Hammer

Details Hammer Hammer

2006-07-18

2006-07-18

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Processes

C173S109000, C173S201000, C092S187000

Reexamination Certificate

active

07077217

ABSTRACT:
An electrically powered hammer is provided comprising a housing, a spindle, a hammering mechanism including a piston reciprocatingly mounted within the spindle, a wobble drive arrangement reciprocatingly connected to the piston, a trunnion arrangement including a cross bolt is driving engaged between the wobble drive arrangement and the piston, and wherein the piston includes a pair of piston arms and a protrusion so that the first piston arm and the protrusion define a first recess and the second piston arm and the protrusion define a second recess, and each of the recesses is shaped so as to support a wear reducing washer in an assembled position. When assembled each washer fits around the cross bolt in a region adjacent the inwardly facing face of the associated piston arm so as to reduce wear between the cross bolt and the piston arms.

REFERENCES:
patent: 1812934 (1931-07-01), Curtis
patent: 1939959 (1933-12-01), Burns
patent: 2422327 (1947-06-01), Winslow
patent: 2850340 (1958-09-01), Elmer
patent: 4138838 (1979-02-01), Long
patent: 4291614 (1981-09-01), Molle et al.
patent: 4371357 (1983-02-01), Petrzelka et al.
patent: 4419086 (1983-12-01), Condon
patent: 4446931 (1984-05-01), Bleicher et al.
patent: 4537264 (1985-08-01), Schmid et al.
patent: 4955741 (1990-09-01), Komeyama
patent: 5277259 (1994-01-01), Schmid et al.
patent: 5813916 (1998-09-01), Lentini et al.
patent: 5865678 (1999-02-01), Koedam et al.
patent: 6238318 (2001-05-01), Itoh et al.
patent: 6336868 (2002-01-01), Kurecka et al.
patent: 0445107 (1991-03-01), None
patent: 2085345 (1981-09-01), None

Affiliated with

Also associated with

Rating

Hammer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hammer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hammer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3589824