IP Library › Patent Application 11773698
Patent Application
App. No. 11/773,698

Bearing structure for a reciprocating shaft in a reciprocating saw

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
11/773,698
Abstract

A reciprocating shaft assembly in a reciprocating saw moves in a reciprocal motion and drives a saw blade via a blade holder. At least one bore is formed in an end of the reciprocating shaft assembly opposite the blade holder. A pin fixed to the saw passes through the bore and acts as a bearing to support the reciprocating shaft assembly in its reciprocating motion.

Claims (20)

1 . A power operated reciprocating tool comprising:

a motor;

a reciprocating shaft adapted for reciprocal movement along a longitudinal axis, and adapted to support a working tool;

a drive assembly operatively associated with the motor for driving the reciprocating shaft in a reciprocal motion;

a drive housing enclosing at least a portion of the shaft and the drive assembly;

a counterweight positioned at least partially within the drive housing and operatively connected with the drive assembly,

the counterweight including a slide which rides in a slot formed on an inside surface of the drive housing; and

a main body housing including a handle portion,

the main body housing enclosing the drive housing.

2 . The power operated reciprocating tool of claim 19 , the motor comprising: a motor shaft operatively coupled with the drive assembly, the motor shaft extending through the drive housing.

3 . The power operated reciprocating tool of claim 20 , wherein the motor shaft extends at least partially through an opening in the counterweight.

4 . The power operated reciprocating tool of claim 19 , the counterweight slide comprising:

a first tab extending from the periphery of the counterweight.

5 . The power operated reciprocating tool of claim 22 , the counterweight slide further comprising:

a second tab extending from the periphery of the counterweight in a direction opposite the first tab with respect to an axis of reciprocating motion.

6 . The power operated reciprocating tool of claim 19 , the drive assembly comprising:

a crank gear having a toothed peripheral wall,

wherein a portion of the counterweight extends around at least a portion of the crank gear peripheral wall

7 . The power operated reciprocating tool of claim 19 , the counterweight comprising:

at least one surface adjacent to the crank gear which has a radius of curvature substantially corresponding to that of the crank gear.