The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2020
Filed:
Nov. 09, 2017
Tti (Macao Commercial Offshore) Limited, Macau, MO;
Edward Pomeroy, Piedmont, SC (US);
Zachary Scott, Easley, SC (US);
John Schnell, Anderson, SC (US);
Essam Namouz, Greenville, SC (US);
TTI (MACAO COMMERCIAL OFFSHORE) LIMITED, Macau, MO;
Abstract
A fastener driver comprises a drive blade movable from a retracted position to an extended, driven position for driving a fastener into a workpiece and a gas spring mechanism for driving the drive blade from the retracted position to the driven position. The gas spring mechanism includes a drive cylinder and a drive piston attached to the drive blade for movement therewith. The drive piston is acted on by a driving force resulting from a pressure differential created by the gas spring mechanism. The fastener driver also includes an adjustable valve for selectively limiting a flow of gas into the drive cylinder above the drive piston, or a flow of ambient air at atmospheric pressure from the drive cylinder beneath the drive piston, thereby changing the pressure differential acting on the drive piston, as the drive piston and the drive blade move from the retracted position to the extended position.