Patent US3779609A successfully refreshed from Google Patents.
US3779609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete cutting machine
Assignee: Individual
•
Filing: 1972-10-27
•
Granted: 1973-12-18
•
Expires: 1992-10-27
Abstract
Abstract A machine for cutting transverse contraction joints in concrete highways has independently hydraulically controlled saws which may be hydraulically raised or lowered. The saws will always cut to the same depth with respect to the surface of the road and this depth may be controlled. The machine is itself hydraulically driven and has only one gasoline engine and hydraulic storage tank.
Inventors
- 👤 R James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:45
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/09; E01C23/0906; E01C23/0926; E01C23/0933
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A concrete cutting machine comprising a vehicle having: a rigid main frame; a rack gear means traversing the width of said frame; saw carriage means for sawing an elongated, straight slit of uniform depth in the concrete suspended from said rack gear means and including pinion gear means for driving said saw carriage means along said rack gear; said saw carriage means comprising a carriage frame, said pinion gear means, sawing means for sawing said slit, hydraulic means for raising and lowering said sawing means into and out of contact with the concrete; and depth setting means for ensuring a uniform depth of cut throughout the path of travel of said saw carriage means when said sawing means is in engagement with the concrete.
Claim 2
Dependent Claim
124 words
A concrete cutting machine comprising a vehicle having: a rigid main frame; a rack gear means traversing the width of said frame; saw carriage means for sawing an elongated, straight slit of uniform depth in the concrete suspended from said rack gear means and including pinion gear means for driving said saw carriage means along said rack gear; said saw carriage means comprising a carriage frame, said pinion gear means, sawing means for sawing said slit, hydraulic means for raising and lowering said sawing means into and out of contact with the concrete; and depth setting means for ensuring a uniform depth of cut throughout the path of travel of said saw carriage means when said sawing means is in engagement with the concrete.
Claim 3
Dependent Claim
73 words
A concrete cutting machine in accordance with claim 1, wherein: said rack gear means comprises two parallel rack gears traversing the width of said main frame; and said pinion gear means comprises a shaft, a pinion gear connected to each end of said shaft, each said pinion gear operably connected to one of said rack gears, aNd a hydraulic motor for driving said shaft; wherein said carriage frame is suspended from said shaft.
Claim 4
Dependent Claim
30 words
A concrete cutting machine in accordance with claim 1 wherein said sawing means comprises: a reversible, variable speed hydraulic motor; and a saw blade drivingly connected to said hydraulic motor.
Claim 5
Dependent Claim
93 words
A concrete cutting machine in accordance with claim 1 wherein said saw carriage means further comprises: a second sawing means connected to said carriage frame for sawing said slit in alignment with the cut of said first sawing means; a second hydraulic means for raising and lowering said second sawing means into and out of contact with the concrete; and a second depth setting means for ensuring a uniform depth of cut throughout the path of travel of said saw carriage means when said second sawing means is in engagement with the concrete.
Claim 6
Dependent Claim
99 words
A concrete cutting machine in accordance with claim 1 wherein said saw carrige means further includes: a blade box pivotally connected to said carriage frame and carrying said sawing means thereon, said blade box being connected to said hydraulic means whereby raising and lowering by said hydraulic means of said blade box will cause raising and lowering of said sawing means; spring means connected to said hydraulic means for urging said blade box toward the lowest position and for relieving tension on said saw means by allowing upward motion of said blade box with respect to said hydraulic means.
Claim 7
Dependent Claim
76 words
A concrete cutting machine in accordance with claim 5 wherein said depth setting means comprises: a cam roller; a pivotal support arm connected to said roller and pivotably connected to said blade box; depth set screw means for setting the angular position of said support arm with respect to said blade box whereby the vertical distance between the bottom of said cam roller and the bottom of said saw means will remain fixed at each setting.
Claim 8
Dependent Claim
44 words
A concrete setting machine in accordance with claim 1 further including: support wheels attached to said main frame; two hydraulic motors drivingly connected one each to two of said wheels; and means connected to said hydraulic motors for independently controlling each of said motors.
Claim 9
Dependent Claim
73 words
A concrete cutting means in accordance with claim 7, further including: a hydraulic system controllable by a single operator comprising: said hydraulic means for raising and lowering said sawing means; said hydraulic motors drivingly connected to said wheels; a hydraulic motor for driving said pinion gear means and therewithin; a variable speed, reversible hydraulic motor for driving said sawing means and therewithin; and pump means for driving said hydraulic means and hydraulic motors.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |