Rotary valve for hydraulic power steering with reduced noise and linear boost characteristic

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United States of America Patent

PATENT NO 5458153
SERIAL NO

08256350

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A rotary valve having chamfers (26,39) at the groove edges (31) of its input shaft (10) which, in conjunction with axially extending troughs (44), form metering edge contours. The chamfers (26,39) and troughs (44) at the edges (31) of the grooves (18a,18b) interacting with sleeve slots (19) to reduce valve hiss and linearise the boost characteristic of the valve.

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Patent Owner(s)

Patent OwnerAddress
A E BISHOP & ASSOCIATES PTY LIMITED10 WATERLOO ROAD NORTH RYDE NSW 2113

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Roeske, Klaus J Lugarno, AU 10 65

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