US3599639A - Portable suction pump system - Google Patents

Portable suction pump system Download PDF

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Publication number
US3599639A
US3599639A US3599639DA US3599639A US 3599639 A US3599639 A US 3599639A US 3599639D A US3599639D A US 3599639DA US 3599639 A US3599639 A US 3599639A
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Prior art keywords
pump
suction
system
container
vacuum
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Donald R Spotz
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Borg-Warner Corp
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Borg-Warner Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/0066Suction pumps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/82Internal energy supply devices
    • A61M2205/8206Internal energy supply devices battery-operated
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/2931Diverse fluid containing pressure systems
    • Y10T137/3109Liquid filling by evacuating container

Abstract

A portable suction or vacuum pump system especially for medical use, which meets the requirements of pharyngeal and tracheal suctioning (high suction, low flow), gastric decompression or stomach pumping (moderate suction, low flow and cyclic operation), and pleural suctioning (low suction, high flow). Operation is by batteries, external DC or external AC by use of a power converter. A vacuum regulator and pump characteristics permit the various combinations of suction and flow.

Description

I United States Patent 1 3,599,639

[72] Inventor Donald R. Spoil 1,955,140 4/1934 McKesson 128/276 Cleveland, Ohio 3,1 12,061 11/1963 Breer 128/278 [21] Appl. No. 851,686 3,142,298 7/1964 Koski et a1... 128/276 [22] Filed Aug. 20, 1969 3,429,313 2/1969 Romanelli 128/276 [45] Patented Aug. 17, 1971 Prime ry Examiner-Charles F. Rosenbaum [73] Assignee Borg-Warner Corporation Atwmey Aubrey L. Burgess Chicago, Ill.

[54] PORTABLE SUCTION PUMP SYSTEM 7 Claims, 2 Drawing Figs.

[52] US. Cl 128/276, ABSTRACT: A m suction of vacuum pump system 137/205 especially for medical use, which meets the requirements of [51] Int. Cl A6lm 1/00 pharyngcal and tracheal suctioning (high suction 1 n [50] Field of Search 128/276- gastric decompression or stomach pumping (model-ale 278; 137/205 tion, low flow and cyclic operation), and pleural suctioning (low suction, high flow). Operation is by batteries, external [56] Rderences cued DC or external AC by use of a power converter. A vacuum UNITED STATES PATENTS regulator and pump characteristics permit the various com- 1,843, 169 2/1932 McKesson 128/276 binations ofsuction and flow.

VACUUM GAUGE? AIR FILTER Tuee FLOAT m EX FITTING VALVE 19 i MUFFLER MR L W- -F-Q 24 23 CHECK 17- -16 VALVE PRESSURE V T VACUUM 15 SWITCH 2o VACUUM BOTTLE VACUUM PUMP REGULATOR VALVE PATENTED AUG I 7 mm 21 AIR FHJTER q- 19 W MUFFLER EXHAUST VACUUM pump BATTERY TIM ER 26 .1- BA TERY CASE PLUG LOW VOLTAGE SWITCH INVENTOR DOA 440A? SW72 AT'TO RN PORTABLE SUCTION PUMP SYSTEM BACKGROUND OF THE INVENTION THE INVENTION The pumping system herein designed is portable, and because, of its component parts and their arrangement, is capable of providing various combinations of suction and flow, as required in medical use and especially in the field and is capable of operation from various power sources.

THE DRAWINGS FIG. 1 is a diagrammatic illustration of the vacuum circuit of the system of this invention; and

-' FIG. 2 is an electrical schematic associated with the system.

THE PREFERRED EMBODIMENT Looking at the drawings, there is diagrammatically illustrated the suction or vacuum part of the system in FIG. I and the electrical part of the system in [0. 2. In the system, a DC motor ll is coupled to a suction pump 12 preferably of the vane ,type in which the vanes and rotor are carbon and the remaining parts are constructed of corrosion resistant materials. In order to eliminate some servicing (except for periodic cleaning of the pump), the pump is preferably constructed with bearings which are grease lubricated for life. The carbon vanes also require no lubrication. While this general type of pump is preferred, other types of suction pumps can be used in the system if necessary or desirable. The motor 11 can-be energized by battery or from an external power source, as will later be described. I

. Thesuction or vacuum part of the system includes, in addition to the pump 12, a noise muffler 13 connected to the out let of the pump by a conduit 14, and a bottle or container 15 connected to the inlet of the pump by a conduit 16. A conduit 17 from the bottle 15 permits selective coupling of the bottle 15 to a pumping field. The bottle or container 15 acts as a suction orvacuum reservoir as well as a container for drain fluids, as will be described. I

In the line 16, there are an air filter and trap 18, a check valve 1 9, a vacuum regulator 20, a vacuum gauge 21-, a vacuum switch 22, a float valve 23, and a pressure vent valve 24.

The check valve 19 and the pressure vent valve 24 are of conventional construction. as for example a spring biased ball or member which when seated prohibits the passage of fluid there through and which when unseated permits the discharge offluid in one direction.

The 'floatvalve 23 is also ofconvent ional construction. For example, the valve may contain a float in a container which will block flow through a conduit when the fluid in the containerv reachesa certain'level.

The vacuum regulator 20 is also of conventionalconstruction inthat it contains an adjustable orifice, as forexamplea biased ball and a seat with meansto adjust'the bias. force.

Likewise, the vacuum switch 22 is of conventional'construction and includes adiaphragmconnected to a switch means, such that changes in the vacuum level'in the system cause actuation of-the switch means.

Because the variousparts are of conventionalconstruction, and well known in the art, no further detailed description is considered-necessary, it being understood that various constructions other than that described above could'be used'if their functions are equivalent.

In operation, the motor 11 effects rotation of the rotor (not shown) of the pump 12 resulting in the exhaustion of air through the noise muffler 13. To permit both a preselected suction limit in the bottle or container 15, as well as cyclic operation when necessary or desirable, other elements are included in the flow line or conduit 16. The vacuum regulator 20 permits the selection of a vacuum level at the bottle 15 by bleeding outside air into the system. at the selected level of vacuum and thus preventing excessive vacuum level. A vacuum switch 22 controls the energization of the motor 11 for cyclic operation, switching the motor on at a low value of vacuum and switching the motor off at the preset value, both values being factor set, while the vacuum gauge 21 indicates, for visual observation, the level of the vacuum in the bottle 15.

Accordingly, once thebottle 15 is evacuated to a'selected level, and air is'not permitted to enterthe system through the line or conduit 17, the level of vacuum in the bottle 15 remains, even through air flows to the pump 12.

The float valve 23 prevents fluid which has been collected or is collecting in the bottle 15 from travelling from the bottle to the pump 12. Thus, even if the container 15 is overfilled with fluids, and fluid reaches the float valve, the valve prevents flow of these fluids to the pump 12 by closing the conduit 16 to the pump.

Under certain circumstances, for example in pleural cavity suctioning, a pressure can be developed in the pumping field when a person breathes if the vacuum pump is not operating, which pressure must be vented to the atmosphere. Also, in the event of sudden reduced atmospheric pressure, as in the case of an aircraft pressurized cabin rupture, fluids may be forced back into the patient if the pressure difi'erential is not relieved. For these functions, the pressure vent valve 24 is provided.

Attention now directed to FIG. 2 of the drawings showing the electrical part of the system being described. This part includes the motor 11 connected through a three-position ganged selector switch 25 to alternative power sources, i.e., an internal battery 26 or to an external source (not shown) through a case plug 27. Between the positive side of the power source and the motor is an off-on switch 28. Preferably, the internal battery is rechargeable, as for example of the silver cadmium type. The external power supply unit, one which can be operatedfrom an AC source but which will supply DC to the motor 11 and regulated charging power to the battery. External power can also be any source of DC of correct voltage.

As is illustrated, the selector switch 25 has three positions. When in the No.1 position, currentis supplied from the external power source and also'the battery is charged if connected to a combination-battery charger power supply.

When in the NO. 2 position, current is supplied by the battery 26. This circuit includes an elapsed time timer 29 which indicates the length of time the system has been operating on the battery 26 and which indicates to the operator a need for battery recharging. The battery circuit includes a low voltage cutofl switch 30 which is responsive to battery voltage and which will cut off the motor 11 when the voltage is below a predetermined level, to prevent damage to the battery 26. During startup when using the battery, a switch 28A is mementarily closed to activate the low voltage switch. A mode switch 31, movable betweenopen and closed positions in- In-order-to indicate to the observer whether or not the unit is. in operation, a pilot light 32 is connected in parallel to the motor I1.

Attesting tothe portability of a unit incorporating the variousparts'enumerated, a self-contained, battery operated unit is'hou'sed in a shock-resistant aluminum case which is water tight when closed. Typical dimensions of such a case are 9 inches X 9%inches X l3 inches. Using a 20 volt battery pack of six 3.3 volt silver-cadmium batteries, rated 5.0 ampere hours, new batteries will provide about seven hours operation at a inch suction value. In the cased system, the collection container is capable of holding about 1600 cc of fluid. Such a unit weighs about I? pounds. 1

I claim:

1.. A suction pump system especially adaptable for medical use comprising a suction pump having an inlet and an outlet, said inlet being connected to a fitting for use with a patient;

means to drive said pump;

means including a power source for energizing said driving means;

a fluid collection and suction container connected between said pump inlet and to said fitting;

a check valve connected between said container and said inlet to permit air flow to said inlet and to prevent air flow to said container;

a regulator connected between said check valve and said container to regulate the degree of suction in said container;

a gauge connected between said check valve and said container to indicate the degree of suction in said container;

a vacuum switch connected between said check valve and said container for controlling the operation of said driving means;

a float valve connected between said check valve and said container for preventing fluid flow from said container to said pump; and

a vent valve connected to said container to permit exhaust from said container to the atmosphere.

2. A suction pump system as recited in claim 1 wherein said power source comprises battery means.

3. A suction pump system as recited in claim 2 wherein said battery means is rechargeable and said power source further comprises means to recharge said battery means.

4. A suction pump system as recited in claim 1 wherein said power means is external and comprises a source of DC current.

5. A suction pump system as recited in claim 1 wherein said power source is external and comprises a source of AC current.

6. A suction pump system as recited in claim 1 wherein said power source is internal and comprises a battery means, and said system further comprises a timer for indicating the length of time said battery means is operated.

7. A suction pump system as recited in claim 1 wherein said power source is internal and comprises a battery means, and said system further comprises a voltage cutout for stopping said motor when the voltage of said battery means reaches a predetermined level.

Claims (7)

1. A suction pump system especially adaptable for medical use comprising a suction pump having an inlet and an outlet, said inlet being connected to a fitting for use with a patient; means to drive said pump; means including a power source for energizing said driving means; a fluid collection and suction container connected between said pump inlet and to said fitting; a check valve connected between said container and said inlet to permit air flow to said inlet and to prevent air flow to said container; a regulator connected between said check valve and said container to regulate the degree of suction in said container; a gauge connected between said check valve and said container to indicate the degree of suction in said container; a vacuum switch connected between said check valve and said container for controlling the operation of said driving means; a float valve connected between said check valve and said container for preventing fluid flow from said container to said pump; and a vent valve connected to said container to permit exhaust from said container to the atmosphere.
2. A suction pump system as recited in claim 1 wherein said power source comprises battery means.
3. A suction pump system as recited in claim 2 wherein said battery means is rechargeable and said power source further comprises means to recharge said battery means.
4. A suction pump system as recited in claim 1 wherein said power means is external and comprises a source of DC current.
5. A suction pump system as recited in claim 1 wherein said power source is external and comprises a source of AC current.
6. A suction pump system as recited in claim 1 wherein said power source is internal and comprises a battery means, and said system further comprises a timer for indicating the length of time said battery means is operated.
7. A suction pump system as recited in claim 1 wherein said power source is internal and comprises a battery means, and said system further comprises a voltage cutout for stopping said motor when the voltage of said battery means reaches a predetermined level.
US3599639A 1969-08-20 1969-08-20 Portable suction pump system Expired - Lifetime US3599639A (en)

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Cited By (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665919A (en) * 1970-04-21 1972-05-30 Laerdal A S Suction apparatus
US3853128A (en) * 1972-07-10 1974-12-10 Deknated Inc Valved underwater drainage apparatus
US3920014A (en) * 1971-12-15 1975-11-18 Anton Banko Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field
US3963027A (en) * 1974-08-16 1976-06-15 Health Technology Labs, Inc. Medical/surgical suction equipment
US4007742A (en) * 1974-06-03 1977-02-15 Surgical Design Corporation. Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field
US4019514A (en) * 1974-06-03 1977-04-26 Surgical Design Corporation Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field
US4020840A (en) * 1974-09-18 1977-05-03 Richard Wolf Gmbh Device for catheterizing the bladder
US4057364A (en) * 1974-08-23 1977-11-08 John Bratschitsch Fluid transfer systems and valves therefor
US4687021A (en) * 1984-10-29 1987-08-18 Myotoku Ltd. Vacuum valve-sensor device
US4718895A (en) * 1986-01-24 1988-01-12 Bioresearch Inc. Suction regulator
US4795428A (en) * 1987-03-30 1989-01-03 Hwang Shyh Chyi Therapeutic suction device
US4930997A (en) * 1987-08-19 1990-06-05 Bennett Alan N Portable medical suction device
US5042518A (en) * 1990-10-25 1991-08-27 Singhe Upenda W Liquid elimination system for vacuum line
US5242404A (en) * 1992-02-12 1993-09-07 American Cyanamid Company Aspiration control system
US5419768A (en) * 1991-03-07 1995-05-30 Aeros Instruments, Inc. Electrical medical vacuum regulator
US5549139A (en) * 1989-10-27 1996-08-27 Storz Instrument Company Pneumatic controls for ophthalmic surgical system
US5590678A (en) * 1994-08-31 1997-01-07 F & F Filter- Und Fordertechnik Gmbh Device for the disposal of liquid media
US5624394A (en) * 1994-10-28 1997-04-29 Iolab Corporation Vacuum system and a method of operating a vacuum system
US5690102A (en) * 1987-04-22 1997-11-25 Intertechnique Head harness for a respiratory mask
US5769242A (en) * 1994-12-15 1998-06-23 Allmineral Aufbereitungs-Technik Gmbh & Co. Kg Air-pulsed jigging machine with exhaust air removal
US5810766A (en) * 1995-02-28 1998-09-22 Chiron Vision Corporation Infusion/aspiration apparatus with removable cassette
US6039045A (en) * 1987-04-22 2000-03-21 Intertechnique Head harness for respiratory mask
US20020108657A1 (en) * 2001-02-14 2002-08-15 Jen-Fu Chen Container provided with means to keep inside of container under a constant pressure
US20020183702A1 (en) * 1999-11-29 2002-12-05 Henley Alan Wayne Wound treatment apparatus
US6662831B2 (en) 2001-06-18 2003-12-16 Jen-Fu Chen Depression container
US20040172512A1 (en) * 2003-02-28 2004-09-02 Masashi Nakanishi Method, apparatus, and computer readable medium for managing back-up
US20040249353A1 (en) * 1999-11-29 2004-12-09 Risks James R. Wound treatment apparatus
US20050101940A1 (en) * 2003-08-28 2005-05-12 Radl Christopher L. Device for treating a wound
US20050159716A1 (en) * 2002-07-23 2005-07-21 Susumu Kobayashi Medical aspirator
US20060047240A1 (en) * 2004-08-27 2006-03-02 Atul Kumar Controlled tissue cavity distending system with minimal turbulence
US20070027414A1 (en) * 2005-07-28 2007-02-01 Integra Lifesciences Corporation Laminar construction negative pressure wound dressing including bioabsorbable material
US7195624B2 (en) 2001-12-26 2007-03-27 Hill-Rom Services, Inc. Vented vacuum bandage with irrigation for wound healing and method
US20070219532A1 (en) * 2005-07-14 2007-09-20 Boehringer Technologies, Lp Pump system for negative pressure wound therapy
US7338482B2 (en) 2002-02-28 2008-03-04 Hill-Rom Services, Inc. External catheter access to vacuum bandage
WO2007140208A3 (en) * 2006-05-24 2008-03-06 Nellcor Puritan Bennett Llc Systems and methods for regulating power in a medical device
US20080082084A1 (en) * 2006-09-29 2008-04-03 Hemostasis, Llc System and Method to Vent Gas From a Body Cavity
US20090005744A1 (en) * 2005-07-14 2009-01-01 Boehringer Laboratories, L.P. System for treating a wound with suction and method of detecting loss of suction
US20090023996A1 (en) * 2007-07-18 2009-01-22 Tetsuya Fujikura Insertion assisting device and endoscope apparatus
US7534927B2 (en) 2001-12-26 2009-05-19 Hill-Rom Services, Inc. Vacuum bandage packing
US20090221963A1 (en) * 2008-03-03 2009-09-03 Hemostasis, Llc System and Method to Vent Gas from a Body Cavity
US7678090B2 (en) 1999-11-29 2010-03-16 Risk Jr James R Wound treatment apparatus
US7723560B2 (en) 2001-12-26 2010-05-25 Lockwood Jeffrey S Wound vacuum therapy dressing kit
US7794438B2 (en) 1998-08-07 2010-09-14 Alan Wayne Henley Wound treatment apparatus
US7815616B2 (en) 2002-09-16 2010-10-19 Boehringer Technologies, L.P. Device for treating a wound
US7867206B2 (en) 2000-11-29 2011-01-11 Kci Licensing, Inc. Vacuum therapy and cleansing dressing for wounds
US7896856B2 (en) 2002-08-21 2011-03-01 Robert Petrosenko Wound packing for preventing wound closure
US7910791B2 (en) 2000-05-22 2011-03-22 Coffey Arthur C Combination SIS and vacuum bandage and method
US20110077605A1 (en) * 2005-07-14 2011-03-31 Boehringer Technologies, L.P. Pump system for negative pressure wound therapy
US7927318B2 (en) 2001-10-11 2011-04-19 Risk Jr James Robert Waste container for negative pressure therapy
US7981098B2 (en) 2002-09-16 2011-07-19 Boehringer Technologies, L.P. System for suction-assisted wound healing
US7988680B2 (en) 2000-11-29 2011-08-02 Kci Medical Resources Vacuum therapy and cleansing dressing for wounds
US8168848B2 (en) 2002-04-10 2012-05-01 KCI Medical Resources, Inc. Access openings in vacuum bandage
US20120271257A1 (en) * 2011-04-20 2012-10-25 Kci Licensing, Inc. System for purging negative pressure wound therapy system
US20130150813A1 (en) * 2007-07-02 2013-06-13 Smith & Nephew Plc Systems and methods for controlling operation of negative pressure wound therapy apparatus

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US3142298A (en) * 1962-01-29 1964-07-28 William L Koski Stomach pump apparatus
US3429313A (en) * 1966-02-01 1969-02-25 Ram Domestic Products Co Medical drainage pump

Cited By (84)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665919A (en) * 1970-04-21 1972-05-30 Laerdal A S Suction apparatus
US3920014A (en) * 1971-12-15 1975-11-18 Anton Banko Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field
US3853128A (en) * 1972-07-10 1974-12-10 Deknated Inc Valved underwater drainage apparatus
USRE29877E (en) * 1972-07-10 1979-01-09 Deknatel Inc. Valved underwater drainage apparatus
US4007742A (en) * 1974-06-03 1977-02-15 Surgical Design Corporation. Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field
US4019514A (en) * 1974-06-03 1977-04-26 Surgical Design Corporation Surgical system for controlling the infusion of fluid to and the evacuation of fluid and material from an operating field
US3963027A (en) * 1974-08-16 1976-06-15 Health Technology Labs, Inc. Medical/surgical suction equipment
US4057364A (en) * 1974-08-23 1977-11-08 John Bratschitsch Fluid transfer systems and valves therefor
US4020840A (en) * 1974-09-18 1977-05-03 Richard Wolf Gmbh Device for catheterizing the bladder
US4687021A (en) * 1984-10-29 1987-08-18 Myotoku Ltd. Vacuum valve-sensor device
US4718895A (en) * 1986-01-24 1988-01-12 Bioresearch Inc. Suction regulator
FR2609248A1 (en) * 1987-01-06 1988-07-08 Bioresearch Inc Cruise control suction to drainage device of a body cavity of a patient
US4795428A (en) * 1987-03-30 1989-01-03 Hwang Shyh Chyi Therapeutic suction device
US6039045A (en) * 1987-04-22 2000-03-21 Intertechnique Head harness for respiratory mask
US5690102A (en) * 1987-04-22 1997-11-25 Intertechnique Head harness for a respiratory mask
US4930997A (en) * 1987-08-19 1990-06-05 Bennett Alan N Portable medical suction device
US5857485A (en) * 1989-10-27 1999-01-12 Perkins; James T. Pneumatic controls for ophthalmic surgical system
US5549139A (en) * 1989-10-27 1996-08-27 Storz Instrument Company Pneumatic controls for ophthalmic surgical system
US5979494A (en) * 1989-10-27 1999-11-09 Bausch & Lomb Surgical, Inc. Pneumatic controls for ophthalmic surgical system
US5042518A (en) * 1990-10-25 1991-08-27 Singhe Upenda W Liquid elimination system for vacuum line
US5419768A (en) * 1991-03-07 1995-05-30 Aeros Instruments, Inc. Electrical medical vacuum regulator
US5242404A (en) * 1992-02-12 1993-09-07 American Cyanamid Company Aspiration control system
US5429601A (en) * 1992-02-12 1995-07-04 American Cyanamid Company Aspiration control system
US5590678A (en) * 1994-08-31 1997-01-07 F & F Filter- Und Fordertechnik Gmbh Device for the disposal of liquid media
US5795328A (en) * 1994-10-28 1998-08-18 Iolab Corporation Vacuum system and a method of operating a vacuum system
US5624394A (en) * 1994-10-28 1997-04-29 Iolab Corporation Vacuum system and a method of operating a vacuum system
US5769242A (en) * 1994-12-15 1998-06-23 Allmineral Aufbereitungs-Technik Gmbh & Co. Kg Air-pulsed jigging machine with exhaust air removal
US5810766A (en) * 1995-02-28 1998-09-22 Chiron Vision Corporation Infusion/aspiration apparatus with removable cassette
US8540687B2 (en) 1998-08-07 2013-09-24 Kci Licensing, Inc. Wound treatment apparatus
US7794438B2 (en) 1998-08-07 2010-09-14 Alan Wayne Henley Wound treatment apparatus
US20020183702A1 (en) * 1999-11-29 2002-12-05 Henley Alan Wayne Wound treatment apparatus
US8021348B2 (en) 1999-11-29 2011-09-20 Kci Medical Resources Wound treatment apparatus
US6800074B2 (en) * 1999-11-29 2004-10-05 Hill-Rom Services, Inc. Wound treatment apparatus
US20040249353A1 (en) * 1999-11-29 2004-12-09 Risks James R. Wound treatment apparatus
US7678090B2 (en) 1999-11-29 2010-03-16 Risk Jr James R Wound treatment apparatus
US7763000B2 (en) 1999-11-29 2010-07-27 Risk Jr James R Wound treatment apparatus having a display
US8747887B2 (en) 2000-05-22 2014-06-10 Kci Medical Resources Combination SIS and vacuum bandage and method
US7910791B2 (en) 2000-05-22 2011-03-22 Coffey Arthur C Combination SIS and vacuum bandage and method
US8246592B2 (en) 2000-11-29 2012-08-21 Kci Medical Resources Vacuum therapy and cleansing dressing for wounds
US7867206B2 (en) 2000-11-29 2011-01-11 Kci Licensing, Inc. Vacuum therapy and cleansing dressing for wounds
US7988680B2 (en) 2000-11-29 2011-08-02 Kci Medical Resources Vacuum therapy and cleansing dressing for wounds
US20020108657A1 (en) * 2001-02-14 2002-08-15 Jen-Fu Chen Container provided with means to keep inside of container under a constant pressure
US6662831B2 (en) 2001-06-18 2003-12-16 Jen-Fu Chen Depression container
US7927318B2 (en) 2001-10-11 2011-04-19 Risk Jr James Robert Waste container for negative pressure therapy
US7896864B2 (en) 2001-12-26 2011-03-01 Lockwood Jeffrey S Vented vacuum bandage with irrigation for wound healing and method
US7723560B2 (en) 2001-12-26 2010-05-25 Lockwood Jeffrey S Wound vacuum therapy dressing kit
US8350116B2 (en) 2001-12-26 2013-01-08 Kci Medical Resources Vacuum bandage packing
US7534927B2 (en) 2001-12-26 2009-05-19 Hill-Rom Services, Inc. Vacuum bandage packing
US7195624B2 (en) 2001-12-26 2007-03-27 Hill-Rom Services, Inc. Vented vacuum bandage with irrigation for wound healing and method
US7338482B2 (en) 2002-02-28 2008-03-04 Hill-Rom Services, Inc. External catheter access to vacuum bandage
US8168848B2 (en) 2002-04-10 2012-05-01 KCI Medical Resources, Inc. Access openings in vacuum bandage
US7276052B2 (en) * 2002-07-23 2007-10-02 Nipro Corporation Medical aspirator
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