In a gas combustion type fastener driving machine, a fuel gas and air are stirred by a fan within a combustion chamber, a stirred air-fuel gas mixture is burned by an ignition spark, and a striking piston is actuated by a combustion pressure to drive a fastening member. The machine is provided with a fan motor ( 320 ) for rotating the fan, and a control circuit board ( 100 ) for controlling an action of the fan motor ( 320 ). The control circuit board ( 100 ) detects an actuation signal for an igniter ( 310 ) that generates the ignition spark and controls a rotation speed of the fan motor ( 320 ) based on the actuation signal.

Claims

4 · 1 independent · depth 2

4 granted claims

›1.independentA gas combustion type fastener driving machine in which a fuel gas and air are stirred by a fan at an air-fuel gas mixture stirring speed within a com…+3

Classifications

5 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B25C1/04

USPC · US Patent Classification

227/2227/130227/10123/46.SC

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Pendency

2.5 y

909 days filing → grant

Office actions

non-final + final

Responses

no RCE

Examiner

Scott A. Smith

art unit 3721 · TC 3700

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Citations: 13 back · 0 forward

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Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20110240708 A1	6 Oct 2011

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