BREATHER VALVE

Abstract

The mechanical breather valve includes a valve body, on which is installed one-way air inlet and outlet components. A tank, for environmental protection, is fitted with the breather valve and closed so that no volatile gas will be exhausted, when the pressure within is balanced with the outside. When the pressure within is negative, the one-way air inlet hole will draw air from outside to keep the balance of pressure. When the pressure within is increased, one-way air outlet hole will exhaust the additional air. When the tank is tilted or placed upside down, the breather valve can prevent the oil from flowing out of the tank for safe usage.

Claims

1. A breather valve, comprising: a valve body; and several one-way air inlet and outlet components installed on said valve body, the components opening when pressure balances two sides of said valve body, wherein a flow passage is comprised of elastic materials.

2. The breather valve, according to claim 1, further comprising an elastic part, being an elastic slice on said valve body, said elastic slice cut having a joint-cutting through both sides of said valve body.

3. The breather valve, according to claim 2, wherein said elastic slice has grooves, said joint-cutting being within said grooves.

4. The breather valve, according to the claim 2, wherein said elastic slice is comprised of a groove, said joint-cutting laying on said groove.

5. The breather valve, according to claim 4, wherein said groove has a curved surface.

6. The breather valve, according to claim 1, further comprising: elastic bulging components on said valve body, wherein a bulging part has an inner being hollow, wherein a hole on said valve body extends through the two sides of said valve body and a hollow space, and wherein said bulging part has an incision linking said hollow space.

7. The breather valve, according to claim 6, wherein said bulging part is comprised of a wedge.

8. The breather valve, according to claim 7, wherein said bulging part is made integral with said valve body.

9. The breather valves, according to claim 1, are featured with the arbitrary combination of one-way air inlet or outlet components that are composed with elastic slice or bulging part or the combination of both.

10. The breather valve, according to claim 1, wherein said valve body is comprised of a circular slab, and wherein a ring bulging part is set on one end of said valve body.

11. The breather valve, according to claim 10, wherein a bulging part is installed integral with said valve body.

12. The breather valve, according to claim 10, wherein said bulging part is installed on an edge of said valve body.

13. A tank cap, comprising: a breather valve, according to claim 1, being in one of upper technical plan within the cap.

14. A tank, comprising: tank cap according to claim 13, being installed on the tank in the upper technical plans.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

[0037] FIG. 1 is a front elevation view of the structure of a breather valve in executing example I.

[0038] FIG. 2 is a sectional view across line A-A in FIG. 1.

[0039] FIG. 3 is an enlarged and isolated sectional view of section B in FIG. 2.

[0040] FIG. 4 is a back elevation view of FIG. 1.

[0041] FIG. 5 top plan view of FIG. 1.

[0042] FIG. 6 is a front elevation view of the structure of a breather valve in executing example II.

[0043] FIG. 7 is a sectional view across line A′-A′ in FIG. 6.

[0044] FIG. 8 is a top plan view of FIG. 6.

[0045] All numbers in figures represents:

[0046] 1. Valve body; 2. Incision; 3: cutting joint; 4: bulging assembling; 5: bulging part; 6: hollow space; 7: groove.

DETAILED DESCRIPTION OF THE INVENTION

[0047] Following is the description for principles and features of this invention on the basis of figures. All examples is only used for explaining this invention.

EXECUTING EXAMPLE 1

[0048] In FIG. 1 and FIG. 5, a kind of breather valve used for tank cap, includes the valve body 1 that is made of elastic materials. Valve body 1 is in shape of circular panel, on one end that is more close to the edge of which places a ring bulging assembling 4. Here, the elastic material commonly refers to rubber material.

[0049] On one side of the valve body 1 installs a bulging part 5 for air inlet. The side faces the inside of tank after installment of breather valve.

[0050] The bulging part is in shape of wedge that is integrated with valve body 1 and possesses hollow space 6. One the valve body 1 is the hole that goes throughout two ends and links to the air outside with hollow space 6. Cutting joint 2 is on the top of bulging part 5. When the pressure on the side of valve body 1 installed with bulging part 5 is lower than the other side, the incision will open. On the contrary, the side of incision 2 in shape of wedge will be squeezed and fitted after extrusion under the effect of differential pressure so that to realize the function of one-way air inlet.

[0051] There are two grooves 7 on sides of valve body 1. The grooves 7, like the bulging part 5, are on the same side of valve body 1. The bottom of grooves 7 is curvy or, on which places the cutting joint that goes throughout the two sides of valve body 1. The bottom surface of grooves is large so that it can burden a larger weight and is convenient for one-way pressure decreasing. Besides, the thickness of grooves possesses good transitivity that makes a good operation. The depth of groove should be considered according to the demand and the field it uses to achieving the flexibility and elastic material choosing.

[0052] Two grooves 7 are placed on two sides of bulging part 5, which is only limited for this execution example. Technical persons in charge of this field can set one or more than 2 to meet the demand for satisfying pressure exhaustion. Similarly, the bulging part 5 also could be designed more. Both the placement of bulging part 5 and groove 7 can be put in different places to meet the demand.

EXECUTION EXAMPLE 2

[0053] As shown on FIG. 6 and FIG. 8, the only difference is the place of bulging assembling 4. In real usage, the bulging assembling 4 can be arranged and placed under demand.

[0054] The tank cap installed with the breather valve mentioned above, should assure air tightness during operation so that prevent the gasoline from violation into the air, which will lead to pollution when the pressure is unbalanced. Incision 2 and cutting joint 3 is closed for avoid leaking when tank tilting or be upside down because of severe vibration or bumped condition during operation. Even be tiled or be placed upside down for a long time, which causes the cutting joint opens when the pressure inside of tank increasing, active carbon can absorb little leaking oil for safety and avoiding the risk derived from leaking.

[0055] Two execution examples mentioned above are only limited to illustration of structure and principle of breather valve. The bulging part on breather valve and elastic slice with groove 7 could be set under demand. For example: elastic slice and bulging part 5 is not limited to the integration structure with valve body 1, but also be used as hole for installment to place bulging part and elastic slice.

[0056] Besides, groove 7 and bulging part 5 can be both combined and separated. For example: one-way air inlet and outlet part on valve body 1 are all grooves on the elastic slice mentioned above, only assuring that these grooves are be placed on different side of the two side of the valve body.

[0057] One-way air inlet and outlet part can also be the bulging part 5 mentioned above. The bulging part 5 possesses the feature of one-way air inlet. Thus, it can be placed on different sides of two sides of the elastic slice on one-way air inlet and outlet part.

[0058] Moreover, when groove 7 exhausts gas to decrease pressure and bulging part inhales air to increase pressure, the bulging part should be placed towards the inside of tank, and the groove 7 on elastic slice and bulging part 5 should be on the same side of valve body. This structure is the same as the execution example 1.

[0059] Elastic slice can also serves for pressure increasing and bulging part for pressure decreasing. Both the elastic slice and bulging part should be placed on the same side of vale body, and bulging part 5 should be put toward the direction of exhaustion, which is on top of tank.

[0060] And another thing needs to be claimed is that breather valve is not limited to tank, but also for health care and gasoline equipment for petrochemical industry. All thing mentioned above are some good execution examples of this invention, but no limited to the version. Under the spirit and within the principle of this invention, any amendment, replacement and revision is including to the protective area of this invention.