Transmission

Claim 2

For use with a vehicular engine, an accessory drive transmission comprising a belt-driven input pulley and an output shaft; a planetary drive unit including an output ring member, an input sun member, a plurality of planets operatively connected between said inner sun and outer ring members, and a carrier member for driving said planets; connector means surrounding said output shaft for connecting said carrier member to said input pulley for rotation therewith; a source of vacuum reflective of engine speed; a housing; a diaphragm serving as a movable wall to form first and second chambers in said housing; a line for communicating a vacuum signal from said source to said first chamber; a stem mounted on said diaphragm and extending axially through said second chamber and the wall of said housing; a reaction friction member secured adjacent one face of said outer ring member; a second friction member movably mounted adjacent the other face of said outer ring member; a lever member pivotally mounted adjacent said second friction member; a spring interconnecting said lever member and said stem for permitting said diaphragm to move through said first chamber to the wall of said housing while said second friction member moves only a short distance to frictionally engage said outer ring member; said second friction member being urged into contact with said other face of said outer ring member, thereby frictionally confining said outer ring member between said second friction member and said reaction friction member in response to pivotal movement by said lever member caused by axial movement of said diaphragm responsive to a vacuum signal indicative of engine speed below a predetermined value; and a one-way clutch mounted intermediate said carrier member and said output shaft for driving said output shaft directly upon disengagement of said second friction member from said other face of said outer ring member in response to vacuum signals indicative of engine speeds above said predetermined value.

Claim 3

For use with a vehicular engine, an accessory drive transmission comprising a belt-driven input pulley and an output shaft; a planetary traction-drive unit including an outer ring member, an inner sun member, a plurality of ball planets frictionally contacting said inner sun and outer ring members, and a carrier member for driving said ball planets; connector means surrounding said output shaft for connecting said carrier member to said input pulley for Rotation therewith; a source of vacuum reflective of engine speed; a housing; a diaphragm serving as a movable wall to form first and second chambers in said housing; a line for communicating a vacuum signal from said source to said first chamber; a stem mounted on said diaphragm and extending axially through said second chamber and the wall of said housing; a reaction friction member secured adjacent one face of said outer ring member; a second friction member movably mounted adjacent the other face of said outer ring member; a lever member pivotally mounted adjacent said second friction member; a spring interconnecting said lever member and said stem for permitting said diaphragm to move through said first chamber to the wall of said housing while said second friction member moves only a short distance to frictionally engage said outer ring member; said second friction member being urged into contact with said other face of said outer ring member, thereby frictionally confining said outer ring member between said second member and said reaction friction member in response to pivotal movement by said lever member caused by axial movement of said diaphragm responsive to a vacuum signal indicative of engine speed below a predetermined value; and a one-way clutch mounted intermediate said carrier member and said output shaft for driving said output shaft directly upon disengagement of said second friction member from said other face of said outer ring member in response to vacuum signals indicative of engine speeds above said predetermined value.

Claim 4

For use with a vehicular engine, an accessory drive transmission comprising a belt-driven input pulley and an output shaft; a planetary traction-drive unit including an outer ring member, an inner sun member, a plurality of ball planets frictionally contacting said inner sun and outer ring members, and a carrier member for driving said ball planets; connector means surrounding said output shaft for connecting said carrier member to said input pulley for Rotation therewith; a source of vacuum reflective of engine speed; a housing; a diaphragm serving as a movable wall to form first and second chambers in said housing; a line for communicating a vacuum signal from said source to said first chamber; a stem mounted on said diaphragm and extending axially through said second chamber and the wall of said housing; a reaction friction member secured adjacent one face of said outer ring member; a second friction member movably mounted adjacent the other face of said outer ring member; a lever member pivotally mounted adjacent said second friction member; a spring interconnecting said lever member and said stem for permitting said diaphragm to move through said first chamber to the wall of said housing while said second friction member moves only a short distance to frictionally engage said outer ring member; said second friction member being urged into contact with said other face of said outer ring member, thereby frictionally confining said outer ring member between said second member and said reaction friction member in response to pivotal movement by said lever member caused by axial movement of said diaphragm responsive to a vacuum signal indicative of engine speed below a predetermined value; and a one-way clutch mounted intermediate said carrier member and said output shaft for driving said output shaft directly upon disengagement of said second friction member from said other face of said outer ring member in response to vacuum signals indicative of engine speeds above said predetermined value.

Claim 5

For use with a vehicular engine, an accessory drive transmission comprising a belt-driven input pulley and an output shaft; a planetary gear unit including an outer ring gear, an inner sun gear, a plurality of planet gears intermeshed between said inner sun and outer ring gears, and a carrier member for driving said planet gears; connector means surrounding said output shaft for connecting said carrier member to said input pulley for rotation therewith; a source of vacuum reflective of engine speed; a housing; a diaphragm serving as a movable wall to form first and second chambers in said housing; a line for communicating a vacuum signal from said source to said first chamber; a stem mounted on said diaphragm and extending axially through said second chamber and the wall of said housing; a reaction friction member secured adjacent one face of said outer ring gear; a second friction member movably mounted adjacent the other face of said outer ring gear; a lever member pivotally mounted adjacent said second friction member; a spring interconnecting said lever member and said stem for permitting said diaphragm to move through said first chamber to the wall of said housing while said second friction member moves only a short distance to frictionally engage said outer ring member; said second friction member being urged into contact with said other face of said outer ring gear, thereby frictionally confining said outer ring gear between said second friction member and said reaction friction member in response to pivotal movement by said lever member caused by axial movement of said diaphragm responsive to a vacuum signal indicative of engine speed below a predetermined value; and a one-way clutch mounted intermediate said carrier member and said output shaft for driving said output shaft directly upon disengagement of said second friction member from said other face of said outer ring gear in response to vacuum signals indicative of engine speeds above said predetermined value.

Claim 6

For use with a vehicular engine, an accessory drive transmission comprising a belt-driven input pulley and an output shaft; a planetary gear unit including an outer ring gear, an inner sun gear, a plurality of planet gears intermeshed between said inner sun and outer ring gears, and a carrier member for driving said planet gears; connector means surrounding said output shaft for connecting said carrier member to said input pulley for rotation therewith; a source of vacuum reflective of engine speed; a housing; a diaphragm serving as a movable wall to form first and second chambers in said housing; a line for communicating a vacuum signal from said source to said first chamber; a stem mounted on said diaphragm and extending axially through said second chamber and the wall of said housing; a reaction friction member secured adjacent one face of said outer ring gear; a second friction member movably mounted adjacent the other face of said outer ring gear; a lever member pivotally mounted adjacent said second friction member; a spring interconnecting said lever member and said stem for permitting said diaphragm to move through said first chamber to the wall of said housing while said second friction member moves only a short distance to frictionally engage said outer ring member; said second friction member being urged into contact with said other face of said outer ring gear, thereby frictionally confining said outer ring gear between said second friction member and said reaction friction member in response to pivotal movement by said lever member caused by axial movement of said diaphragm responsive to a vacuum signal indicative of engine speed below a predetermined value; and a one-way clutch mounted intermediate said carrier member and said output shaft for driving said output shaft directly upon disengagement of said second friction member from said other face of said outer ring gear in response to vacuum signals indicative of engine speeds above said predetermined value.