Patent US3683762A successfully refreshed from Google Patents.
US3683762A
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Apparatus for making a rigid road which has a textured surface
Assignee: Cement and Concrete Association
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Filing: 1970-08-14
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Granted: 1972-08-15
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Expires: 1990-08-14
Abstract
Abstract A profile beam having a working surface constituted by alternate ridges and grooves is drawn, while being vibrated and whilst while to the application of a uniform downwardly directed force, across the surface of cement which has been laid to form a road, airplane runway or the like and which is still plastic, whereby parallel grooves are formed in said cement by the ridges.
Inventors
- 👤 David Payne Maynard
- 👤 John Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:44
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/22; E01C19/43
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
Apparatus for making a textured-surface rigid road of concrete or the like, comprising a gantry adapted to span at least a portion of a newly laid plastic concrete road, means supporting said gantry on a subgrade, a frame movably supported on said gantry, a profile beam having a groove-forming working surface suspended by tension springs from said frame, said groove-forming surface having rib means extending in the direction of movement of said frame and suspended profile beam, piston means between said frame and said profile beam for raising and lowering said beam relative to the frame, a flexible connection between said piston means and said profile beam, and vibrator means directly connected to said profile beam, whereby upon actuation of said vibrator means the profile beam fluidizes the underlying concrete and molds at least one groove therein while being floatingly supported by said tension springs.
Claim 2
Dependent Claim
145 words
Apparatus for making a textured-surface rigid road of concrete or the like, comprising a gantry adapted to span at least a portion of a newly laid plastic concrete road, means supporting said gantry on a subgrade, a frame movably supported on said gantry, a profile beam having a groove-forming working surface suspended by tension springs from said frame, said groove-forming surface having rib means extending in the direction of movement of said frame and suspended profile beam, piston means between said frame and said profile beam for raising and lowering said beam relative to the frame, a flexible connection between said piston means and said profile beam, and vibrator means directly connected to said profile beam, whereby upon actuation of said vibrator means the profile beam fluidizes the underlying concrete and molds at least one groove therein while being floatingly supported by said tension springs.
Claim 3
Dependent Claim
25 words
An apparatus as claimed in claim 1, wherein said tension springs are substantially constant force springs which floatingly support said profile beam from the frame.
Claim 4
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein said vibrator is mounted upon said profile beam.
Claim 5
Dependent Claim
34 words
An apparatus as claimed in claim 1, wherein said flexible connection between said piston and said profile beam comprises a set of links pivoted to each other at their ends and forming a parallelogram.
Claim 6
Dependent Claim
53 words
An apparatus according to claim 1, wherein said frame comprises a pair of parallel A-shaped members spaced from one another, said profile beam being suspended between said A-shaped members by said tension springs, piston means and flexible connection, and by flexible elements connecting said profile beam to the legs of said A-shaped members.
Claim 7
Dependent Claim
35 words
An apparatus as claimed in claim 1, wherein said frame is supported by a carriage movable on said gantry, and wherein a reversible motor is provided to drive said carriage at constant or varied speeds.
Claim 8
Dependent Claim
53 words
An apparatus as claimed in claim 6, wherein limit switches are provided which are tripped by the carriage when the carriage reaches the end of a respective traverse of the gantry, said limit switches being operative to stop said carriage and said vibrator means at the end of a traverse of the gantry.
Claim 9
Dependent Claim
36 words
Apparatus as claimed in claim 6, wherein said carriage is driven by said reversible motor through chains and sprockets keyed to transverse shafts carrying guide wheels whose single circumferential flanges extend into a straight guide slot.
Claim 10
Dependent Claim
66 words
Apparatus as claimed in claim 1, wherein the working surface of said profile beam consists of downwardly directed parallel ridges which between them define parallel troughs, those marginal portions of the beam which extend in directions substantially normal to the parallel ridges being canted upwardly towards said gantry so as to reduce the incidence of said marginal portions digging into and ploughing up said plastic concrete.
Claim 11
Dependent Claim
13 words
Apparatus as claimed in claim 9, wherein said ridges are of rectangular section.
Claim 12
Dependent Claim
30 words
Apparatus as claimed in claim 9, wherein at least that part of said profile beam which provides said working surface thereof is made out of a solid block of metal.
Claim 13
Dependent Claim
30 words
Apparatus as claimed in claim 1, including wheels on said gantry, power means operable to effect power-assisted travel of said apparatus in each of two alternative, opposite directions of travel.
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |