Tool driving or impacting – Drive adjustable to completely change kind of drive – Adjustable to impacting device
Reexamination Certificate
2007-01-16
2008-11-04
Rada, Rinaldi I. (Department: 3721)
Tool driving or impacting
Drive adjustable to completely change kind of drive
Adjustable to impacting device
C173S204000, C173S128000, C173S212000, C173S217000
Reexamination Certificate
active
07445054
ABSTRACT:
A driving mechanism for a powered hammer having a motor and a tool holder includes a ram mounted for reciprocation in a guide tube section. The ram has a radially outwardly projecting sealing portion and an outer circumferential surface that defines a helically shaped vent channel running from a front end portion of the circumferential surface to a rear end portion of the circumferential surface and being interrupted by the sealing portion. A piston is driven in reciprocating motion of the motor such that an air cushion is generated in a space between the ram and the piston to cause an impact on the tool bit by movement of the ram towards the tool bit. The space between the ram and the piston is temporarily connected with ambient air through the helical vent channel and a recess in the wall of the guide tube section after causing the impact on the tool bit.
REFERENCES:
patent: 2880585 (1959-04-01), Badcock
patent: 3034302 (1962-05-01), Akerman
patent: 3507337 (1970-04-01), Chromy
patent: 4512417 (1985-04-01), Kurt
patent: 5873418 (1999-02-01), Arakawa et al.
patent: 6196330 (2001-03-01), Matthias et al.
patent: 6913089 (2005-07-01), Stirm
patent: 2108594 (1983-05-01), None
patent: 2108594 (1983-05-01), None
patent: WO02/22316 (2002-03-01), None
patent: WO0222316 (2002-03-01), None
Search Report—UK Intellectual Property Office for related application GB06033744.4.
Buchholz Achim
Heep Tobias
Ayala Adan
Black & Decker Inc.
Lopez Michelle
Markow Scott B.
Rada Rinaldi I.
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