Combustion-type power tool
AssigneeHitachi Koki Co., Ltd.
InventorYoshitaka Akiba
Life of this patent
Estimating the term…
Abstract
A combustion-type power tool includes a cylinder, a piston, a head, a combustion chamber frame, an ignition unit, a trigger, a control member. The combustion chamber frame is abuttable on the head to provide a combustion chamber in cooperation with the head and the piston. The trigger is operated by a user for driving the fastener into a workpiece. The control member detects that the combustion chamber has been provided and the trigger has been operated, and allows the ignition unit to ignite the combustible gas only when the control member detects that both the combustion chamber has been provided and the trigger has been operated.
Claims18
A combustion-type power tool comprising:
- a cylinder defining an axial direction;
- a piston slidably disposed in the cylinder and reciprocally movable in the axial direction;
- a head opposed to the piston;
- a combustion chamber frame movable in the axial direction, the combustion chamber frame being abuttable on the head to provide a combustion chamber in cooperation with the head and the piston;
- an ignition unit that ignites combustible gas injected into the combustion chamber, wherein the piston provides a fastener with a striking force when the combustion chamber broadens in accordance with the combustion of the combustible gas injected into the combustion chamber;
- a trigger that is operated by a user for driving the fastener into a workpiece;
- and
- a control member that detects that the combustion chamber has been provided and the trigger has been operated, and allows the ignition unit to ignite the combustible gas only when the control member detects that both the combustion chamber has been provided and the trigger has been operated.
A combustion-type power tool comprising:
- a striking member in which a combustion chamber can be provided, the striking member that provides a fastener with a striking force when the combustion chamber broadens in accordance with combustion of combustible gas injected into the combustion chamber;
- an ignition unit that ignites combustible gas injected into the combustion chamber, wherein the striking member provides the fastener with a striking force when the combustion chamber broadens in accordance with the combustion of the combustible gas injected into the combustion chamber;
- a trigger that is operated by a user for driving the fastener into a workpiece;
- and
- a control member that detects that the combustion chamber has been provided and the trigger has been operated, and allows the ignition unit to ignite the combustible gas only when the control member detects that both the combustion chamber has been provided and the trigger has been operated.
A combustion-type power tool comprising:
- a housing defining an outer frame;
- a cylinder provided in the housing;
- a piston movable in the cylinder;
- a combustion chamber frame movable along the cylinder and stopping moving at a stop position;
- a push lever connected to the combustion chamber frame and movable in accordance with the move of the combustion chamber frame;
- a trigger switch that is operated by a user for driving the fastener into a workpiece;
- and
- a switch lever having one end movable in accordance with the move of the combustion chamber frame, and the other end capable of being opposed to the trigger switch,
- wherein the switch lever is provided such that the other end of the switch lever contacts the trigger switch when the trigger switch is operated in a state where the combustion chamber frame stops at the stop position.
A combustion-type power tool comprising:
- a housing defining an outer frame;
- a cylinder provided in the housing;
- a piston movable in the cylinder;
- a combustion chamber frame movable along the cylinder and stopping moving at a stop position;
- a push lever connected to the combustion chamber frame, wherein the combustion chamber moves when the push lever is operated by a user;
- a trigger switch that is operated by the user for driving the fastener into a workpiece;
- and
- a switch lever having one end movable in accordance with the move of the combustion chamber frame, and the other end capable of being opposed to the trigger switch,
- a restrain member that contacts the other end in order to prevent the other end from contacting the trigger switch when the trigger is operated before the combustion chamber has been provided.
Dependencies are inferred from the claim text.