Ripper assembly for tractor drawn scraper

• US 4,015,348 A
• Filed: 09/30/1975
• Issued: 04/05/1977
• Est. Priority Date: 09/30/1975
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Tractor Co (Caterpillar Incorporated)
• Inventors: Gee, James E., Stedman, Robert N.
• Primary Examiner(s): Eickholt, E. H.
• Application Number:
  US05/618,181
• Time in Patent Office: 553 Days
• Field of Search: 37/124, 37/126 R, 37/129, 37/DIG. 3, 37/DIG. 12, 37/117.5, 37/8, 172/784, 172/785, 172/317, 172/318, 172/297, 172/300-301, 172/304, 172/687, 172/691, 172/692, 172/694, 172/697, 172/701, 172/734, 172/744, 172/763
• US Class Current: 37/407
• CPC Class Codes: E02F 3/64 Buckets cars, i.e. having scraper bowls for cable scrapers E02F3/54 takes precedence; soil working machines in agriculture A01B
• CPC Class Codes: E02F 3/6454 Towed (i.e. pulled or pushed) scrapers
• CPC Class Codes: E02F 3/658 Cutting edge for graders or bulldozer blades E02F3/8152, E02F3/8155; teeth per se E02F9/28
• CPC Class Codes: E02F 3/961 with several digging elements or tools mounted on one machine for backhoes E02F3/964 takes precedence

Abstract

The invention is concerned with an improvement in a tractor drawn scraper wherein the scraper has a bowl with a back, a bottom, two sides and a forward cutting edge and a spreader forward of the cutting edge and supported by forward extensions of the bowl sides. A tractor is provided forward of the spreader for pulling the scraper and means are provided for raising and lowering the forward end of the scraper relative to the tractor. The improved ripper assembly of the present invention comprises a beam suspended generally vertically downwardly from the spreader and forwardly from the bowl, the beam having a plurality of ripper sockets extending laterally from it. Held within the ripper sockets are a plurality of ripper shanks. A plurality of ripper teeth are generally provided proceeding from the ripper shanks. Means are provided for adjusting the vertical separation between the beam and the spreader.

Claims

1. In an earth working machine which comprises a scraper having a bowl with a back, a bottom, two sides and a forward cutting edge, a spreader forward of said cutting edge and supported by forward extensions of said sides, a tractor forward of said spreader for pulling said scraper and means for raising and lowering a forward end of said scraper relative to said tractor, a ripper assembly which raises and lowers in fixed relation to said spreader and to said cutting edge on operation of said raising and lowering means comprising:

a beam suspended generally vertically downwardly fraom said spreader and generally forwardly from said bowl;

a plurality of ripper sockets extending laterally from said beam;

a plurality of ripper shanks held in said sockets;

a means for adjusting the vertical separation between said beam and said spreader;

a pair of telescoping means between said beam and said spreader pivotally attached to a respective one of said beam and said spreader; and

a pair of arms, each pivotally attached at a first end thereof to a respective side of said bowl and attached at a second end thereof to said beam generally at an end thereof, said pair of arms, sides of said bowl and a pair of telescoping means forming a pair of triangular braces for said ripper assembly.

2. A ripper assembly as in claim 1, wherein said telescoping means each comprise an internally threaded cylinder and a mating externally threaded post.

3. A ripper assembly as in claim 2, including a pair of gussets one extending between each of said arms and said beam.

4. A ripper assembly as in claim 3, wherein said sockets are spaced linearly along said beam with the outermost of said sockets being in approximate alignment with the outer edges of said bowl.

5. A ripper assembly as in claim 4, wherein said scraper is made self-loading by including a powered auger within said bowl.

6. A ripper assembly as in claim 4, including a plurality of ripper teeth one attached to each of said ripper shanks at a lower end thereof and extending forwardly therefrom.