US2871795A - Double acting diaphragm pump - Google Patents
Double acting diaphragm pump Download PDFInfo
- Publication number
- US2871795A US2871795A US568522A US56852256A US2871795A US 2871795 A US2871795 A US 2871795A US 568522 A US568522 A US 568522A US 56852256 A US56852256 A US 56852256A US 2871795 A US2871795 A US 2871795A
- Authority
- US
- United States
- Prior art keywords
- diaphragm
- pump
- fluid
- actuating lever
- inlet
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
- F04B53/1047—Flap valves the valve being formed by one or more flexible elements
- F04B53/105—Flap valves the valve being formed by one or more flexible elements one flexible element oscillating around a fixed point
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/023—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms double acting plate-like flexible member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
- F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
Definitions
- the invention relates to pumps, and particularly to double acting diaphragm pumps.
- An object of the invention is to provide a generally improved and more satisfactory double acting diaphragm pump.
- Another object is the provision of a pump of small physical dimensions which is simple in construction and operation and employs a minimum of moving parts which are not subject to rapid wear or corrosion.
- Still another object is to provide a pump, particularly suited for use with sensitive instruments such as laboratory test equipment, which is capable of delivering small amounts of fluid at a relatively accurate rate.
- a further object is the provision of a double acting diaphragm pump in which the diaphragm actuating lever is enclosed within and forms a part of the diaphragm itself, and the fluid flow control means include resilient flap valves.
- a still further object is to provide a pump formed of a series of parts secured in juxtaposed relationship for ease of manufacture, assembly, and repair.
- Figure l is a perspective view illustrating part of the structure in an exploded position, and with a portion thereof being broken away;
- Figure 2 is a front view of structure shown in Figure 1 in its assembled position
- Figure 3 is a left side view of the assembled structure shown in Figure 2;
- FIG. 4 is a fragmentary detail illustrating the operation of one of the pump flap valves.
- Figure 5 is a view similar to Figure 3 illustrating a modified form of diaphragm actuating lever.
- the invention relates to a double acting diaphragm pump formed of a plurality of parts individually fabricated and then secured together in juxtaposed relationship.
- the diaphragm actuating lever is enclosed within and forms a part of the diaphragm itself, and extends outwardly of the pump body where it is accessible for reciprocating movement.
- rial are employed to control the rate and direction of fluid flow.
- the pump has particular utility with test instruments where relatively small and accurate fluid delivery rates are desired, and the various parts maybe formed of inert materials when use of the pump with corrosive fluids is anticipated.
- the pump of the present invention is formed of a plurality of blocks or plates and sheets disposed in juxtaposed position and secured together to form an integral unit which is, in effect, two independent pump units actuated by a single diaphragm interposed therebetween.
- the corresponding parts on opposite sides of the diaphragm are mirror images of each other, and for the sake of clarity and simplicity, the description will be in general limited to the diaphragm and the parts to one side thereof, it being understood that parts on the opposite Flap valves of resilient mateto flow only toward the pump chamber.
- the diaphragm 7 is formed of two sheets of flexible material 9' posed therebetween, while the remaining portion of the.
- actuating lever 13 projects outwardly from the edge of the diaphragm in an accessible position for reciprocation as hereinafter described.
- the end of the actuating lever interposed between the sheets 9 and 11 is formed into a ring 15 which is positioned approximately centrally of the diaphragm so that the force exerted by reciprocating the actuating lever is transferred to and distributed along a substantial area of the diaphragm.
- the edges of the chamber blocks 17, adjacent the projecting portion of the actuating lever 13, are each formed with a tapered recess 21 which gradually decreases in dimension as it approaches the central opening 19. As shown in Figure l, the recesses 21 terminate before reaching the central opening 19 in the chamber blocks, and thus the segments 23 of the chamber blocks located between the central openings 19 and the innermost ends of the recesses 21 together serve as a fulcrum for the actuating lever 13.
- a rectangular block 25 which for convenience may be called a fluid passage block.
- the top edge of the block 25 is formed with an outlet port 27 and an inlet port 29 which connect, respectively, with 'the angulated outlet passage 31 and the inlet passage 33, both of which open on the face of the block 25 remote from the chamber block 17.
- An outlet channel 35 passes transversely and angularly through the block 25 with its lowermost end opening into the pump chamber opening 19. This channel allows gas bubbles to escape from the pump chamber and also serves as a means for discharging the fluid therefrom. Delivery of fiuid into the pump chamber is accomplished through an inlet channel 37 passing transversely through the block 25 and opening into the pump chamber 19 as best seen in Figure 2.
- flap valves formed by means of a flexible and resilient sheet 39, preferably of rubber.
- the sheet 39 is disposed against the outermost face of the block 25 and is provided with two semi-circular openings 41 and 43 which are, respectively, in alignment with the outlet passage 31 and the inlet channel 37.
- the portion directly below the opening 41 serves as a flap valve 45 which covers the end of the outlet channel 35 and prevents the passage of fluid therein while allowing fluid to freely flow therefrom.
- valve plate 49 is disposed against the sheet 39 and is provided with a pair of circular openings 51 and 53, which are in align ment with the openings 41 and 43 formed in the sheet 39 and provide an area Within which the resilient portions 45 and 47 of the sheet 39 can flex as hereinafter described.
- An end plate 55 is disposed against the face of the valve plate 49 and serves to close the openings 51 and 53. It is of course understood that the plate 49 may be of sufficient thickness so that the openings 51 and 53 may extend partially into the plate 49 and thus be closed at the end opposite the sheet 39. In this manner the end plate 55 may be entirely eliminated.
- the reciprocation of the actuating lever causes the diaphragm to induce a suction force anda pressure force in each of the pump chambers in an alternating relationship.
- the-suction and pressure forces in the .two individual pump units are also in alternate timed relationship .since the movement of the diaphragm in one direction creates .a suction force in one pump unit and a pressure force .in the other of the pump units, while a movement-.ofthe diaphragm in the opposite direction reverses the forces .induced in the respective pump units.
- the modified diaphragm actuating lever 65 has its fulcrum or axis, indicated by the broken line 67, lying in a plane tangent to the openings forming the chambers 19.
- the innermost end of the lever 65 is formed with a substantially right angled portion 69 and a ring 71 which together are secured between the pair of flexible sheets 'formingthe diaphragm 7, while its outermost'end is provided with an arm 73 to which a reciprocating movement can be applied by any suitable means, not shown.
- the central portion 75 of the lever 65 is not bonded *to the sheets'forming the diaphragm.
- the remainder of the pump structure shown in Figure 5 is thesame as described in regard to Figures 1-4.
- tapered recesses 21, as provided in the structure shown in Figures 1-4, are not necessary when theinodified diaphragm actuating lever is employed.
- the chamber blocks 17 are provided with corresponding arcuatev grooves, not shown, which together cooperate to form a passage for the central portion 75 of the lever 65.
- a double acting diaphragm pump having a pair of opposed pump chambers, a flexible diaphragm disposed between and separating said pair of opposed pump chambers, diaphragm actuating means connected in contact relation to said diaphragm and extending laterally therefrom, inlet and outlet means facilitating fluid flow into and from said pump chambers in response to movement of said diaphragm, and valve means for controlling the fluid flow through said inlet and outlet means.
- said actuating means includes a lever and said diaphragm includes two sheets of flexible material secured to each other in contact relation, with a portion of the lever interposed therebetween.
- valve means include resilient flap valves which cooperate with inlet and outlet means in response to the pressure and suction forces developed by said diaphragm for controlling the fluid flow.
- a diaphragm pump formed of a plurality of elements secured together in juxtaposed relationship and including a first member having a pump chamber formed therein, a flexible diaphragm disposed against one face of said first member and closing one end of said pump chamber, a second member disposed against the face of said first member opposite said diaphragm and having fluid inlet and outlet means facilitating fluid flow into and from said pump chamber, a third member disposed against said second member and having valve means for controlling the fluid flow through said inlet and outlet means, means disposed against the face of said third member remote from said second member and forming an end member for said pump, and means for actuating said diaphragm, said actuating means including a lever connected in contact relation to said diaphragm and extending laterally therefrom.
- first member is provided with a recess adjacent to said actuating lever and extending toward said pump chamber, with the area of said first member between said pump chamber and recess serving as a fulcrum for said actuating lever.
- said diaphragm includes a pair of flexible sheets secured to each other in contact relation with a portion of the actuating lever being interposed therebetween.
- said third member includes openings aligned with portions of said fluid inlet and outlet means, and resilient portions forming flap valves and cooperating with other portions of said fluid inlet and outlet means, said flap valves being flexible in response to the forces developed by movement of said diaphragm to control the direction and sequence of fluid flow.
- a diaphragm pump having a pump chamber, a flexible diaphragm closing one end of said pump chamber, a diaphragm actuating lever connected in contact relation to said diaphragm, said diaphragm actuating means extending outwardly from said pump along a plane substantially parallel to said diaphragm and perpendicularly to the axis of said pump. chamber, inlet and outlet means facilitating fluid flow into and from said pump chamber in response to movement of said diaphragm, and valve means for controlling the fluid flow through said inlet and outlet means.
- a diaphragm disposed between and separating said pump chambers, said diaphragm including a pair of flexible sheets secured to each other in contact relation, and an actuating lever interposed between said flexible sheets and having a portion extending laterally outward therefrom.
Description
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US568522A US2871795A (en) | 1956-02-29 | 1956-02-29 | Double acting diaphragm pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US568522A US2871795A (en) | 1956-02-29 | 1956-02-29 | Double acting diaphragm pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US2871795A true US2871795A (en) | 1959-02-03 |
Family
ID=24271641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US568522A Expired - Lifetime US2871795A (en) | 1956-02-29 | 1956-02-29 | Double acting diaphragm pump |
Country Status (1)
Country | Link |
---|---|
US (1) | US2871795A (en) |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2542383A1 (en) * | 1983-03-07 | 1984-09-14 | Gontie Louis | Device producing a reciprocating movement starting from a continuous pressure |
US4569643A (en) * | 1982-11-10 | 1986-02-11 | Draper Development Corporation Pty., Ltd. | Compact diaphragm pump for artesian bores |
US4978284A (en) * | 1990-03-01 | 1990-12-18 | Cook James E | Double acting simplex plunger pump |
US5669764A (en) * | 1994-10-07 | 1997-09-23 | Bayer Corporation | Pneumatic diaphragm pump |
US6286413B1 (en) * | 1998-02-20 | 2001-09-11 | Tol-O-Matic, Inc. | Diaphragm actuator |
EP1223348A3 (en) * | 2001-01-13 | 2003-12-03 | ThyssenKrupp Bilstein GmbH | Device for converting an hydraulic or pneumatic flow |
US20070077156A1 (en) * | 2005-07-13 | 2007-04-05 | Orr Troy J | Double diaphragm pump and related methods |
US20080077068A1 (en) * | 2005-07-13 | 2008-03-27 | Purity Solutions Llc | Diaphragm pump and related methods |
US20090016913A1 (en) * | 2007-07-11 | 2009-01-15 | Gast Manufacturing, Inc., A Division Of Idex Corporation | Balanced dual rocking piston pumps |
US20090137940A1 (en) * | 2007-11-26 | 2009-05-28 | Purity Solutions Llc | Diaphragm pump and related systems and methods |
US20090242061A1 (en) * | 2008-03-31 | 2009-10-01 | Microjet Technology Co., Ltd. | Dual-cavity fluid conveying apparatus |
EP2107246A3 (en) * | 2008-03-31 | 2011-08-17 | Microjet Technology Co., Ltd | Fluid transportation device having multiple double-chamber actuating structures |
US8926835B2 (en) | 2002-06-04 | 2015-01-06 | Fresenius Medical Care Deustschland Gmbh | Dialysis systems and related methods |
US8986254B2 (en) | 2009-03-20 | 2015-03-24 | Fresenius Medical Care Holdings, Inc. | Medical fluid pump systems and related components and methods |
US9011114B2 (en) | 2011-03-09 | 2015-04-21 | Fresenius Medical Care Holdings, Inc. | Medical fluid delivery sets and related systems and methods |
US20150147209A1 (en) * | 2013-11-25 | 2015-05-28 | General Electric Company | Downhole radially actuated longitudinal diaphragm pump |
US9180240B2 (en) | 2011-04-21 | 2015-11-10 | Fresenius Medical Care Holdings, Inc. | Medical fluid pumping systems and related devices and methods |
US9421314B2 (en) | 2009-07-15 | 2016-08-23 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US9500188B2 (en) | 2012-06-11 | 2016-11-22 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US9561323B2 (en) | 2013-03-14 | 2017-02-07 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassette leak detection methods and devices |
US9610392B2 (en) | 2012-06-08 | 2017-04-04 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US10117985B2 (en) | 2013-08-21 | 2018-11-06 | Fresenius Medical Care Holdings, Inc. | Determining a volume of medical fluid pumped into or out of a medical fluid cassette |
WO2020062245A1 (en) * | 2018-09-30 | 2020-04-02 | 深圳市大疆软件科技有限公司 | Diaphragm pump and agricultural unmanned aerial vehicle |
WO2020062244A1 (en) * | 2018-09-30 | 2020-04-02 | 深圳市大疆软件科技有限公司 | Diaphragm pump and agricultural unmanned aerial vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US109678A (en) * | 1870-11-29 | Improvement in pumps | ||
GB190412189A (en) * | 1904-05-28 | 1904-06-30 | Otto Krebs | Improvements in and connected with Pumps. |
US1296503A (en) * | 1917-05-07 | 1919-03-04 | Barnes Mfg Company | Diaphragm-pump. |
US1811557A (en) * | 1930-05-26 | 1931-06-23 | Edward N Ove | Double-acting pump |
US2185784A (en) * | 1938-05-27 | 1940-01-02 | Proportioneers Inc | Pump |
US2382798A (en) * | 1944-11-27 | 1945-08-14 | Langan Thomas | Bilge pump |
DE929832C (en) * | 1950-01-03 | 1955-07-04 | Martin Hergt | Double diaphragm pump |
-
1956
- 1956-02-29 US US568522A patent/US2871795A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US109678A (en) * | 1870-11-29 | Improvement in pumps | ||
GB190412189A (en) * | 1904-05-28 | 1904-06-30 | Otto Krebs | Improvements in and connected with Pumps. |
US1296503A (en) * | 1917-05-07 | 1919-03-04 | Barnes Mfg Company | Diaphragm-pump. |
US1811557A (en) * | 1930-05-26 | 1931-06-23 | Edward N Ove | Double-acting pump |
US2185784A (en) * | 1938-05-27 | 1940-01-02 | Proportioneers Inc | Pump |
US2382798A (en) * | 1944-11-27 | 1945-08-14 | Langan Thomas | Bilge pump |
DE929832C (en) * | 1950-01-03 | 1955-07-04 | Martin Hergt | Double diaphragm pump |
Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4569643A (en) * | 1982-11-10 | 1986-02-11 | Draper Development Corporation Pty., Ltd. | Compact diaphragm pump for artesian bores |
FR2542383A1 (en) * | 1983-03-07 | 1984-09-14 | Gontie Louis | Device producing a reciprocating movement starting from a continuous pressure |
US4978284A (en) * | 1990-03-01 | 1990-12-18 | Cook James E | Double acting simplex plunger pump |
US5669764A (en) * | 1994-10-07 | 1997-09-23 | Bayer Corporation | Pneumatic diaphragm pump |
US5902096A (en) * | 1994-10-07 | 1999-05-11 | Bayer Corporation | Diaphragm pump having multiple rigid layers with inlet and outlet check valves |
US6286413B1 (en) * | 1998-02-20 | 2001-09-11 | Tol-O-Matic, Inc. | Diaphragm actuator |
EP1223348A3 (en) * | 2001-01-13 | 2003-12-03 | ThyssenKrupp Bilstein GmbH | Device for converting an hydraulic or pneumatic flow |
US10471194B2 (en) | 2002-06-04 | 2019-11-12 | Fresenius Medical Care Deutschland Gmbh | Dialysis systems and related methods |
US9827359B2 (en) | 2002-06-04 | 2017-11-28 | Fresenius Medical Care Deutschland Gmbh | Dialysis systems and related methods |
US9101709B2 (en) | 2002-06-04 | 2015-08-11 | Fresenius Medical Care Deutschland Gmbh | Dialysis fluid cassettes and related systems and methods |
US8926835B2 (en) | 2002-06-04 | 2015-01-06 | Fresenius Medical Care Deustschland Gmbh | Dialysis systems and related methods |
US7717682B2 (en) * | 2005-07-13 | 2010-05-18 | Purity Solutions Llc | Double diaphragm pump and related methods |
US10578098B2 (en) | 2005-07-13 | 2020-03-03 | Baxter International Inc. | Medical fluid delivery device actuated via motive fluid |
US11384748B2 (en) | 2005-07-13 | 2022-07-12 | Baxter International Inc. | Blood treatment system having pulsatile blood intake |
US10670005B2 (en) | 2005-07-13 | 2020-06-02 | Baxter International Inc. | Diaphragm pumps and pumping systems |
US20080077068A1 (en) * | 2005-07-13 | 2008-03-27 | Purity Solutions Llc | Diaphragm pump and related methods |
US8197231B2 (en) | 2005-07-13 | 2012-06-12 | Purity Solutions Llc | Diaphragm pump and related methods |
US20070077156A1 (en) * | 2005-07-13 | 2007-04-05 | Orr Troy J | Double diaphragm pump and related methods |
US10590924B2 (en) | 2005-07-13 | 2020-03-17 | Baxter International Inc. | Medical fluid pumping system including pump and machine chassis mounting regime |
US8932032B2 (en) | 2005-07-13 | 2015-01-13 | Fresenius Medical Care Holdings, Inc. | Diaphragm pump and pumping systems |
US20090016913A1 (en) * | 2007-07-11 | 2009-01-15 | Gast Manufacturing, Inc., A Division Of Idex Corporation | Balanced dual rocking piston pumps |
US8328538B2 (en) * | 2007-07-11 | 2012-12-11 | Gast Manufacturing, Inc., A Unit Of Idex Corporation | Balanced dual rocking piston pumps |
US20090137940A1 (en) * | 2007-11-26 | 2009-05-28 | Purity Solutions Llc | Diaphragm pump and related systems and methods |
US8038640B2 (en) | 2007-11-26 | 2011-10-18 | Purity Solutions Llc | Diaphragm pump and related systems and methods |
EP2107243A3 (en) * | 2008-03-31 | 2015-04-15 | Microjet Technology Co., Ltd | Dual-cavity fluid conveying apparatus |
EP2107243A2 (en) * | 2008-03-31 | 2009-10-07 | Microjet Technology Co., Ltd | Dual-cavity fluid conveying apparatus |
EP2107246A3 (en) * | 2008-03-31 | 2011-08-17 | Microjet Technology Co., Ltd | Fluid transportation device having multiple double-chamber actuating structures |
US20090242061A1 (en) * | 2008-03-31 | 2009-10-01 | Microjet Technology Co., Ltd. | Dual-cavity fluid conveying apparatus |
US8986254B2 (en) | 2009-03-20 | 2015-03-24 | Fresenius Medical Care Holdings, Inc. | Medical fluid pump systems and related components and methods |
US10507276B2 (en) | 2009-07-15 | 2019-12-17 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US9421314B2 (en) | 2009-07-15 | 2016-08-23 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US9011114B2 (en) | 2011-03-09 | 2015-04-21 | Fresenius Medical Care Holdings, Inc. | Medical fluid delivery sets and related systems and methods |
US9624915B2 (en) | 2011-03-09 | 2017-04-18 | Fresenius Medical Care Holdings, Inc. | Medical fluid delivery sets and related systems and methods |
US10143791B2 (en) | 2011-04-21 | 2018-12-04 | Fresenius Medical Care Holdings, Inc. | Medical fluid pumping systems and related devices and methods |
US9180240B2 (en) | 2011-04-21 | 2015-11-10 | Fresenius Medical Care Holdings, Inc. | Medical fluid pumping systems and related devices and methods |
US9610392B2 (en) | 2012-06-08 | 2017-04-04 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US10463777B2 (en) | 2012-06-08 | 2019-11-05 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US11478578B2 (en) | 2012-06-08 | 2022-10-25 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US9500188B2 (en) | 2012-06-11 | 2016-11-22 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
US9561323B2 (en) | 2013-03-14 | 2017-02-07 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassette leak detection methods and devices |
US10539481B2 (en) | 2013-03-14 | 2020-01-21 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassette leak detection methods and devices |
US11262270B2 (en) | 2013-03-14 | 2022-03-01 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassette leak detection methods and devices |
US10117985B2 (en) | 2013-08-21 | 2018-11-06 | Fresenius Medical Care Holdings, Inc. | Determining a volume of medical fluid pumped into or out of a medical fluid cassette |
US11291753B2 (en) | 2013-08-21 | 2022-04-05 | Fresenius Medical Care Holdings, Inc. | Determining a volume of medical fluid pumped into or out of a medical fluid cassette |
US10047738B2 (en) * | 2013-11-25 | 2018-08-14 | General Electric Company | Downhole radially actuated longitudinal diaphragm pump |
US20150147209A1 (en) * | 2013-11-25 | 2015-05-28 | General Electric Company | Downhole radially actuated longitudinal diaphragm pump |
WO2020062245A1 (en) * | 2018-09-30 | 2020-04-02 | 深圳市大疆软件科技有限公司 | Diaphragm pump and agricultural unmanned aerial vehicle |
WO2020062244A1 (en) * | 2018-09-30 | 2020-04-02 | 深圳市大疆软件科技有限公司 | Diaphragm pump and agricultural unmanned aerial vehicle |
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AS | Assignment |
Owner name: BALBOA INSURANCE COMPANY C/O THE PAUL REVERE EQUIT Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: JOHN HANCOCK MUTUAL LIFE INSURANCE COMPANY JOHN HA Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: NEW ENGLAND MUTUAL LIFE INSURANCE COMPANY 501 BOYL Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: PROVIDENT ALLIANCE LIFE INSURANCE COMPANY C/O THE Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: PAUL REVERE LIFE INSURANCE COMPANY THE C/O THE PAU Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 Owner name: WALTER E. HELLER & COMPANY, INC., A CORP. OF DEL. Free format text: AGREEMENT WHEREBY AETNA RELEASES AVTEX FROM ALL MORTAGES AND SECURITY INTERESTS IN SAID INVENTIONS AS OF JANUARY 11,1979, AND ASSIGNS TO ASSIGNEE THE ENTIRE INTEREST IN SAID MORTAGE AGREEMENT TO ASSIGNEE;ASSIGNORS:AETNA BUSINESS CREDIT, INC., A CORP. OF N.Y.;AVTEX FIBERS, INC, A CORP. OF NY;KELLOGG CREDIT CORP., A CORP. OF DEL.;REEL/FRAME:003959/0250 Effective date: 19800326 Owner name: KELLOGG CREDIT CORPORATION A DE CORP. Free format text: AGREEMENT WHEREBY SAID HELLER AND RAYONIER RELEASES ALL MORTGAGES AND SECURITY INTERESTS HELD BY AVTEX ON APRIL 28, 1978, AND JAN. 11, 1979, RESPECTIVELY AND ASSIGNS ITS ENTIRE INTEREST IN SAID MORT-AGAGE AGREEMENT TO ASSIGNEE;ASSIGNORS:WALTER E. HELLER & COMPANY, INC. A NY CORP.;ITT RAYONIER INCORPORATED, A DE CORP.;AVTEX FIBERS INC., A NY CORP.;REEL/FRAME:003959/0350 Effective date: 19800326 Owner name: WESTERN AND SOUTHERN LIFE INSURANCE COMPANY THE C/ Free format text: AS SECURITY FOR INDEBTEDNESS RECITED ASSIGNOR GRANTS , BARGAINS, MORTGAGES, PLEDGES, SELLS AND CREATES A SECURITY INTEREST WITH A LIEN UNDER SAID PATENTS, SUBJECT TO CONDITIONS RECITED.;ASSIGNOR:AVTEX FIBERS INC. A NY CORP.;REEL/FRAME:003959/0219 Effective date: 19810301 |