US Patent 7721691 Variable valve mechanism for internal combustion engine
Patent 7721691 was granted and assigned to Toyota on May, 2010 by the United States Patent and Trademark Office.
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Patent abstract
A worm gear is connected to an actuator and a worm wheel is connected to a control shaft. The worm wheel has teeth formed only on a predetermined angular range thereof. The above-referenced angular range includes a required rotational range of the control shaft. The worm wheel is formed to be brought out of mesh with the worm gear outside the predetermined angular range.
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Patent Inventor Names
Manabu Tateno0
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US Patent 07721691 Variable valve mechanism for internal combustion engine US Patent 7721691 Variable valve mechanism for internal combustion engine
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Patent Number
077216910
Patent Number
77216910
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Official Website
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Current Assignee
Patent Jurisdiction
Patent Number
077216910
Date of Patent
May 25, 2010
0Patent Application Number
119895670
Date Filed
October 31, 2006
0Official Website
Patent Primary Examiner
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US Patent 07721691 Variable valve mechanism for internal combustion engine
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07721691
Date of patent
May 25, 2010
Patent application number
11989567
Date Filed
October 31, 2006
Patent primary examiner
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