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; a plurality of 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 in said valve body is comprised of elastic materials; and a cutting joint being elastic and being placed on said valve body, said cutting joint extending through both sides of said valve body.

2. The breather valve, according to claim 1, further comprising a groove, said cutting joint being a groove cutting joint within said groove.

3. The breather valve, according to claim 1, further comprising a groove, said cutting joint being a groove cutting joint and laying on said groove.

4. The breather valve, according to claim 3, wherein said groove has a curved surface.

5. The breather valve, according to claim 1, further comprising: a bulging part being hollow, so as to form a hollow space and having a hole on said valve body extending through the two sides of said valve body, wherein said cutting joint forms said hole of said bulging part linking said hollow space to the two sides of said valve body.

6. The breather valve, according to claim 5, wherein said bulging part is shaped as a wedge.

7. The breather valve, according to claim 6, wherein said bulging part is made integral with said valve body.

8. The breather valves, according to claim 5, wherein at least one of the one-way air inlet and outlet components is comprised of said bulging part, and wherein at least another of the one-way air inlet and outlet components is comprised of a groove having a respective groove cutting joint.

9. 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.

10. The breather valve, according to claim 9, wherein said bulging part is installed integral with said valve body.

11. The breather valve, according to claim 9, wherein said bulging part is installed on an edge of said valve body.

12. A tank cap, comprising: a breather valve, according to claim 1; and a cap body.

13. A tank, comprising: a tank cap according to claim 12; and a tank body.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) FIG. 1 is a front elevation view of the breather valve in executing example I.

(2) FIG. 2 is a sectional view across line A-A in FIG. 1.

(3) FIG. 3 is an enlarged and isolated sectional view of section B in FIG. 2.

(4) FIG. 4 is a back elevation view of FIG. 1.

(5) FIG. 5 top plan view of FIG. 1.

(6) FIG. 6 is a front elevation view of the structure of a breather valve in executing example II.

(7) FIG. 7 is a sectional view across line A-A in FIG. 6.

(8) FIG. 8 is a top plan view of FIG. 6.

(9) All numbers in figures represents:

(10) 1. Valve body; 2. cutting joint; 3: groove cutting joint; 4: bulging assembling; 5: bulging part; 6: hollow space; 7: groove.

DETAILED DESCRIPTION OF THE INVENTION

(11) Following is the description for principles and features of this invention on the basis of figures. All examples are only used for explaining this invention.

Executing Example 1

(12) In FIG. 1 and FIG. 5, a breather valve can be used in a tank cap. The breather valve includes the valve body 1 that is made of elastic materials. Valve body 1 is in a shape of a circular panel. On an end closer to an edge, a ring bulging assembling 4 can be placed. Here, the elastic material commonly refers to rubber material.

(13) On one side of the valve body 1, a bulging part 5 is installed as the air inlet. The one side faces the inside of tank, after installment of the breather valve.

(14) The bulging part is in the shape of wedge that is integrated with the valve body 1 and possesses hollow space 6. On the valve body 1, the cutting joint 2 is the hole that goes throughout two sides of the valve body 1 and links to the air outside on one side of the valve body with the 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 or cutting joint 2 will open. On the contrary, the side of the valve body 1 with the cutting joint or 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.

(15) There are two grooves 7 on sides of valve body 1. The grooves 7 and the bulging part 5 are on the same side of valve body 1. Each bottom of grooves 7 is curvy, or each bottom of grooves 7 has the groove 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.

(16) 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 as more than one bulging part. Both the placement of bulging part 5 and groove 7 can be put in different places to meet the demand.

Execution Example 2

(17) As shown on FIG. 6 and FIG. 8, the only difference is the placement of the bulging assembling 4. In real usage, the bulging assembling 4 can be arranged and placed as required.

(18) The tank cap installed with the breather valve mentioned above, should assure air tightness during operation so to prevent the gasoline from venting into the air, which will lead to pollution when the pressure is unbalanced. Incision or cutting joint 2 and groove cutting joint 3 are each closed to avoid leaking when the tank tilted or upside down due to severe vibration or being bumped during operation. Even being tilted or being placed upside down for a long time, which can cause the cutting joint to open when the pressure inside of tank increases, active carbon can absorb little leaking oil for safety and avoid the risk derived from leaking.

(19) Two execution examples mentioned above are only limited to illustration of structure and principle of breather valve. The bulging part of the breather valve and groove cutting joint in each groove 7 could be set as required. For example: the cutting joint 2 and bulging part 5 are not limited to being integral with the valve body 1. The valve body 1 can also have a hole for installment of an insert to place the bulging part and cutting joint 2.

(20) Additionally, groove 7 and bulging part 5 can both be combined and separated. For example: the one-way air inlet on valve body 1 can be a groove, and the one-way air outlet on the valve body 1 can also be a groove, only assuring that these grooves are be placed on different sides of the two sides of the valve body.

(21) One-way air inlet and the one-way air outlet can also both be bulging parts 5 mentioned above. The bulging part 5 possesses the feature of a one-way air inlet. Thus, bulging parts can be placed on different sides of two sides of the elastic valve body as the one-way air inlet and one-way air outlet.

(22) Moreover, when groove 7 exhausts gas to decrease pressure and the bulging part 5 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.

(23) Each cutting joint or elastic slice can also serve for pressure increasing and bulging part for pressure decreasing. Both the cutting joint 2 and bulging part 5 should be placed on the same side of the valve body, and the bulging part 5 should be put toward the direction of exhaustion, which is on top of the tank.

(24) And another thing needs to be claimed is that breather valve is not limited to a tank, but also for devices in health care and gasoline equipment for petrochemical industry. All things 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 included in the scope of this invention.