Wai Alex Ho

US Patent:

20170361443, Dec 21, 2017

Filed:

Jun 20, 2017

Appl. No.:

15/627450

Inventors:

- New Britain CT, US
Jonathan W. Fairbanks - Coventry RI, US
Jonathan D. Kalow - East Greenwich RI, US
Wai J. Ho - Providence RI, US

International Classification:

B25C 1/04
B25C 1/00

Abstract:

A pneumatic fastening tool that has an integrated valve assembly. The integrated valve assembly can have a cylindrical valve assembly housing that can house a portion of a head valve assembly and can also house at least a portion of a trigger valve assembly. The head valve assembly can have a head valve body that can be maintained in a resting state by compressed air. The compressed air that maintains the resting stat of the head valve assembly can be provided by one or more passages formed in the valve assembly housing. The valve assembly housing can also guide the movement of the valve head body when the trigger valve assembly is actuated causing a fastener to be driven into a workpiece. The valve assembly housing can have a circular exhaust seal and a cylindrical exhaust chamber through which compressed air can be exhausted after the driving of a fastener into a work piece.

US Patent:

20150008246, Jan 8, 2015

Filed:

Sep 12, 2014

Appl. No.:

14/484530

Inventors:

- East Greenwich RI, US
David M. MCGEE - Attleboro MA, US
Adair YANG - Taichung City, TW
Brian C. BURKE - Barrington RI, US
Paul GRANDSTRAND - Providence RI, US
Wai HO - Providence RI, US
Donald R. PERRON - North Smithfield RI, US

International Classification:

B25C 1/00
B25C 1/04

US Classification:

227 8

Abstract:

A fastening tool includes an actuation device configured to actuate a drive engine of the tool to initiate a drive stroke. The actuation device includes a contact trip assembly operatively connected to the movable portion of the nose assembly. The contact trip assembly a lower contact arm connected to the movable portion of the nose assembly biased in the retracted position and movable to the extended position with the moveable portion of the nose assembly, and an upper contact arm operatively connected to the lower contact arm. The actuation device includes a trigger assembly that includes a trigger, a trigger arm pivotally supported by the trigger and configured to interact with the upper contact arm, and a check pawl configured to engage an opening in the upper contact arm when the upper contact arm moves downward to prevent the tool from being operated in a contact trip mode.