Hammer drill with a mode change-over mechanism

Details Hammer drill with a mode change-over mechanism Hammer drill with a mode change-over mechanism

1996-08-15

1998-12-01

Smith, Scott A.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

173104, B25D 904

Patent

active

058425276

ABSTRACT:
A hammer drill has a mode change-over mechanism including a change link with a horizontally elongated slot, an eccentric pin projecting from a mode selector switch and penetrating the slot. The change link is moved vertically by rotating the mode selector switch, which in turn vertically moves a pair of change keys secured to a holder of the change link, thus either engaging or disengaging the change keys with or from a sleeve provided in a rotation transmission mechanism for transmitting the rotation of a motor to the tool holder. In the engagement position, the rotation of the motor of the hammer drill is transmitted to a tool holder while in the disengagement position, the rotation of the motor is not transmitted. Also, the eccentric pin is engaged with a square recess formed in a lock ring which is fitted around the tool holder and urged backward by a compression spring. The eccentric pin is horizontally moved by rotating the mode selector switch, which in turn moves the lock ring in the axial direction, thereby couple or de-couple the lock ring to or from the tool holder.

REFERENCES:
patent: 4506743 (1985-03-01), Grossman
patent: 4895212 (1990-01-01), Wache
patent: 5111889 (1992-05-01), Neumaier
patent: 5111890 (1992-05-01), Ranger et al.
patent: 5343961 (1994-09-01), Ichikawa et al.
patent: 5379848 (1995-01-01), Rauser
patent: 5456324 (1995-10-01), Takagi et al.

Affiliated with

Also associated with

Rating

Hammer drill with a mode change-over mechanism 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 drill with a mode change-over mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hammer drill with a mode change-over mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2389643