Zama Japan Kabushiki Kaisha

Hiroyuki Oka

Takumi Nonaka

Hideki Watanabe

Toshiyuki Kuyo

Kazunori Tabata

An improved primary pump for a carburetor is provided. The primary pump has a reduced cost and reduced space construction. The primary pump includes: a flexible cap having a cavity; an inlet open to the cavity of the flexible cap; an inlet side path fluidly coupled to the inlet; an inlet side check valve disposed in the inlet side path; an outlet open to the cavity of the flexible cap; an outlet side path fluidly coupled to the outlet; and an outlet side check valve disposed on the outlet side path, wherein at least one among the inlet side check valve and the outlet side check valve comprises a flap formed in a pump diaphragm of a fuel pump of the carburetor.

Primary pump and carburetor using the same

An attachment structure for a solenoid valve which can be stably attached to and removed from a carburetor unit with a single movement and without increasing the number of parts. A rod-like supporting portion is disposed a predetermined distance away from a surface of a carburetor unit and extending in a direction substantially perpendicular to a direction of and installed near an opening in the surface of the carburetor unit. A cylindrical engaging portion extends from a circumferential face of a cylindrical body fitted on the solenoid valve substantially perpendicular to an axial line of the rod-like supporting portion, and forms a groove-like engagement portion which is narrower in diameter than the rod-like supporting portion, whereby the engaging portion, via the groove-like engagement portion, is coupled to and supported by rod-like supporting portion when an insertion portion of the solenoid valve is inserted into the opening.

Attachment structure for solenoid valve to carburetor unit

A throttle valve device ideal for small, inexpensive implements is provided. The throttle valve device having a damping member for slowly closing a throttle valve. The throttle valve device () has a throttle valve () that is fixed to a throttle shaft () pivotably supported in an air intake passage () and that is urged towards the closed direction, the throttle valve () adapted for adjusting the amount of air passing through the air intake passage (). A through-bore () penetrating a shaft bore of the throttle shaft () is formed in a body, and a damping member () having frictional capabilities is inserted into and supported in the through-bore () in a state of pressing against the throttle shaft () inserted through the shaft bore ().

Growing community of inventors

Takizawa-mura, Japan

Hiroyuki Oka