US3693722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fine grading device for rubber tire road grader
Assignee: BROHIGBU Ltd
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Filing: 1970-08-11
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Granted: 1972-09-26
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Expires: 1990-08-11
Abstract
Abstract A grading blade and parallel rotary auger are supported on an auxiliary frame transversely with respect to a grader vehicle from which the frame is supported with the auger being connected to the blade for unitary pivotal movement about a pivot point on the frame between the front of the blade and the rear of the auger in general vertical alignment with the cutting edge of the blade so that the height of the auger can be pivotally adjusted by hydraulic cylinder means with respect to the cutting edge of the blade for differing soil conditions by pivoting the auger and blade with there being a negligible vertical displacement of the cutting edge of the blade; an automatically operable control means actuates hydraulic cylinders supporting the auxiliary frame from the vehicle in response to signals from a guide line extending along the path of movement of the vehicle for maintaining the cutting edge of the blade at a given elevation with respect to the guide line regardless of the height of the auger with respect to the cutting edge of the blade as adjusted by the operator for differing soil conditions.
Inventors
- 👤 Robert L Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/78; E02F3/783; E02F3/7604; Y; Y10; Y10S; Y10S37/00; Y10S37/907
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
251 words
A highly accurate grading means supported on a main attachment frame supported on a power driven vehicle having a main frame and drive means for movement along a path to be graded, said grading means comprising elongated blade means having a lower cutting edge supported by pivotal support means connected to said main attachment frame, said blade means extending substantially transverse to the path of travel of said vehicle, linkage connecting means connected to and extending from said blade means, elongated rotary earth cutting auger means supported by and connected to said linkage connecting means having an axis of rotation parallel to said blade means positioned for rotation immediately forward of said blade means, control means for moving said auxiliary support frame vertically for maintaining the lower edge of the blade at a desired elevation, said pivotal support means supporting said blade means, said linkage connecting means and said rotary auger means for unitary pivotal movement about a pivot axis positioned forward of the front surface of said blade means between the front surface of said blade means and the axis of rotation of said rotary auger and in substantial vertical alignment with the lower cutting edge of said blade, and actuator means for unitarily pivoting said auger and said blade about said pivot axis for adjusting the height of said auger with respect to the surface being graded without any substantial change in the elevation of the lower cutting edge of said blade with respect to the surface being graded.
Claim 2
Dependent Claim
251 words
A highly accurate grading means supported on a main attachment frame supported on a power driven vehicle having a main frame and drive means for movement along a path to be graded, said grading means comprising elongated blade means having a lower cutting edge supported by pivotal support means connected to said main attachment frame, said blade means extending substantially transverse to the path of travel of said vehicle, linkage connecting means connected to and extending from said blade means, elongated rotary earth cutting auger means supported by and connected to said linkage connecting means having an axis of rotation parallel to said blade means positioned for rotation immediately forward of said blade means, control means for moving said auxiliary support frame vertically for maintaining the lower edge of the blade at a desired elevation, said pivotal support means supporting said blade means, said linkage connecting means and said rotary auger means for unitary pivotal movement about a pivot axis positioned forward of the front surface of said blade means between the front surface of said blade means and the axis of rotation of said rotary auger and in substantial vertical alignment with the lower cutting edge of said blade, and actuator means for unitarily pivoting said auger and said blade about said pivot axis for adjusting the height of said auger with respect to the surface being graded without any substantial change in the elevation of the lower cutting edge of said blade with respect to the surface being graded.
Claim 3
Dependent Claim
21 words
The invention of claim 1 wherein said earth-cutting auger includes a plurality of radially extending digger teeth and a spiral blade.
Claim 4
Dependent Claim
119 words
The invention of claim 2 wherein said pivotal support means supporting said blade means and rotary auger for unitary movement includes first and second vertically extending spaced pivot support plate means extending downwardly from said attachment frame along the rear side of said blade, pivot shoe means extending forwardly from the lower edge of each of said pivot support plate means through a respective aperture in said blade and terminating forwardly of the forward surface of said blade, a pivot pin means connecting the forward end of each of said pivot shoes to bracket plates extending forwardly from said blade so that said blade and auger are pivotally supported by said pin for pivotal movement by said actuator means.
Claim 5
Dependent Claim
120 words
The invention of claim 1 wherein said pivotal support means supporting said blade means and rotary auger for unitary movement includes first and second vertically extending spaced pivot support plate means extending downwardly from said attachment frame along the rear side of said blade, pivot shoe means extending forwardly from the lower edge of each of said pivot support plate means through a respective aperture in said blade and terminating forwardly of the forward surface of said blade, a pivot pin means connecting the forward end of each of said pivot shoes to bracket plates extending forwardly from said blade so that said blade and auger are pivotally supported by said pivot pin for pivotal movement by said actuator means.
Claim 6
Dependent Claim
46 words
The invention of claim 2 wherein said control means for moving said attachment frame Comprises first and second hydraulic cylinders connected between the main frame of the vehicle and said attachment frame whereby actuation of said cylinders serves to vertically move said blade and said auger.
Claim 7
Dependent Claim
108 words
The invention of claim 5 wherein said linkage connecting means upon which said rotary auger means is mounted for rotation comprises first and second auger support plates each respectively pivotally connected intermediate its end to each end of said blade for pivotal movement about an axis transverse to the path of movement of said vehicle with said auger being mounted for rotation on one end of said plates and adjustably extendable and lockable adjustment means connecting said blade and the other ends of said first and second auger support plates for fixedly locking the relative position of said auger and said blade in a desired position of adjustment.
Claim 8
Dependent Claim
116 words
The invention of claim 6 wherein said attachment frame means includes a transversely extending main cross piece, a semi-circular arcuate frame member connected adjacent each end of said transversely extending main cross piece and having its arcuate portion extending forwardly therefrom, draw bar means extending forwardly from a pivotal connection connecting said draw bar means to the middle of said main cross piece, pivotal connection means connecting the forward end of said draw bar to said vehicle, and connecting means connecting said forwardly extending portion of said arcuate frame to said draw bar means with said first and second hydraulic cylinders extending from said vehicle being connected to said arcuate frame for supporting said arcuate frame.
Claim 9
Dependent Claim
78 words
The invention of claim 7 wherein said means connecting said arcuate frame to said draw bar comprises removable pin means which, when removed, permits pivotal movement of said draw bar with respect to said arcuate frame and said transversely extending main cross piece to reduce the overall width of the grading means by permitting movement of the auger and blade to a canted position relative to the axis of the supporting vehicle for movement to a different location.
Claim 10
Dependent Claim
63 words
The invention of claim 8 wherein said draw bar comprises a forward portion consisting of first and second parallel frame members, a connector frame removably connected to the forward end of said parallel frame members and a pair of rear frame components extending parallelly from the upper surface of said forward parallel frame components for connection to said transversely extending main cross piece.
Claim 11
Dependent Claim
60 words
The invention of claim 1 wherein said actuator means for unitarily pivoting said auger and said blade about said pivot axis includes first and second hydraulic cylinder means connected between said attachment frame and said blade so that actuation of said first and second cylinder means serves to unitarily pivot said blade, said linkage connecting means and said rotary auger.
Claim 12
Dependent Claim
120 words
The invention of claim 10 wherein said pivotal support means supporting said blade means and rotary auger for unitary movement includes first and second vertically extending spaced pivot support plate means extending downwardly from said attachment frame along the rear side of said blade, pivot shoe means extending forwardly from the lower edge of each of said pivot support plate means through a respective aperture in said blade and terminating forwardly of the forward surface of said blade, a pivot pin means connecting the forward end of each of said pivot shoes to bracket plates extending forwardly from said blade so that said blade and auger are pivotally supported by said pivot pin for pivotal movement by said actuator means.
Claim 13
Dependent Claim
47 words
The invention of claim 11 wherein said control means for moving said attachment frame comprises first and second hydraulic cylinders connected between the main frame of the vehicle and said attachment frame whereby actuation of said cylinders serves to vertically move said blade and said auger unitarily.
Claim 14
Dependent Claim
109 words
The invention of claim 12 wherein said linkage connecting means Upon which said rotary auger means is mounted for rotation comprises first and second auger support plates each respectively pivotally connected intermediate its ends to each end of said blade for pivotal movement about an axis transverse to the path of movement of said vehicle with said auger being mounted for rotation on one end of said plates and adjustably extendable and lockable threaded adjustment means connecting said blade and the other ends of said first and second auger support plates for fixedly locking the relative position of said auger and said blade in a desired position of adjustment.
Claim 15
Dependent Claim
114 words
The invention of claim 13 wherein said frame means includes a transversely extending main cross piece, a semi-circular arcuate frame member connected adjacent each end of said transversely extending main cross piece and having its arcuate portion extending forwardly therefrom, draw bar means extending forwardly from a pivotal connection connecting said draw bar means to the middle of said main cross piece, pivotal connection means connecting the forward end of said draw bar to said vehicle, and connecting means connecting forwardly extending portion of said arcuate frame to said draw bar means with said first and second hydraulic cylinders extending from said vehicle being connected to said arcuate frame for supporting said arcuate frame.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |