CN101666308B - Reciprocating rubber diaphragm hydraulic pump - Google Patents
Reciprocating rubber diaphragm hydraulic pump Download PDFInfo
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- CN101666308B CN101666308B CN2009101827627A CN200910182762A CN101666308B CN 101666308 B CN101666308 B CN 101666308B CN 2009101827627 A CN2009101827627 A CN 2009101827627A CN 200910182762 A CN200910182762 A CN 200910182762A CN 101666308 B CN101666308 B CN 101666308B
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Abstract
The invention relates to a reciprocating rubber diaphragm hydraulic pump which comprises a motor, a pump body, an eccentric shaft, a bearing, a connecting rod, a rubber diaphragm, an inner pressure plate, a one-way diaphragm plate and an outer pressure plate, wherein the motor is fixed to the side wall of the pump body, the output shaft of the motor is linked with the eccentric shaft with the same axial center, the bearing is assembled on the pump body, both ends of the eccentric shaft are arranged in the bearing, and an eccentric wheel is arranged in the middle of the eccentric shaft; the upper end of the connecting rod is hinged on the eccentric wheel of the eccentric shaft, and the rubber diaphragm is arranged on the lower end surface of the connecting rod; the inner pressure plate is arranged at the lower part of the pump body, the outer pressure plate is arranged at the lower part of the inner pressure plate, and the one-way diaphragm plate is arranged between the inner pressure plate and the outer pressure plate which are fixedly arranged on the lower end surface of the pump body. The invention has the advantages of simple and reasonable structure, convenience in manufacturing and assembly, light weight, low cost and low pressure fluctuation of output liquid, and the invention can meet requirements for small liquid flow.
Description
Technical field
The present invention relates to a kind of diaphragm hydraulic pump, specifically is a kind of reciprocating rubber diaphragm hydraulic pump.
Background technique
Diaphragm hydraulic pump is a kind of pump that is used to produce certain pressure and certain flow, and existing diaphragm hydraulic pump is electronic diaphragm hydraulic pump mostly, and it drives one in front and one in back to-and-fro motion of barrier film on the plunger with motor by speed reducer.In pump chamber, two non-return valves up and down are housed, the motion of barrier film causes the change of the volume in the active chamber, forces two alternately opening and closing of non-return valve, thereby liquid is constantly sucked and exports.The diaphragm hydraulic pump of this structure since two non-return valves to replace opening and closing speed slower, cause the fluid pressure fluctuation of discharge bigger.In order to adapt to the speed of response that two non-return valves replace opening and closing, need between motor and the barrier film retarder is installed simultaneously, so system architecture is complicated, own wt is heavier, cost is higher.And the diaphragm hydraulic pump of this structure is not suitable for the occasion of small flow.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of simple and reasonable, make easy to assembly, own wt is light, cost is lower, the fluctuation of the fluid pressure of output is less, can satisfy the reciprocating rubber diaphragm hydraulic pump that small flow requires.
According to technological scheme provided by the invention, described reciprocating rubber diaphragm hydraulic pump comprises motor, the pump housing, eccentric shaft, bearing, connecting rod, diaphragm of rubber, inner clip plate, unidirectional diaphragm and outer plate;
Described motor is fixed on the pump housing sidewall, and motor output shaft connects with the eccentric shaft concentric;
Described bearing is assemblied on the pump housing, and the eccentric shaft two ends are contained in the bearing, and the eccentric shaft middle part convexes with eccentric wheel;
Described small end is hinged on the eccentric wheel of eccentric shaft, and connecting rod is installed diaphragm of rubber on the lower end surface;
Inner clip plate is installed in described pump housing bottom, inner clip plate is pressed on the pump housing lower end surface around the edge with diaphragm of rubber, form cavity between diaphragm of rubber lower surface and the inner clip plate upper surface, liquid-inlet and interior liquid outlet in having on the inner clip plate, the inner clip plate lower surface is concaved with a rectangular inner groovy, positive stop lug boss and inner hollow cylinder boss in being provided with in the inner groovy, interior positive stop lug boss is in interior liquid-inlet one side, the inner hollow cylinder boss is positioned on the liquid outlet, and interior liquid outlet passes through from the axle center of inner hollow cylinder boss;
Outer plate is installed in described inner clip plate bottom, and unidirectional diaphragm is installed between inner clip plate and the outer plate, and unidirectional diaphragm is divided into import diaphragm and outlet diaphragm two-part, and the both sides of import diaphragm and outlet diaphragm are respectively equipped with hollow out;
Have outer liquid-inlet and outer liquid outlet on the described outer plate, the outer plate upper surface is concaved with a rectangular outer groove, be provided with outer positive stop lug boss and outer hollow cylinder boss in the outer groove, outer positive stop lug boss is liquid outlet one side outside, the outer hollow cylinder boss is positioned on the outer liquid-inlet, and outer liquid-inlet passes through from the axle center of outer hollow cylinder boss;
Described inner clip plate, outer plate are fixedly mounted on the lower end surface of the pump housing.
Described pump housing top is provided with two bearing bracket, and bearing is assemblied in the bearing bracket; The side of the pump housing is provided with screwing through hole, is used to install motor; Pump housing lower end surface is provided with screw hole and circular seal groove, and screw hole is used to connect inner clip plate and outer plate, and the circular seal groove is used to compress the sealing surface top of caulking gum diaphragm edge.
Described eccentric shaft end is provided with a connection slot, is used for being connected with motor output shaft.
Described small end is provided with a circular hole, is used to be sleeved on the eccentric wheel of eccentric shaft; Connecting rod offers tapped hole on the lower end surface, and tapped hole is equipped with screw rod, and screw rod is used for the connection diaphragm of rubber.
As a further improvement on the present invention, described diaphragm of rubber upper end is the plane, plane central authorities setting-in screw rod; The diaphragm of rubber lower end is a spherical cambered surface, is sealing surface around the diaphragm of rubber edge.
As a further improvement on the present invention, described inner clip plate upper surface is concaved with a spherical cambered surface, for compressing seal groove, compresses the sealing surface bottom that seal groove is used to compress the caulking gum diaphragm edge around the spherical cambered surface.
As a further improvement on the present invention, there is interior seal groove around the inner groovy edge of inner clip plate lower surface and centre, there is the external sealed groove around the outer recess edge of outer plate upper surface and centre, and around the edge of the upper and lower surface of unidirectional diaphragm and centre is provided with seal boss; The one-way membrane sheet is contained between inner clip plate and the outer plate, and seal boss is assemblied in respectively in interior seal groove and the external sealed groove.
As a further improvement on the present invention, the described pump housing and connecting rod adopt aluminium to make; Described eccentric shaft adopts stainless steel material to make; Described inner clip plate and outer plate adopt nylon material to make; Described diaphragm of rubber and unidirectional diaphragm adopt rubber material to make.
As a further improvement on the present invention, between described eccentric wheel and the small end circular hole copper sheathing is housed; Suit setting sleeve between bearings at both ends and the eccentric wheel on the eccentric shaft.
As a further improvement on the present invention, import diaphragm on the described unidirectional diaphragm and outlet diaphragm are circular or square.
The present invention is simple and reasonable, manufacturing and easy to assembly, compared with prior art, adopted the structural type of unidirectional diaphragm, because unidirectional diaphragm is light and sealability is better, alternately the opening and closing response is fast, but the high frequency output liquid, pressure surge is less, and greatly reduces own wt, replace the opening and closing time by controlling unidirectional diaphragm, effectively the output flow of control pump.
Description of drawings
Fig. 1 is a whole assembling situation schematic representation of the present invention.
Fig. 2 is the main sectional view of middle pump body of the present invention.
Fig. 3 is the worm's eye view of Fig. 2 middle pump body.
Fig. 4 is the main sectional view of connecting rod among the present invention.
Fig. 5 is the side view of connecting rod among Fig. 4.
Fig. 6 is the main sectional view of diaphragm of rubber among the present invention.
Fig. 7 is the plan view of Fig. 6.
Fig. 8 is the main sectional view of inner clip plate among the present invention.
Fig. 9 is the worm's eye view of inner clip plate among Fig. 8.
Figure 10 is the plan view of inner clip plate among Fig. 8.
Figure 11 is the main sectional view of outer plate among the present invention.
Figure 12 is the worm's eye view of outer plate among Figure 11.
Figure 13 is the plan view of outer plate among Figure 11.
Figure 14 is the main sectional view of unidirectional diaphragm among the present invention.
Figure 15 is the plan view of unidirectional diaphragm among Figure 14.
Description of reference numerals: 1-motor, the 2-pump housing, the 3-motor output shaft, the 4-eccentric shaft, the 5-bearing, the 6-connecting rod, the 7-diaphragm of rubber, the 8-inner clip plate, the unidirectional diaphragm of 9-, the 10-outer plate, the 11-cavity, the 12-screw rod, the 13-copper sheathing, the 14-eccentric wheel, the 15-setting sleeve, the 16-connection slot, the 17-screwing through hole, the 18-bearing bracket, 19-circular seal groove, the 20-screw hole, the 21-circular hole, the 22-tapped hole, the 23-sealing surface, 24-compresses seal groove, seal groove in the 25-, 26-inner hollow cylinder boss, liquid outlet in the 27-, liquid-inlet in the 28-, positive stop lug boss in the 29-, the 30-inner groovy, the outer liquid-inlet of 31-, the outer liquid outlet of 32-, 33-external sealed groove, the outer positive stop lug boss of 34-, 35-outer hollow cylinder boss, the outer groove of 36-, the 37-seal boss, 38-import diaphragm, 39-exports diaphragm, the 40-hollow out.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in Figure 1, the present invention is mainly assembled by motor 1, the pump housing 2, eccentric shaft 4, bearing 5, connecting rod 6, diaphragm of rubber 7, inner clip plate 8, unidirectional diaphragm 9, outer plate 10, screw rod 12, copper sheathing 13 and setting sleeve 15.
As shown in Figure 1, on the pump housing 2 sidewalls, motor output shaft 3 connects with eccentric shaft 4 concentrics motor 1 by screw; Bearing 5 is assemblied on the pump housing 2, and eccentric shaft 4 two ends are contained in the bearing 5, and eccentric shaft 4 middle parts convex with eccentric wheel 14, and suit setting sleeve 15 between bearings at both ends 5 and the eccentric wheel 14 on the eccentric shaft 4 slides to prevent eccentric shaft 4; Connecting rod 6 upper ends are hinged on the eccentric wheel 14 of eccentric shaft 4, and eccentric shaft 4 can freely rotate; By screw rod 12 diaphragm of rubber 7 is installed on connecting rod 6 lower end surfaces; Inner clip plate 8 is installed in the described pump housing 2 bottoms, and inner clip plate 8 is pressed on the pump housing 2 lower end surface around the edge with diaphragm of rubber 7, forms cavity 11 between diaphragm of rubber 7 lower surfaces and inner clip plate 8 upper surfaces; Outer plate 10 is installed in inner clip plate 8 bottoms, and unidirectional diaphragm 9 is installed between inner clip plate 8 and the outer plate 10; Inner clip plate 8, outer plate 10 respectively by screw on the pump housing 2 lower end surface.
The described pump housing 2 adopts aluminium to make, its structure such as Fig. 2, shown in Figure 3, and the pump housing 2 tops are provided with two bearing bracket 18, and bearing 5 is assemblied in the bearing bracket 18; The side of the pump housing 2 is provided with four screwing through hole 17, is used to install motor 1; The pump housing 2 lower end surface have four screw holes 20 and 19, four screw holes 20 of a circular seal groove to be used to connect inner clip plate 8 and outer plate 10, and circular seal groove 19 is used to compress sealing surface 23 tops at caulking gum barrier film 7 edges.
Described eccentric shaft 4 adopts stainless steel materials to make, its structure as shown in Figure 1, eccentric shaft 4 middle parts are provided with eccentric wheel 14, are used to assemble connecting rod; Eccentric shaft 4 ends are provided with a connection slot 16, are used for being connected with motor output shaft 3.
Described connecting rod 6 adopts aluminium to make, its structure such as Fig. 4, shown in Figure 5, and connecting rod 6 upper ends are provided with a circular hole 21, are used to be sleeved on the eccentric wheel 14 of eccentric shaft 4, between described eccentric wheel 14 and the connecting rod 6 upper end circular holes 21 copper sheathing 13 are housed, and rotate flexibility to improve; Connecting rod offers tapped hole 22 on 6 lower end surfaces, and screw rod 12 is housed in the tapped hole 22, and screw rod 12 is used for connection diaphragm of rubber 7.
Described diaphragm of rubber 7 adopts rubber material to make, its structure such as Fig. 6, shown in Figure 7, and the upper end of diaphragm of rubber 7 is planes, plane central authorities setting-in screw rod 12; Diaphragm of rubber 7 lower ends are spherical cambered surfaces, are sealing surfaces 23 around diaphragm of rubber 7 edges.
Described inner clip plate 8 adopts nylon material to make, its structure such as Fig. 8～shown in Figure 10, liquid-inlet 28 and interior liquid outlet 27 in having on the inner clip plate 8, inner clip plate 8 upper surfaces are concaved with a spherical cambered surface, spherical cambered surface is all around for compressing seal groove 24, compress sealing surface 23 bottoms that seal groove 24 is used to compress caulking gum barrier film 7 edges, improve sealing; Inner clip plate 8 lower surfaces are concaved with a rectangular inner groovy 30, there is interior seal groove 25 around inner groovy 30 edges and centre, positive stop lug boss 29 and inner hollow cylinder boss 26 in being provided with in the inner groovy 30, interior positive stop lug boss 29 is in interior liquid-inlet 28 1 sides, inner hollow cylinder boss 26 is positioned on the liquid outlet 27, and interior liquid outlet 27 passes through from the axle center of inner hollow cylinder boss 26.
Described outer plate 10 adopts nylon material to make, its structure such as Figure 11～shown in Figure 13, outer plate 10 has outer liquid-inlet 31 and outer liquid outlet 32, outer plate 10 upper surfaces are concaved with a rectangular outer groove 36, there is external sealed groove 33 around outer groove 36 edges and centre, be provided with outer positive stop lug boss 34 and outer hollow cylinder boss 35 in the outer groove 36, outer positive stop lug boss 34 is liquid outlet 32 1 sides outside, outer hollow cylinder boss 35 is positioned on the outer liquid-inlet 31, and outer liquid-inlet 31 passes through from the axle center of outer hollow cylinder boss 35.
Described unidirectional diaphragm 9 adopts rubber material to make, its structure such as Figure 14, shown in Figure 15, around unidirectional diaphragm 9 edges and centre is provided with seal boss 37, and unidirectional diaphragm 9 is contained between inner clip plate 8 and the outer plate 10, and seal boss 37 is assemblied in respectively in interior seal groove 25 and the external sealed groove 33; Unidirectional diaphragm 9 is divided into import diaphragm 38 and outlet diaphragm 39 two-part, and the both sides of import diaphragm 38 and outlet diaphragm 39 are respectively equipped with arc hollow out 40.
When the present invention works, motor 1 energising running, motor output shaft 3 drives the eccentric shaft 4 that connects with it and rotates, and the connecting rod 6 that is hinged on the eccentric shaft 4 moves up and down, and drive diaphragm of rubber 7 moves up and down.When diaphragm of rubber 7 moves from lower to upper, the volume of the cavity 11 that the spherical cambered surface of diaphragm of rubber 7 spherical cambered surfaces and inner clip plate 8 upper surfaces forms increases gradually, form negative pressure in the cavity 11, the import diaphragm 38 of unidirectional diaphragm 9 is attracted on the interior positive stop lug boss 29 of inner clip plate 8 lower surfaces, the outlet diaphragm 39 of unidirectional diaphragm 9 is tightly inhaled on the inner hollow cylinder boss 26 of inner clip plate 8 lower surfaces, outer liquid-inlet 31 on the outer plate 10 is opened, and the interior liquid outlet 27 on the inner clip plate 8 is blocked sealing by outlet diaphragm 39.At this moment, the hollow out 40 of outer liquid-inlet 31, import diaphragm 38 both sides and interior liquid-inlet 29 form an inlet passage, and liquid is sucked in the cavity 11 by this passage.
When diaphragm of rubber 7 moves from top to bottom, the volume of the cavity 11 that the spherical cambered surface of diaphragm of rubber 7 spherical cambered surfaces and inner clip plate 8 upper surfaces forms reduces gradually, liquid in the cavity 11 forms malleation, the import diaphragm 38 of unidirectional diaphragm 9 is tightly pressed on the outer hollow cylinder boss 35 of outer plate 10 upper surfaces, outlet diaphragm 39 is pressed towards on the outer positive stop lug boss 34 of outer plate 10 upper surfaces, outer liquid-inlet 31 passages on the outer plate 10 are blocked sealing by import diaphragm 38, and the interior liquid outlet 27 of inner clip plate 8 is opened.At this moment, the both sides hollow out 40 and the interior liquid outlet 27 of outer liquid outlet 32, outlet diaphragm 39 form an outlet passage, and the liquid in the cavity 11 is forced out by this outlet passage.
Claims (10)
1. reciprocating rubber diaphragm hydraulic pump comprises motor (1), the pump housing (2), eccentric shaft (4), bearing (5), connecting rod (6), diaphragm of rubber (7), inner clip plate (8), unidirectional diaphragm (9) and outer plate (10); It is characterized in that:
Described motor (1) is fixed on the sidewall of the pump housing (2), and motor output shaft (3) connects with eccentric shaft (4) concentric;
Described bearing (5) is assemblied on the pump housing (2), and the two ends of eccentric shaft (4) are contained in the bearing (5), and the middle part of eccentric shaft (4) is provided with eccentric wheel (14);
The upper end of described connecting rod (6) is hinged on the eccentric wheel (14) of eccentric shaft (4), and diaphragm of rubber (7) is installed on the lower end surface of connecting rod (6);
Inner clip plate (8) is installed in the bottom of the described pump housing (2), inner clip plate (8) is pressed on the lower end surface of the pump housing (2) around the edge with diaphragm of rubber (7), form cavity (11) between the upper surface of the lower surface of diaphragm of rubber (7) and inner clip plate (8), have interior liquid-inlet (28) and interior liquid outlet (27) on the inner clip plate (8), the lower surface of inner clip plate (8) is concaved with a rectangular inner groovy (30), be provided with interior positive stop lug boss (29) and inner hollow cylinder boss (26) in the inner groovy (30), interior positive stop lug boss (29) is in a side of interior liquid-inlet (28), inner hollow cylinder boss (26) is positioned on the liquid outlet (27), and interior liquid outlet (27) passes through from the axle center of inner hollow cylinder boss (26);
Outer plate (10) is installed in the bottom of described inner clip plate (8), unidirectional diaphragm (9) is installed between inner clip plate (8) and the outer plate (10), unidirectional diaphragm (9) is divided into import diaphragm (38) and outlet diaphragm (39) two-part, and the both sides of import diaphragm (38) and outlet diaphragm (39) are respectively equipped with hollow out (40);
Have outer liquid-inlet (31) and outer liquid outlet (32) on the described outer plate (10), the upper surface of outer plate (10) is concaved with a rectangular outer groove (36), be provided with outer positive stop lug boss (34) and outer hollow cylinder boss (35) in the outer groove (36), outer positive stop lug boss (34) is a side of liquid outlet (32) outside, outer hollow cylinder boss (35) is positioned on the outer liquid-inlet (31), and outer liquid-inlet (31) passes through from the axle center of outer hollow cylinder boss (35);
Described inner clip plate (8), outer plate (10) are fixedly mounted on the lower end surface of the pump housing (2).
2. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: the described pump housing (2) top is provided with two bearing bracket (18), and bearing (5) is assemblied in the bearing bracket (18); The side of the pump housing (2) is provided with screwing through hole (17), is used to install motor (1); The pump housing (2) lower end surface is provided with screw hole (20) and circular seal groove (19), and screw hole (20) is used to connect inner clip plate (8) and outer plate (10), and circular seal groove (19) is used to compress sealing surface (23) top at caulking gum barrier film (7) edge.
3. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: described eccentric shaft (4) end is provided with a connection slot (16), is used for being connected with motor output shaft (3).
4. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: described connecting rod (6) upper end is provided with a circular hole (21), is used to be sleeved on the eccentric wheel (14) of eccentric shaft (4); Connecting rod (6) offers tapped hole (22) on the lower end surface, and tapped hole (22) is equipped with screw rod (12), and screw rod (12) is used for connection diaphragm of rubber (7).
5. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: described diaphragm of rubber (7) upper end is the plane, plane central authorities setting-in screw rod (12); Diaphragm of rubber (7) lower end is a spherical cambered surface, is sealing surface (23) around diaphragm of rubber (7) edge.
6. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: the upper surface of described inner clip plate (8) is concaved with a spherical cambered surface, for compressing seal groove (24), compress sealing surface (23) bottom that seal groove (24) is used to compress caulking gum barrier film (7) edge around the spherical cambered surface.
7. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: there is interior seal groove (25) around inner groovy (30) edge of inner clip plate (8) lower surface and centre, there is external sealed groove (33) around outer groove (36) edge of outer plate (10) upper surface and centre, and around the edge of the upper and lower surface of unidirectional diaphragm (9) and centre is provided with seal boss (37); Unidirectional diaphragm (9) is contained between inner clip plate (8) and the outer plate (10), and seal boss (37) is assemblied in respectively in interior seal groove (25) and the external sealed groove (33).
8. reciprocating rubber diaphragm hydraulic pump according to claim 1, its feature also is: the described pump housing (2) and connecting rod (6) adopt aluminium to make; Described eccentric shaft (4) adopts stainless steel material to make; Described inner clip plate (8) and outer plate (10) adopt nylon material to make; Described diaphragm of rubber (7) and unidirectional diaphragm (9) adopt rubber material to make.
9. reciprocating rubber diaphragm hydraulic pump according to claim 1 and 2, its feature also is: between described eccentric wheel (14) and connecting rod (6) the upper end circular hole (21) copper sheathing (13) is housed; Eccentric shaft (4) is gone up suit setting sleeve (15) between bearings at both ends (5) and the eccentric wheel (14).
10. reciprocating rubber diaphragm hydraulic pump according to claim 1 and 2, its feature also is: import diaphragm (38) on the described unidirectional diaphragm (9) and outlet diaphragm (39) are for circular or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101827627A CN101666308B (en) | 2009-09-07 | 2009-09-07 | Reciprocating rubber diaphragm hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101827627A CN101666308B (en) | 2009-09-07 | 2009-09-07 | Reciprocating rubber diaphragm hydraulic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101666308A CN101666308A (en) | 2010-03-10 |
| CN101666308B true CN101666308B (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101827627A Active CN101666308B (en) | 2009-09-07 | 2009-09-07 | Reciprocating rubber diaphragm hydraulic pump |
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| Country | Link |
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| CN (1) | CN101666308B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486257A (en) * | 2012-11-02 | 2019-11-22 | 博世汽车柴油系统有限公司 | Diaphragm pump |
| WO2014076609A1 (en) | 2012-11-14 | 2014-05-22 | Koninklijke Philips N.V. | A fluid pump |
| CN105386966A (en) * | 2015-12-16 | 2016-03-09 | 武汉工程大学 | Micro diaphragm pump |
| CN109538451B (en) * | 2019-01-14 | 2024-03-26 | 沈阳远大压缩机有限公司 | Hydraulic guide type sealing membrane head of ultrahigh pressure diaphragm compressor |
| CN114183329A (en) * | 2021-09-07 | 2022-03-15 | 深圳华星恒泰泵阀有限公司 | Compact diaphragm water pump |
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| US5145336A (en) * | 1990-03-13 | 1992-09-08 | Knf Neuberger Gmbh | Diaphragm pump with reinforced diaphragm |
| DE4119228A1 (en) * | 1991-06-14 | 1992-12-17 | Knf Neuberger Gmbh | Diaphragm oscillating reciprocating pump - has flexible support at back of diaphragm |
| US5554014A (en) * | 1993-08-25 | 1996-09-10 | Knf Neuberger Gmbh | Diaphragm pump with at least two diaphragms |
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| CN2558782Y (en) * | 2002-05-21 | 2003-07-02 | 梁丽嫦 | Piston type small air pump |
| CN201060011Y (en) * | 2007-06-08 | 2008-05-14 | 罗献尧 | Mechanism diaphragm metering pump |
| CN101235813A (en) * | 2007-01-31 | 2008-08-06 | 加德纳·丹佛·托马斯股份有限公司 | Positive displacement pump for transporting a fluid with automatic adaptation to the compressibility of the fluid |
| CN101356371A (en) * | 2005-11-14 | 2009-01-28 | 约翰·斯坦伯格 | Membrane pump |
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2009
- 2009-09-07 CN CN2009101827627A patent/CN101666308B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5145336A (en) * | 1990-03-13 | 1992-09-08 | Knf Neuberger Gmbh | Diaphragm pump with reinforced diaphragm |
| DE4119228A1 (en) * | 1991-06-14 | 1992-12-17 | Knf Neuberger Gmbh | Diaphragm oscillating reciprocating pump - has flexible support at back of diaphragm |
| US5554014A (en) * | 1993-08-25 | 1996-09-10 | Knf Neuberger Gmbh | Diaphragm pump with at least two diaphragms |
| CN2294343Y (en) * | 1996-07-10 | 1998-10-14 | 玛克·曼塞尔 | Diaphragm pump |
| CN2491620Y (en) * | 2001-07-31 | 2002-05-15 | 李雄 | Efficiency metering diaphragm pump |
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| CN101356371A (en) * | 2005-11-14 | 2009-01-28 | 约翰·斯坦伯格 | Membrane pump |
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| CN101666308A (en) | 2010-03-10 |
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