S cam bushing assembly
DC
First Claim
Patent Images
1. A support assembly for supporting a S cam, the S cam being an intermediary device between a brake actuator and a set of wheel brakes and is generally an elongate metal shank having an S-head at a first end of the shank and a set of splines at the second end of the shank, the S-head having at least one arm for engaging a respective brake shoe, whereby rotation of the S cam in a first direction causes the at least one arm of the S-head to act on the brake shoe to frictionally engage the respective brake shoe with a brake drum, the support assembly comprising:
- a single elongate bushing rotationally supporting and substantially coextensive along the length of the S cam shank, the bushing extending from proximate the S-head to proximate the splines; and
a bushing holder, wherein the single elongate bushing is substantially enclosed within the bushing holder, wherein the bushing is substantially sealed within the bushing holder by a first and second seal member disposed at first and second ends of the bushing respectively, each of the seal members forming a sealing interface with the bushing holder and the S cam shank.
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Abstract
A support assembly for supporting a S cam, the S cam being an intermediary device between a brake actuator and a set of wheel brakes and is generally an elongate metal rod shank having an S-head at one end and a set of splines at the other end, the S-head having at least one arm for engaging a respective brake shoe, whereby rotation of the S cam in a first direction causes the at least one arm of the S-head act on the brake shoe to frictionally engage the brake shoe with a brake drum, the brake drum being affixed to a wheel, includes single bushing rotationally supporting the S cam. A method of supporting the S cam is further included.
16 Citations
4 Claims
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1. A support assembly for supporting a S cam, the S cam being an intermediary device between a brake actuator and a set of wheel brakes and is generally an elongate metal shank having an S-head at a first end of the shank and a set of splines at the second end of the shank, the S-head having at least one arm for engaging a respective brake shoe, whereby rotation of the S cam in a first direction causes the at least one arm of the S-head to act on the brake shoe to frictionally engage the respective brake shoe with a brake drum, the support assembly comprising:
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a single elongate bushing rotationally supporting and substantially coextensive along the length of the S cam shank, the bushing extending from proximate the S-head to proximate the splines; and a bushing holder, wherein the single elongate bushing is substantially enclosed within the bushing holder, wherein the bushing is substantially sealed within the bushing holder by a first and second seal member disposed at first and second ends of the bushing respectively, each of the seal members forming a sealing interface with the bushing holder and the S cam shank.
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2. A support assembly for supporting a S cam, the S cam being an intermediary device between a brake actuator and a set of wheel brakes and is generally an elongate metal shank having an S-head at a first end of the shank and a set of splines at the second end of the shank, the S-head having at least one arm for engaging a respective brake shoe, whereby rotation of the S cam in a first direction causes the at least one arm of the S-head to act on the brake shoe to frictionally engage the respective brake shoe with a brake drum, the support assembly comprising:
a single elongate bushing rotationally supporting and substantially coextensive along the length of the S cam shank, the bushing extending from proximate the S-head to proximate the splines, an S cam shank outside margin being machined and having a certain outside diameter, the S cam shank outside margin spaced apart from an inside margin of the bushing; and
a bushing holder, wherein the single elongate bushing is substantially enclosed within the bushing holder.
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3. A support assembly for supporting a S cam, the S cam having a generally elongate metal rod shank having an S-head at one end of the shank and a set of splines at the other end of the shank, the support assembly comprising:
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a single elongate bushing rotationally supporting and substantially coextensive along the length of the S cam shank, the bushing extending from proximate the S-head to proximate the splines; and a bushing holder, the bushing being substantially enclosed within the bushing holder, wherein the bushing is substantially sealed within the bushing holder by first and second seal members disposed at first and second ends of the bushing respectively, each of the seal members forming a sealing interface with the bushing holder and the s cam shank.
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4. A method of supporting a S cam, the S cam being an intermediary device between a brake actuator and a set of wheel brakes and having a generally elongate metal shank having an S-head at one end and a set of splines at the other end, the S-head having at least one arm for engaging a respective brake shoe, whereby rotation of the S cam in a first direction causes the at least one arm of the S-head to act on the respective brake shoe to frictionally engage the brake shoe with a brake drum, the method comprising:
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rotationally supporting the S cam shank in a single elongate bushing, such that the bushing is substantially coextensive with the S cam shank and extends from proximate the S-head to proximate the splines; providing a bushing holder and substantially enclosing the bushing within the bushing holder; and substantially sealing the bushing within a bushing holder by first and second seal members disposed at first and second ends of the bushing respectively.
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Specification
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Litigation Data
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Current AssigneeW.C. Industries, Inc.
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Original AssigneeW.C. Industries, Inc.
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InventorsGibson, Jr., William J.
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Primary Examiner(s)Burch, Melody M
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Application NumberUS10/673,641Publication NumberTime in Patent Office2,587 DaysField of Search188/329, 188/330, 188/73.31, 188/205.R, 188/206.R, 403/365, 403/367US Class Current188/330CPC Class CodesF16C 2361/45 Brakes in general B60T, F16...F16C 33/04 Brasses; Bushes; LiningsF16C 33/102 with grease as lubricantF16C 33/1065 Grooves on a bearing surfac...F16D 2125/30 acting on two or more cam f...Y10T 403/7047 Radially interposed shim or...
