effecting lateral movement of said frame with respect to said mounTing plate.
Claim 3
Dependent Claim
37 words
Apparatus in accordance with claim 1, wherein said means for effecting lateral movement of said frame includes a fluid actuated cylinder pivotally coupled to said mounting plate and to a rigid arm fixedly coupled to said frame.
Claim 4
Dependent Claim
17 words
Apparatus in accordance with claim 1 wherein said pneumatic cylinder is pivotally coupled to said cantilevered arm.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |