Spring attachment tool for air brake shoes

• US 8,931,150 B2
• Filed: 02/09/2012
• Issued: 01/13/2015
• Est. Priority Date: 02/14/2011
• Status: Active Grant

• Current Assignee: Ole Luangphon
• Original Assignee: Ole Luangphon
• Inventors: Luangphon, Ole
• Primary Examiner(s): Wilson, Lee D
• Application Number:
  US13/369,544
• Publication Number:
  US 20120204392A1
• Time in Patent Office: 1,069 Days
• Field of Search: 292/55, 292/78, 292/70, 292/44, 269/3, 269/6, 269/95
• US Class Current: 29/225
• CPC Class Codes: B25B 27/306 by tensioning coil springs
• CPC Class Codes: Y10T 29/53613 Spring applier or remover
• CPC Class Codes: Y10T 29/53943 Hand gripper for direct push or pull

Abstract

A tool for attaching and disengaging a return spring in a truck brake assembly comprises a handle, a shaft, and an arm with a hook and a smaller reverse hook. The hook provides leverage around the spring retainer and the reverse hook engages the spring end to move it into place.

Claims

1. A tool for attaching a return spring to a brake assembly, comprising a handle, a shaft extending from the handle, an arm extending at approximately a right angle from a distal end of the shaft, a first hook extending from the arm in a plane perpendicular to the shaft, and a short hook in a reverse direction from the first hook, wherein the orientation of the short hook is rotated between about thirty degrees and about sixty degrees in a direction away from the handle.

2. The tool of claim 1 wherein the orientation of the short hook is rotated about forty-five degrees in a direction away from the handle.

6. The tool of claim 1, comprising a single ⅜

inch steel rod.

3. A tool for attaching a return spring to a brake assembly, comprising a handle, a shaft extending from the handle, an arm extending at approximately a right angle from a distal end of the shaft, a first hook extending from the arm in a plane perpendicular to the shaft, and a short hook in a reverse direction from the first hook, wherein the shaft is about 6 inches long, the first arm is about 2 ½

inches long, leading to the first hook having about a ½

inch radius of curvature, and the short hook has about a ¼

inch radius of curvature.

4. The tool of claim 3, wherein the orientation of the short hook is rotated slightly in a direction away from the handle.

5. The tool of claim 3, wherein the orientation of the short hook is rotated between about five degrees and about ninety degrees in a direction away from the handle.

7. The tool of claim 3, comprising a single ⅜

inch steel rod.

8. The tool of claim 4, comprising a single ⅜

inch steel rod.

9. A tool for attaching a return spring to a brake assembly, comprising a ⅜

inch steel rod comprising a handle, a shaft extending about 6 inches from the handle, an arm extending about 2 ½

inches at approximately a right angle from a distal end of the shaft, a first hook having about a ½

inch radius of curvature extending from the arm in a plane perpendicular to the shaft, and a short hook in a reverse direction from the first hook, having about a ¼

inch radius of curvature and an orientation rotated about 45 degrees in a direction away from the handle.