US3646727A - Automatic compressor drain system - Google Patents
Automatic compressor drain system Download PDFInfo
- Publication number
- US3646727A US3646727A US3646727DA US3646727A US 3646727 A US3646727 A US 3646727A US 3646727D A US3646727D A US 3646727DA US 3646727 A US3646727 A US 3646727A
- Authority
- US
- United States
- Prior art keywords
- pressure
- orifice
- valve
- specified
- liquid
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/12—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by excess or release of pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2931—Diverse fluid containing pressure systems
- Y10T137/3003—Fluid separating traps or vents
- Y10T137/3102—With liquid emptying means
- Y10T137/3105—Self-emptying
Definitions
- the device of this invention makes use of the knowledge that in a system, comprising a first restriction, a small volume chamber and a second restriction communicating with each other, in that order, the pressure in the chamber, i.e., upstream from the second restriction, is higher in case a compressible fluid is passing through the system that when a liquid is passing therethrough given that the inlet pressures are equal in the two cases.
- the absolute chamber pressures and the pressure ratios of chamber pressure (liquid) to chamber pressure (air) depend upon the inlet pressure and the area ratio of the two restrictions and can be adjusted as desired.
- the chamber pressure P is a function of the inlet pressure P the area ratio R of the restrictions and the outside pressure P
- the cross-sectional area of the first restriction represented by A and the cross-sectional area of the second restriction represented by A the following equations represent the relationships to be applied:
- the device of this invention thus provides a strong signal (pressure jump) at the end of liquid flow which signal is applied in the device of this invention to immediately close the drain valve with a minimum of compressed gas loss.
- Other prior art drainage systems depended upon intermittent use of compressed air, again of no value where constant use is likely to occur over a period of hours or days.
- the advantages resident in the device of this invention include extremely high reliability because there are no internal moving parts that may be rendered inoperative by the presence of oil emulsion, sludge or debris resulting from internal corrosion and wear which make units featuring internal valves, joints, floats etc., inoperative within a short time.
- a further advantage of this device resides in its complete simplicity which reduces the cost of manufacturing and maintaining the condensate drainage system of this invention.
- FIG. 1 is a schematic representation of a condensate drainage system constructed according to the principles of this invention and designed for complete pneumatic operation;
- FIG. 2 is an enlarged fragmentary view of a spool valve to be used in the system of FIG. 1;
- FIG. 3 is a schematic representation of electrical controls applicable to the system of FIG. 1;
- FIG. 4 is a schematic representation of a condensate drainage system constructed according to the principles of this invention applied to a four-stage compressor;
- FIG. 5 is a sectional view of a sensing block with orifices and chamber designed to control the drainage of two stages of the compressor of FIG. 4;
- FIG. 6 is a schematic layout of the electrical connections for the operation of the condensate drainage system shown in FIG. 4.
- FIG. 1 there is shown schematically a moisture trap 12 of any type suitable to collect liquid in the bottom thereof as shown with a surface at 11 which moisture trap communicates by means (not shown) with a compressor or other source of compressed gas or high pressure steam or other compressible fluid from which a substantial amount of condensate could be expected to be formed.
- the moisture trap 12 communicates from a bottom area by way of line 13 with a normally closed, diaphragm operated valve 14 operatively connected and controlled by a diaphragm 16 mounted within a suitable diaphragm operating body 15 of a type well known in the compressed air field.
- the diaphragm operated valve 14 communicates by way of a line 17 with a first orifice l8 suitably sized in relation to a second orifice 19 to provide the pressure relationship hereinafter more fully set forth with communication maintained from the orifice 18 by way of a line 20 through a small volume sensing chamber 21 by way of a further line 22 through the second orifice l9 and a drainline 25 to a suitable place of disposal for condensate removed from the compressed air or gas.
- the sensing chamber 21 also communicates by way of a line 23 with one end of a spool valve chamber 26 with a spool valve 27 slidably retained therein.
- the spool valve body 26 communicates by way of a line 24 with the diaphragm operator body 15 for a purpose to be made clear.
- a mechanically or electrically operated three-way valve 30 supplied with low-pressure air by way of a line 32 from a source of such low pressure air, such as the first stage interstage of the respective compressor, and also communicating with the ambient atmosphere by way of a vent line 2?.
- the three-way valve 30 normally communicates line 28 with line 29 and the ambient atmosphere but upon operation by a timer (not shown) the valve 30 shuts off the line 29 and establishes communication between the lines 32 and 28 as hereinafter made plain.
- the spool valve body 26 contains a spool 27 slidably sealingly located within a stepped cylindrical bore 33 within the body 26 with the spool having an enlarged head portion 35 slidably sealingly received within an enlarged cylinder portion 36 of the bore 33 and the spool 27 being biased downwardly as viewed in FIG. 2 by a spring 37 suitably tensioned so that high pressure in the line 23 can move the spool until the piston portion 35 abuts against the end of a suitably adjusted stop screw 39 and low-pressure air from the line 28 communicating with the cylinder 36 space within the bore 33 under the piston portion 35 can hold the spool 27 in the upwardly biased position until the line 28 is vented.
- a spool relief 40 of smaller diameter than the main portion of the spool 27 in the normal position shown in FIG. 2 communicates line 28 with line 24 leaving other lines and passageways shut off except for a passageway 38 within the spool 27 which in the nonnal position communicates cylinder portion 36 with the ambient atmosphere through a body vent passageway 42.
- line 28 When the spool 27 is in its raised position with piston portion 35 against the stop screw 39 line 28 will be communicating by way of a branch body passageway 28' and spool passageway 38 with the cylinder portion 36 at the underside of the piston portion 35 while the spool relief 40 will connect line 24 with the ambient air by way of passageway 42 in the valve body 26.
- Operation of the device shown in FIG. 1 begins with the spool valve in the normal lowered position as shown in FIG. 2 with the three-way valve 30 connecting line 28 through line 29 to the atmosphere and line 28 connecting through the spool relief 40 with the line 24 and in turn communicating with the space within the diaphragm body to the left of the diaphragm 16 as seen in FIG. 1.
- a suitable timer operating the three-way valve 30 at selected intervals now so operates valve 30 that line 32 supplied with low pressure compressed air is put into communication with line 28 and through the relief 40 with line 24 and the interior of the diaphragm body 15 to apply pressure to the left hand side of the diaphragm 16 moving the diaphragm 16 to the right as seen in FIG. 1 to compress a spring 15 and to open the valve 14.
- the duration of the drainage period with valve 14 open depends entirely upon the presence of liquid within the moisture trap 12 and passing through chamber 21.
- the sudden pressure jump from chamber pressure (water) in the cited case 25 p.s.i.a. to chamber pressure (air) 52.5 p.s.i.a. immediately initiates the action which closes the valve 14 in a very short period of time depending only on the speed with which the components are designed to react.
- the four stages of Table I could each be equipped with the above described device either separately as to all drain components or with proper sequencing valves different pairs of orifices could be connected to a single spool valve body 26 set to operate at some pressure approximately 30 p.s.i.a. and with the proper size orifices the chamber pressure as shown could be 25 p.s.i.a. for the water phase even though the stage pressures vary from 65 p.s.i.a. to 4,500 p.s.i.a. as shown.
- a common setting of the spring 37 could be made to answer for all four stages.
- FIG. 3 there is shown an electric circuit to be used with the device of FIG. 1 except that diaphragm operated valve 14 and diaphragm operator body 15 are replaced by a solenoid operated valve 114 normally closed but open when energized and spool valve assembly 26 is replaced by a relay 118, 120 and a pressure switch 126 communicating with the chamber 21 by way of line 23.
- the electrical components of FIG. 3 are energized by a pair of conductors 115 suitably connected to a suitable source of electric energy and connected as shown through a timer switch 116, a relay operated double throw switch 118, normally in the position shown to energize the relay of the solenoid valve 114 whenever the timer switch 116 should close.
- the pressure switch 126 normally open but closable at a desired pressure setting, connected in series with the relay coil of the relay switch 118 and through said relay coil to the other side of the electric energy supply.
- the operation of the device of FIGS. 1 and 3 is as follows. After a suitable time has elapsed during which it would be expected that moisture trap 12 would be at least partially filled with liquid as at the level 11, the timer switch 116 closes and in doing so energizes the coil of the solenoid valve 114 causing valve 114 to open and initiate flow of liquid through line 17, first orifice 18, the chamber 21 and second orifice 19, continuing through the line 25 to a suitable place of disposal of the condensate from the moisture trap 12.
- FIGS. 4, 5 and 6 schematically illustrate interconnections for a moisture drain system on a multiple stage compressor 9, here shown as four stages.
- the compressor 9 is of a type well known in the art schematically represented as comprising a filter 41 suitably connected to furnish inlet air to a cylinder 42 of the compressor first stage with cylinder 42 having suitable inlet and outlet valves and communicating on its outlet side with an intercooler and moisture separator 43.
- the moisture separator and intercooler are connected to the inlet side of the second stage cylinder 44 similarly provided within inlet and outlet valves and connected on its outlet side to a second intercooler moisture separator 45, with third stage cylinder 46, third stage intercooler moisture separator 47, fourth stage cylinder 48 and fourth stage aftercooler moisture separator 49 similarly connected to accept inlet air from the next lower stage and deliver outlet air through a cooler and moisture separator to the next higher stage until the final stage cooler and moisture separator 9 is connected with a receiver or other place of storage and use of compressed air (not shown).
- Each moisture separator is connected by a suitable drain line to a respective moisture trap 50, 51, 52 or 53 with each moisture trap being connected to a respective solenoid operated valve 54, 55, 56 or 57 in turn connected with one or the other of two sensing chambers 58 and 60, in pairs, as shown.
- Sensing chamber 58 as best seen in FIG. 5 comprises for example a substantially hexagonal body 61 having a stepped through bore 78 extending centrally therethrough in a vertical direction as seen in FIG. 5 with an enlarged double threaded bore portion extending upwardly from the bottom hexagonal face and a smaller threaded portion extending downwardly from the top face with an intermediate diameter bore in the center of the body forming the actual sensing chamber 79 of this invention.
- a normally open pressure responsive switch 62 communicating with chamber 79 and adjustable to close at a desired pressure.
- Angularly disposed stepped bores extending inwardly and downwardly from the upward facing oblique faces of the hexagonal outline, intersect the bore 78 in the area of the chamber portion 79 so that four faces of the hexagonal outline are connected to the central chamber portion by bores.
- the two oblique bores are connected to respective solenoid valves 54 or 55 by lines 6 5 and 65, respectively.
- Located in reduced diameter portions of the oblique bores are orifice members 66 and 67, respectively, while in the lower portion of the bore 78 is a third orifice member 68.
- the orifices are selectively sized to provide first and second orifice relationships as shown in table II. For instance orifice member 66 has a bore of 0.078 inch diameter while orifice member 67 has a bore of 0.0585 inch diameter and orifice member 68 has a bore measuring 0.125 inch in diameter.
- Exemplary pressure and orifice sizes applying two sensing and 53 through solenoid valves 56 and 57 respectively, and having orifice members with bores sized according to those figures of Table II will act in a similar manner to close the switch 63 momentarily when liquid flowing through either valve 56 or 57 is completely exhausted and the pressure jump occurs in the case of stage 3 from 50.5 p.s.i.g. to 204.3 p.s.i.g. and in case of stage 4 from 37.0 p.s.i.g. to 277 p.s.i.g. With the pressure switch 63 set to close at 150 p.s.i. g. operation thereof will be assured according to the principles of this invention.
- FIG. 6 illustrates a way of connecting pressure switches 62 and 63 in a hybrid electromechanical and electronic circuit which will operate solenoid valves 54 through 57 as follows.
- the conductors 115 of FIG. 3 are in FIG. 6 similarly energized and a timing device 82 is set to sequentially close switches 83, 84, 85 and 86 serially for selected dwell times, at preselected intervals, which switches 83 to 86 are connected to open the normally closed valves 54 through 57, respectively, to initiate a condensate drain cycle for each stage.
- valve 54 With the switch 83 closed, valve 54 will be open and any liquid gathered in the moisture separator 43 having been delivered to the trap and from there traveling through the valve 54 will enter the sensing chamber 79 by way of orifice 66 and exit therefrom by way of orifice 68 through a drain pipe 70 suitably connected to a suitable location for disposing of the liquid condensate from any of the stages. While liquid is passing through the sensing chamber 79 from stage I a pressure of l3.3 p.s.i.g. will be effective therein. As soon as the liquid is exhausted, air flowing through will have a pressure of 30.1 p.s.i.g. causing the pressure switch 62 to close.
- Switch 62 is interposed between the conductors 115 and in series with the coil 89 of a double pole double throw switch 88.
- the closing of pressure switch 62 energizes the relay 89 of the switch 88 which opens the circuit through the solenoid valve 54 cans ing valve 54 to close immediately.
- switch 88 closes the circuit for the relay 89 of switch 88 and reenergizes the relay 93 of a time delay switch 92 set to open, for a short time, after a delay greater than the dwell time of the timer switch 83.
- the relay 93 and the relay 89 will be deenergized and the switch 88 revert to its original position as shown in FIG.
- stage 1 is operating at a and 2.
- all of the mechanical functions of the in conjunction with the orifice 68 giving an orifice area ratio tim r and the electri al functions of the various witches can Of 2.56 will result in a chamber pressure Of 13.3 p.s.i.g. With be accomplished by various electric and electronic connecwater and a pressure of 30.1 p.s.i.g. when air is flowing tions without departing from the scope of this invention. therethrough.
- stage 2 With suitable piping connections, tioned above for stage 2 will give a chamber pressure of 13.5 s$itably sized inlet orifices, a common chamber with common p.s.i.g. for liquid and a chamber pressure of 53.7 p.s.i.g.
- the method of controlling the discharge of condensed liquid from a pressurized gas container comprising; accumulating a quantity of liquid in a portion of such a container in open communication with a body of gas therein; selectively discharging said accumulated liquid from said container by the force of said pressurized gas through an opened exhaust path having an initial portion communicating with said portion of said container and a second portion immediately subsequent to said initial portion which initial and second portions are of a relative configuration providing a drop in the pressure of said liquid greater than the drop in the pressure of the gas during discharge through said first portion into said second portion, discontinuing said discharge by closing said exhaust path upon sensing the difference in pressure drop due to the flow of said pressurized gas into said second portion, and selectively opening said exhaust path after sequential portions of said liquid have been accumulated.
- a condensate drainage system comprising: accumulator means for accumulating liquid condensed from a body of pressurized gaseous substance with said liquid remaining pressurized by said gaseous substance; passageway means communicating with said accumulator means and defining a discharge path therefrom; valve means cooperable with said passageway means and selectively operable to open and close said passageway means; said passageway means having portions for conducting the discharge flow from said valve means, which consists of, in downstream sequence, a first flow restricting portion, a relatively unrestricted flow portion, a second flow restricting portion and a discharge outlet, actuatable means cooperable with said valve means and at least operable to close said valve means, and pressure difference sensing means cooperable with one of said portions of said passageway and operable to actuate said actuatable means.
- a condensate drain system as specified in claim 12 wherein said passageway means comprises: first orifice means in said discharge path, a second orifice means in said discharge path and a small volume chamber in said discharge path between said first orifice means and said second orifice means.
- a condensate drainage system as specified in claim 4 wherein said means for accumulating liquid comprises moisture separating means communicating with liquid trap means along said flow path.
Abstract
Description
Claims (9)
- 2. The method as specified in claim 1 wherein said discharging through said exhaust path comprises flow through a first orifice into a small volume chamber and flow out of said chamber through a second orifice to provide said drops in pressure.
- 3. The method as specified in claim 2 wherein said difference in pressure is sensed to provide a signal and said signal initiates operation of valve means to end said discharging.
- 4. A condensate drainage system comprising: accumulator means for accumulating liquid condensed from a body of pressurized gaseous substance with said liquid remaining pressurized by said gaseous substance; passageway means communicating with said accumulator means and defining a discharge path therefrom; valve means cooperable with said passageway means and selectively operable to open and close said passageway means; said passageway means having portions for conducting the discharge flow from said valve means, which consists of, in downstream sequence, a first flow restricting portion, a relatively unrestricted flow portion, a second flow restricting portion and a discharge outlet, actuatable means cooperable with said valve means and at least operable to close said valve means, and pressure difference sensing means cooperable with one of said portions of said passageway and operable to actuate said actuatable means.
- 5. A condensate drain system as specified in claim 12 wherein said passageway means comprises: first orifice means in said discharge path, a second orifice means in said discharge path and a small volume chamber in said discharge path between said first orifice means and said second orifice means.
- 6. A condensate drainage system as specified in claim 5 wherein the cross sectional area of said second orifice is greater than the cross sectional area of said first orifice.
- 7. A condensate drainage system as specified in claim 6 wherein said difference is an increase in pressure within said chamber at the end of said sensing liquid flow and said means is a pressure switch operable in response to such increase in pressure.
- 8. A condensate drainage system as specified in claim 7 wherein said pressure switch provides a signal which is an electrical impulse applicable to cause said valve means closing.
- 9. A condensate drainage system as specified in claim 4 wherein said means for accumulating liquid comprises moisture separating means communicating with liquid trap means along said flow path.
- 10. A condensate drainage system as specified in claim 4 wherein a timing means is connected to said valve means to open said valve means at desired intervals.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82936969A | 1969-06-02 | 1969-06-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3646727A true US3646727A (en) | 1972-03-07 |
Family
ID=25254344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3646727D Expired - Lifetime US3646727A (en) | 1969-06-02 | 1969-06-02 | Automatic compressor drain system |
Country Status (1)
Country | Link |
---|---|
US (1) | US3646727A (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747853A (en) * | 1986-07-02 | 1988-05-31 | Imperial Chemical Industries Plc | Pressure control |
US20050011742A1 (en) * | 2001-10-22 | 2005-01-20 | Soichiro Yamamoto | Distillation apparatus |
US20060222515A1 (en) * | 2005-03-29 | 2006-10-05 | Dresser-Rand Company | Drainage system for compressor separators |
US20080142093A1 (en) * | 2006-12-13 | 2008-06-19 | Alcon, Inc. | Adjustable Pneumatic System for a Surgical Machine |
US20080146988A1 (en) * | 2006-12-15 | 2008-06-19 | Alcon, Inc. | Pressure Monitor for Pneumatic Vitrectomy Machine |
US20080149197A1 (en) * | 2006-12-21 | 2008-06-26 | Denis Turner | Pneumatic system for a vitrector |
US20080168985A1 (en) * | 2006-10-30 | 2008-07-17 | Denis Turner | Gas Pressure Monitor for Pneumatic Surgical Machine |
US20090082715A1 (en) * | 2007-09-21 | 2009-03-26 | Charles Steven T | System and Method For Actuation of A Vitreous Cutter |
US20110054508A1 (en) * | 2009-08-31 | 2011-03-03 | Jiansheng Zhou | Pneumatic Pressure Output Control by Drive Valve Duty Cycle Calibration |
US8596292B2 (en) | 2010-09-09 | 2013-12-03 | Dresser-Rand Company | Flush-enabled controlled flow drain |
US8657935B2 (en) | 2010-07-20 | 2014-02-25 | Dresser-Rand Company | Combination of expansion and cooling to enhance separation |
US8663483B2 (en) | 2010-07-15 | 2014-03-04 | Dresser-Rand Company | Radial vane pack for rotary separators |
US8673159B2 (en) | 2010-07-15 | 2014-03-18 | Dresser-Rand Company | Enhanced in-line rotary separator |
US8728108B2 (en) | 2009-12-10 | 2014-05-20 | Alcon Research, Ltd. | Systems and methods for dynamic pneumatic valve driver |
US8808318B2 (en) | 2011-02-28 | 2014-08-19 | Alcon Research, Ltd. | Surgical probe with increased fluid flow |
US8821362B2 (en) | 2010-07-21 | 2014-09-02 | Dresser-Rand Company | Multiple modular in-line rotary separator bundle |
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 |
US9095856B2 (en) | 2010-02-10 | 2015-08-04 | Dresser-Rand Company | Separator fluid collector and method |
US9486360B2 (en) | 2013-12-05 | 2016-11-08 | Novartis Ag | Dual electromagnetic coil vitrectomy probe |
US10251782B2 (en) | 2014-10-29 | 2019-04-09 | Novartis Ag | Vitrectomy probe with a counterbalanced electromagnetic drive |
US20230072851A1 (en) * | 2020-01-22 | 2023-03-09 | Edwards Japan Limited | System for treating moisture in exhaust gas |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3486303A (en) * | 1967-11-13 | 1969-12-30 | Westinghouse Air Brake Co | Moisture removal apparatus for compressed air supply system |
US3509901A (en) * | 1967-12-19 | 1970-05-05 | Westinghouse Air Brake Co | Automatic cycling drain valve |
-
1969
- 1969-06-02 US US3646727D patent/US3646727A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3486303A (en) * | 1967-11-13 | 1969-12-30 | Westinghouse Air Brake Co | Moisture removal apparatus for compressed air supply system |
US3509901A (en) * | 1967-12-19 | 1970-05-05 | Westinghouse Air Brake Co | Automatic cycling drain valve |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747853A (en) * | 1986-07-02 | 1988-05-31 | Imperial Chemical Industries Plc | Pressure control |
US7531065B2 (en) * | 2001-10-22 | 2009-05-12 | Uni-Ram Corporation | Distillation apparatus |
US20050011742A1 (en) * | 2001-10-22 | 2005-01-20 | Soichiro Yamamoto | Distillation apparatus |
US20060222515A1 (en) * | 2005-03-29 | 2006-10-05 | Dresser-Rand Company | Drainage system for compressor separators |
US8075668B2 (en) * | 2005-03-29 | 2011-12-13 | Dresser-Rand Company | Drainage system for compressor separators |
US8679241B2 (en) * | 2006-10-30 | 2014-03-25 | Novartis Ag | Gas pressure monitor for pneumatic surgical machine |
US20080168985A1 (en) * | 2006-10-30 | 2008-07-17 | Denis Turner | Gas Pressure Monitor for Pneumatic Surgical Machine |
US9326826B2 (en) | 2006-10-30 | 2016-05-03 | 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 |
US20080142093A1 (en) * | 2006-12-13 | 2008-06-19 | Alcon, Inc. | Adjustable Pneumatic System for a Surgical Machine |
US20080146988A1 (en) * | 2006-12-15 | 2008-06-19 | Alcon, Inc. | Pressure Monitor for Pneumatic Vitrectomy Machine |
US9241830B2 (en) | 2006-12-15 | 2016-01-26 | Novartis Ag | Pressure monitor for pneumatic vitrectomy machine |
US20080149197A1 (en) * | 2006-12-21 | 2008-06-26 | Denis Turner | Pneumatic system for a vitrector |
US8312800B2 (en) | 2006-12-21 | 2012-11-20 | Novartis Ag | Pneumatic system for a vitrector |
US20090082715A1 (en) * | 2007-09-21 | 2009-03-26 | Charles Steven T | System and Method For Actuation of A Vitreous Cutter |
US8080029B2 (en) | 2007-09-21 | 2011-12-20 | Novartis Ag | System for actuation of a vitreous cutter |
US8818564B2 (en) | 2009-08-31 | 2014-08-26 | Alcon Research, Ltd. | Pneumatic pressure output control by drive valve duty cycle calibration |
US20110054508A1 (en) * | 2009-08-31 | 2011-03-03 | Jiansheng Zhou | Pneumatic Pressure Output Control by Drive Valve Duty Cycle Calibration |
US8728108B2 (en) | 2009-12-10 | 2014-05-20 | Alcon Research, Ltd. | Systems and methods for dynamic pneumatic valve driver |
US9095856B2 (en) | 2010-02-10 | 2015-08-04 | Dresser-Rand Company | Separator fluid collector and method |
US8821524B2 (en) | 2010-05-27 | 2014-09-02 | Alcon Research, Ltd. | Feedback control of on/off pneumatic actuators |
US8663483B2 (en) | 2010-07-15 | 2014-03-04 | Dresser-Rand Company | Radial vane pack for rotary separators |
US8673159B2 (en) | 2010-07-15 | 2014-03-18 | Dresser-Rand Company | Enhanced in-line rotary separator |
US8657935B2 (en) | 2010-07-20 | 2014-02-25 | Dresser-Rand Company | Combination of expansion and cooling to enhance separation |
US8821362B2 (en) | 2010-07-21 | 2014-09-02 | Dresser-Rand Company | Multiple modular in-line rotary separator bundle |
US8596292B2 (en) | 2010-09-09 | 2013-12-03 | Dresser-Rand Company | Flush-enabled controlled flow drain |
US8808318B2 (en) | 2011-02-28 | 2014-08-19 | Alcon Research, Ltd. | Surgical probe with increased fluid flow |
US9060841B2 (en) | 2011-08-31 | 2015-06-23 | Alcon Research, Ltd. | Enhanced flow vitrectomy probe |
US9486360B2 (en) | 2013-12-05 | 2016-11-08 | Novartis Ag | Dual electromagnetic coil vitrectomy probe |
US10251782B2 (en) | 2014-10-29 | 2019-04-09 | Novartis Ag | Vitrectomy probe with a counterbalanced electromagnetic drive |
US20230072851A1 (en) * | 2020-01-22 | 2023-03-09 | Edwards Japan Limited | System for treating moisture in exhaust gas |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3646727A (en) | Automatic compressor drain system | |
US5542499A (en) | Electromechanical oil level regulator | |
US4562855A (en) | Automatic drain valve | |
CA2210099A1 (en) | Magnetically controlled liquid transfer system | |
US5042518A (en) | Liquid elimination system for vacuum line | |
US4574829A (en) | Automatic drain valve | |
US4444217A (en) | Automatic drain trap | |
US2585045A (en) | Trap for compressed gas systems | |
AU6025599A (en) | Improved automatic drain valve | |
US4987919A (en) | Pneumatically activated drain valve for compressed air | |
US4573489A (en) | Dump valve | |
US1779319A (en) | Sewage-ejecting mechanism | |
US2361084A (en) | Drain valve apparatus | |
US3147884A (en) | Liquid delivering and metering apparatus and method | |
US3724231A (en) | Single stage dry cylinder compressor having automatic oil drain from suction chamber to crankcase | |
US20140299200A1 (en) | Liquid Condensate Collection and Drain Apparatus for Compressed Air-Gas Systems and Method Therefore | |
US2726675A (en) | Steam trap | |
RU2034629C1 (en) | Device to remove filtrate from vacuum-filter | |
SU1029036A2 (en) | Device for testing hollow articles by inner pressre | |
SU1724931A1 (en) | Compressor automatic blowing system | |
SU402686A1 (en) | ABOUT ISAI INVENTIONS402686 | |
RU2014267C1 (en) | Pneumatic pulse generator for breaking down hang-ups in bunkers | |
US3032051A (en) | Expulsion valve mechanism | |
CN209036281U (en) | One kind removing glue chamer body pumping equipment | |
JPH053749Y2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JOY TECHNOLOGIES INC., A CORP. OF DE.,PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY MANUFACTURING COMPANY, A CORP. OF PA;REEL/FRAME:004880/0430 Effective date: 19870529 Owner name: JOY TECHNOLOGIES INC., 301 GRANT STREET, PITTSBURG Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY, A CORP. OF PA;REEL/FRAME:004880/0430 Effective date: 19870529 Owner name: JOY MANUFACTURING COMPANY, 535 SMITHFIELD STREET, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WACHSMUTH, ERICH A.;REEL/FRAME:004718/0968 Effective date: 19690523 |
|
AS | Assignment |
Owner name: I.C. GROUP INC., A CORP. OF DE.,PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY MANUFACTURING COMPANY;REEL/FRAME:004729/0595 Effective date: 19870626 Owner name: CITIBANK, N.A.,NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:I C GROUP, INC.;REEL/FRAME:004759/0385 Effective date: 19870626 Owner name: CITIBANK, N.A., 641 LEXINGTON AVENUE, NEW YORK, NE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:I C GROUP, INC.;REEL/FRAME:004759/0385 Effective date: 19870626 Owner name: I.C. GROUP INC., 301 GRANT STREET, PITTSBURGH PA., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY;REEL/FRAME:004729/0595 Effective date: 19870626 |
|
AS | Assignment |
Owner name: JOY MANUFACTURING COMPANY,STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JOY TECHNOLOGIES INCL., (A DE CORP.);REEL/FRAME:004827/0367 Effective date: 19870626 Owner name: JOY MANUFACTURING COMPANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE DATE;ASSIGNOR:JOY TECHNOLOGIES INCL., (A DE CORP.);REEL/FRAME:004827/0367 Effective date: 19870626 |
|
AS | Assignment |
Owner name: COOPER INDUSTRIES, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:I C GROUP INC.;REEL/FRAME:006918/0189 Effective date: 19871123 |