JPS5849401Y2 - vaporizer air vent - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an air vent device for a vaporizer.

Conventionally, sliding throttle valve type carburetors have generally used an air vent that is open to the atmosphere, but in order to prevent water from flowing in from this air vent during rain or car washing, an L-shaped air vent hole is installed at the entrance of the air vent hole. It was necessary to install a nipple or a pipe with a hole on one side, and to make the air vent face downward.

The present invention is directed to a structure in which such parts such as nipples are eliminated and a downwardly directed atmospheric opening is simply formed.

Examples will be described below with reference to the drawings.

Figure 1 is a longitudinal cross-sectional view of a conventional sliding throttle valve type carburetor, where 1 is the carburetor body, 2 is the sliding throttle valve, 3 is the jet needle, 4 is the needle jet, 5 is the main jet, and 6 is the float. , 7 is a throttle valve return spring, 8 is a cap, 9 is a cable end, 10 is an air vent passage, 11 is an air vent pine, and 12 is an atmosphere opening port.

As is clear from the above, the air vent pipe 11 is press-fitted into the main body with the atmosphere opening facing downward to prevent water from entering the float chamber.

FIG. 12 shows an embodiment of the present invention, and the same parts as in FIG. 1 are designated by the same reference numerals.The cap 8 in FIG. The present invention is applied when using a flange-type cap that also serves as a support for attaching a starter device.

That is, the opening at the upper end of the main body 1 forms a flange IA, and the cap 13 is attached to this flange and fixed with screws 14.

The starter device includes a starter valve 15, a spring 16, a starter rod 11, a starter knob 18, and a starting fuel passage 19, which are generally used.

In this type of starter device, if the cap 8 is of a screw-in type as shown in Fig. 1, it is normal to provide a boss part on the main body 1 and attach it to this, but the carburetor becomes smaller and
This is not possible due to restrictions on sacrificial mounting, and the cap 13 is of a flange type, and this cap is sometimes constructed to also serve as support for the starter rod.

In this case, using the extended periphery of the cap 13,
By providing an air vent passage, a downward opening to the atmosphere can be obtained without the need for the above-mentioned pipe or the like.

That is, the air vent passage 10 provided in the main body 1 is extended to the upper end, and the air vent passage 10 is provided in the flange portion 1A of the main body.
2 are provided, and both are communicated through a recess 19 provided in the cap 13.

Note that the recess 19 can also be provided on the main body side and communicated with it.

In this way, not only can the above-mentioned water intrusion be naturally prevented, but also the air vent passage 10, recess 19, etc. can be formed at the same time during tie-casting molding, eliminating the need for machining and reducing the cost by eliminating the need for pipes, nickel, etc. This contributes to the reduction.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a conventional sliding throttle valve type carburetor, and FIG. 2 is a vertical sectional view of a sliding throttle valve type carburetor showing an embodiment of the present invention. 1... Carburetor body, 8, 13... Cap, 10.
...Air vent passage, 12...Atmospheric release port, 15.
・Starter valve.

Claims (1)

[Scope of utility model registration request] An air vent passage 10 provided in the carburetor body 1, an atmosphere opening port 12 provided in the flange portion 1A, and a recess 19 for communicating these are provided on the cap 13 or the mating surface of the carburetor body 1. An air vent for a carburetor, characterized in that the atmosphere opening port 12 is oriented downward.