Fastener driving tool

Details Fastener driving tool Fastener driving tool

1983-07-22

1985-06-18

Mackey, Robert R.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173115, 227 8, 227130, 92 12, B25C 513

Patent

active

045236461

ABSTRACT:
A fastener driving tool includes a housing defining a handle portion and a head portion with a nose portion extending therebelow. Mounted within the head portion is a cylindrical sleeve within which is reciprocally mounted a drive piston. A driver for driving fasteners is secured to the drive piston and reciprocates therewith. The tool includes a drive power control for controlling the penetration of the fasteners into a workpiece. The drive power control includes a choke encircling the sleeve to impede the flow of exhaust air from beneath the piston and under the sleeve during a driving stroke. The choke may be moved to a position spaced from the cylindrical sleeve wherein the flow of fluid below the piston is not inhibited. In addition, the tool includes a safety member with a workpiece engaging portion of at least one wear block secured thereto to engage the workpiece and protect the safety member from undue wear.

REFERENCES:
patent: 1990052 (1935-02-01), Sosa
patent: 2980071 (1961-04-01), Ottestad
patent: 3580455 (1971-05-01), Cast et al.
patent: 3601007 (1971-08-01), Korth
patent: 3715069 (1973-02-01), O'Conner
patent: 3905535 (1975-09-01), Novak et al.
patent: 4030655 (1977-06-01), Rothfuss et al.

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