Safety cover for miter saw

• US 4,805,504 A
• Filed: 12/24/1987
• Issued: 02/21/1989
• Est. Priority Date: 12/29/1986
• Status: Expired due to Term

• Current Assignee: Makita Electric Works Ltd (Makita Corporation)
• Original Assignee: Makita Electric Works Ltd (Makita Corporation)
• Inventors: Tsuge, Kazunori, Inoue, Nobuhiro, Fushiya, Fusao
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): RADA, RINALDI I
• Application Number:
  US07/137,668
• Time in Patent Office: 425 Days
• Field of Search: 83/397, 83/478, 83/490, 51/268
• US Class Current: 83/397
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: Y10T 83/606 Interrelated tool actuating means and guard means
• CPC Class Codes: Y10T 83/7734 With guard for tool
• CPC Class Codes: Y10T 83/7788 Tool carrier oscillated or rotated

Abstract

A power miter saw includes a support base and a mounting arm connected to the support base for swinging movement around a vertical axis. A miter saw unit is pivotally connected to the mounting arm. The miter saw unit includes a circular saw blade and a drive motor for driving the saw blade. A blade case is attached to the miter saw unit and is adapted to partially encase the saw blade so as to provide an exposed operational portion of the saw blade. A movable safety cover is mounted on the blade case so as to cover the exposed operational portion of the saw blade. Actuating means is disposed between the mounting arm and the safety cover for directly associating the safety cover with the pivotal movement of the miter saw unit.

Claims

1. A power miter saw comprising:

a support base;

a mounting arm connected to said support base for swinging movement around a vertical axis;

a miter saw unit pivotally connected to said mounting arm for movement between a rest position and an operational position, said saw unit having a circular saw blade and a drive motor for driving said saw blade;

a blade case attached to said miter saw unit and adapted to partially encase said saw blade so as to provide an exposed operational portion of said saw blade;

a movable safety cover mounted on said blade case and adapted to cover said exposed operational portion of said new blade; and

actuating means disposed between said mounting arm and said safety cover, associating said safety cover with the pivotal movement of said miter saw unit, for fixing said safety cover to said saw unit for limited movement of said cover to partially uncover the operational portion of said saw blade in response to movement of said saw unit along a predetermined distance from said rest position, and for freeing said safety cover for movement independently of said saw unit upon movement of said saw unit beyond said predetermined distance from said rest position.

3. The power miter saw as defined in claim 1 wherein said actuating means comprises:

a first engaging pin mounted on said safety cover;

a second engaging pin mounted on said mounting arm; and

an actuating link pivotally supported on said blade case;

said actuating link having a first cam groove formed in one end thereof in generally opposed relation to said first engaging pin for moving said safety cover and having a second cam groove formed in the other end in generally opposed elation to said second engaging pin for controlling the pivotal movement of the safety cover.

2. A power miter saw comprising:

a support base;

a mounting arm connected to said support base for swinging movement around a vertical axis;

a miter saw unit pivotally connected to said mounting arm and having a circular saw blade and a drive motor for driving said saw blade;

a blade case attached to said miter saw unit and adapted to partially encase said saw blade so as to provide an exposed operational portion of said saw blade;

a movable safety cover mounted on said blade case and adapted to cover said exposed operational portion of said saw blade; and

actuating means disposed between said mounting arm and said safety cover, for directly associating said safety cover with the pivotal movement of said miter saw unit, said actuating means comprising;

a first engaging pin mounted on said safety cover;

a second engaging pin mounted on said mounting arm; and

an actuating link pivotally supported on said blade case;

said actuating link having a first cam groove formed in one end thereof in generally opposed relation to said first engaging pin for moving said safety cover and having a second cam groove formed in the other end for controlling the pivotal movement thereof.