VALVE GUIDE INSERT WITH FRICTIONAL PRE-BROACH RETENTION FEATURE
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United States of America Patent
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Issued Date -
Dec 11, 2014
app pub date -
May 15, 2014
filing date -
Jun 6, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A valve guide insert for lining and relining a valve guide bore in an internal combustion engine includes a one-piece, thin-walled, cylindrically-shaped metallic tube made from reformable bearing material having first and second ends and an intermediate portion. An inwardly tapered portion is disposed at the first end, wherein an end diameter of the inwardly tapered portion is less than an outer diameter of a valve guide bore, and wherein the outer diameter of the intermediate section is greater than an inner diameter of a valve guide bore. A longitudinal slit is included having a stepped portion along a length of the longitudinal slit. An interference portion is disposed proximate the second end, wherein the interference portion is configured to substantially secure the valve guide insert within a valve guide bore.
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