Engine
AssigneeMakita Corporation
InventorsMasaki SUGIYAMA, Tetsuya HASEGAWA
Life of this patent
Estimating the term…
Abstract
An engine includes a crank chamber in which pressure fluctuation occurs and a carburetor including a diaphragm fuel pump. The diaphragm fuel pump includes a pump chamber configured to suck in and eject fuel and a diaphragm chamber to which a pressure that drives the pump chamber is supplied. The diaphragm chamber and the crank chamber communicate with one another in a state in which a negative pressure is created in the crank chamber.
Claims10
An engine comprising:
- a crank chamber in which pressure fluctuation occurs;
- and a carburetor including a diaphragm fuel pump, wherein:
- the diaphragm fuel pump includes:
- a pump chamber configured to suck in and eject fuel;
- and
- a diaphragm chamber to which a pressure that drives the pump chamber is supplied;
- and
- the diaphragm chamber and the crank chamber communicate with one another in a state in which a negative pressure is created in the crank chamber.
The engine according to claim 7 claim 1, further comprising a communicating path configured to allow communication between the diaphragm chamber and the crank chamber,
- wherein an orifice is formed in an opening of the communicating path in the crank chamber side.
Dependencies are inferred from the claim text.