Clutch having a variable viscosity fluid

A clutch (A,B) includes a cam ( 20,70 ) and a rotor ( 22,74 ), both of which revolve around a common axis (X). The cam has a camming surface ( 30,72 ) provided with lobes ( 32 ), whereas the rotor carries pistons ( 26,80 ) which bear against the camming surface of the cam. The pistons project from p...

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1. Verfasser:	GRADU MIRCEA
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS 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	GRADU MIRCEA
description	A clutch (A,B) includes a cam ( 20,70 ) and a rotor ( 22,74 ), both of which revolve around a common axis (X). The cam has a camming surface ( 30,72 ) provided with lobes ( 32 ), whereas the rotor carries pistons ( 26,80 ) which bear against the camming surface of the cam. The pistons project from piston cavities ( 40,42; 76 ) in the rotor and those cavities communicate through a connecting cavity ( 44,78 ), to thereby form a fluid chamber ( 56,82 ) of constant volume which contains a magneto-rheological fluid ( 28,84 ). An electrical coil controls the viscosity of the rheological fluid. When the viscosity is low, the pistons will move inwardly and outwardly on the rotor as the camming surface passes over them and no torque will transfer between the cam and rotor. However, when the fluid is viscous, the fluid will impede displacement of the pistons in the piston cavities, and the pistons will grip the camming surface sufficiently to enable torque to transfer between the cam and rotor.
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The cam has a camming surface ( 30,72 ) provided with lobes ( 32 ), whereas the rotor carries pistons ( 26,80 ) which bear against the camming surface of the cam. The pistons project from piston cavities ( 40,42; 76 ) in the rotor and those cavities communicate through a connecting cavity ( 44,78 ), to thereby form a fluid chamber ( 56,82 ) of constant volume which contains a magneto-rheological fluid ( 28,84 ). An electrical coil controls the viscosity of the rheological fluid. When the viscosity is low, the pistons will move inwardly and outwardly on the rotor as the camming surface passes over them and no torque will transfer between the cam and rotor. However, when the fluid is viscous, the fluid will impede displacement of the pistons in the piston cavities, and the pistons will grip the camming surface sufficiently to enable torque to transfer between the cam and rotor.</description><language>eng</language><subject>BLASTING ; BRAKES ; CLUTCHES ; COUPLINGS FOR TRANSMITTING ROTATION ; ENGINEERING ELEMENTS AND UNITS ; 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&date=20070717&DB=EPODOC&CC=US&NR=7243768B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20070717&DB=EPODOC&CC=US&NR=7243768B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GRADU MIRCEA</creatorcontrib><title>Clutch having a variable viscosity fluid</title><description>A clutch (A,B) includes a cam ( 20,70 ) and a rotor ( 22,74 ), both of which revolve around a common axis (X). The cam has a camming surface ( 30,72 ) provided with lobes ( 32 ), whereas the rotor carries pistons ( 26,80 ) which bear against the camming surface of the cam. The pistons project from piston cavities ( 40,42; 76 ) in the rotor and those cavities communicate through a connecting cavity ( 44,78 ), to thereby form a fluid chamber ( 56,82 ) of constant volume which contains a magneto-rheological fluid ( 28,84 ). An electrical coil controls the viscosity of the rheological fluid. When the viscosity is low, the pistons will move inwardly and outwardly on the rotor as the camming surface passes over them and no torque will transfer between the cam and rotor. However, when the fluid is viscous, the fluid will impede displacement of the pistons in the piston cavities, and the pistons will grip the camming surface sufficiently to enable torque to transfer between the cam and rotor.</description><subject>BLASTING</subject><subject>BRAKES</subject><subject>CLUTCHES</subject><subject>COUPLINGS FOR TRANSMITTING ROTATION</subject><subject>ENGINEERING ELEMENTS AND UNITS</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>eNrjZNBwziktSc5QyEgsy8xLV0hUKEssykxMyklVKMssTs4vziypVEjLKc1M4WFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8aHB5kYmxuZmFk5GxkQoAQB9pCgT</recordid><startdate>20070717</startdate><enddate>20070717</enddate><creator>GRADU MIRCEA</creator><scope>EVB</scope></search><sort><creationdate>20070717</creationdate><title>Clutch having a variable viscosity fluid</title><author>GRADU MIRCEA</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US7243768B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2007</creationdate><topic>BLASTING</topic><topic>BRAKES</topic><topic>CLUTCHES</topic><topic>COUPLINGS FOR TRANSMITTING ROTATION</topic><topic>ENGINEERING ELEMENTS AND UNITS</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>GRADU MIRCEA</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GRADU MIRCEA</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Clutch having a variable viscosity fluid</title><date>2007-07-17</date><risdate>2007</risdate><abstract>A clutch (A,B) includes a cam ( 20,70 ) and a rotor ( 22,74 ), both of which revolve around a common axis (X). The cam has a camming surface ( 30,72 ) provided with lobes ( 32 ), whereas the rotor carries pistons ( 26,80 ) which bear against the camming surface of the cam. The pistons project from piston cavities ( 40,42; 76 ) in the rotor and those cavities communicate through a connecting cavity ( 44,78 ), to thereby form a fluid chamber ( 56,82 ) of constant volume which contains a magneto-rheological fluid ( 28,84 ). An electrical coil controls the viscosity of the rheological fluid. When the viscosity is low, the pistons will move inwardly and outwardly on the rotor as the camming surface passes over them and no torque will transfer between the cam and rotor. However, when the fluid is viscous, the fluid will impede displacement of the pistons in the piston cavities, and the pistons will grip the camming surface sufficiently to enable torque to transfer between the cam and rotor.</abstract><oa>free_for_read</oa></addata></record>
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subjects	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING THERMAL INSULATION IN GENERAL WEAPONS
title	Clutch having a variable viscosity fluid
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