CN202226189U - Piston component and hydraulic pump using elastic piston - Google Patents
Piston component and hydraulic pump using elastic piston Download PDFInfo
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- CN202226189U CN202226189U CN2011203367067U CN201120336706U CN202226189U CN 202226189 U CN202226189 U CN 202226189U CN 2011203367067 U CN2011203367067 U CN 2011203367067U CN 201120336706 U CN201120336706 U CN 201120336706U CN 202226189 U CN202226189 U CN 202226189U
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Abstract
The utility model provides a hydraulic pump using an elastic piston, which is provided with a piston component. The piston component comprises a piston rod, a piston head, a piston joint and a piston, wherein the piston joint is positioned between the piston rod and the piston head in a necking manner, and the piston made of elastic materials is sleeved onto the piston joint between the piston rod and the piston head. The piston rod and the piston head are separately provided and mounted together, and the piston joint is formed by piston joint forming portions on at least one of the piston rod and the piston head. In addition, the utility model further provides the piston component for the hydraulic pump, and an annular notch is peripherally formed at the upper end, with an annular internal flange, of the piston. By the aid of the piston component and the hydraulic pump using the elastic piston, precision and quality of products can be improved, automatic assembly is facilitated, and the piston component is specially applied to hydraulic pumps using the elastic piston.
Description
Technical field
The utility model relates to liquid pump field, more particularly relates to a kind of liquid pump that uses the elastic body piston.
Background technology
The liquid pump generally is mounted in the opening part of container, is used for through user's manual pressing operation the oily liquids in the container being pumped container for use.What this liquid pump usually adopted is the piston that non-plastic material is processed by elastomeric material (such as nitrile rubber), because elastomeric material does not resemble and is subject to the influence of oily liquids the plastic material and produces distortion.
At present, the liquid pump of the employing elastic body piston of many above-mentioned types has been arranged on the market, be specifically designed to pumping oily liquid product.The traditional liquid pump of this type exists mostly to be made the assembling difficulty, is difficult to promote problem such as product precision.
JP2004-131163 has just disclosed a kind of liquid pump of the above-mentioned type.Shown in Fig. 1 a-1e, this liquid pump mainly comprises pressure head 120, cylinder 130, integral type facing-cylinder cover 140, spring 150, following unidirectional ball valve 160 and piston component 110.This liquid pump is installed on the peristome (the normally top of the opening of container) of containers for liquid products through integral type facing-cylinder cover 140, is used for the liquid product in the container is assigned to the outside of container.In known manner, piston component 110 pumps under the drive of pressure head 120 in cylinder 130, thereby realizes required pump function.Piston component 110 comprise integrally formed piston rod that extends longitudinally 111 and piston head 112 and be set in piston rod 111 and piston head 112 between piston junction surface 115 on piston 113.Piston junction surface 115 is configured to the cylindrical constriction part between piston rod 111 and the piston head 112, and its columniform exterior contour matees with the cylindrical interior profile phase of the piston 113 that is set in its outside.Center at integrally formed piston rod 111 and piston head 112 is formed with fluid passage 114, and the lower end closed of this fluid passage 114 is in piston head 112 places, and the upper end is at the top end opening of piston rod 111.Be formed with the interconnection 116 that is substantially transverse to fluid passage 114 and radially runs through 115 extensions of piston junction surface and be communicated with this fluid passage 114 at 115 places, piston junction surface; This interconnection can be thought an extension of fluid passage 114, thereby makes the liquid in the reservoir of cylinder 130 be assigned to external container through fluid passage 114 with as the interconnection 116 of its extension.Piston rod 111 has the 115 tapered type conical bench faces 1111 towards the piston junction surface in the junction with piston junction surface 115, and piston head 112 is basically perpendicular to steep longitudinally step surface 1121 having with 115 junctions, piston junction surface.Piston 113 is cylindrical cannula-like substantially, and its sidewall is formed with an annular inward flange 1131, and this annular inward flange limits a central circular through hole, supplies the piston junction surface 115 of piston rod 111 and piston head 112 to pass and basically around this piston junction surface 115.Two relative ora terminalis of piston 113 expand outwardly respectively gradually, thereby form lower seal edge 1132 and back seal edge 1133.
Under the static confined state of liquid pump; Piston component 110 is slidably received within the cylinder 130; Its annular inward flange 1131 that is set in the piston 113 on the piston junction surface 115 is sealed interconnection 116, and the lower seal edge 1132 of piston 113 is resisted against respectively on the sidewall of cylinder 130 with back seal edge 1133.In this state, fluid passage 114 is communicated with by the annular inward flange 1131 of piston 113 through the fluid between the reservoir of interconnection 116 and cylinder 130 and stops up, thereby the interior liquid of the reservoir of cylinder 130 can't pass through fluid passage 114 and outwards distribute.
When pressure head 120 was pushed downwards and driven power that piston component 110 overcomes spring 150 and move downward with respect to cylinder 130, two sealing edges 1132,1133 of piston 113 were resisted against on the sidewall of cylinder 130 and to lower slider.Because the downward propulsive effort of the annular inward flange 1131 of piston rod 111 and the 115 pairs of pistons 113 in piston junction surface and cylinder 130 sidewalls are to the upwards compound action of friction force of the sealing edge 1132,1133 of piston 113; And because the deformation space that the type conical bench face 1111 of piston rod 111 provides for piston 113 causes piston 113 towards type conical bench face 1111 sides that is piston rod 111 sides the distortion shown in Fig. 1 b to take place.This distortion causes the annular inward flange 1131 of piston 113 to depart from piston junction surface 115; Thereby cause the sealing of 113 pairs of interconnections 116 of piston to be opened, thereby allow the interior liquid of reservoir of cylinder 130 under the downward pump function of piston component 110, to pass through interconnection 116 and fluid passage 114 outwards pumpings of quilt.Afterwards, during downward pressure on removing pressure head 120, piston component 110 under the power that the upsprings effect of spring 150 with respect to cylinder 130 upward movements.At this moment; Because the unpromising piston 113 of steep end face 1121 of piston head 112 provides to the space of piston head 112 sides distortion, thereby piston 113 can not produce distortion basically and make the annular inward flange 1131 of piston 113 depart from piston junction surface 115 and open the sealing to interconnection 116.In a word; Piston component 110 is configured to: when piston component 110 keeps static with respect to cylinder 130; Piston 113 remains on the engage position with piston junction surface 115, thereby sealing interconnection 116 stops reservoir to communicate with external container through fluid passage 114; When piston component 110 moved downward with respect to cylinder 130, piston 113 produced distortion and departs from this engage position, thereby opens the interconnection 116 at piston junction surface 115, allows reservoir to communicate with external container through fluid passage 114; And when piston component 110 during with respect to cylinder 130 upward movements, piston 113 still remains on this engage position basically, thereby sealing interconnection 116 stops reservoir to communicate with external container through fluid passage 114.Therefore, in piston component 110, the piston 113 that is installed in 115 places, piston junction surface has played the effect of last check valve, and check valve is cooperated mutually with following unidirectional ball valve 160 and realized the imbibition and the discharge opeing effect of the reservoir of cylinder 130 with permission on this.
JP52-112107 has also disclosed a kind of liquid pump of the above-mentioned type.Shown in Fig. 2 a-2e, the basic structure of this liquid pump and above-mentioned JP2004-131163's is roughly the same, the different structures that only is piston 213 change to some extent.Therefore, the Reference numeral that is adopted among Fig. 2 a-2e all obtains first digit " 1 " replacement of the Reference numeral among Fig. 1 a-1e with " 2 ", and identical Reference numeral is represented similar member except that first digit.Specifically, this liquid pump mainly comprises pressure head 220, cylinder 230, integral type facing-cylinder cover 240, spring 250, following unidirectional ball valve 260 and piston component 210.Piston component 210 comprise integrally formed piston rod that extends longitudinally 211 and piston head 212 and be set in piston rod 211 and piston head 212 between the piston 213 at 215 places, piston junction surface.The structure of the piston 113 among piston 213 and the JP2004-131163 is different, and it is made up of upper and lower two parts one substantially, and top 2135 is roughly cylindrical, and lower part 2136 roughly is taper type.The upper end on top 2135 is formed with annular inward flange 2137, and this annular inward flange limits a central circular through hole, supplies piston junction surface 215 between piston rod 211 and the piston head 212 to pass and basically around this piston junction surface 215.Lower part 2136 is along with expanding outwardly to extending below and attenuation gradually, to constitute a sealing member that contacts with cylinder 230 sidewalls of piston 213 gradually.The thickness on top 2135 will significantly be thicker than lower part 2136.
The mode of operation of the liquid pump that JP52-112107 disclosed and JP2004-131163's is similar; Wherein, In a word, piston component 210 also is configured to: when piston component 210 kept static with respect to cylinder 230, piston 213 remained on the engage position with piston junction surface 215; Thereby sealing interconnection 216 stops reservoir to communicate with external container through fluid passage 214; When piston component 210 moved downward with respect to cylinder 230, piston 213 produced distortion and departs from this engage position, thereby opens the interconnection 216 at piston junction surface 215, allows reservoir to communicate with external container through fluid passage 214; And when piston component 210 during with respect to cylinder 230 upward movements, piston 213 still remains on this engage position basically, thereby sealing interconnection 216 stops reservoir to communicate with external container through fluid passage 214.Specifically, when pressure head 220 was pushed downwards and driven power that piston component 210 overcomes spring 250 and move downward with respect to cylinder 230, the ora terminalis of the lower part 2136 of piston 213 was resisted against on the sidewall of cylinder 230 and to lower slider.Because the downward propulsive effort of the annular inward flange 2137 of piston rod 211 and the 215 pairs of pistons 213 in piston junction surface and cylinder 230 sidewalls are to the upwards compound action of friction force of the ora terminalis of the lower part 2136 of piston 213; And because the deformation space that the type conical bench face 2111 of piston rod 211 provides for piston 213 causes piston 213 towards type conical bench face 2111 sides that is piston rod 211 sides the distortion shown in Fig. 2 b to take place.This distortion causes the annular inward flange 2131 of piston 213 to depart from piston junction surface 215; Thereby cause the sealing of 213 pairs of interconnections 216 of piston to be opened, thereby allow the interior liquid of reservoir of cylinder 230 under the downward pump function of piston component 210, to pass through interconnection 216 and fluid passage 214 outwards pumpings of quilt.Afterwards, during downward pressure on removing pressure head 220, piston component 210 under the power that the upsprings effect of spring 250 with respect to cylinder 230 upward movements.At this moment; Because the unpromising piston 213 of steep end face 2121 of piston head 212 provides to the space of piston head 212 sides distortion, thereby piston 213 can not produce remarkable distortion basically and make the annular inward flange 2131 of piston 213 depart from piston junction surface 215 and open the sealing to interconnection 216.
For above-mentioned two kinds of prior art constructions; The piston rod of its piston component and piston head and the constriction piston junction surface between them are integrally formed; And this piston junction surface also has interconnection; Therefore, must use the composite die that comprises half module and core to produce the piston rod of this integral type-piston junction surface-piston head member.This manufacturing process of complicated composite die that adopts has not only increased equipment cost, but also has limited capacity rating, looses core and divides multiple operation such as mould because wherein will relate to.And well-known, the existence of half module structure yields poorly, the shortcoming of low precision; Wherein, Because can there be dislocation inevitably in die joint and produces the problem of overlap,, finally possibly cause the problem such as leaking of assembly so influence dimensional accuracy of products easily.
Another problem of above-mentioned prior art structure is; Because the piston junction surface of matching with piston is the neck down portions (being the outer dia of its outer dia less than piston rod and piston head) between piston rod and piston head; Therefore in the time of on piston being assembled to this piston junction surface; Need be with the central circular through hole hole enlargement by force of the annular inward flange of piston; So that slippage is to the piston junction surface through having larger-diameter piston rod or piston head, and such assembling is wasted time and energy very much, and can not be applicable to automated assembly line.In addition, the central circular through hole of piston is being passed through piston rod or the such large-diameter portion timesharing of piston head, and its inner circumference is impaired breaking easily, thereby influence the work life of piston component and then liquid pump.
In addition; For the structure of piston that JP52-112107 disclosed; When it being moved downward when pushing pressure head; Because of the lower part 2136 of piston 213 receives the effect of cylinder 230 sidewalls to fluid pressure in its friction force that makes progress and the cylinder, the piston 213 former sealings that should make progress distortion rapidly and open 2137 pairs of interconnections 216 of annular inward flange of piston 213, but because the top 2135 of piston 213 is thicker and not yielding; Might cause interconnection 216 to fail to be opened or in time to open, thus cause can't pumping liquid problem.
Summary of the invention
Seeing that the problem that the liquid pump of the use elastic body piston of prior art exists, the main purpose of the utility model is to provide a kind of product precision and quality to improve and be convenient to realize the liquid pump of the use elastic body piston of automated assembly.
Another purpose of the utility model is to provide a kind of piston component that is used for the liquid pump of functional reliability raising.
In order to realize the above-mentioned purpose of the utility model; According to an aspect of the utility model, a kind of liquid pump that uses the elastic body piston is provided, be used to be installed on the container so that the liquid pumping in the said container is arrived said external container; Said liquid pump comprises and is arranged on the piston component in the cylinder along said liquid pump longitudinally-slidablely; Said cylinder is defined for the reservoir of storaging liquid therein, and said piston component comprises: piston rod, its center longitudinally run through and are formed with fluid passage; Piston head, it is connected in the lower end of said piston rod; The piston junction surface; It is constriction shape ground between said piston rod and said piston head; Said piston head is connected in said piston rod through said piston junction surface; Said piston junction surface have be communicated with said fluid passage, radially run through the interconnection that extend at said piston junction surface, thereby provide pumping to go out the path of said container for the liquid in the said reservoir; And the piston of processing by elastomeric material; It is set on the said piston junction surface between said piston rod and the said piston head, is used for sealing said interconnection, wherein with opening; Said piston component is configured to: when said piston component keeps static with respect to said cylinder; Said piston remains on the engage position with said piston junction surface, thereby seals said interconnection, stops said reservoir to communicate with said external container through said fluid passage; When said piston component moved downward with respect to said cylinder, said piston produced distortion and departs from said engage position, thereby opens the interconnection at said piston junction surface, allows said reservoir to communicate with said external container through said fluid passage; When said piston component during with respect to said cylinder upward movement, said piston remains on said engage position, thereby seals said interconnection, stops said reservoir to communicate with said external container through said fluid passage.The characteristics of the liquid pump of the utility model are that said piston rod and said piston head are separately to provide and be assemblied in together, and said piston junction surface forms part by the piston junction surface in said piston rod and the said piston head at least one and constitutes.
Here by the way, described in this paper " on " and D score be to confirm with respect to the orientation of liquid pump when normal use the (liquid pump be arranged to its longitudinal direction and vertical direction consistent).
Utilize the liquid pump of this use elastic body piston of the utility model; Because piston rod and piston head are separately to provide and be assemblied in together, thereby can avoid the piston rod-piston junction surface-piston head member of integral type to use complex combination mould problem, the problem includes: the problem that manufacturing is complicated, capacity rating is not high because of needs.And, because the utility model need not use half module, thus eliminated with adopt half module to carry out moldedly relevant to yield poorly, the problem of low precision.
Preferred implementation according to the utility model; Said piston head comprises base and from the upwardly extending guide rod of said base; Said piston rod comprises the guide rod receiving opening that is positioned at its lower end; Said guide rod receiving opening forms the part of said fluid passage, and said guide rod inserts and is matched with in the said guide rod receiving opening and said piston head is assemblied in said piston rod, and said guide rod is formed with at least one longitudinal fluting along its longitudinal length; Said longitudinal fluting constitutes vertical passage in said guide rod receiving opening; Said piston junction surface is formed with the interconnection of respective numbers, make said longitudinal fluting be communicated with corresponding said interconnection in the said piston junction surface, thereby said longitudinal fluting provides the path from said interconnection to said fluid passage.
Utilize such structure, piston rod and piston head can utilize they self structure to be affixed at an easy rate together, need not other any separate connecting device, and this makes assembling become more convenient, is easy to realize automated production.And in case piston rod connects together with piston head, needed fluid passage, interconnection and vertical passage just can both be shaped, thereby without any need for extra manufacturing procedure, it is minimum that productive costs is dropped to.
Preferred implementation according to the utility model; Said piston junction surface is provided by in said piston rod and the said piston head each; Wherein said piston rod is formed with columniform reducing pipe portion and forms part as a said piston junction surface in its lower end; Said reducing pipe portion limits the part of said guide rod receiving opening; Said piston head is formed with columniform undergauge boss portion and forms part as another said piston junction surface in the upper end of its said base; Said reducing pipe portion has identical diameter with said undergauge boss portion, makes that said reducing pipe portion and said undergauge boss portion abut against each other and constitute said piston junction surface jointly when said piston head is assemblied in said piston rod.
According to the utility model, the said interconnection at said piston junction surface can be formed in the said undergauge boss portion.The said interconnection at said piston junction surface can be integrally formed with the said longitudinal fluting of said guide rod.Certainly, the said interconnection at said piston junction surface also can be formed in the said reducing pipe portion, perhaps, can be formed at simultaneously in said reducing pipe portion and the said undergauge boss portion.
According to the utility model; Said piston junction surface can only be provided by said piston head; Wherein said piston head is formed with columniform undergauge boss portion and forms part as said piston junction surface in the upper end of its said base; When said piston head was assemblied in said piston rod, said undergauge boss portion was resisted against the lower end of said piston rod and constitutes said piston junction surface.Certainly; Said piston junction surface also can only be provided by said piston rod; Wherein said piston rod is formed with columniform reducing pipe portion and forms part as said piston junction surface in its lower end; Said reducing pipe portion limits the part of said guide rod receiving opening, when said piston head is assemblied in said piston rod, said reducing pipe portion be resisted against said piston head said base the upper end and constitute said piston junction surface.
According to the utility model, said guide rod can be formed with depressions or protrusions on its outer peripheral face, and is formed with projection or the depression that is complementary on the said conduit receiving opening its inner peripheral surface, thereby helps said piston head is assemblied in said piston rod.
According to the utility model; Comprise under the situation of integral type facing-cylinder cover and pressure head at said liquid pump; Said cylinder is connected in the downside of said integral type facing-cylinder cover; Said pressure head is connected in the upper end of said piston rod; Said pressure head is stamped one with respect to said integral type facing-cylinder and pushes stroke top dead center position and and push the bottom of stroke position; Said integral type facing-cylinder cover has the outer ring and the inner ring of vertical extension, and said outer ring is used for engaging with the open neck of said container and said liquid pump being installed on said container, and said inner ring engages with the upper end of said cylinder and makes said cylinder be connected in the downside of said integral type facing-cylinder cover and form the osed top cylinder; When said pressure head is in saidly when pushing the stroke top dead center position with respect to said integral type facing-cylinder cover, the lower end of said inner ring is engaged in the said annular breach of said piston.
According to the utility model; At said cylinder under the situation that is formed with the balance pore that is used for the said container external and internal pressure of balance on its sidewall; When said pressure head is in said when pushing the stroke top dead center position with respect to said integral type facing-cylinder cover; Said balance pore can be positioned at the top against point of the sealing edge and the said cylinder side wall of said piston, and is positioned at the below against point of the said inner ring and the said piston of said integral type facing-cylinder cover.
According to the utility model; Said piston rod can have the tapered type conical bench face towards said piston junction surface in the junction with said piston junction surface; And said piston head has in the junction with said piston junction surface perpendicular to steep step surface longitudinally, and said type conical bench face is that said piston provides deformation space.Said piston junction surface can have diameter-increasing portion in the junction with said type conical bench face.
In addition; According to another aspect of the utility model, a kind of piston component that is used for the liquid pump is provided, said liquid pump is used to be installed on the container so that the liquid pumping in the said container is arrived said external container; Said liquid pump comprises and is arranged on the piston component in the cylinder along said liquid pump longitudinally-slidablely; Said cylinder is defined for the reservoir of storaging liquid therein, and said piston component comprises: piston rod, its center longitudinally run through and are formed with fluid passage; Piston head, it is connected in the lower end of said piston rod; The piston junction surface; It is constriction shape ground between said piston rod and said piston head; Said piston head is connected in said piston rod through said piston junction surface; Said piston junction surface have be communicated with said fluid passage, radially run through the interconnection that extend at said piston junction surface, thereby provide pumping to go out the path of said container for the liquid in the said reservoir; And the piston of processing by elastomeric material; It is set on the said piston junction surface between said piston rod and the said piston head; Be used for and can seal said interconnection with opening, said piston component is configured to: when said piston component kept static with respect to said cylinder, said piston remained on the engage position with said piston junction surface; Thereby seal said interconnection, stop said reservoir to communicate with said external container through said fluid passage; When said piston component moved downward with respect to said cylinder, said piston produced distortion and departs from said engage position, thereby opens the interconnection at said piston junction surface, allows said reservoir to communicate with said external container through said fluid passage; When said piston component during with respect to said cylinder upward movement, said piston remains on said engage position, thereby seals said interconnection, stops said reservoir to communicate with said external container through said fluid passage.The characteristics of this piston component are; Said piston comprises the body cylindraceous that is both ends open substantially; Said body is formed with the annular inward flange of radial inward projection in the top; Said annular inward flange is engaged on the outer peripheral face at said piston junction surface and is used for sealing said interconnection with opening; Said body is formed with in its lower end slidably against the sealing edge of the sidewall of said cylinder, said sealing edge be said body along with expanding outwardly gradually to extending below and the ora terminalis of the bottom of attenuation, its periphery of the upper end edge that is formed with said annular inward flange of said body is formed with annular breach.
Utilize the above-mentioned piston component of the utility model; Because the periphery of piston in the upper end that is formed with annular inward flange of its body of deformable elastomeric material is formed with annular breach; Thereby reduced the rigidity of this part; Avoided becoming problem big, that be not easy to be out of shape, thereby improved this piston and then be the functional reliability of piston component because of the rigidity that the horizontal existence of inward flange causes.And; This annular breach can engage with the inner ring of integral type facing-cylinder cover and form the sealing anchor ring, and the sealing anchor ring is cooperated mutually with the sealing of piston lower seal edge and cylinder side wall and helped to prevent that liquid in container from passing through the leakage of formed balance pore in the cylinder side wall.
Other characteristics of the utility model and advantage will the description to exemplary embodiment embodies with reference to accompanying drawing through following.
Description of drawings
Fig. 1 a is the cutaway view of a liquid pump of prior art;
Fig. 1 b is that the liquid pump of Fig. 1 a is in the cutaway view in the process of moving downward at piston component;
Fig. 1 c is the lateral plan of the piston rod-piston junction surface-piston head of the integral type that adopted in the liquid pump of Fig. 1 a;
Fig. 1 d is the cutaway view along the A-A line among Fig. 1 c;
Fig. 1 e is the cutaway view of the piston that adopted in the liquid pump of Fig. 1 a;
Fig. 2 a is the cutaway view of another liquid pump of prior art;
Fig. 2 b is that the liquid pump of Fig. 2 a is in the cutaway view in the process of moving downward at piston component;
Fig. 2 c is the lateral plan of the piston rod-piston junction surface-piston head of the integral type that adopted in the liquid pump of Fig. 2 a;
Fig. 2 d is the cutaway view of the piston rod-piston junction surface-piston head of integral type along the B-B line among Fig. 2 c;
Fig. 2 e is the cutaway view of the piston that adopted in the liquid pump of Fig. 2 a;
Fig. 3 a is the cutaway view of the liquid pump of the utility model embodiment, and wherein pressure head is in respect to integral type facing-cylinder cover and pushes the stroke top dead center position;
Fig. 3 b is that the liquid pump of Fig. 3 a is in the cutaway view in the process of moving downward at piston component;
Fig. 4 a is the lateral plan of the piston rod that adopted in the liquid pump of Fig. 3 a;
Fig. 4 b is the cutaway view of piston rod along the C-C line among Fig. 4 a;
Fig. 4 c is the block diagram of the piston rod of Fig. 4 a;
Fig. 5 a is the birds-eye view of the piston head that adopted in the liquid pump of Fig. 3 a;
Fig. 5 b is the cutaway view of piston head along the D-D line among Fig. 5 a;
Fig. 5 c is the lateral plan of the piston head of Fig. 5 a;
Fig. 5 d is the block diagram of the piston head of Fig. 5 a;
Fig. 6 a is the lateral plan of the piston that adopted in the liquid pump of Fig. 3 a;
Fig. 6 b is the cutaway view of piston along the line E-E among Fig. 6 a;
Fig. 6 c is the block diagram of the piston of Fig. 6 a;
Fig. 7 is the view sub-anatomy of the piston component that adopted in the liquid pump of Fig. 3 a; And
Fig. 8 is the block diagram of the piston component of Fig. 7, and wherein the part of piston is excised more to clearly illustrate the structure at piston junction surface.
Fig. 9-the 10th is similar to the view of Fig. 3-4, and it shows another embodiment of piston rod and piston head;
Figure 11-the 12nd is similar to the view of Fig. 3-4, and it shows another embodiment of piston rod and piston head.
The specific embodiment
Referring to Fig. 3-6, this liquid pump mainly comprises piston component 10, pressure head 20, cylinder 30, integral type facing-cylinder cover 40, spring 50 and following unidirectional ball valve 60.This liquid pump is installed on the peristome (the normally neck of the opening of container) of containers for liquid products (not shown) through integral type facing-cylinder cover 40.Certainly, also can adopt the facing and the cylinder cover of separation.Because the utility model mainly relates to the piston component in the liquid pump, so the applicant do not form member to other of liquid pump at this and do not describe in detail, and these composition members can be traditional structures.
Piston head 12 comprises base 121 and from the upwardly extending guide rod 123 of this base, this guide rod 123 inserts and is fixed in the formed guide rod receiving opening 1105 in piston rod 11 lower ends, and this guide rod receiving opening forms the part of fluid passage 14.Guide rod 123 circumferentially is formed with annular notches 126 in its outer peripheral face upper edge, and the prominent rib 1106 of formed respective annular matches in the guide rod receiving opening 1105 of this annular notches and piston rod 11, to help guide rod 123 fixing in guide rod receiving opening 1105.The upper end of base 121 is formed with columniform undergauge boss portion 122, and it forms part as another piston junction surface.The diameter of this undergauge boss portion is greater than the diameter of guide rod 123, and identical with the diameter of reducing pipe portion 1103 on the piston rod 11.Therefore, when piston head 12 was assemblied in piston rod 11, the reducing pipe portion 1103 of piston rod 11 abut against each other with the undergauge boss portion 122 of piston head 12 and constitutes piston junction surface 15 jointly.
The guide rod 123 of piston head 12 is formed with along two respect to one another of diametric(al) (can certainly be or other suitable quantity) longitudinal fluting 124 along its longitudinal length, and this longitudinal fluting has constituted vertical passage in guide rod receiving opening 1105.Corresponding position in undergauge boss portion 122 also is formed with the interconnection 125 of respective numbers; This interconnection 125 extends to longitudinal fluting 124 from the outer peripheral face radial inward of undergauge boss portion 122 and is communicated with, thereby longitudinal fluting 124 provides from interconnection 125 to fluid passage 14 path.Longitudinal fluting 124 in this interconnection 125 and the guide rod 123 is integrally formed and does not have obvious border, so that mould process.Base 121 provides one perpendicular to steep step surface 127 longitudinally in the junction with undergauge boss portion 122, be used for the distortion of limited piston 13 towards these steep step surface 127 1 sides.
Piston 13 comprises that one is the body cylindraceous of both ends open substantially.This body is formed with the annular inward flange 131 of radial inward projection in the top, and this annular inward flange forms an inner peripheral surface, is used to be engaged on the outer peripheral face at piston junction surface 15 and is used for sealing interconnection 125 with opening.This body is formed with in its lower end slidably against the sealing edge 132 of the sidewall of cylinder 30, the sealing edge be body along with expanding outwardly gradually to extending below and the ora terminalis of the bottom of attenuation.Its periphery of the upper end edge that is formed with annular inward flange 131 of this body is formed with an annular breach 133; The setting of this annular breach can suitably reduce the rigidity at this position; Make this position become big rigidity and can suitably reduce because of annular inward flange 131 is set originally, thereby improve the deformation performance of piston 13.Certainly, do not have this annular breach 133 conventional piston (such as in background technology part, commented those) can be applied in equally in the piston component of the utility model.
Following mask body is explained the work of the liquid pump of the utility model with reference to Fig. 3 a and 3b.The liquid pump of the utility model can be sticked in through the upper end 33 with cylinder 30 on the inner ring 42 of integral type facing-cylinder cover 40 and install, this integral type facing-cylinder cover 40 and then be installed to again on the container (not shown) of liquid product.When the liquid pump remains static that is pressure head 20 when not being pressed, shown in Fig. 3 a, pressure head 20 is in respect to integral type facing-cylinder cover 40 pushes the stroke top dead center position, and piston component 10 is positioned at its extreme higher position.At this moment, the convex shoulder 1102 of piston rod 11 is resisted against on integral type facing-cylinder cover 40 on the formed corresponding shoulder, and the upper surface of the annular breach 133 of piston 13 by the lower surface of the inner ring 42 of integral type facing-cylinder cover 40 against.In this position, formed balance pore 32 is positioned at the top against point against below, piston 13 and the cylinder 30 put of piston 13 and inner ring 42 in the sidewall of cylinder 30, just is enclosed in these two against between the point.Therefore, can prevent that the liquid in the container from getting into cylinder 30 and then leaking out container through this balance pore 32.Piston 13 keeps being bonded on the outer peripheral face at piston junction surface 15 of piston component 10; Thereby the interconnection 125 at closed piston junction surface 15 prevents that the liquid in the reservoir 31 from flowing to external container through the longitudinal fluting 124 of this interconnection 125 and guide rod 123 and then through fluid passage 14.
When pushing pressure head 20 downwards when the upwards elastic force that overcomes spring 50, shown in Fig. 3 b, piston component 10 moves downward under the drive of pressure head 20.The sealing edge 132 of piston 13 is resisted against on the sidewall of cylinder 30 and to lower slider.Because the downward propulsive effort of the annular inward flange 131 of piston rod 11 and the 115 pairs of pistons 13 in piston junction surface and cylinder 30 sidewalls are to the upwards compound action of friction force of the sealing edge 132 of piston 13; And because the deformation space that the type conical bench face 1104 of piston rod 11 provides for piston 13 causes piston 13 to deform towards type conical bench face 1104 sides that is piston rod 11 sides.This distortion causes the annular inward flange 131 of piston 13 to depart from piston junction surface 115; Thereby cause the sealing of 13 pairs of interconnections 125 of piston to be opened, thereby allow the liquid in the reservoir 31 under the downward pump function of piston component 10, to pass through interconnection 125, depression 124 and fluid passage 14 pumping outside container.At this moment, following unidirectional ball valve 60 prevents that because of the pump pressure in the cylinder 30 keeps shut the liquid in the reservoir 31 from flowing out downwards.
Afterwards, during downward pressure on removing pressure head 20, piston component 10 under the power that the upsprings effect of spring 50 with respect to cylinder 30 upward movements.At this moment; Because the steep end face 127 of piston head 12 does not provide the space to the distortion of piston head 12 sides for piston 13; Thereby piston 13 can not produce distortion basically and make the annular inward flange 131 of piston 13 depart from piston junction surface 15 and open the sealing to interconnection 125; Like this, being communicated with between reservoir 31 and the external container is cut off.Because the upward movement of piston component 10 produces negative pressure in the reservoir 31 of cylinder 30, this negative pressure is opened unidirectional ball valve 60, and the liquid in the container is sucked reservoir 31, supplies next pumping.
Following mask body is explained the above production with reference to the described piston component of Fig. 3-6 of the utility model with reference to Fig. 7 and 8.At first, respectively through molded piston rod 11, piston head 12 and the piston 13 of forming.Then, piston 13 covers are set on the guide rod 123 of piston head 12, make the central circular through hole that undergauge boss portion 122 gets into or part gets into annular inward flange 131.Afterwards; The guide rod 123 of the central circular through hole of passing piston of piston head 12 is inserted and is fixed in the guide rod receiving opening 1105 of piston rod 11; At this moment, the central circular through hole of piston 13 just is set on the outer peripheral face of reducing pipe portion 1103 of undergauge boss portion 122 and piston rod 11 of piston head 11 simultaneously.The piston component that is assembled is as shown in Figure 8.
The method of the piston component that described above is is used for shop print 3-6 illustrated embodiment (wherein the piston junction surface is provided by piston rod and piston head simultaneously) wherein is located at piston bush on the piston head, and then piston head is assembled on the piston rod.But be appreciated that and also can select piston bush is located on the piston rod (because have at least on the piston rod piston junction surface form part be used to admit piston), and then piston head is assembled on the piston rod.In a word; As long as piston rod or piston head have the part that is used to admit piston; No matter the piston junction surface is provided still by piston rod and piston head simultaneously only provides by one in piston rod and the piston head; Can select piston is set in earlier on this piston rod or the piston head, and then piston head or piston rod are assembled on this piston rod or the piston head.
Abovely described the embodiment of the utility model with reference to Fig. 3-8, wherein piston junction surface 15 is provided by piston rod 11 and piston head 12 simultaneously.But according to the utility model, the piston junction surface also can only provide by one in piston rod and the piston head.
Fig. 9-10 shows another embodiment of the utility model, and wherein the piston junction surface is only provided by piston rod.In this embodiment, the structure of piston rod and piston head is most of identical with the embodiment of Fig. 4-5, therefore, has adopted identical Reference numeral to add single quotation marks and has come part like the representation class.Compare with the embodiment of Fig. 4-5; Different only being, in the present embodiment, piston head 12 ' is not provided with undergauge boss portion 122 on its base 121 '; And piston rod 11 ' has full-scale reducing pipe portion 1103 ' in its lower end; Like this, piston junction surface 15 just individually is made up of the reducing pipe portion 1103 ' that is arranged on the piston rod 11 ', constitutes with reducing pipe portion 1103 on the piston rod 11 but not resemble the embodiment of Fig. 4-5 by the undergauge boss portion on the piston head 12 122.Reducing pipe portion 1103 ' is formed with two interconnections 1110 respect to one another along diametric(al), that run through to extend to inner peripheral surface from the outer peripheral face radial inward of reducing pipe portion 1103 ' in its lower end.The width of this interconnection 1110 can be made into piston head 12 ' on the basically identical of longitudinal fluting 124 '.When piston head 12 ' is assemblied in piston rod 11 '; The lower end abutment of the reducing pipe portion 1103 ' of piston rod 11 ' is in the upside of the base 121 ' of piston head 12 ', thereby and two interconnections 1110 and two longitudinal flutings 124 ' alignd basically interconnection 1110 and longitudinal fluting 124 ' are communicated with each other.The structure of the piston component that assembles like this, and shown in Figure 8 be basically identical.
Figure 11-12 shows another embodiment of the utility model, and wherein the piston junction surface is only provided by piston rod.In this embodiment, the structure of piston rod and piston head is most of identical with the embodiment of Fig. 4-5, therefore, has adopted identical Reference numeral to add double quotation marks and has come part like the representation class.Compare with the embodiment of Fig. 4-5; Different only being, in the present embodiment, piston rod 11 " be not provided with reducing pipe portion 1103 in its lower end; and piston head 11 " at its base 121 " upside be provided with full-scale undergauge boss portion 122 "; Like this, piston junction surface 15 is just by being arranged on piston head 12 " on undergauge boss portion 122 " individually constitute, constitute with reducing pipe portion 1103 on the piston rod 11 but not resemble the embodiment of Fig. 4-5 by the undergauge boss portion on the piston head 12 122.Undergauge boss portion 122 " in its underpart with guide rod 123 " longitudinal fluting 124 " basic positions aligning is formed with interconnection 125 ", this interconnection 125 " from undergauge boss portion 122 " the outer peripheral face radial inward extend to and longitudinal fluting 124 " communicate with each other.The width of this interconnection 1110 can be made into piston head 12 ' on longitudinal fluting 124 " basically identical.When piston head 12 " be assemblied in piston rod 11 " time, piston head 12 " undergauge boss portion 122 " upside be resisted against piston rod 11 " the lower end, thereby make undergauge boss portion 122 " with piston rod 11 " on type conical bench face 1104 " direct neighbor.The structure of the piston component that assembles like this, and shown in Figure 8 also be basically identical.
In the exemplary embodiment of the utility model described above; In order to simplify purpose of description; Many aspects of the utility model are combined among the same embodiment implement;, these aspects that it will be understood by those skilled in the art that the utility model realize the purpose of the utility model respectively but can implementing fully independently.For example; In an illustrated embodiment; The piston rod that the having of the utility model provides respectively and be assemblied in together and the piston component of piston head have included the piston with annular breach of the utility model, but the two can be implemented in various embodiment to realize its corresponding usefulness fully.Certainly, those skilled in the art are appreciated that also the technical scheme with these two aspects of the utility model is used in combination, and can obtain more significant technique effect.
In addition, in the spirit of the utility model, those skilled in the art can to shown in embodiment carry out various variations.For example; In an illustrated embodiment; Piston rod and piston head are to be configured to the part of piston head is inserted and is matched with in the part of piston rod, but also can piston rod and piston head are configured to the part of piston rod is inserted and is matched with in the part of piston head.Again for example, in an illustrated embodiment, the depression and the quantity of interconnection are respectively two in the piston head, but also can select the depression and the interconnection of one or other quantity.Again for example; In an illustrated embodiment; Interconnection in the piston junction surface is that the undergauge boss portion by piston head provides, but this interconnection also can be only provides by the reducing pipe portion of piston rod, or is provided by the boss portion of piston head and the reducing pipe portion of piston rod simultaneously.Obviously, above-mentioned these change all can not influence the enforcement of the utility model and the realization of goal of the invention thereof.Therefore, the protection domain of the utility model is not limited to the described specific embodiment, and should rationally be limited claims.
Claims (19)
1. liquid pump that uses the elastic body piston; Be used to be installed on the container so that the liquid pumping in the said container is arrived said external container; Said liquid pump comprises and is arranged on the piston component in the cylinder along said liquid pump longitudinally-slidablely; Said cylinder is defined for the reservoir of storaging liquid therein, and said piston component comprises:
Piston rod, its center longitudinally run through and are formed with fluid passage;
Piston head, it is connected in the lower end of said piston rod;
The piston junction surface; It is constriction shape ground between said piston rod and said piston head; Said piston head is connected in said piston rod through said piston junction surface; Said piston junction surface have be communicated with said fluid passage, radially run through the interconnection that extend at said piston junction surface, thereby provide pumping to go out the path of said container for the liquid in the said reservoir; And
By the piston that elastomeric material is processed, it is set on the said piston junction surface between said piston rod and the said piston head, be used for sealing said interconnection with opening,
Said piston component is configured to: when said piston component keeps static with respect to said cylinder; Said piston remains on the engage position with said piston junction surface; Thereby seal said interconnection, stop said reservoir to communicate with said external container through said fluid passage; When said piston component moved downward with respect to said cylinder, said piston produced distortion and departs from said engage position, thereby opens the interconnection at said piston junction surface, allows said reservoir to communicate with said external container through said fluid passage; When said piston component during with respect to said cylinder upward movement, said piston remains on said engage position, thereby seals said interconnection, stops said reservoir to communicate with said external container through said fluid passage,
It is characterized in that said piston rod and said piston head are separately to provide and be assemblied in together, said piston junction surface forms part by the piston junction surface in said piston rod and the said piston head at least one and constitutes.
2. liquid pump as claimed in claim 1; It is characterized in that; Said piston head comprises base and from the upwardly extending guide rod of said base, said piston rod comprises the guide rod receiving opening that is positioned at its lower end, and said guide rod receiving opening forms the part of said fluid passage; Said guide rod inserts and is matched with in the said guide rod receiving opening and said piston head is assemblied in said piston rod
Said guide rod is formed with at least one longitudinal fluting along its longitudinal length; Said longitudinal fluting constitutes vertical passage in said guide rod receiving opening; Said piston junction surface is formed with the interconnection of respective numbers; Make said longitudinal fluting be communicated with, thereby said longitudinal fluting provide the path from said interconnection to said fluid passage with corresponding said interconnection in the said piston junction surface.
3. liquid pump as claimed in claim 2; It is characterized in that; Said piston junction surface is provided by in said piston rod and the said piston head each; Wherein said piston rod is formed with columniform reducing pipe portion and forms part as a said piston junction surface in its lower end, said reducing pipe portion limits the part of said guide rod receiving opening
Said piston head is formed with columniform undergauge boss portion and forms part as another said piston junction surface in the upper end of its said base; Said reducing pipe portion has identical diameter with said undergauge boss portion; Make that said reducing pipe portion and said undergauge boss portion abut against each other and constitute said piston junction surface jointly when said piston head is assemblied in said piston rod.
4. liquid pump as claimed in claim 3 is characterized in that, the said interconnection at said piston junction surface is formed in the said undergauge boss portion.
5. liquid pump as claimed in claim 4 is characterized in that, the said interconnection at said piston junction surface and the said longitudinal fluting of said guide rod are integrally formed.
6. liquid pump as claimed in claim 3 is characterized in that, the said interconnection at said piston junction surface is formed in the said reducing pipe portion.
7. liquid pump as claimed in claim 3 is characterized in that, the said interconnection at said piston junction surface is formed in said reducing pipe portion and the said undergauge boss portion simultaneously.
8. liquid pump as claimed in claim 2; It is characterized in that; Said piston junction surface is only provided by said piston head; Wherein said piston head is formed with columniform undergauge boss portion and forms part as said piston junction surface in the upper end of its said base, when said piston head was assemblied in said piston rod, said undergauge boss portion was resisted against the lower end of said piston rod and constitutes said piston junction surface.
9. liquid pump as claimed in claim 2; It is characterized in that; Said piston junction surface is only provided by said piston rod, and wherein said piston rod is formed with columniform reducing pipe portion and forms part as said piston junction surface in its lower end, and said reducing pipe portion limits the part of said guide rod receiving opening; When said piston head is assemblied in said piston rod, said reducing pipe portion be resisted against said piston head said base the upper end and constitute said piston junction surface.
10. liquid pump as claimed in claim 2; It is characterized in that; Said guide rod is formed with depressions or protrusions on its outer peripheral face, and is formed with projection or the depression that is complementary on the said conduit receiving opening its inner peripheral surface, thereby helps said piston head is assemblied in said piston rod.
11. liquid pump as claimed in claim 1; It is characterized in that; What said piston comprised both ends open is body cylindraceous substantially, and said body is formed with on the outer peripheral face radial inward projection, that be engaged in said piston junction surface and is used for sealing the annular inward flange of said interconnection and slidably against the sealing edge of the sidewall of said cylinder with opening.
12. liquid pump as claimed in claim 11 is characterized in that said annular inward flange is formed on the upper end of said body, and said sealing edge be said body along with expanding outwardly gradually to extending below and the ora terminalis of the bottom of attenuation.
13. liquid pump as claimed in claim 12 is characterized in that, its periphery of the upper end edge that is formed with said annular inward flange of said body is formed with annular breach.
14. liquid pump as claimed in claim 13; It is characterized in that; Said liquid pump also comprises integral type facing-cylinder cover and pressure head, and said cylinder is connected in the downside of said integral type facing-cylinder cover, and said pressure head is connected in the upper end of said piston rod; Said pressure head is stamped one with respect to said integral type facing-cylinder and pushes stroke top dead center position and and push the bottom of stroke position
Said integral type facing-cylinder cover has the outer ring and the inner ring of vertical extension; Said outer ring is used for engaging with the open neck of said container and said liquid pump being installed on said container; Said inner ring engages with the upper end of said cylinder and makes said cylinder be connected in the downside of said integral type facing-cylinder cover and form the osed top cylinder; When said pressure head is in saidly when pushing the stroke top dead center position with respect to said integral type facing-cylinder cover, the lower end of said inner ring is engaged in the said annular breach of said piston.
15. liquid pump as claimed in claim 14; It is characterized in that; Said cylinder is formed with the balance pore that is used for the said container external and internal pressure of balance on its sidewall; When said pressure head is in saidly when pushing the stroke top dead center position with respect to said integral type facing-cylinder cover, said balance pore is positioned at the top against point of the sealing edge and the said cylinder side wall of said piston, and the said inner ring that is positioned at said integral type facing-cylinder cover and said piston against the below of putting.
16. liquid pump as claimed in claim 1; It is characterized in that; Said piston rod has the tapered type conical bench face towards said piston junction surface in the junction with said piston junction surface; And said piston head has in the junction with said piston junction surface perpendicular to steep step surface longitudinally, and said type conical bench face is that said piston provides deformation space.
17. liquid pump as claimed in claim 16 is characterized in that, said piston junction surface has diameter-increasing portion in the junction with said type conical bench face.
18. piston component that is used for the liquid pump; Said liquid pump is used to be installed on the container so that the liquid pumping in the said container is arrived said external container; Said liquid pump comprises and is arranged on the piston component in the cylinder along said liquid pump longitudinally-slidablely; Said cylinder is defined for the reservoir of storaging liquid therein, and said piston component comprises:
Piston rod, its center longitudinally run through and are formed with fluid passage;
Piston head, it is connected in the lower end of said piston rod;
The piston junction surface; It is constriction shape ground between said piston rod and said piston head; Said piston head is connected in said piston rod through said piston junction surface; Said piston junction surface have be communicated with said fluid passage, radially run through the interconnection that extend at said piston junction surface, thereby provide pumping to go out the path of said container for the liquid in the said reservoir; And
By the piston that elastomeric material is processed, it is set on the said piston junction surface between said piston rod and the said piston head, be used for sealing said interconnection with opening,
Said piston component is configured to: when said piston component keeps static with respect to said cylinder; Said piston remains on the engage position with said piston junction surface; Thereby seal said interconnection, stop said reservoir to communicate with said external container through said fluid passage; When said piston component moved downward with respect to said cylinder, said piston produced distortion and departs from said engage position, thereby opens the interconnection at said piston junction surface, allows said reservoir to communicate with said external container through said fluid passage; When said piston component during with respect to said cylinder upward movement, said piston remains on said engage position, thereby seals said interconnection, stops said reservoir to communicate with said external container through said fluid passage,
It is characterized in that; Said piston comprises the body cylindraceous that is both ends open substantially; Said body is formed with the annular inward flange of radial inward projection in the top; Said annular inward flange is engaged on the outer peripheral face at said piston junction surface and is used for sealing said interconnection with opening; Said body is formed with in its lower end slidably against the sealing edge of the sidewall of said cylinder, said sealing edge be said body along with expanding outwardly gradually to extending below and the ora terminalis of the bottom of attenuation, its periphery of the upper end edge that is formed with said annular inward flange of said body is formed with annular breach.
19. the piston component that is used for the liquid pump as claimed in claim 18 is characterized in that the longitudinal thickness of said annular inward flange is greater than the radial wall thickness of said body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203367067U CN202226189U (en) | 2011-09-08 | 2011-09-08 | Piston component and hydraulic pump using elastic piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203367067U CN202226189U (en) | 2011-09-08 | 2011-09-08 | Piston component and hydraulic pump using elastic piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202226189U true CN202226189U (en) | 2012-05-23 |
Family
ID=46076791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203367067U Expired - Lifetime CN202226189U (en) | 2011-09-08 | 2011-09-08 | Piston component and hydraulic pump using elastic piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202226189U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941968A (en) * | 2012-11-22 | 2013-02-27 | 中山环亚塑料包装有限公司 | Elastic integrated pump core |
| WO2013034038A1 (en) * | 2011-09-08 | 2013-03-14 | Ding Yaowu | Liquid pump using elastomeric piston, piston assembly and manufacturing method thereof |
| CN103342187A (en) * | 2013-07-11 | 2013-10-09 | 中山市联昌喷雾泵有限公司 | Emulsion pump with improved emulsion outlet channel |
| CN107628355A (en) * | 2016-07-19 | 2018-01-26 | 丁要武 | Emulsion pumps with waterproofing mechanism |
-
2011
- 2011-09-08 CN CN2011203367067U patent/CN202226189U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013034038A1 (en) * | 2011-09-08 | 2013-03-14 | Ding Yaowu | Liquid pump using elastomeric piston, piston assembly and manufacturing method thereof |
| CN102991839A (en) * | 2011-09-08 | 2013-03-27 | 丁要武 | Liquid pump using elastomer piston and piston assembly and production method thereof |
| CN102991839B (en) * | 2011-09-08 | 2016-04-20 | 丁要武 | Use the liquor pump of elastic piston, piston component and production method thereof |
| CN102941968A (en) * | 2012-11-22 | 2013-02-27 | 中山环亚塑料包装有限公司 | Elastic integrated pump core |
| CN102941968B (en) * | 2012-11-22 | 2015-08-26 | 中山环亚塑料包装有限公司 | A kind of resilient unitary pump core |
| CN103342187A (en) * | 2013-07-11 | 2013-10-09 | 中山市联昌喷雾泵有限公司 | Emulsion pump with improved emulsion outlet channel |
| CN107628355A (en) * | 2016-07-19 | 2018-01-26 | 丁要武 | Emulsion pumps with waterproofing mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Taixing K.K. Plastic Co., Ltd. Assignor: Ding Yaowu Contract record no.: 2013320000136 Denomination of utility model: Piston component and hydraulic pump using elastic piston Granted publication date: 20120523 License type: Exclusive License Record date: 20130318 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |
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| CX01 | Expiry of patent term |