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GB2121908A Expired / Lapsed GB ⏱️ 0.0 years remaining

A camshaft

Assignee: Nippon Piston Ring Co Ltd
•
Filing: 1983-06-16
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Granted: —
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Expires: 2003-06-16
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Abstract

Abstract A composite camshaft for use in an internal combustion engine comprises a tubular steel shaft 1 and a plurality of cams 31-38 mounted on the shaft. The shaft has a plurality of circumferentially spaced longitudinally extending grooves or projections 11-14 which in number are equal to or less than the engine cylinders. Every cam is identically shaped to have at least one projection or groove 30 in its inner periphery for co- operation with one of the grooves or projections of the shaft. The projection or groove 30 is angularly spaced by a preselected angle ??? from a symmetrical centre-line of the cam, passing through the cam nose, the preselected angle being one half of an angle ??? defined between the case noses of a pair of inlet and exhaust cams. <IMAGE>

Inventors

  • 👤 Shigeru Urano
  • 👤 Michiyoshi Matsuzaki
  • 👤 Shunsuke Takeguchi

Bibliographic Details

Application Number —
Jurisdiction GB
Data Source google_patents
Last Synchronized 2026-11-09 07:29
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/02; F16H53/025; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; B; B22; B22F; B22F2998/00

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 105 words
A camshaft for use in an internal combustion engine with a plurality of cylinders, comprising a tubular steel shaft and a plurality of cams mounted on the shaft, the shaft having a plurality of grooves or projections for co-operation with at least one groove or projection provided in the inner periphery of each cam, the groove or projection in the inner periphery of the cam being spaced by a preselected angle from a symmetrical line of the cam passing through a cam nose, said preselected angle being one-half of an angle defined between the respective cam noses of a pair of inlet and exhaust cams.
Claim 2
Dependent Claim 105 words
A camshaft for use in an internal combustion engine with a plurality of cylinders, comprising a tubular steel shaft and a plurality of cams mounted on the shaft, the shaft having a plurality of grooves or projections for co-operation with at least one groove or projection provided in the inner periphery of each cam, the groove or projection in the inner periphery of the cam being spaced by a preselected angle from a symmetrical line of the cam passing through a cam nose, said preselected angle being one-half of an angle defined between the respective cam noses of a pair of inlet and exhaust cams.
Claim 3
Dependent Claim 38 words
A camshaft as claimed in claim 1, wherein the number of said grooves or projections in said shaft is at most equal to the number of cylinders of the engine in which the camshaft is designed to operate.
Claim 4
Dependent Claim 17 words
A camshaft as claimed in claim 1 or claim 2, wherein each cam is of sintered alloy.
Claim 5
Dependent Claim 34 words
A camshaft as claimed in any one of claims 1-3, wherein the groove or projection in the inner periphery of said cam is spaced from the nose of the cam by an acute angie.
Claim 6
Dependent Claim 26 words
A camshaft as claimed in any one of claims 1-4, wherein the shaft is provided with grooves and each is provided with at least one projection.
Claim 7
Dependent Claim 27 words
A camshaft as claimed in any one of claims 4, wherein the shaft is provided with projections and each cam is provided with at least one groove.
Claim 8
Dependent Claim 26 words
A camshaft for use in an internal combustion engine, substantially as hereinbefore described with reference to any one of the embodiments shown in the accompanying drawings.
Claim 9
Dependent Claim 26 words
A camshaft for use in an internal combustion engine, substantially as hereinbefore described with reference to any one of the embodiments shown in the accompanying drawings.

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