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US 2009/0078110 A1Published application
Pneumatic drive system
OwnerDieter Waldmann, Jan-Peter Bender +1inventors
InventorsDieter Waldmann, Jan-Peter Bender, Jose Arana
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OwnerDieter Waldmann, Jan-Peter Bender +1inventors
InventorsDieter Waldmann, Jan-Peter Bender, Jose Arana
Estimating the term…
It is a question of a pneumatic drive system comprising at least one pneumatic drive (2) possessing a drive housing (4) and an output drive unit (6) able to be shifted in relation to it by the action of compressed air, the output drive unit (6) including an output drive piston (8), which in the drive housing (4) separates two working chambers (12 and 13) from one another, one or both of such chambers being connected with a pneumatic control line (17 and 18), such line having control valve means (22 and 23) able to be switched over between an air economy position and an open position (24) making available a flow cross section which is larger than that of the air economy position, such control valve means being provided with actuating means (32) able to be activated in a manner dependent on the position of the output drive unit (6), such actuating means being able to cause a switching over of the control valve means (22 and 23) into the air economy position, when the output drive unit (6), owing to the compressed air flowing through the control valve means (22 and 23) into the pneumatic drive (2), has reached an end of stroke position or a position just short thereof. The air economy setting has the particular feature that it is in the form of a choking setting (25) opening up a flow cross section which is smaller than in the open position (24).
A pneumatic drive system comprising at least one pneumatic drive possessing a drive housing and an output drive unit able to be shifted in relation to the drive housing by the action of compressed air, the output drive unit including an output drive piston, which in the drive housing separates two working chambers from one another, one or both of such working chambers being connected with a pneumatic control line, such control line having control valve means able to be switched over between an air economy position and an open position making available a flow cross section which is larger than that of the air economy position, wherein actuating means being associated to the control valve means and able to be activated in a manner dependent on the position of the output drive unit, such actuating means being able to cause a switching over of the control valve means into the air economy position when the output drive unit, owing to the compressed air flowing through the control valve means into the pneumatic drive, has reached an end of stroke position or a position just short thereof, wherein the air economy position is in the form of a choking position opening up a flow cross section which is smaller than that of the open position.
Dependencies are inferred from the claim text.