US 2016/0186692 A1Published application

Carburetor

AssigneeZama Japan Kabushiki Kaisha

InventorDaisuke Suzuki

Life of this patent

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Abstract

A carburetor provided with a cap that prevents removal thereof by willful and forcible over-operation or destruction by a user, that is easily assembled without increasing the number of components, and that is a control means of an adjustment valve of a fuel flow rate concomitant to a carburetor of a conventional utility engine. A sleeve 2 extends from or is integrally connected to a carburetor main body 1 and is disposed to surround the limit caps 6, 7, includes spaces 23, 24 for rotating arm pieces 611, 711 attached to the limit caps 6, 7.

Claims20

Dependent claims

A carburetor for supplying fuel to a utility engine comprising:

a carburetor main body that has a high speed-side fuel channel and a low speed-side fuel channel;
a high speed-side adjustment hole and a low speed-side adjustment hole provided adjacent each other in the carburetor main body in communication with each fuel channel;
a high speed-side adjustment valve and a low speed-side adjustment valve movably connected in an axial direction by being screwed in each adjustment hole for individually manually adjusting effective surface areas of the high speed-side fuel channel and the low speed-side fuel channel;
a high speed-side limit cap and a low speed-side limit cap including
a cap side locking portion connected as a control means to a valve-side locking portion provided on the high speed-side adjustment valve and the low speed-side adjustment valve for integral operation in a circumferential direction of the high speed-side adjustment valve and the low speed-side adjustment valve by mating with the valve-side locking portion,
an axial direction disengagement prevention portion for integrating an operation in an axial direction by mating in an axial direction with a first step or a second step of the high speed-side adjustment valve and the low speed-side adjustment valve, and
an arm piece that is disposed protruding in a circumferential direction and limits a rotation range by contacting another component;
and
a sleeve that is disposed in a position surrounding an outer periphery of each limit cap covering each adjustment valve and integrally connected to the carburetor main body;
the sleeve comprising:
a rotation space formed in a cylindrical shape for the arm piece to rotate in the sleeve;
and
a limit cap positioning groove in communication with the rotation space from a surface of the sleeve and enabling movement of each limit cap to a position in a second state, by inserting the arm piece therethrough, the limit cap position groove being formed in a shape that prevents rotation of each limit cap in the circumferential direction when each limit cap is in a position of a first state.

10 more elements

Dependencies are inferred from the claim text.

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Abstract

A carburetor for supplying fuel to a utility engine comprising:

a carburetor main body that has a high speed-side fuel channel and a low speed-side fuel channel;
a high speed-side adjustment hole and a low speed-side adjustment hole provided adjacent each other in the carburetor main body in communication with each fuel channel;
a high speed-side adjustment valve and a low speed-side adjustment valve movably connected in an axial direction by being screwed in each adjustment hole for individually manually adjusting effective surface areas of the high speed-side fuel channel and the low speed-side fuel channel;
a high speed-side limit cap and a low speed-side limit cap including
a cap side locking portion connected as a control means to a valve-side locking portion provided on the high speed-side adjustment valve and the low speed-side adjustment valve for integral operation in a circumferential direction of the high speed-side adjustment valve and the low speed-side adjustment valve by mating with the valve-side locking portion,
an axial direction disengagement prevention portion for integrating an operation in an axial direction by mating in an axial direction with a first step or a second step of the high speed-side adjustment valve and the low speed-side adjustment valve, and
an arm piece that is disposed protruding in a circumferential direction and limits a rotation range by contacting another component;
and
a sleeve that is disposed in a position surrounding an outer periphery of each limit cap covering each adjustment valve and integrally connected to the carburetor main body;
the sleeve comprising:
a rotation space formed in a cylindrical shape for the arm piece to rotate in the sleeve;
and
a limit cap positioning groove in communication with the rotation space from a surface of the sleeve and enabling movement of each limit cap to a position in a second state, by inserting the arm piece therethrough, the limit cap position groove being formed in a shape that prevents rotation of each limit cap in the circumferential direction when each limit cap is in a position of a first state.

10 more elements