Spring Removal Tool for Air Brake Shoes
OwnerOle Luangphoninventor
Life of this patent
Estimating the term…
Abstract
A tool for attaching and disengaging a retainer spring in a truck brake assembly comprises a handle, a supporting curved member, a stabilizing tab and a fulcrum rod that enables a mechanic to engage and move into place the retainer spring using a long bar. An optional lever bar with a partially closed hook may be used to more effectively control the retainer spring during the operation.
Claims8
A tool for attaching a retaining spring to a brake assembly, comprising a handle portion, a curved main body with a curvature matching an external radius of the brake assembly, a supporting extension connecting the handle to the curved body, a fulcrum crossbar attached to the handle such that in operation it will be positioned near the retaining spring, a curved bend at the distal end of the main body forming a stabilizing arm, and a securing tab extending from the stabilizing arm dimensioned to fit into an aperture in a groove on the brake assembly.
A tool for attaching a retaining spring to a brake assembly, comprising a handle portion, a curved main body with a curvature matching an external radius of the brake assembly, a supporting extension connecting the handle to the curved body, a fulcrum crossbar attached to the handle such that in operation it will be positioned near the retaining spring, and a means for removably securing the distal end of the tool to the brake assembly.
A method for stretching a brake assembly retaining spring to release or attach the spring, comprising the steps of
- providing a tool comprising a handle portion, a curved main body with a curvature matching an external radius of the brake assembly, a supporting extension connecting the handle to the curved body, a fulcrum crossbar attached to the handle such that in operation it will be positioned near the retaining spring, a curved bend at the distal end of the main body forming a stabilizing arm, and a securing tab extending from the stabilizing arm dimensioned to fit into an aperture in a groove on the brake assembly;
- inserting the securing tab into the aperture in the groove;
- rotating the tool downward so that it rests on the brake assembly;
- attaching the spring to a first attachment aperture in the brake assembly and positioning its free end near a second attachment aperture;
- releasably engaging the free end of spring with the hooked end of a lever bar having a handle end and a hooked end;
- resting the lever bar on the fulcrum crossbar and pushing downward on the handle end to force upward the free end of the spring, thereby stretching the spring.
Dependencies are inferred from the claim text.