USRE38239E1 - Air driven diaphragm pump - Google Patents
Air driven diaphragm pump Download PDFInfo
- Publication number
- USRE38239E1 USRE38239E1 US09/566,416 US56641600A USRE38239E US RE38239 E1 USRE38239 E1 US RE38239E1 US 56641600 A US56641600 A US 56641600A US RE38239 E USRE38239 E US RE38239E
- Authority
- US
- United States
- Prior art keywords
- chamber housing
- air chamber
- pump
- control rod
- outwardly facing
- 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
- F04B43/06—Pumps having fluid drive
- F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
- F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
Definitions
- the field of the present invention is control mechanisms for air driven diaphragm pumps.
- Such pumps include an air chamber housing having a center section and two concave discs facing outwardly from the center section. Opposing the two concave discs are pump chamber housings.
- the pump chamber housings are coupled with an inlet manifold and an outlet manifold through ball check valves positioned in the inlet passageways and outlet passageways from and to the inlet and outlet manifolds, respectively.
- Diaphragms extend outwardly to mating surfaces between the concave discs and the pump chamber housings.
- the diaphragms with the concave discs and with the pump chamber housings each define an air chamber and a pump chamber to either side thereof. At the centers thereof, the diaphragms are fixed to a control rod which slidably extends through the air chamber housing.
- actuator valves associated with such pumps have included feedback control mechanisms including a valve piston and airways on the control rod attached to the diaphragms. Air pressure is alternately generated in each air chamber according to control rod location, driving the diaphragms back and forth. In turn, the pump chambers alternately expand and contract to pump material therethrough.
- Such pumps are capable of pumping a wide variety of materials of widely varying consistency.
- the present invention is directed to an air driven double diaphragm pump employing an actuator valve which provides alternating pressure to the diaphragms independently of the stroke position of the pump.
- actuator valve which provides alternating pressure to the diaphragms independently of the stroke position of the pump.
- pistons act to limit the stroke of the double diaphragms to accomplish desired pumping characteristics.
- FIG. 1 is a front view of a pump of the present invention.
- FIG. 2 is a side view of a pump of the present invention.
- FIG. 3 is a cross-sectional elevation taken along the centerline of the pump.
- FIG. 4 is a cross-sectional view taken centrally through the pump center section and actuator valve.
- FIG. 5 is a plan view of an inner piston of the pump.
- an air driven double diaphragm pump is illustrated.
- the pump itself is found to be in three principal structural pieces, an air chamber housing 10 and two pump chamber housings 12 and 14 .
- Clamp bands 16 and 18 hold these components together.
- the air chamber housing 10 is shown to include two outwardly facing concave discs 20 and 22 which are integrally formed with a center section 24 .
- the discs 20 and 22 extend outwardly to a circular periphery having a form compatible with one of the clamp bands 16 and 18 .
- a circular recess 26 accommodates the periphery of a diaphragm.
- the center section 24 includes a bushing 28 .
- the bushing 28 includes artifacts of an air driven reciprocating control valve.
- a plain bushing with a single O-ring 30 would suffice. Additional O-rings and passages are illustrated which are unnecessary in this embodiment. Exhaust passages 32 and 34 vent air from the air chambers.
- control rod 36 Located in the bushing 28 is a control rod 36 .
- the control rod 36 is slidably arranged and need not include the central passage 38 for purposes of this embodiment.
- the center section 24 is shown to include supply passages 40 and 42 .
- the supply passage 40 extends through the concave disc 20 while the supply passage 42 extends through the concave disc 22 in the opposite direction.
- the two pump chamber housings 12 and 14 may be identical. Each housing 12 and 14 includes a pump chamber shell 44 defining a pump chamber 46 . Extending from the pump chamber shell 44 is an inlet passage 48 and an inlet check valve chamber 50 . The inlet passages, in association with a T-coupling, form an inlet manifold.
- a spacer 52 Contained within the inlet passage 48 and the inlet check valve chamber 50 is a spacer 52 threadably attached to one of the housings 12 and 14 with the junction sealed by an O-ring 54 .
- the spacer 52 positions a valve seat 56 with an O-ring 58 preventing bypass of the controlled passage.
- a ball valve 60 cooperates with the valve seat 56 to form a one-way valve.
- a stop 62 retains the ball valve 60 in position.
- outlet passage 64 Also extending from the pump chamber shell 44 is an outlet passage 64 and an outlet check valve chamber 66 .
- the outlet check valve chamber 66 includes a seat 68 .
- a ball valve 70 cooperates with the seat 68 to provide a one-way check valve.
- a stop 72 extends into the outlet check valve chamber 66 to retain position of the ball valve 70 .
- the stop 72 is threadably fixed within the outlet passage 64 and includes an O-ring 74 to insure proper sealing.
- the two pump chamber housings 12 and 14 also include a circular recess 76 to receive the periphery of the diaphragms.
- the outer portion of the pump chamber shell 44 is circular and adapted to cooperate with one of the clamp bands 16 and 18 .
- the diaphragms may be of conventional construction for air driven diaphragm pumps, defining with the concave discs 20 and 22 and the pump chamber shells 44 and air chamber and a pump chamber on either side of each diaphragm 78 and 80 .
- Each diaphragm 78 and 80 includes a center opening 82 for anchoring to the control rod 36 .
- the control rod 36 includes a threaded portion 84 at each end thereof. At each end, an inner piston 86 and an outer piston 88 cooperate to retain each of the diaphragms 78 and 80 .
- a nut 90 is threaded onto the control rod 36 at each end to retain the pistons 86 and 88 .
- the inner pistons 86 each include a stop surface 92 which is positioned to abut against the center section 24 to define the limits of the stroke of the control rod 36 .
- the inner pistons 86 may be available in varying thicknesses to accommodate different pump characteristics.
- an actuator valve 94 Associated with the air driven diaphragm pump is an actuator valve 94 .
- the actuator valve 94 operates independently of the stroke position of the control rod 36 .
- a solenoid 96 controls the valve 94 .
- Conventional electronic control may be employed to reciprocate the valve 94 through the solenoid 96 on a timed basis, on a pump flow basis, on a flow pressure basis or on external controls and circumstances.
- the actuator valve 94 is shown to include a piston 98 having a central land 100 and two circumferential passages 102 and 104 .
- a spring 106 biases the piston 98 in a first direction to cooperate with the solenoid 96 .
- Spacers 108 with O-rings 110 therebetween prevent communication axially along the valve.
- An inlet 112 receives a constant pressurized source of air.
- Supply passages 40 and 42 are alternately communicated with the inlet 112 depending on the position of the piston 98 .
- the supply passage of the supply passages 40 and 42 which is not in communication with the inlet 112 is in communication with its respective exhaust passage of the exhaust passages 32 and 34 .
- the pump is alternately driven in one direction or the other until it stalls against a stop surface 92 of one of the inner pistons 86 .
- the thickness of the inner pistons 86 may be selected to provide varying pump performance characteristics. For example, thick inner pistons 86 would act to minimize pressure surges. The thinner inner pistons 86 would maximize flow. Where each side is intended for a different pumping function, the inner pistons 86 may be of different thicknesses to accomplish different results. Finally, empirical selection of the thickness for each inner piston 86 would define a specific quantity of flow per stroke such that the pump itself may be used to accurately measure volumes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/566,416 USRE38239E1 (en) | 1993-02-16 | 2000-05-05 | Air driven diaphragm pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/017,822 US5378122A (en) | 1993-02-16 | 1993-02-16 | Air driven diaphragm pump |
US09/566,416 USRE38239E1 (en) | 1993-02-16 | 2000-05-05 | Air driven diaphragm pump |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/017,822 Reissue US5378122A (en) | 1993-02-16 | 1993-02-16 | Air driven diaphragm pump |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE38239E1 true USRE38239E1 (en) | 2003-08-26 |
Family
ID=21784729
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/017,822 Ceased US5378122A (en) | 1993-02-16 | 1993-02-16 | Air driven diaphragm pump |
US09/566,416 Expired - Lifetime USRE38239E1 (en) | 1993-02-16 | 2000-05-05 | Air driven diaphragm pump |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/017,822 Ceased US5378122A (en) | 1993-02-16 | 1993-02-16 | Air driven diaphragm pump |
Country Status (1)
Country | Link |
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US (2) | US5378122A (en) |
Cited By (20)
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WO2005108834A1 (en) | 2004-05-04 | 2005-11-17 | Wilden Pump And Engineering Llc | One-way valve |
US20060082950A1 (en) * | 2004-10-18 | 2006-04-20 | Wilden Pump And Engineering Llc | Air valve for an air driven reciprocating device |
US20060104829A1 (en) * | 2004-11-17 | 2006-05-18 | Reed David A | Control system for an air operated diaphragm pump |
US7125229B2 (en) | 2004-05-10 | 2006-10-24 | Wilden Pump And Engineering Llc | Reciprocating air distribution system |
US7168928B1 (en) | 2004-02-17 | 2007-01-30 | Wilden Pump And Engineering Llc | Air driven hydraulic pump |
US20070092386A1 (en) * | 2005-10-24 | 2007-04-26 | Reed David A | Method and control system for a pump |
US20070248474A1 (en) * | 2006-04-19 | 2007-10-25 | Wilden Pump And Engineering Llc | Air driven pump with performance control |
US20070258837A1 (en) * | 2004-09-10 | 2007-11-08 | Katsuya Okumura | Pump Unit for Supplying Chemical Liquids |
US20080099084A1 (en) * | 2006-11-01 | 2008-05-01 | Headley Thomas R | Check valve having integrally formed seat and seal body |
US7399168B1 (en) * | 2005-12-19 | 2008-07-15 | Wilden Pump And Engineering Llc | Air driven diaphragm pump |
US20090202361A1 (en) * | 2004-11-17 | 2009-08-13 | Proportion, Inc. | Control system for an air operated diaphragm pump |
US20100089456A1 (en) * | 2008-10-14 | 2010-04-15 | Circor Instrumentation Technologies, Inc. | Method and apparatus for low powered and/or high pressure flow control |
US20100189577A1 (en) * | 2009-01-23 | 2010-07-29 | Idex Aodd, Inc. | Method for Increasing Compressed Air Efficiency In a Pump |
US20100284834A1 (en) * | 2009-05-08 | 2010-11-11 | Idex Aodd, Inc. | Air Operated Diaphragm Pump With Electric Generator |
US20110142692A1 (en) * | 2009-12-16 | 2011-06-16 | Idex Aodd, Inc. | Air Logic Controller |
USD782541S1 (en) * | 2015-10-06 | 2017-03-28 | Graco Minnesota Inc. | Diaphragm pump |
USD822067S1 (en) * | 2017-06-01 | 2018-07-03 | Graco Minnesota Inc. | Diaphragm pump |
USD822719S1 (en) * | 2017-06-01 | 2018-07-10 | Graco Minnesota Inc. | Diaphragm pump |
USD822720S1 (en) * | 2017-06-01 | 2018-07-10 | Graco Minnesota Inc. | Diaphragm pump |
US10077763B2 (en) | 2015-03-25 | 2018-09-18 | Wilden Pump And Engineering Llc | Air operated pump |
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US5709536A (en) * | 1995-01-30 | 1998-01-20 | Titan Tool, Inc. | Hydro mechanical packingless pump and liquid spray system |
JP3816988B2 (en) * | 1996-08-12 | 2006-08-30 | Smc株式会社 | Process pump |
US5957670A (en) * | 1997-08-26 | 1999-09-28 | Wilden Pump & Engineering Co. | Air driven diaphragm pump |
JP3083275B2 (en) * | 1997-09-18 | 2000-09-04 | 株式会社ワイ・テイ・エス | Double diaphragm pump |
US6254556B1 (en) | 1998-03-12 | 2001-07-03 | Craig N. Hansen | Repetitive pressure pulse jacket |
US5894784A (en) * | 1998-08-10 | 1999-04-20 | Ingersoll-Rand Company | Backup washers for diaphragms and diaphragm pump incorporating same |
US6168394B1 (en) * | 1999-06-18 | 2001-01-02 | Wilden Pump & Engineering Co. | Air driven double diaphragm pump |
US6168387B1 (en) | 1999-10-28 | 2001-01-02 | Ingersoll-Rand Company | Reciprocating pump with linear displacement sensor |
US6280149B1 (en) | 1999-10-28 | 2001-08-28 | Ingersoll-Rand Company | Active feedback apparatus and air driven diaphragm pumps incorporating same |
US7527483B1 (en) * | 2004-11-18 | 2009-05-05 | Carl J Glauber | Expansible chamber pneumatic system |
US8460223B2 (en) * | 2006-03-15 | 2013-06-11 | Hill-Rom Services Pte. Ltd. | High frequency chest wall oscillation system |
JP5739340B2 (en) | 2008-10-22 | 2015-06-24 | グラコ ミネソタ インコーポレーテッド | Portable airless sprayer |
WO2010069320A2 (en) | 2008-12-19 | 2010-06-24 | Stobbe Tech A/S | Biopharmaceutical plant in a column |
CN102410182B (en) * | 2011-11-28 | 2014-03-19 | 陈昌金 | Controllable pneumatic double diaphragm pump |
CN103047128B (en) * | 2013-01-08 | 2015-07-01 | 曹雷钢 | Reversing valve for pneumatic diaphragm pump |
US9976545B2 (en) | 2014-01-31 | 2018-05-22 | Wilden Pump And Engineering Llc | Air operated pump |
US10161393B2 (en) * | 2014-02-07 | 2018-12-25 | Graco Minnesota Inc. | Mechanical drive system for a pulseless positive displacement pump |
US11007545B2 (en) | 2017-01-15 | 2021-05-18 | Graco Minnesota Inc. | Handheld airless paint sprayer repair |
US11022106B2 (en) | 2018-01-09 | 2021-06-01 | Graco Minnesota Inc. | High-pressure positive displacement plunger pump |
US11986850B2 (en) | 2018-04-10 | 2024-05-21 | Graco Minnesota Inc. | Handheld airless sprayer for paints and other coatings |
CN115739435A (en) | 2019-05-31 | 2023-03-07 | 固瑞克明尼苏达有限公司 | Hand-held fluid sprayer |
AU2021246059A1 (en) | 2020-03-31 | 2022-10-06 | Graco Minnesota Inc. | Electrically operated displacement pump |
US10968903B1 (en) | 2020-06-04 | 2021-04-06 | Graco Minnesota Inc. | Handheld sanitary fluid sprayer having resilient polymer pump cylinder |
US10926275B1 (en) | 2020-06-25 | 2021-02-23 | Graco Minnesota Inc. | Electrostatic handheld sprayer |
Citations (39)
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US1920014A (en) | 1931-06-26 | 1933-07-25 | Trico Products Corp | Multiple diaphragm pump |
US2307566A (en) | 1940-07-31 | 1943-01-05 | Wright Aeronautical Corp | Pneumatic drive fuel pump |
US2383193A (en) | 1943-11-01 | 1945-08-21 | Oliver United Felters Inc | Diaphragm pump |
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-
1993
- 1993-02-16 US US08/017,822 patent/US5378122A/en not_active Ceased
-
2000
- 2000-05-05 US US09/566,416 patent/USRE38239E1/en not_active Expired - Lifetime
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Ingersoll-Rand Fluid Products catalog of ARO Pneumatic Valves and Logic Controls, dated 5/98. |
Instruction manual for Iwaki Pneumatic-driven Bellow Pump FF-H Series, dated Dec. 1, 1993. |
LMI-Liquid Metronics Division of the Milton Roy Co. Catalog of Metering Pumps (undated). |
LMI—Liquid Metronics Division of the Milton Roy Co. Catalog of Metering Pumps (undated). |
Operating Instructions for an Electronic Metering Pump. |
Publication entitled Machine Design, 1981, pp. 40-53. |
Publication entitled The How of Pneumatic Logic Control published by Clippard Instrument Laboratory, Inc. (undated). |
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