Apparatus and method for retaining a grader blade

• US 5,687,800 A
• Filed: 12/11/1996
• Issued: 11/18/1997
• Est. Priority Date: 12/11/1996
• Status: Expired due to Fees

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Wilkening, Kevin J.
• Primary Examiner(s): Melius, Terry Lee
• Assistant Examiner(s): PEZZUTO, ROBERT ERIC
• Application Number:
  US08/762,689
• Time in Patent Office: 342 Days
• Field of Search: 172/272, 172/273, 172/274, 172/275, 172/305, 172/476, 172/507, 172/667, 172/673, 172/719, 172/741, 172/797, 172/781, 172/811, 414/138 C, 414/145 A, 403/23, 403/24, 403/374, 280/456 R, 280/460 R
• US Class Current: 172/811
• CPC Class Codes: E02F 3/8157 Shock absorbers; Supports, e.g. skids, rollers; Devices for compensating wear-and-tear, or the like

Abstract

An apparatus for retaining a grader blade includes a support bracket, a first upper retainer secured to the support bracket and a second upper retainer secured to the support bracket. The apparatus also includes a first lower retainer secured to the support bracket, the first lower retainer being movable relative to the first upper retainer, and a second lower retainer secured to the support bracket, the second lower retainer being movable relative to the second upper retainer. The apparatus further includes a first adjustment member which contacts the first lower retainer, wherein rotation of the first adjustment member causes movement of the first lower retainer relative to the first upper retainer, and a second adjustment member which contacts the second lower retainer, wherein rotation of the second adjustment member causes movement of the second lower retainer relative to the second upper retainer. A method of retaining a grader blade relative to a support bracket is also disclosed.

Claims

1. An apparatus for retaining a grader blade having upper and lower blade rails, comprising:

support bracket;

a first retainer secured to said support bracket and being positionable in contact with one of said upper and lower blade rails;

a second retainer movable relative to said first retainer and being positionable in contact with the other of said upper and lower blade rails, said first retainer and said second retainer cooperatly to secure said grader blade in fixed relation to said support bracket; and

an adjustment member which contacts said second retainer, said adjustment member having an opening extending therethrough, said opening being eccentrically located relative to a center C of said adjustment member, adjustment member being rotatable in a first direction to cause said second retainer to move towards said first retainer, and in a second direction to cause said second retainer to move away from said first retainer.

2. The apparatus of claim 1, wherein:

said second retainer is securable to said support bracket, and

said adjustment member is securable to said support bracket.

3. The apparatus of claim 2, further including a stud having an externally threaded portion, wherein:

said second retainer includes an internally threaded portion,

said stud extends through said opening of said adjustment member, and

said externally threaded portion of said stud meshingly engages said internally threaded portion of said second retainer.

4. The apparatus of claim 3, further comprising:

a wear strip interposed between said first retainer and the respective one of said blade rail.

5. The apparatus of claim 3, wherein:

said support bracket includes an aperture defined therein, and

said stud extends through said aperture defined in said support bracket.

6. The apparatus of claim 1, wherein said first retainer and said second retainer cooperate to adjustably support said grader blade.

7. The apparatus of claim 1, wherein:

said support bracket has an upper portion and a lower portion,

said upper portion is positioned relative to said lower portion such that said upper portion and said lower portion define an obtuse angle therebetween, and

said first retainer is secured to said upper portion and said second retainer is secured to said lower portion.

8. The apparatus of claim 1, further comprising:

a first L-shaped wear strip interposed between said first retainer and said grader blade; and

a second L-shaped wear strip interposed between said second retainer and said grader blade.

9. The apparatus of claim 1, further comprising a movement actuator for rotating said adjustment member.

10. The apparatus of claim 9, wherein said movement actuator includes:

a shaft coupled to said adjustment member; and

a turnbuckle which meshingly engages said shaft.

11. The apparatus of claim 1, wherein a gap is defined between said support bracket and said grader blade, further comprising:

a rock guard positioned relative to said support bracket so as to cover said gap.

12. An apparatus for retaining a grader blade having a blade rail, comprising:

a support bracket;

a first upper retainer secured to said support bracket;

a second upper retainer secured to said support bracket;

a first lower retainer secured to said support bracket, said first lower retainer being movable relative to said first upper retainer, and said first upper retainer and said first lower retainer cooperate so as to secure said blade rail in fixed relation to said support bracket;

a second lower retainer secured to said support bracket, said second lower retainer being movable relative to said second upper retainer, and said second upper retainer and said second lower retainer cooperate so as to secure said blade rail in fixed relation to said support bracket;

a first adjustment member which contacts said first lower retainer, wherein (1) said first adjustment member has an opening extending therethough, (2) said opening is eccentrically located relative to a first center C1 of said first adjustment member, (3) rotation of said first adjustment member in a first direction causes said first lower retainer to move towards said first upper retainer, and (4) rotation of said first adjustment member in a second direction causes said first lower retainer to move away from said first upper retainer; and

a second adjustment member which contacts said second lower retainer, wherein (1) said second adjustment member has an opening extending therethough, (2) said opening is eccentrically located relative to a second center C2 of said second adjustment member, (3) rotation of said second adjustment member in a first direction causes said second lower retainer to move towards said second upper retainer, and (4) rotation of said second adjustment member in a second direction causes said second lower retainer to move away from said second upper retainer.

13. The apparatus of claim 12, further comprising:

a first wear strip interposed between said first upper retainer and said blade rail; and

a second wear strip interposed between said second upper retainer and said blade rail.

14. The apparatus of claim 12, wherein:

said support bracket has an upper portion and a lower portion,

said upper portion is positioned relative to said lower portion such that said upper portion and said lower portion define an obtuse angle therebetween,

said first upper retainer and said second upper retainer are secured to said upper portion, and

said first lower retainer and said second lower retainer are secured to said lower portion.

15. The apparatus of claim 14, further comprising:

a first L-shaped wear strip interposed between said first upper retainer and said grader blade; and

a second L-shaped wear strip interposed between said first lower retainer and said grader blade.

16. The apparatus of claim 12, further comprising a movement actuator for rotating said first adjustment member and said second adjustment member.

17. The apparatus of claim 16, wherein said movement actuator includes:

a first shaft coupled to said first adjustment member,

a second shaft coupled to said second adjustment member, and

a turnbuckle which meshingly engages said first shaft and said second shaft.

18. The apparatus of claim 17, wherein rotation of said turnbuckle causes (1) rotation of said first adjustment member, and (2) rotation of said second adjustment member.

19. A method of adjusting a grader blade relative to a support bracket, with (1) the support bracket having an upper retainer and a lower retainer secured thereto, (2) the support bracket having an aperture defined therein, comprising the steps of:

positioning said lower retainer at a first position relative to said upper retainer with an adjustment member, wherein (1) said adjustment member is positioned within said aperture defined in said support bracket, (2) said adjustment member has an opening extending therethrough, and (3) said opening is eccentrically located relative to a center C of said adjustment member;

supporting the grader blade with said upper retainer and said lower retainer;

performing a grading operation with said grader blade after the positioning step; and

rotating said adjustment member after the performing step so that said lower retainer is moved to a second position relative to said upper retainer.