Independently and jointly operable radial saw guards

• US 5,353,670 A
• Filed: 03/15/1993
• Issued: 10/11/1994
• Est. Priority Date: 03/15/1993
• Status: Expired due to Term

• Current Assignee: Emerson Electric Company
• Original Assignee: Emerson Electric Company
• Inventors: Metzger, James I. Jr.
• Primary Examiner(s): PHAN, HIEN HUY
• Application Number:
  US08/038,681
• Time in Patent Office: 575 Days
• Field of Search: 83/102.1, 83/471.3, 83/478, 83/477.1, 83/486.1, 83/DIG. 1
• US Class Current: 83/471.3
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: Y10S 83/01 Safety devices
• CPC Class Codes: Y10T 83/7697 Tool angularly adjustable relative to work-support
• CPC Class Codes: Y10T 83/7734 With guard for tool
• CPC Class Codes: Y10T 83/7772 Angular relative to previous path

Abstract

A radial saw with independently and jointly operable saw blade guards is disclosed. The independently and jointly operable saw blade guards include an upper blade guard mounted in fixed position relative to a yoke that depends from a supporting arm, the upper blade guard covering at least approximately an upper half of a motor driven saw blade that is mounted on the yoke. A lower rear blade guard is pivotally mounted to the upper blade guard and is configured to cover a lower half rear area on at least one side of the motor driven saw blade, and a lower front blade guard is independently pivotally mounted to the upper blade guard and configured to cover a lower front half area on at least one side of the motor driven saw blade guard. The lower rear blade guard and lower front blade guard are independently and jointly operable and telescopically movable with respect to one another.

Claims

1. A radial saw for rip cutting and cross cutting workpieces comprising:

a motor driven saw blade mounted on a yoke depending from a supporting arm that overhangs a worktable, said motor driven saw blade being movable relative to a worktable mounted fence to enable said motor driven saw blade to be operated for rip cutting workpieces longitudinally relative to the fence and for cross cutting transverse relative to the fence;

an upper blade guard mounted in fixed position relative to said yoke mounted motor driven saw blade for covering at least approximately an upper half of the motor driven saw blade;

a lower rear blade guard pivotally mounted to the upper blade guard and configured to cover a lower half rear area on at least one side of the motor driven saw blade;

a lower front blade guard independently pivotally mounted to the upper blade guard and configured to cover a lower half front area on at least one side of the motor driven saw blade guard; and

said lower rear blade guard including a wrong way feed barrier during rip cutting.

2. The radial saw as defined in claim 1 wherein the lower rear blade guard and lower front blade guard are telescopically movable with respect to one another to provide substantial protection to a user through limited exposure to said motor driven saw blade.

3. The radial saw as defined in claim 2 wherein the lower rear blade guard is also telescopically movable relative to the upper blade guard when the lower rear blade guard is lifted at the start of cross cutting or for rip cutting.

4. The radial saw as defined in claim 3 wherein the lower rear blade guard and lower front blade guard have a joint pivotal mounting to the upper blade guard and include cooperating complementary pin and slot means spaced from the joint pivotal mounting of said lower rear blade guard and lower front blade guard to assist in telescopic movement with respect to one another.

5. The radial saw as defined in claim 4 wherein the lower rear blade guard is a U-shaped element that extends on opposite sides of and across an outfeed end of said motor driven saw blade.

6. The radial saw as defined in claim 5 wherein said lower front blade guard comprises a flat plate section on one side of the motor driven saw blade.

7. The radial saw as defined in claim 6 wherein said lower front blade guard comprises a pair of opposed flat plate sections mounted on opposite sides of said motor driven saw blade.

8. The radial saw as defined in claim 1 wherein the wrong way feed barrier includes a blunt transverse wall along an outfeed end of the lower rear blade guard to provide the wrong way feed barrier during rip cutting.

9. The radial saw as defined in claim 8 wherein the lower rear blade guard includes an angular wall section that extends upwardly and outwardly from the blunt transverse wall and terminates in an inclined upper wall section that overlies the upper blade guard.

10. The radial saw as defined in claim 9 and including means for lifting the lower rear blade guard relative to the upper blade guard at the start of cross cutting.

11. The radial saw as defined in claim 10 wherein the means to raise the lower rear blade guard includes hand operated trigger means connected to the lower rear blade guard for raising same.

12. The radial saw as defined in claim 8 wherein the lower front blade guard includes a curved shape along an infeed end which cooperates with the joint pivotal and telescopic mounting of the lower rear blade guard and lower front blade guard to each other to facilitate automatic upward or downward movement of the lower front blade guard upon engaging or disengaging a workpiece.

13. A radial saw for rip cutting and cross cutting workpieces comprising:

a motor driven saw blade mounted on a yoke depends from a supporting arm that overhangs a worktable, said motor driven saw blade being movable relative to a worktable mounted fence to enable said motor driven saw blade to be operated for rip cutting workpieces longitudinally relative to the fence and for cross cutting transverse relative to the fence;

an upper blade guard mounted in fixed position relative to said yoke mounted motor driven saw blade for covering at least approximately an upper half of the motor driven saw blade;

a lower rear blade guard pivotally mounted to the upper blade guard and configured to cover a lower half rear area of the motor driven saw blade, said lower blade guard including a wrong way feed barrier during rip cutting;

a lower front blade guard independently and pivotally mounted to the upper blade guard and configured to cover a lower half front area on at least one side of the motor driven saw blade, said lower front blade guard including automatic lifting means to facilitate upward or downward movement relative to lower rear guard and the upper blade guard upon engaging or disengaging a workpiece;

said lower rear blade guard and said lower front blade guard being telescopically movable with respect to one another to provide substantial protection to a user through limited exposure of said motor driven saw blade during rip cutting;

said lower rear blade guard and said upper blade guard being telescopically movable with respect to one another when the lower rear blade guard is lifted during cross cutting; and

said lower rear blade guard includes a blunt transverse wall at an outfeed end which serves as the wrong way feed barrier during rip cutting.

14. The radial saw as defined in claim 13 wherein the lower rear blade guard is a U-shaped element having the blunt transverse wall and an upper angular wall section forming a bight end portion of the U-shaped element which cover blade tip ends of the motor driven saw blade, and generally parallel and opposed triangular shaped side plates extending from the bight end portion for covering opposite sides of the motor driven saw blade, the triangular shaped side plates of the U-shaped lower rear blade guard being pivotally mounted to the upper blade guard at a location spaced from the bight end portion of the U-shaped lower rear blade guard.

15. The radial saw as defined in claim 14 wherein the lower front blade guard comprises a pair of flat plate sections on opposite sides of the motor driven saw blade which are pivotally mounted on the upper blade guard, each of said flat plate sections having a curved shaped along an infeed end which cooperates with the joint pivotal mounting of the lower rear blade guard and lower front blade guard to facilitate automatic upward or downward movement of the flat plate sections relative to the lower rear blade guard and upper blade guard upon engaging or disengaging a workpiece.

16. The radial saw as defined in claim 15 and further including cooperating complementary pin and slot means between the flat plate sections of the lower front blade guard and the generally triangularly shaped sections of the lower rear blade guard to facilitate telescopic movement of the lower front blade guard and lower rear blade guard relative to each other.

17. A radial saw for rip cutting and cross cutting workpieces comprising:

a motor driven saw blade mounted on a yoke depends from a supporting arm that overhangs a worktable, said motor driven saw blade being movable relative to a worktable mounted fence to enable said motor driven saw blade to be operated for rip cutting workpieces longitudinally relative to the fence and for cross cutting transverse relative to the fence;

an upper blade guard mounted in fixed position relative to said yoke mounted motor driven saw blade for covering at least approximately an upper half of the motor driven saw blade;

a lower rear blade guard pivotally mounted to the upper blade guard and configured to cover a lower half rear area of the motor driven saw blade;

a lower front blade guard independently and pivotally mounted to the upper blade guard and configured to cover a lower half front area of the motor driven saw blade;

said lower rear blade guard and said lower front blade guard being telescopically movable with respect to one another to provide substantial protection to a user through limited exposure of said motor driven saw blade during rip cutting;

said lower rear blade guard and said upper blade guard being telescopically movable with respect to one another when the lower rear blade guard is lifted during cross cutting;

said lower rear blade guard and said lower front blade guard being provided on at least one side of said motor driven saw blade; and

said lower rear blade guard including a blunt transverse wall at an outfeed end which serves as wrong way feed barrier means during rip cutting.

18. The radial saw as defined in claim 17 wherein said lower rear blade guard and said lower front blade guard are provided on both sides of said motor driven saw blade.