US3801232A - Diaphragm pump - Google Patents
Diaphragm pump Download PDFInfo
- Publication number
- US3801232A US3801232A US00280816A US3801232DA US3801232A US 3801232 A US3801232 A US 3801232A US 00280816 A US00280816 A US 00280816A US 3801232D A US3801232D A US 3801232DA US 3801232 A US3801232 A US 3801232A
- Authority
- US
- United States
- Prior art keywords
- yoke
- housing
- camshaft
- strain
- gear
- 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
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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
- 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
-
- 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
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
Definitions
- Kilayko Apr. 2, 1974 DIAPHRAGM PUMP 57 ABSTRACT
- Inventor Enrique Locsin Kilayko, A diaphragm pump having a housing, an operating rod Auburndale, Mass. projecting within the housing and mounted therein for [73]
- Assignee Precision Control Products recipgoating zq fi f fi a roiatable Corporation, waltham, Mass. cams a t mounte In t e ousmg or reciprocating the operating rod, an electric motor for driving the cam- [22]
- Such gearing includes an external ring [52] US. Cl. 417/413, 92/13.8 gear having internal teeth fixed to the housing, a de- [51] Int. Cl...
- F04b 43/00, F04b 45/00, F15b 15/24 formable internal strain gear having external teeth in [58] Field of Search 417/413, 470, 471; cooperative engagement with the ring gear, the strain 92/13.8 gear being drivingly connected to the camshaft, and a strain inducer mounted internally of the strain gear in [56] References Cited cooperative engagement therewith, the strain inducer UNITED STATES PATENTS being drivingly connected to the motor.
- the pump 2,718,343 9/1955 Brown 417 413 also inclfdes a yoke fixed) the operatlng rod within 2,906,143 9/1959 Musscr 74/640 the housing, cam and follower means interposed be- 2359960 10/1944 Anderson 417/471 tween the camshaft and yoke for driving the yoke in 3,157,221 11/1964 Keil 417/214 one direction, spring means interposed between the 1,905,284 4/1933 Heitger 417/471 yoke and the housing for moving the yoke in an oppo- 2,9l2,935 11/1959 W at 2/ site direction and adjustable stop means for limiting 3,175,473 3965 movement of the yoke in the opposite direction to es- Boteler et al. 92/13.8
- PATENTEDAPR 2 I974 SHZET 3 OF 3 IFIG. 4 32 DIAPHRAGM PUMP
- This invention relates to diaphragm pumps for chemical metering and the like and more particularly to a novel drive mechanism for such pumps.
- the present invention provides, in a diaphragm pump having a housing, an operating rod projecting within the housing and mounted therein for reciprocating translational movement, a rotatable chamshaft mounted in the housing for reciprocating the operating rod and an electric motor for driving the camshaft, strain wave speed reducing gearing interposed between the motor and camshaft for rotating the camshaft at slow speed from the relatively high speed motor.
- gearing includes an external ring gear having internal teeth fixed to the housing, a deformable internal strain gear having external teeth in cooperative engagement with the ring gear, the strain gear being drivingly connected to the camshaft, and a strain inducer mounted internally of the strain gear in cooperative engagement therewith, the strain inducer being drivingly connected to the motor.
- the pump of the invention may also include a yoke fixed to the operating rod within the housing, said yoke having a central opening with its axis perpendicular to the operating rod with the camshaft extending through it, cam and follower means interposed between the camshaft and yoke for driving the yoke in one direction, spring means interposed between the yoke and the housing for moving the yoke in an opposite direction and adjustable stop means for limiting movement of the yoke in the opposite direction to establish an adjustably predetermined stroke of the pump.
- FIG. 1 is an exploded isometric view, partly in section, of a diaphragm pump according to the invention
- FIGS. 2, 3 and 4 are, respectively, top, side and end sectional views of the pump of FIG. 1;
- FIG. 5 is a cross-sectional view of a portion of the pump of FIGS. 1 through 4, taken on line 55 of FIG. 4;
- valve housing 24 to accomplish the pumping function in a well-known manner.
- a novel' drive mechanism for reciprocating diaphragm operating rod 14 from a relatively high speed electric driving motor 30.
- such mechanism includes a yoke 32, having a central opening 34, fixed to operating rod 14 within housing 12, a camshaft 40 mounted in said housing and extending through said yoke central opening, cam and follower means interposed between camshaft 40 and yoke 32 and strain wave speed reducing gearing, generally designated 60, interposed between motor and camshaft 40 for rotating said camshaft at slow speed.
- yoke 32 is generally planar and is rigidly mounted on the end of operating rod 14 generally parallel to the axis thereof within housing 12. It .is provided on the same side as operating rod 14 with upper and lower slide rods 36 slidably mounted therein, which rods bear against the wall of housing 12. Compression springs 38 are interposed between the remote ends of slide rods 36 in contact with housing 12 and yoke 32, normally to urge yoke 32 in a direction away from the wall of housing 12 upon which said rods bear. On its opposite side from operating rod 14, yoke 32 is provided with an adjustable stop mechanism for limiting movement of yoke 32 in the direction in which it is urged by springs 38.
- a stop mechanism slide rod 50 is centrally mounted on yoke 32, said rod being slidably received within a bore 52 on screw threaded adjusting member 54 which is threadably mounted in housing 12 and has its end within said housing adapted for contact with yoke 32.
- a knob 56 is provided on the end of member 54 outside of the housing for adjusting its axial position to establish an adjustably predeterminedstroke of diaphragm operating rod 14.
- FIGS. 6 through 9 are cross-sectional detail views showing successive steps in the operation of the portion of FIG. 5.
- a diaphragm pump of the type having a housing 12 with a diaphragm operating rod 14 projecting within said housing and mounted therein for reciprocating translational movement.
- operating rod 14 On its outer free end, operating rod 14 carries a flexible diaphragm 16 which is the operating element of a diaphragm pump, such as is shown in US. Pat. No. 2,741,187, for example.
- housing 12 has a circular boss 13 on one of its outer walls to which is secured the outer margin of diaphragm 16 by clamping it between said boss and the rim of a cup shaped pump base member 18, forming an enclosed sealed pumping compartment 20 of which diaphragm 16 is a reciprocating wall.
- the pumping compartment 20 is connected through 44 rotatably mounted on yoke 32 on the same side as operating rod 14 with its operating surface exposed within yoke central opening 34.
- Camshaft 40 itself is driven at slow speed from motor 30 through strain wave speed reducing gearing 60, such gearing being disclosed in US. Pat. No. 2,906,]43 for example.
- gearing 60 has a ratio of 48:! and includes an external ring gear 61 having axially extending internal teeth 62 fixed to housing 12, a deformable internal strain gear 64 having axially extending external teeth 65, at the same diametral pitch but of a slightly smaller pitch diameter, in number two less than those of ring gear 61, in cooperative engagement with the teeth 62 of ring gear 61 and a strain inducer mounted internally of strain gear 64 in cooperative engagement therewith.
- the difference in pitch diameter is caused by the fact that the number of teeth in this case on the strain gear is less than the number of teeth on the ring gear.
- the difference in the number of teeth between the two gears, or the tooth differential is equal to or a multiple of the number of places at which the strain gear is deflected to cause tooth en gagement with the ring gear.
- This differential is desirably two, using a strain inducer having an elliptical contour with two lobes.
- the strain gear is made of a material which is elastic under the conditions of operation, and in the case of a steel strain gear, is made of relatively thin cross section so that it can be deflected easily in a radial direction.
- the strain inducer includes, mounted on'the shaft 31 of motor 30, an elliptical strain inducer member 70 having on its outer surface a ball bearing race 72 carrying bearing balls 74 which rotatably support the deformable strain gear 64.
- the strain inducer When the strain inducer is inserted into a position inside the strain gear, it causes the strain gear to be distorted into elliptical form, with the distance from the gear axis to the pitch-line of the teeth at the major axis equal to the pitch diameter of the ring gear. At the major axis the pitch circles of the two gears are coincident. At the minor axis the distance of the pitch line of the strain gear teeth from the gear axis is less than the pitch diameter of the ring gear, and if a full tooth height is used, -the teeth will just clear one another. At intermediate points, the teeth will have varying degrees of engage- 'ment. This condition prevails where the tooth differential is equal to the number of lobes on the strain inducer which in this case is two.
- FIGS. 5 through 9 are illustrative of the above.
- motor shaft 31 rotates elliptical strain inducer 70 at a speed "of 3450 r.p.m., which in turn drives strain gear 64 within fixed ring gear at a speed i of 72 r.p.m. to rotate camshaft 40.
- eccentric cam element 42 moves yoke 32 in opposition to springs 38 to provide the forward an operating rod projecting within said housing and mounted therein for reciprocating translational movement a yoke fixed to said operating rod within said housing, said yoke having a central opening with its axis perpendicular to said operating rod a camshaft mounted in said housing and extending through said yoke central opening cam and follower means interposed between said camshaft and said yoke for driving said yoke in one direction at least one spring loaded plunger mounted on said yoke for moving said yoke in an opposite direction between said yoke and said housing adjustable stop means for limiting movement of said yoke in said opposite direction to establish an adjustably predetermined stroke of said operating rod
- said adjustable stop means including screw threaded means threadably mounted in said housing and having an end within said housing forcontacting saidyoke an electric motor for driving said camshaft, and
- strain wave speed reducing gearing interposed between said motor and said camshaft for rotating said camshaft at slow speed, including an external ring gear having internal teeth fixed to said housing a deformable internal strain gear having external teeth in cooperative engagement with said ring gear, said strain gear being drivingly connected to said camshaft and a strain inducer mounted internally of said strain gear in cooperative engagement therewith, saidstrain inducer being drivingly connected to said motor.
Abstract
Description
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US28081672A | 1972-08-15 | 1972-08-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3801232A true US3801232A (en) | 1974-04-02 |
Family
ID=23074777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00280816A Expired - Lifetime US3801232A (en) | 1972-08-15 | 1972-08-15 | Diaphragm pump |
Country Status (2)
Country | Link |
---|---|
US (1) | US3801232A (en) |
JP (1) | JPS4946205A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4167896A (en) * | 1977-08-11 | 1979-09-18 | Gustafson, Inc. | Pump for auger treater |
US4931000A (en) * | 1989-03-02 | 1990-06-05 | Gilian Instrument Corp. | Double acting diaphragm air pump |
EP0538123A1 (en) * | 1991-10-17 | 1993-04-21 | Pcm Pompes | Diaphragmpump with continuously adjustable delivery between zero and a maximum value |
US5219274A (en) * | 1992-08-10 | 1993-06-15 | Tuthill Corporation | Pump with internal pressure relief |
US5437218A (en) * | 1994-04-04 | 1995-08-01 | Pcm Pompes | Diaphragm pump having variable displacement |
US5957669A (en) * | 1995-06-15 | 1999-09-28 | United States Filter Corporation | Diaphragm pump including improved drive mechanism and pump head |
US6354819B1 (en) | 1996-06-14 | 2002-03-12 | United States Filter Corporation | Diaphragm pump including improved drive mechanism and pump head |
WO2005010361A2 (en) * | 2003-07-29 | 2005-02-03 | Oridion Medical 1987 Ltd. | Diaphragm pump |
WO2009116045A1 (en) * | 2008-03-20 | 2009-09-24 | Gaia Med Ltd. | Miniature disposable or. partially reusable membrane dosing pump |
CN104963833A (en) * | 2015-06-10 | 2015-10-07 | 安庆联控机电科技发展有限公司 | Eccentric shaft sleeve device of honing grinding fluid pump |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53122112A (en) * | 1977-03-31 | 1978-10-25 | Ooyaratsukusu Kk | Variableevolume type diaphragm pump |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1905284A (en) * | 1928-09-27 | 1933-04-25 | Mattie G Heitger | Pump |
US2359960A (en) * | 1943-08-12 | 1944-10-10 | Chicago & Southern Air Lines I | Pumping mechanism |
US2718343A (en) * | 1952-10-17 | 1955-09-20 | Brown Grease Gun Company | Combination dispensing and siphoning nozzle and pumping means |
US2906143A (en) * | 1955-03-21 | 1959-09-29 | United Shoe Machinery Corp | Strain wave gearing |
US2912935A (en) * | 1954-12-04 | 1959-11-17 | Karl Schroeder | Fuel injection pump |
US3157221A (en) * | 1961-08-07 | 1964-11-17 | Holley Carburetor Co | Fluid supply system |
US3175473A (en) * | 1962-05-01 | 1965-03-30 | Grinnell Corp | Spring and fluid pressure actuator |
-
1972
- 1972-08-15 US US00280816A patent/US3801232A/en not_active Expired - Lifetime
- 1972-10-25 JP JP47106336A patent/JPS4946205A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1905284A (en) * | 1928-09-27 | 1933-04-25 | Mattie G Heitger | Pump |
US2359960A (en) * | 1943-08-12 | 1944-10-10 | Chicago & Southern Air Lines I | Pumping mechanism |
US2718343A (en) * | 1952-10-17 | 1955-09-20 | Brown Grease Gun Company | Combination dispensing and siphoning nozzle and pumping means |
US2912935A (en) * | 1954-12-04 | 1959-11-17 | Karl Schroeder | Fuel injection pump |
US2906143A (en) * | 1955-03-21 | 1959-09-29 | United Shoe Machinery Corp | Strain wave gearing |
US3157221A (en) * | 1961-08-07 | 1964-11-17 | Holley Carburetor Co | Fluid supply system |
US3175473A (en) * | 1962-05-01 | 1965-03-30 | Grinnell Corp | Spring and fluid pressure actuator |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4167896A (en) * | 1977-08-11 | 1979-09-18 | Gustafson, Inc. | Pump for auger treater |
US4931000A (en) * | 1989-03-02 | 1990-06-05 | Gilian Instrument Corp. | Double acting diaphragm air pump |
EP0538123A1 (en) * | 1991-10-17 | 1993-04-21 | Pcm Pompes | Diaphragmpump with continuously adjustable delivery between zero and a maximum value |
FR2682720A1 (en) * | 1991-10-17 | 1993-04-23 | Pcm Pompes | CONTINUOUSLY ADJUSTABLE FLOW PUMP PROCESS BETWEEN A ZERO VALUE AND A MAXIMUM VALUE AND ADJUSTABLE FLOW PUMP USING THE SAME. |
US5219274A (en) * | 1992-08-10 | 1993-06-15 | Tuthill Corporation | Pump with internal pressure relief |
WO1994003727A1 (en) * | 1992-08-10 | 1994-02-17 | Tuthill Corporation | Pump with internal pressure relief |
US5437218A (en) * | 1994-04-04 | 1995-08-01 | Pcm Pompes | Diaphragm pump having variable displacement |
US5957669A (en) * | 1995-06-15 | 1999-09-28 | United States Filter Corporation | Diaphragm pump including improved drive mechanism and pump head |
US6354819B1 (en) | 1996-06-14 | 2002-03-12 | United States Filter Corporation | Diaphragm pump including improved drive mechanism and pump head |
WO2005010361A2 (en) * | 2003-07-29 | 2005-02-03 | Oridion Medical 1987 Ltd. | Diaphragm pump |
WO2005010361A3 (en) * | 2003-07-29 | 2005-04-14 | Oridion Medical 1987 Ltd | Diaphragm pump |
US20070081907A1 (en) * | 2003-07-29 | 2007-04-12 | Oridion Medical 1987 Ltd | Diaphragm pump |
US20080298987A9 (en) * | 2003-07-29 | 2008-12-04 | Oridion Medical 1987 Ltd | Diaphragm pump |
US7726954B2 (en) | 2003-07-29 | 2010-06-01 | Oridion Medical 1987 Ltd. | Diaphragm pump |
WO2009116045A1 (en) * | 2008-03-20 | 2009-09-24 | Gaia Med Ltd. | Miniature disposable or. partially reusable membrane dosing pump |
CN102036702A (en) * | 2008-03-20 | 2011-04-27 | 佳亚梅德有限公司 | Miniature disposable or partially reusable membrane dosing pump |
CN104963833A (en) * | 2015-06-10 | 2015-10-07 | 安庆联控机电科技发展有限公司 | Eccentric shaft sleeve device of honing grinding fluid pump |
Also Published As
Publication number | Publication date |
---|---|
JPS4946205A (en) | 1974-05-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: AMF CUNO INC., 400 RESEARCH PARKWAY, MERIDEN, CT. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMF INCORPRATED, A CORP. OF NJ;REEL/FRAME:004499/0451 Effective date: 19851111 |
|
AS | Assignment |
Owner name: SPECIALTY MATERIALS INC., 400 RESEARCH PARKWAY, ME Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMF CUNO INC., A CORP OF DE.;REEL/FRAME:004528/0383 Effective date: 19860124 |
|
AS | Assignment |
Owner name: CHEM-TECH INTERNATIONAL A CORP. OF DE,MASSACHUSET Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CUNO INC.,;REEL/FRAME:004705/0047 Effective date: 19860801 Owner name: CHEM-TECH INTERNATIONAL 92 BOLT ST., LOWELL, MA A Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CUNO INC.,;REEL/FRAME:004705/0047 Effective date: 19860801 |
|
AS | Assignment |
Owner name: HELLER FINANCIAL, INC., A DE CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CHEM TECH INTERNATIONAL, INC.;REEL/FRAME:004862/0569 Effective date: 19880224 |