US 7,243,829 B2 · Combustion power tool

Abstract

A combustion power tool having a first combustion chamber, a second combustion chamber, an igniter, a partition, and a driving mechanism. Flammable gas is introduced or charged into the first and second combustion chamber. The igniter is disposed in the first combustion chamber. The partition separates the first combustion chamber from the second combustion chamber. Communication holes are formed in the partition at different angles with respect to the longitudinal direction of the first combustion chamber. The communication holes communicate the first combustion chamber with the second combustion chamber. The driving mechanism performs a predetermined processing work by utilizing an explosive combustion pressure. The combustion pressure is generated when flammable gas in the first combustion chamber is explosively burned by the igniter and when the burning front of the flammable gas in the first combustion chamber propagates to the second combustion chamber via the communication holes of the partition thereby explosively burning flammable gas in the second combustion chamber.

Claims26

Dependent claims

A combustion power tool, comprising:

a first combustion chamber and a second combustion chamber into which flammable gas is charged,
an igniter disposed in the first combustion chamber,
a dome shaped partition that separates the first combustion chamber from the second combustion chamber,
communication holes formed in the dome shaped partition at different angles with respect to the longitudinal direction of the first combustion chamber, wherein the communication holes communicating the first combustion chamber with the second combustion chamber, and
a driving mechanism that performs a predetermined processing work by utilizing a combustion pressure, the combustion pressure being generated when flammable gas in the first combustion chamber is burned by the igniter and when the burning front of the flammable gas in the first combustion chamber propagates to the second combustion chamber via the communication holes of the dome shaped partition and burns flammable gas in the second combustion chamber, wherein when the flammable gas in the first combustion chamber is burned, the burning front in the first combustion chamber reaches each of the communication holes substantially at the same time.

2 more elements

A combustion power tool, comprising:

a first combustion chamber and a second combustion chamber into which flammable gas is charged,
an igniter disposed in the first combustion chamber,
a dome shaped partition that separates the first combustion chamber from the second combustion chamber, wherein the dome shaped partition is provided to move toward the second combustion chamber,
communication holes that are formed in the dome shaped partition and serve to communicate the first combustion chamber with the second combustion chamber, and
a driving mechanism that is actuated to perform a predetermined processing work by utilizing a combustion pressure, the combustion pressure being generated when flammable gas in the first combustion chamber is burned by the igniter and when the burning front of the flammable gas in the first combustion chamber propagates to the second combustion chamber via the communication holes of the dome shaped partition and burns flammable gas in the second combustion chamber,
wherein combustion gas burned in the second combustion chamber is introduced into the first combustion chamber when the dome shaped partition is moved to the second combustion chamber so that the capacity of the second combustion chamber is reduced, and combustion gas burned within the second combustion chamber is discharged to the outside together with combustion gas burned within the first combustion chamber.

3 more elements

Dependencies are inferred from the claim text.

Combustion power tool

Life of this patent

Combustion power tool

Life of this patent

Abstract

Claims26