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US4044843A Expired / Lapsed US ⏱️ 0.0 years remaining

Tractor-mounted scraper

Assignee: Individual
•
Filing: 1976-04-22
•
Granted: 1977-08-30
•
Expires: 1996-04-22
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Abstract

Abstract A tractor-mounted scraper is disclosed in which the scraper blade has two scraping edges and is mounted in a box assembly having two side plates, the blade being mounted on pivots located near the lower edges of the side plates and near the outer edges of the side plates, remote from the tractor. The box assembly is mounted on one end of the tractor, on pivoted arms which are maintained parallel to each other. A power-operated tilting head is mounted rigidly on the parallel arms, and the side plates are rigidly mounted on the moving part of the tilting head by means of a transverse beam, so that the blade neither wanders from side-to-side with respect to the longitudinal axis of the tractor, nor is permitted to tilt with respect to the axis of the pivots by which the attachment is mounted to the tractor, except as permitted by the power-operated tilting head. A hydraulic cylinder is provided for (a) raising the blade and side plates out of contact with the ground, (b) pressing downwardly on the blade and side plate assembly so that the end of the tractor nearest the attachment is supported solely by the blade, and (c) permitting the blade to rest upon the ground, bearing the weight of the side plates, the beam, the tilting head, etc., but not bearing the weight of the tractor, when hydraulic cylinder is in its neutral, unpowered condition. A hydraulic cylinder is also provided for tilting the blade about its pivots, to lower one or the other of blade's two scraping edges.

Inventors

  • 👤 Arnold Emeral Holub

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 13:23
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/401; E02F3/76; E02F3/80; E02F3/815; E02F3/8155

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 256 words
A scraper attachment for a tractor, comprising: a scraper blade having a first scraping edge and a second scraping edge; blade carrier means pivotably mounted on carrier pivot means affixed to one end of said tractor; blade pivot means for pivotably mounting said blade in said blade carrier means, the location of said blade pivot means in said blade carrier means and the range of pivotal positions of said blade being such that either one of said scraping edges can be selectively positioned below the other and below the lower edge of said blade carrier means; and power-operated blade carrier positioning means for a. raising said blade carrier means and thus raising said blade out of contact with the ground when in a first, powered mode of operation, b. pivoting said blade carrier means downwardly about said carrier pivot means so that one end of said tractor is supported solely by said blade when in a second, powered mode of operation, and, c. permitting said blade to rest upon the ground, bearing the weight of said blade carrier means but not bearing the weight of said tractor, when in a third, unpowered mode of operation; said blade carrier means comprising a pair of planar side members the lower edges of which constitute said lower edges of said blade carrier means, said blade being located between said planar side members, and said blade pivot means being located near the lower edges of said side members and near the edges of said side members remote from said tractor.
Claim 2
Dependent Claim 256 words
A scraper attachment for a tractor, comprising: a scraper blade having a first scraping edge and a second scraping edge; blade carrier means pivotably mounted on carrier pivot means affixed to one end of said tractor; blade pivot means for pivotably mounting said blade in said blade carrier means, the location of said blade pivot means in said blade carrier means and the range of pivotal positions of said blade being such that either one of said scraping edges can be selectively positioned below the other and below the lower edge of said blade carrier means; and power-operated blade carrier positioning means for a. raising said blade carrier means and thus raising said blade out of contact with the ground when in a first, powered mode of operation, b. pivoting said blade carrier means downwardly about said carrier pivot means so that one end of said tractor is supported solely by said blade when in a second, powered mode of operation, and, c. permitting said blade to rest upon the ground, bearing the weight of said blade carrier means but not bearing the weight of said tractor, when in a third, unpowered mode of operation; said blade carrier means comprising a pair of planar side members the lower edges of which constitute said lower edges of said blade carrier means, said blade being located between said planar side members, and said blade pivot means being located near the lower edges of said side members and near the edges of said side members remote from said tractor.
Claim 3
Dependent Claim 62 words
A scraper attachment as claimed in claim 1, including power-operated tilting means for tilting said blade carrier means about an axis which is substantially horizontal and substantially normal to a vertical plane containing the axis of said blade pivot means when said tractor is standing on level ground and said power-operated blade carrier positioning means is in said third mode of operation.
Claim 4
Dependent Claim 28 words
A scraper attachment as claimed in claim 2, including power-operated blade pivoting means for selectively positioning said blade in selected pivotal positions in said range of pivotal positions.

References Cited (Backward Citations)

US1856148A Cited
US2657481A Cited
US2841897A Cited
US3034238A Cited
US3007265A Cited
US3590929A Cited
US3653451A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-08-29 1981-02-28 1981-08-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-08-29 1985-02-28 1985-08-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-08-29 1989-02-28 1989-08-30 $7700.00 Window Closed / Lapsed

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