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US Patent 9943952 Driving tool

Patent 9943952 was granted and assigned to Makita on April, 2018 by the United States Patent and Trademark Office.

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent

Patent attributes

Patent Applicant
Makita
Makita
Current Assignee
Makita
Makita
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
9943952
Date of Patent
April 17, 2018
Patent Application Number
14565993
Date Filed
December 10, 2014
Patent Citations Received
‌
US Patent 11850714 Powered fastener driver
3
Patent Primary Examiner
‌
Gloria R Weeks
Patent abstract

An electro-pneumatic tool drives a fastener into a workpiece by energizing an electric motor to drive a first piston and generate compressed air in a first cylinder. The compressed air is then supplied to a second cylinder and causes a second piston to move and drive the fastener into the workpiece. After the first piston has passed through its top dead center, braking is applied to the first piston according to one or more braking parameters. Then, if a control unit determines that the first piston has come to a stop at a position that is outside a predetermined range about the bottom dead center of the first piston, one or more of the braking parameters is changed in a subsequent fastener driving cycle to cause the first piston to stop closer to its bottom dead center after conclusion of the subsequent fastener driving cycle.

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