EP0874163A3 - A double two-channel drive system for a pressurized fluid flow - Google Patents

A double two-channel drive system for a pressurized fluid flow Download PDF

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Publication number
EP0874163A3
EP0874163A3 EP98850062A EP98850062A EP0874163A3 EP 0874163 A3 EP0874163 A3 EP 0874163A3 EP 98850062 A EP98850062 A EP 98850062A EP 98850062 A EP98850062 A EP 98850062A EP 0874163 A3 EP0874163 A3 EP 0874163A3
Authority
EP
European Patent Office
Prior art keywords
unit
power
drive
double
drive system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98850062A
Other languages
German (de)
French (fr)
Other versions
EP0874163A2 (en
Inventor
Uwe Wetzel
Nils Svensson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rudolf Westerberg AB
Original Assignee
Rudolf Westerberg AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rudolf Westerberg AB filed Critical Rudolf Westerberg AB
Publication of EP0874163A2 publication Critical patent/EP0874163A2/en
Publication of EP0874163A3 publication Critical patent/EP0874163A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/001—Double valve requiring the use of both hands simultaneously

Abstract

A pneumatic double two-channel drive system for a pneumatic linear power unit (10) is redundant and each movement of all components that may seriously malfunction is monitored. The system comprises two essentially identical units (1, 1') where each unit includes a drive device that is actuated by a control signal, for instance a drive signal generated by respective hands of the operator. The drive device (3) of one unit (1) delivers a start pulse and a holding signal for a power valve (6, 6') in the other unit (1") and vice versa. Each of the two power valves (6, 6') drives a monitoring valve (7, 7') and controls the supply of fluid to the power unit (10). Each unit includes an accumulator (4, 4') which is adapted to be charged when the system is at rest and discharged by actuation of respectice drive devices (3, 3'). The accumulator (4, 4') delivers a start pulse of limited duration, for actuation of one of the power valves. The system is connected to permit activation of the power unit (10) solely when the control pulses are delivered essentially simultaneously.
EP98850062A 1997-04-23 1998-04-23 A double two-channel drive system for a pressurized fluid flow Withdrawn EP0874163A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9701523A SE507552C2 (en) 1997-04-23 1997-04-23 Tvåhandsmanöversystem
SE9701523 1997-04-23

Publications (2)

Publication Number Publication Date
EP0874163A2 EP0874163A2 (en) 1998-10-28
EP0874163A3 true EP0874163A3 (en) 1999-03-17

Family

ID=20406693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98850062A Withdrawn EP0874163A3 (en) 1997-04-23 1998-04-23 A double two-channel drive system for a pressurized fluid flow

Country Status (2)

Country Link
EP (1) EP0874163A3 (en)
SE (1) SE507552C2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8666556B2 (en) 2009-12-10 2014-03-04 Alcon Research, Ltd. Systems and methods for dynamic feedforward
US8728108B2 (en) 2009-12-10 2014-05-20 Alcon Research, Ltd. Systems and methods for dynamic pneumatic valve driver
US8818564B2 (en) 2009-08-31 2014-08-26 Alcon Research, Ltd. Pneumatic pressure output control by drive valve duty cycle calibration
US8821524B2 (en) 2010-05-27 2014-09-02 Alcon Research, Ltd. Feedback control of on/off pneumatic actuators
US9060841B2 (en) 2011-08-31 2015-06-23 Alcon Research, Ltd. Enhanced flow vitrectomy probe

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE512859C2 (en) * 1999-05-07 2000-05-22 Rudolf Westerberg Ab Duplicated two-channel, pneumatic control system
US8679241B2 (en) 2006-10-30 2014-03-25 Novartis Ag Gas pressure monitor for pneumatic surgical machine
US8162000B2 (en) 2006-12-13 2012-04-24 Novartis Ag Adjustable pneumatic system for a surgical machine
US9241830B2 (en) 2006-12-15 2016-01-26 Novartis Ag Pressure monitor for pneumatic vitrectomy machine
US8312800B2 (en) 2006-12-21 2012-11-20 Novartis Ag Pneumatic system for a vitrector
US8080029B2 (en) 2007-09-21 2011-12-20 Novartis Ag System for actuation of a vitreous cutter
US8808318B2 (en) 2011-02-28 2014-08-19 Alcon Research, Ltd. Surgical probe with increased fluid flow
US10070990B2 (en) 2011-12-08 2018-09-11 Alcon Research, Ltd. Optimized pneumatic drive lines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH419849A (en) * 1964-02-13 1966-08-31 Herion Erich Servo control for a pressure consumer, in particular the clutch or brake of a press drive
DE9014789U1 (en) * 1990-10-25 1991-02-07 Herion-Werke Kg, 7012 Fellbach, De
DE9202938U1 (en) * 1992-03-05 1992-05-07 Herion-Werke Kg, 7012 Fellbach, De
US5113907A (en) * 1991-01-29 1992-05-19 Ross Operating Valve Company Dynamic self-monitoring air operating system
DE9406561U1 (en) * 1994-04-20 1994-07-14 Herion Werke Kg Safety valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH419849A (en) * 1964-02-13 1966-08-31 Herion Erich Servo control for a pressure consumer, in particular the clutch or brake of a press drive
DE9014789U1 (en) * 1990-10-25 1991-02-07 Herion-Werke Kg, 7012 Fellbach, De
US5113907A (en) * 1991-01-29 1992-05-19 Ross Operating Valve Company Dynamic self-monitoring air operating system
DE9202938U1 (en) * 1992-03-05 1992-05-07 Herion-Werke Kg, 7012 Fellbach, De
DE9406561U1 (en) * 1994-04-20 1994-07-14 Herion Werke Kg Safety valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8818564B2 (en) 2009-08-31 2014-08-26 Alcon Research, Ltd. Pneumatic pressure output control by drive valve duty cycle calibration
US8666556B2 (en) 2009-12-10 2014-03-04 Alcon Research, Ltd. Systems and methods for dynamic feedforward
US8728108B2 (en) 2009-12-10 2014-05-20 Alcon Research, Ltd. Systems and methods for dynamic pneumatic valve driver
US8821524B2 (en) 2010-05-27 2014-09-02 Alcon Research, Ltd. Feedback control of on/off pneumatic actuators
US9060841B2 (en) 2011-08-31 2015-06-23 Alcon Research, Ltd. Enhanced flow vitrectomy probe

Also Published As

Publication number Publication date
SE9701523L (en) 1998-06-22
SE9701523D0 (en) 1997-04-23
EP0874163A2 (en) 1998-10-28
SE507552C2 (en) 1998-06-22

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