Continuously variable ratio transmission unit

Continuously variable ratio transmission unit

There is disclosed a continuously variable ratio transmission unit of rolling traction type, comprising a pair of races ( 10,12 ) between which torque is transmitted by at least one roller ( 26 ), the roller being movable to provide variation in the transmission ratio and being subject to an adjusta...

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Hauptverfasser: WOODS ADRIAN, DEFREITAS ANDREW D
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
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creator WOODS ADRIAN
DEFREITAS ANDREW D
description There is disclosed a continuously variable ratio transmission unit of rolling traction type, comprising a pair of races ( 10,12 ) between which torque is transmitted by at least one roller ( 26 ), the roller being movable to provide variation in the transmission ratio and being subject to an adjustable roller reaction force by a roller actuator ( 28 ), a traction loading actuator ( 35 ) arranged to urge the rollers and discs into engagement with each other with a force which is varied in sympathy with the roller reaction force during normal variator operation, and a pre-loading arrangement ( 80 ) which is arranged to urge the rollers and discs into engagement with each other at least during a cold start wherein the pre-loading arrangement is adapted to apply a pre-loading force is reduced with increasing operating temperature.
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ENGINEERING ELEMENTS AND UNITS ; GEARING ; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS ; HEATING ; LIGHTING ; MECHANICAL ENGINEERING ; THERMAL INSULATION IN GENERAL ; WEAPONS</subject><creationdate>2007</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20070329&amp;DB=EPODOC&amp;CC=US&amp;NR=2007072736A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,777,882,25545,76296</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20070329&amp;DB=EPODOC&amp;CC=US&amp;NR=2007072736A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>WOODS ADRIAN</creatorcontrib><creatorcontrib>DEFREITAS ANDREW D</creatorcontrib><title>Continuously variable ratio transmission unit</title><description>There is disclosed a continuously variable ratio transmission unit of rolling traction type, comprising a pair of races ( 10,12 ) between which torque is transmitted by at least one roller ( 26 ), the roller being movable to provide variation in the transmission ratio and being subject to an adjustable roller reaction force by a roller actuator ( 28 ), a traction loading actuator ( 35 ) arranged to urge the rollers and discs into engagement with each other with a force which is varied in sympathy with the roller reaction force during normal variator operation, and a pre-loading arrangement ( 80 ) which is arranged to urge the rollers and discs into engagement with each other at least during a cold start wherein the pre-loading arrangement is adapted to apply a pre-loading force is reduced with increasing operating temperature.</description><subject>BLASTING</subject><subject>ENGINEERING ELEMENTS AND UNITS</subject><subject>GEARING</subject><subject>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>THERMAL INSULATION IN GENERAL</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2007</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNB1zs8rycwrzS8tzqlUKEssykxMyklVKEosycxXKClKzCvOzSwuzszPUyjNyyzhYWBNS8wpTuWF0twMym6uIc4euqkF-fGpxQWJyal5qSXxocFGBgbmBuZG5sZmjobGxKkCANNhK_c</recordid><startdate>20070329</startdate><enddate>20070329</enddate><creator>WOODS ADRIAN</creator><creator>DEFREITAS ANDREW D</creator><scope>EVB</scope></search><sort><creationdate>20070329</creationdate><title>Continuously variable ratio transmission unit</title><author>WOODS ADRIAN ; DEFREITAS ANDREW D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2007072736A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2007</creationdate><topic>BLASTING</topic><topic>ENGINEERING ELEMENTS AND UNITS</topic><topic>GEARING</topic><topic>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>THERMAL INSULATION IN GENERAL</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>WOODS ADRIAN</creatorcontrib><creatorcontrib>DEFREITAS ANDREW D</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>WOODS ADRIAN</au><au>DEFREITAS ANDREW D</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Continuously variable ratio transmission unit</title><date>2007-03-29</date><risdate>2007</risdate><abstract>There is disclosed a continuously variable ratio transmission unit of rolling traction type, comprising a pair of races ( 10,12 ) between which torque is transmitted by at least one roller ( 26 ), the roller being movable to provide variation in the transmission ratio and being subject to an adjustable roller reaction force by a roller actuator ( 28 ), a traction loading actuator ( 35 ) arranged to urge the rollers and discs into engagement with each other with a force which is varied in sympathy with the roller reaction force during normal variator operation, and a pre-loading arrangement ( 80 ) which is arranged to urge the rollers and discs into engagement with each other at least during a cold start wherein the pre-loading arrangement is adapted to apply a pre-loading force is reduced with increasing operating temperature.</abstract><oa>free_for_read</oa></addata></record>
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subjects BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
title Continuously variable ratio transmission unit
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