Driving tool

Patent metadata

Field	Value
Publication number	US-11338422-B2
Application number	US-201916251259-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 19, 2018
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A driving tool includes a main body, a trigger, a contact member and a control unit. The main body has a combustion chamber configured to be filled with fuel and compressed air. The trigger is configured to operate an ignition device to combust a mixture of the fuel and the compressed air filled in the combustion chamber. The contact member is brought into contact with a driving target member to enable an operation of the trigger. The control unit is configured to start an injection of the fuel when the contact member is turned on, and to complete an injection of the air after the trigger is turned on.

First claim

What is claimed is:

1. A driving tool comprising:
a main body that has a combustion chamber configured to be filled with fuel and compressed air;
a trigger that is configured to operate an ignition device to combust a mixture of the fuel and the compressed air filled in the combustion chamber;
a contact member that is brought into contact with a driving target member to enable an operation of the trigger; and
a control unit that is configured to start an injection of the fuel when the contact member is turned on, and wherein the control unit is configured to control injection of air to start the injection of air into the combustion chamber after the trigger is turned on and to complete the injection of the air after the trigger is turned on and by the time of igniting the mixture in the combustion chamber.

2. The driving tool according to claim 1 , wherein
the control unit is configured to operate the ignition device to ignite the mixture after a predetermined time elapses after the air starts to be supplied to the combustion chamber.

3. The driving tool according to claim 1 , wherein
the control unit is configured to operate the ignition device to ignite the mixture in a case where both of the contact member and the trigger are turned on.

4. The driving tool according to claim 1 , further comprising:
a pressure measuring unit that is configured to measure pressure of the air supplied into the combustion chamber, wherein
the control unit is configured to operate the ignition device to ignite the mixture in the combustion chamber when the pressure of the combustion chamber measured by the pressure measuring unit reaches a predetermined value.

5. The driving tool according to claim 1 , wherein
the control unit is configured to complete stirring of the mixture in the combustion chamber by the injection of the air after the trigger is turned on.

6. A driving tool comprising:
a main body that has a combustion chamber configured to be filled with fuel and compressed air;
a trigger that is configured to operate an ignition device to combust a mixture of the fuel and the compressed air filled in the combustion chamber;
a contact member that is brought into contact with a driving target member to enable an operation of the trigger; and
a control unit that is configured to start an injection of the fuel when the contact member is turned on, and further wherein the control unit is configured to control injection of air to start the injection of air into the combustion chamber after the trigger is turned on, and
wherein the control unit is further configured to control injection of air and ignition such that ignition occurs after completion of the injection of the air.

Assignees

• Max Co Ltd

Inventors

• Yamamoto Yu
• Yuki Takashi
• Kimura Mitsuhiro
• Takahashi Yasunori
• Kurita Shuhei

Classifications

• B25D9/10

  comprising a built-in internal-combustion engine · CPC title

• B25C1/008

  Safety devices · CPC title

• F02B63/02

  for hand-held tools · CPC title

• B25C1/08 Primary

  operated by combustion pressure · CPC title

• F01L9/10

  by fluid means, e.g. hydraulic · CPC title