CN107539611B - Cylinder-piston assembly and product dispenser comprising a cylinder-piston assembly - Google Patents
Cylinder-piston assembly and product dispenser comprising a cylinder-piston assembly Download PDFInfo
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- CN107539611B CN107539611B CN201610498390.9A CN201610498390A CN107539611B CN 107539611 B CN107539611 B CN 107539611B CN 201610498390 A CN201610498390 A CN 201610498390A CN 107539611 B CN107539611 B CN 107539611B
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Abstract
A plastic cylinder-piston assembly includes a cylinder and a piston slidably disposed within the cylinder. Wherein, at least one loosening ring is formed in the cylinder bore of the cylinder, the other parts of the cylinder bore except the loosening ring are body parts with a first inner diameter, the loosening ring is provided with a second inner diameter, and the second inner diameter is larger than the first inner diameter. The piston has at least one seal portion having a maximum outer diameter greater than the first inner diameter. When a product dispenser including the cylinder-piston assembly is in a locked condition, the sealing portion of the piston is within the release ring, and when the product dispenser is activated into use, the sealing portion of the piston is moved away from the release ring and into the body portion of the cylinder bore to ensure that an interference fit is formed between the sealing portion of the piston and the body portion of the cylinder bore. The problem that the piston is subjected to yield deformation and loses necessary interference due to long-term compression is solved. The invention also relates to a product dispenser comprising the cylinder-piston assembly.
Description
Technical Field
The present invention relates to a cylinder-piston assembly, and further, the cylinder-piston assembly of the present invention is primarily intended for use in a product dispenser for dispensing product from a container.
Background
In the field of daily use chemicals, a product dispenser is generally provided on a container containing a product. The consumer who purchases the product dispenses the product from the container at the time of use by operating the product dispenser (e.g., pressing). One product dispenser arrangement for such products generally includes a cylinder-piston assembly made of plastic that produces a pumping action on the product by movement of the piston within the cylinder for the purpose of dispensing the product.
For washing or skin-care daily chemical products (such as hair washing cream, body wash, etc.), the product has a long shelf life, usually up to three years, or even longer, and thus, the consumer may experience a long storage time before purchasing and using the product. Heretofore, it has been a requirement that product dispensers also be able to maintain their functional effectiveness over the course of long term storage.
However, the cylinder-piston assemblies used in dispensers are typically made of plastic, and the piston may be compressed within the cylinder for extended periods of time during extended storage to yield. This material yield can result in a reduction in the outer diameter of the piston, resulting in a reduction or even a loss of the amount of interference fit between the piston and the bore of the cylinder. This further degrades or even disappears the seal between the piston and the cylinder, and also a poor seal between the piston and the piston head due to the reduced friction between the piston and the cylinder. Thus, in use, the product dispenser may be operated without suction, such that product cannot be pumped properly.
The above-mentioned problem is common to products with product dispensers currently on the market, i.e. the functionality of the cylinder-piston assembly deteriorates after a certain period of time of placement. This problem is exacerbated in storage environments where large temperature differentials exist, accelerating the yielding of the piston, making it impossible for the consumer to properly use the product after it has been purchased.
Accordingly, there is a need in the art for a product dispenser that can be stored for long periods of time while still maintaining its functionality.
Disclosure of Invention
The present invention has been made in view of the above prior art, and an object thereof is to overcome the problems of the prior art and to achieve a longer shelf life of a product dispenser by avoiding yielding deformation of a piston due to long-term compression during storage.
The invention relates to a cylinder-piston assembly, primarily for a product dispenser, wherein the product dispenser can be switched between a locked state and a use state, and the cylinder-piston assembly comprises a cylinder and a piston slidably arranged in the cylinder, wherein:
at least one loosening ring is formed in a cylinder inner hole of the cylinder, the other part of the cylinder inner hole except the loosening ring is a body part, the body part is provided with a first inner diameter, the loosening ring is provided with a second inner diameter, and the second inner diameter is larger than the first inner diameter;
the piston has at least one sealing portion, at least the maximum outer diameter of the sealing portion of the piston being greater than the first inner diameter, thereby enabling an interference fit to be formed between the sealing portion of the piston and the body portion of the cylinder bore;
when the product dispenser is in the locked condition, the sealing portion of the piston is within the release ring, and when the product dispenser is activated into use, the sealing portion of the piston moves away from the release ring and into the body portion of the cylinder bore to ensure that an interference fit is formed between the sealing portion of the piston and the body portion of the cylinder bore.
This structure is particularly useful for cylinder-piston assemblies made of plastic.
The maximum outer diameter of the piston can be set arbitrarily as required, except that it is required to be larger than the first inner diameter of the cylinder bore. For example, the maximum outer diameter may be equal to or less than the second inner diameter of the release ring, such that when the piston is positioned in the release ring, the piston is substantially compressed, thereby maintaining its maximum outer diameter. Alternatively, the maximum outer diameter may be slightly larger than the second inner diameter. Here, the so-called "slightly larger" is limited to ensure that the piston can be fitted into the cylinder bore.
In the case that the maximum outer diameter of the piston is slightly larger than the second inner diameter of the releasing ring, although the piston is compressed by the releasing ring, yielding deformation is possible, the maximum outer diameter after deformation is at least equal to the second inner diameter of the releasing ring and still larger than the first inner diameter of the cylinder inner hole, so that in the use state, a seal is still formed between the piston and the cylinder inner hole, and the function of the product distributor is ensured.
Therefore, in the invention, the requirement on the maximum outer diameter of the piston is not strict, so that the requirement on the manufacturing precision of the piston can be reduced, the production cost is reduced, and the quality of a product can be improved.
Preferably, a transition is provided between the release ring and the body portion of the cylinder bore. In this way, a smooth transition between the release ring and the rest of the cylinder bore can be achieved.
The transition portion may be selected from at least one of the following structures: a bevel and a fillet.
When used with a product dispenser of the down-lock condition type, the piston may include a lower outer race having a seal portion and the relief ring is located at a lower portion of the cylinder such that the seal portion in the lower outer race is located in the position of the relief ring when the product dispenser is in the locked condition.
When used with a product dispenser of the up-lock condition type, the piston includes an upper outer race having a seal portion and a release ring located at an upper portion of the cylinder, the seal portion in the upper outer race being located at the release ring when the product dispenser is in the locked condition.
Further, the piston may include at least one of an upper outer race and a lower outer race, such that when the product dispenser is in the locked condition, at least a portion of the piston is prevented from yielding so long as the at least one of the upper outer race and the lower outer race is at the position of the relief ring, thereby maintaining the effectiveness of the cylinder-piston assembly.
The invention also relates to a product dispenser comprising the cylinder-piston assembly described above.
Preferably, the product dispenser is locked in said locked condition by means of a screw-fit, and only in the locked condition is the piston located at the release collar within the cylinder, while in the use condition the piston does not reach the position of said release collar at all times.
Drawings
FIG. 1 shows a longitudinal cross-sectional view of a first embodiment of the product dispenser of the present invention, wherein the product dispenser is in a locked state.
Fig. 1a shows an enlarged view of section I in fig. 1.
Figure 2 shows another longitudinal cross-sectional view of the product dispenser of the first embodiment of the present invention, wherein the product dispenser is in use.
Fig. 2a shows an enlarged view of part II in fig. 2.
Figure 3 shows a longitudinal cross-sectional view of a cylinder installed in the product dispenser of figures 1 and 2.
Fig. 3a shows an enlarged view of part III of fig. 3.
Figure 4a shows a front view of the piston installed in the product dispenser of figures 1 and 2.
Fig. 4b shows a longitudinal section through the piston shown in fig. 4 a.
Figure 5 shows a longitudinal cross-sectional view of a second embodiment of the product dispenser of the present invention, wherein the product dispenser is in a locked state.
Fig. 5a shows an enlarged view of the part IV in fig. 5.
Figure 6 shows a longitudinal cross-sectional view of the cylinder installed in the product dispenser of figure 5.
Figure 7 shows a longitudinal cross-sectional view of a piston rod and a piston formed thereon installed in the product dispenser of figure 5.
Figure 8 shows a longitudinal cross-sectional view of a third embodiment of the product dispenser of the present invention, wherein the product dispenser is in a locked condition.
Fig. 8a shows an enlarged view of the portion V in fig. 8.
Figure 9 shows a longitudinal cross-sectional view of the cylinder installed in the product dispenser of figure 8.
Figure 10 shows a longitudinal cross-sectional view of the piston installed in the product dispenser of figure 8.
Figure 11 shows a longitudinal cross-sectional view of a fourth embodiment of the product dispenser of the present invention with the product dispenser in a locked condition.
Fig. 11a shows an enlarged view of the section VI in fig. 11.
Figure 12 shows a longitudinal cross-sectional view of the piston installed in the product dispenser of figure 11.
Figure 13 shows a longitudinal cross-sectional view of the cylinder installed in the product dispenser of figure 11.
Fig. 14 shows a longitudinal cross-sectional view of a product dispenser of a fifth embodiment of the present invention, wherein the product dispenser is in a locked condition.
Fig. 14a shows an enlarged view of the section VII in fig. 14.
Figure 15 shows a longitudinal cross-sectional view of the piston installed in the product dispenser of figure 14.
Figure 16 shows a longitudinal cross-sectional view of the cylinder (container) installed in the product dispenser of figure 14.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the preferred embodiments of the present invention are shown in the drawings only, and are not to be considered limiting of the scope of the invention. Various obvious modifications, variations and equivalents may be made to the present invention by those skilled in the art based on the preferred embodiments shown in the drawings, and features in different embodiments described below may be combined in any way without contradiction, and all of them are within the scope of the present invention.
< first embodiment >
Figures 1-4 b illustrate the construction of a product dispenser 100 and its included piston 130 and cylinder 140 according to a first embodiment of the present invention. Wherein the piston 130 and cylinder 140 are preferably made of plastic.
As shown in fig. 1 and 2, the product dispenser 100 includes a ram 110 and a piston rod 120, the piston rod 120 being attached to a lower end of the ram 110. The piston rod 120 is extended into the cylinder 140, and the piston 130 is connected to the lower end of the piston rod 120. When the outer race of the piston 130 contacts the inner wall of the cylinder 140, a seal is formed between the piston 130 and the cylinder 140.
< cylinders >
Fig. 3 shows a cross-sectional view of the cylinder 140 mounted on the product dispenser 100 shown in fig. 1, and fig. 3a shows an enlarged view of portion III of fig. 3.
As shown in fig. 3, the cylinder 140 includes a cylinder bore, a body portion 141 of which has a first inner diameter D. Also, in the present invention, a release ring 142 is further provided in the cylinder bore, the release ring 142 having a second inner diameter D1, the second inner diameter D1 being greater than the first inner diameter D of the body portion 141. Preferably, a transition 143 is provided between the relief ring 142 and the body portion 141 to achieve a smooth transition between the relief ring 142 and the body portion 141, as shown in the enlarged view of fig. 3 a. The transition 143 may take a variety of forms, such as a chamfer, a radius, and the like.
< piston >
Fig. 4a illustrates a front view of the piston 130 in the product dispenser 100 of fig. 1, and fig. 4b illustrates a cross-sectional view of the piston 130. As shown, the piston 130 mounted on the product dispenser 100 includes an upper outer race 131 and a lower outer race 132,
further, the piston 130 includes at least one seal therein that forms an interference fit with the body portion 141 of the cylinder bore to form a seal between the piston 130 and the cylinder 140. Specifically, the sealing portion of the piston 130 may have the maximum outer diameter D2, and the sealing portion may be formed on the upper outer ring 131, the lower outer ring 132, or both the upper outer ring 131 and the lower outer ring 132.
To effect a seal, the maximum outer diameter D2 of the sealing portion is greater than the first inner diameter D of body portion 141. Further, preferably, the maximum outer diameter D2 is less than the second inner diameter D1 of the bail 142. Thus, when the portion of the piston 130 having the maximum outer diameter D2 contacts the portion of the body portion 141 having the first inner diameter D, there is an interference fit between the piston 130 and the cylinder 140 to form a seal, and when the portion of the maximum outer diameter D2 of the piston 130 contacts the release ring 142 having the second inner diameter D1, the portion of the piston 130 is in an uncompressed state.
< working principle >
The operation of the product dispenser 100 of the present invention will now be described in detail with reference to figures 1, 1a, 2 and 2 a.
The product dispenser 100 is shown in a locked state in fig. 1. At this time, the ram 110 is in a depressed state, and is locked in the depressed state, for example, by a screw connection between the ram 110 and the cylinder head 150 or the like. Generally, when the product dispenser 100 is in the locked state, the product is in its stored state, such as during storage, transport, and sale of the product. Thus, the locked state of the product dispenser 100 may also be referred to as its storage state.
At this time, the piston 130 is pressed at its formed lowermost end along with the piston rod 120. Also, as best shown in the enlarged view of fig. 1a, in this locked state, at least the lower outer ring 132 of the piston 130, and in particular the seal portion of the lower outer ring having the largest outer diameter D2, is located in the relief ring 142 in the cylinder bore. Since the maximum outer diameter D2 of the sealing portion of the lower outer ring 132 is smaller than the second inner diameter D1 of the release ring 142, the lower outer ring 132 of the piston 130 is in an uncompressed state.
Preferably, the upper outer ring 131 and the lower outer ring 132 of the piston 130 are both at the release ring 142 of the cylinder 140, so that the entire piston 130 is in an uncompressed state.
When the consumer unlocks the ram 110, for example by turning the ram 110, as shown in fig. 2, the piston 130 moves upward with the piston rod 120 under the action of a biasing mechanism (e.g., a spring) to activate the product dispenser 100, causing the product dispenser 100 to begin to enter a use state.
As shown more clearly in the enlarged view of fig. 2a, in the use condition, both the upper outer ring 131 and the lower outer ring 132 of the piston 130 are in contact with the body portion 141 of the cylinder bore. At this time, since the maximum outer diameter D2 of the piston 130 is greater than the first inner diameter D of the body part 141, in a use state after starting activation, including during the process that the ram 110 is pressed down to dispense a product and the ram 110 rebounds due to the removal of the pressing force, the sealing portion of the piston 130 and the body part 141 of the cylinder bore are in an interference fit state, thereby forming a seal between the piston 130 and the cylinder 140 so that the product can be normally pumped out.
With the product dispenser 100 of the above construction and its operating principles in mind, modifications may be made without affecting the achievement of the basic objects of the invention and, therefore, remain within the scope of the invention. For example, the maximum outer diameter D2 need not be less than the second inner diameter D1, but may be slightly larger than the second inner diameter D1. In this case, when the product dispenser 100 is in the locked condition with the seal of the piston 130 in the release ring 142, the seal of the piston 130 is compressed by the release ring 142 such that its maximum outer diameter D2 is compressed to be the same as the second inner diameter D1. In this case, even if the piston 130 yields due to long-term compression, its final deformed outer diameter is the same as the second inner diameter D1, but is still larger than the first inner diameter D. Thus, when the product dispenser 100 is moved from the locked condition to the use condition, a seal is still formed between the piston 130 and the body portion 141 of the cylinder bore to maintain the effectiveness of the product dispenser 100 since the outer diameter of the piston 130 after yielding is still greater than the first inner diameter D of the body portion 141.
It will thus be seen that the basic concept of the present invention is to form a relief ring 142 having a larger internal diameter in the cylinder bore so as to be able to maintain the maximum external diameter D2 of the sealing portion of the piston 130 greater than the first internal diameter D of the body portion 141 in the locked condition of the product dispenser 100, thereby ensuring that an interference fit can be formed between the sealing portion of the piston 130 and the body portion 141 of the cylinder bore during use so as to maintain the function of the product dispenser 100 in effect.
The locked state of the product dispenser 100 (e.g., locking ram 110) may also be achieved by other means besides the threaded connection described above, such as a snap fit or the like. Further, where a threaded connection is employed, threaded connections may also be provided at various locations on the product dispenser 100, such as between the ram and the socket, between the ram and the integrated socket-cylinder head, between a piston rod connected to the ram and the socket/cylinder head, and so forth.
In a preferred construction, the seal of the piston 130 can only enter the position of the release ring 142 when the product dispenser 100 is in the locked condition, and the seal of the piston 130 does not enter the release ring 142 when the product dispenser 100 is in the use condition, including during the entire stroke of the piston 130 to pump product.
< second embodiment >
Figures 5-7 illustrate a second embodiment of the product dispenser 200 of the present invention. The product dispenser 200 includes a piston 230 and a cylinder 240.
The product dispenser 200 of the second embodiment is the same as the product dispenser 100 of the first embodiment, and is of the down-lock type, i.e., in the locked condition, the piston is at the lowermost end of its travel.
Fig. 6 shows a cross-sectional view of the cylinder 240. Wherein a release ring 242 is formed at a lower portion of a cylinder bore of the cylinder 240, and a first inner diameter D of a body portion 241 of the cylinder bore is smaller than a second inner diameter D1 of the release ring 242.
As shown in fig. 7, in the second embodiment, the piston 230 includes only a lower outer ring, rather than an upper outer ring as in the piston 130 of the first embodiment. The sealing portion of the piston 230 has a maximum outer diameter D2. The maximum outer diameter D2 is preferably less than the second inner diameter D1, but greater than the first inner diameter D. Of course, as can be seen from the above disclosure regarding the first embodiment, in the second embodiment, the piston 230 may also include an upper outer ring, and the maximum outer diameter D2 may also be equal to or greater than the second inner diameter D1, without affecting the effect of the present invention.
Further, preferably, in the second embodiment, the piston 230 is integrally formed on the piston rod 220.
Similar to the first embodiment, when the product dispenser 200 is in the locked condition, the piston 230 is at the lowermost end of its travel with the sealing portion of the piston 230 at the position of the release ring 242, as shown in the enlarged view of FIG. 5 a. Thus, in the locked state, the sealing portion of the piston 230 is in an uncompressed state, thereby avoiding yield deformation under long-term storage.
And when the product dispenser 200 is unlocked and brought into use, the sealing portion of the piston 230 contacts the portion of the cylinder 240 having the first inner diameter D, thereby forming a seal between the piston 230 and the cylinder 240.
< third embodiment >
Figures 8-10 illustrate a third embodiment of the product dispenser 300 of the present invention. As shown in fig. 8, the product dispenser 300 includes a piston 330 and a cylinder 340.
Fig. 9 shows a cross-sectional view of the cylinder 340. In the third embodiment, the product dispenser 300 is of the type having an up-lock condition, i.e., in which the piston 330 is at the uppermost end of its travel. Accordingly, a relief ring 342 having a second inner diameter D1, which is D1 larger than the first inner diameter D of the body portion 341 of the cylinder bore of the cylinder 340, is provided at the upper portion of the cylinder bore of the cylinder 340.
Fig. 10 shows a cross-sectional view of the piston 330, wherein the sealing portion of the piston 330 has a maximum outer diameter D2 that is greater than the first inner diameter D of the cylinder body 341, and preferably less than the second inner diameter D1 of the release ring 342. In the third embodiment, the piston 330 may have upper and lower outer rings as in the piston 130 of the first embodiment, or may have only the upper outer ring.
When the product dispenser 300 is in the locked condition, the piston 330 is at the uppermost end of its travel and its seal having the largest outer diameter D2 is at the position of the release ring 342, so that in the locked condition, the piston 330 is in an uncompressed condition, as shown in FIG. 8 a.
When the product dispenser 300 is unlocked for use, the piston 330 moves downward and its seal leaves the release ring 342 and contacts the body portion 341 of the cylinder bore, thereby forming a seal between the piston 330 and the cylinder 340.
< fourth embodiment >
11-13 illustrate a fourth embodiment of the product dispenser 400 of the present invention. As shown in fig. 11, the product dispenser 400 includes a piston 430 and a cylinder 440.
The product dispenser 400 of the fourth embodiment is also of the top locking type, and therefore, as shown in fig. 11a, the release ring 442 is located at the upper portion of the cylinder 440, corresponding to the uppermost position of the stroke of the piston 430.
When the product dispenser 400 is in the locked condition, the piston 430 is at the uppermost end of its travel and its sealing portion with the largest outer diameter is at the position of the release ring 442, such that in the locked condition, the piston 430 is in an uncompressed condition, as shown in fig. 11 a.
When the product dispenser 400 is opened and brought into use, the piston 430 moves downward and its seal leaves the release ring 442 and contacts the body portion 441 of the cylinder bore, thereby forming a seal between the piston 430 and the cylinder 440.
< fifth embodiment >
Fig. 14-16 illustrate a fifth embodiment of a product dispenser 500 to which the principles of the present invention are applied. As can be seen from fig. 14, in the fifth embodiment, a container 540 for containing a product serves as a cylinder, and a piston 530 is slidably disposed in the container 540.
The piston 530 divides the internal volume of the container 540 into two parts, one of which is a part below the piston 530 that communicates with the outside air through the vent hole 543 in the bottom of the container 540, and the other of which is a part above the piston 530 that contains the product therein.
When the product is in an unused state, the product dispenser 500 is in a locked state with the seal of the piston 530 having the largest outer diameter in a position to release the ring 542 in the container 540. In the specific structure shown in fig. 14, the relief ring 542 is provided at a lower portion of the container inner bore 541, and preferably, the sealing portion of the piston 530 is formed at a lower outer ring of the piston 530. In this state, the maximum outer diameter in the sealing portion of the piston 530 is smaller than the inner diameter of the release ring 542, and thus the piston 530 is in an unpressurized state.
When the consumer opens the product dispenser 500 and begins to use the product, the piston 530 will move upward under the pumping action with its seal out of contact with the payout ring 542 and into contact with the body portion 541 of the container bore of the container 540. At this time, since the maximum outer diameter of the sealing portion of the piston 530 is greater than the inner diameter of the container inner hole 541, an interference fit is generated with the container 540, thereby forming a seal between the piston 530 and the container 540.
During the upward movement of the piston 530, the external air will enter the volume below the piston 530 through the vent hole 543 to compensate the negative pressure generated by the increase of the volume below the piston 530.
Claims (10)
1. A cylinder-piston assembly for a product dispenser, the product dispenser being convertible between a locked condition and an in-use condition, and the cylinder-piston assembly comprising a cylinder and a piston slidably disposed within the cylinder, a pumping action being produced by movement of the piston in the cylinder, characterized in that,
at least one loosening ring is formed in a cylinder inner hole of the cylinder, the other part of the cylinder inner hole except the loosening ring is a body part, the body part is provided with a first inner diameter, the loosening ring is provided with a second inner diameter, and the second inner diameter is larger than the first inner diameter;
the piston having at least one sealing portion, at least the sealing portion of the piston having a maximum outer diameter greater than the first inner diameter, thereby enabling an interference fit between the sealing portion of the piston and the body portion of the cylinder bore;
the sealing portion of the piston is within the release ring when the product dispenser is in the locked condition and the sealing portion of the piston is clear of the release ring into the body portion of the cylinder bore when the product dispenser is activated into the use condition to ensure that the interference fit between the sealing portion of the piston and the body portion of the cylinder bore is formed, and the sealing portion of the piston is located at the release ring within the cylinder only when in the locked condition and never reaches the position of the release ring when in the use condition.
2. The cylinder-piston assembly of claim 1 wherein said maximum outer diameter is equal to or less than said second inner diameter.
3. The cylinder-piston assembly of claim 1 wherein said maximum outer diameter is slightly larger than said second inner diameter.
4. The cylinder-piston assembly of claim 1 wherein a transition is provided between the release ring and the body portion of the cylinder bore.
5. The cylinder-piston assembly according to claim 4, wherein the transition portion is selected from at least one of the following structures: a bevel and a fillet.
6. The cylinder-piston assembly of claim 1 wherein said piston includes a lower outer race having said seal portion and said release ring is located in a lower portion of said cylinder such that said seal portion in said lower outer race is located in the position of said release ring when said product dispenser is in said locked condition.
7. The cylinder-piston assembly of claim 1 wherein said piston includes an upper outer race having said seal portion and said release ring is located at an upper portion of said cylinder, said seal portion in said upper outer race being located at a position of said release ring when said product dispenser is in said locked condition.
8. The cylinder-piston assembly of claim 1 wherein said piston includes at least one of an upper outer ring and a lower outer ring, said upper outer ring and said lower outer ring each having said seal, and said seal in said upper outer ring and/or said lower outer ring being located at the position of said release ring when said product dispenser is in said locked condition.
9. The cylinder-piston assembly of claim 1 wherein said cylinder-piston assembly is made of plastic.
10. A product dispenser, characterized in that it comprises a cylinder-piston assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610498390.9A CN107539611B (en) | 2016-06-29 | 2016-06-29 | Cylinder-piston assembly and product dispenser comprising a cylinder-piston assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610498390.9A CN107539611B (en) | 2016-06-29 | 2016-06-29 | Cylinder-piston assembly and product dispenser comprising a cylinder-piston assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107539611A CN107539611A (en) | 2018-01-05 |
| CN107539611B true CN107539611B (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610498390.9A Active CN107539611B (en) | 2016-06-29 | 2016-06-29 | Cylinder-piston assembly and product dispenser comprising a cylinder-piston assembly |
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| CN (1) | CN107539611B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646233A (en) * | 2002-04-19 | 2005-07-27 | 瓦卢瓦有限合伙公司 | Distribution pump for a liquid product |
| CN1958403A (en) * | 2006-11-13 | 2007-05-09 | 姚凡 | Cooking oil bottle with hand controlled air pump type oilout set |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5702031A (en) * | 1995-06-20 | 1997-12-30 | Emson, Inc. | Dispensing pump with priming feature |
| JP3691930B2 (en) * | 1996-07-29 | 2005-09-07 | 株式会社資生堂 | Container pump |
| JP3946411B2 (en) * | 2000-04-28 | 2007-07-18 | 株式会社吉野工業所 | Liquid jet pump |
| CN205998371U (en) * | 2016-06-29 | 2017-03-08 | 丁祥 | Steam-cylinder piston component and the dispenser including steam-cylinder piston component |
-
2016
- 2016-06-29 CN CN201610498390.9A patent/CN107539611B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646233A (en) * | 2002-04-19 | 2005-07-27 | 瓦卢瓦有限合伙公司 | Distribution pump for a liquid product |
| CN1958403A (en) * | 2006-11-13 | 2007-05-09 | 姚凡 | Cooking oil bottle with hand controlled air pump type oilout set |
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| Publication number | Publication date |
|---|---|
| CN107539611A (en) | 2018-01-05 |
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