Percussion hammer for enlarging drilled holes

Details Percussion hammer for enlarging drilled holes Percussion hammer for enlarging drilled holes

2006-09-07

2010-06-15

Neuder, William P (Department: 3676)

Boring or penetrating the earth

Bit or bit element

Noncutting portion forwardly of cutting portion

C175S389000, C175S415000

Reexamination Certificate

active

07735584

ABSTRACT:
The present invention relates to a percussion hammer for enlarging drilled holes. The hammer comprises an external outer wear sleeve (5), an inner cylinder (7) mounted co-axially within the outer wear sleeve (5), a tubular torque shaft (3) disposed axially and centrally of the hammer assembly, and extending longitudinally through the assembly. The hammer further comprises a sliding piston (6) mounted for reciprocating movement within the inner cylinder (7) and outer wear sleeve (10) and about the tubular torque shaft (3) to strike a hammer bit (1) for reciprocal movement in a chuck (4) adjacent a forward end of the hammer assembly. The hammer bit (1) has a central bore (46) through which the torque shaft (3) extends, such that the torque shaft (3) protrudes forwardly of the hammer.

REFERENCES:
patent: 4117895 (1978-10-01), Ward et al.
patent: 4836306 (1989-06-01), Barrows
patent: 4862976 (1989-09-01), Meek
patent: 5096000 (1992-03-01), Hesse
patent: 5238073 (1993-08-01), Rear
patent: 5494116 (1996-02-01), Wentworth
patent: 5782311 (1998-07-01), Wentworth
patent: 5791419 (1998-08-01), Välisalo
patent: 5803187 (1998-09-01), Javins
patent: 6386299 (2002-05-01), Kato
patent: 6394197 (2002-05-01), Holte
patent: 6637520 (2003-10-01), Purcell
patent: 6808030 (2004-10-01), Klemm
patent: 2003/0044238 (2003-03-01), Wentworth et al.
patent: 2004/0089473 (2004-05-01), Kayes
patent: 2006/0000646 (2006-01-01), Purcell
patent: 0507610 (1992-10-01), None
patent: WO 00/55469 (2000-09-01), None
patent: WO 2004031530 (2004-04-01), None

Affiliated with

Also associated with

Rating

Percussion hammer for enlarging drilled holes does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4186531