Compound miter saw

• US 5,042,348 A
• Filed: 05/07/1990
• Issued: 08/27/1991
• Est. Priority Date: 06/29/1988
• Status: Expired due to Term

• Current Assignee: Home Depot USA Incorporated (The Home Depot, Inc.)
• Original Assignee: Emerson Electric Company
• Inventors: Mitchell, Richard L., Brundage, Richard B.
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): Jones, Eugenia A.
• Application Number:
  US07/519,873
• Time in Patent Office: 477 Days
• Field of Search: 83/397, 83/468.3, 83/468.7, 83/471.3, 83/478, 83/490, 83/581, 83/522.15, 83/522.18
• US Class Current: 83/471.3
• CPC Class Codes: B23D 45/044 the saw blade being adjustable according to angle of cut B23D45/025 takes precedence
• CPC Class Codes: B23D 59/006 for removing or collecting chips
• CPC Class Codes: B23Q 1/5412 followed perpendicularly by a single rotating pair
• CPC Class Codes: B27B 27/04 arranged perpendicularly to the plane of the saw blade
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: B27G 5/02 for sawing mitre joints; Mitre boxes guide fences for timber in sawing machines B27B27/00
• CPC Class Codes: Y10T 83/606 Interrelated tool actuating means and guard means
• CPC Class Codes: Y10T 83/762 Angularly relative to plane of cut; e.g., miter
• CPC Class Codes: Y10T 83/7647 Adjustable
• 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 83/7788 Tool carrier oscillated or rotated
• CPC Class Codes: Y10T 83/857 Calibrated scale or indicator
• CPC Class Codes: Y10T 83/8773 Bevel or miter cut

Abstract

In a compound miter saw or the like having a selectively rotatable turntable mounted on a supporting frame and a power driven saw blade pivotally mounted on the turntable between a lowered full cut position and a raised full retract position, the improvements comprising a work supporting fence that is maintained in alignment with a turntable slot while the turntable, including associated saw blade slot, is positioned for desired miter cuts; and the work supporting fence also being accurately and effectively clamped relative to the supporting frame, in both front and rear work supporting fence positions. Additional improvements include a swinging blade guard for the power driven saw blade having a pivot center eccentrically offset upwards from the shaft on which the saw blade rotates and back toward the pivotal mounting of the saw on the turntable, to facilitate access to the saw blade shaft and precludes interference with bevel cuts; and first and second transversely extending closed cylinders between the turntable and the saw, enabling pivotal movement of the saw between full cut and full retract positions, while also permitting bevel pivotal adjustment of the saw relative to the turntable.

Claims

1. A compound miter saw comprising:

a supporting frame, a turnable selectively rotatably mounted on said supporting frame for selective miter adjustment, a saw blade being pivotally mounted on said turntable for movement between an operational position when lowered, and an at rest position when raised, said saw blade also being pivotally mounted on said turntable for adjustment in a direction generally transverse to the pivotal movement of said saw blade between operational and at rest positions, first and second chambers extending transversely relative to one another and having transversely extending axes, said first and second transversely extending chambers being positioned between said supporting frame and said saw blade, the first chamber including fixed and movable chamber sections for pivotal movement of said saw blade between operational and at rest positions, and said second chamber including fixed and movable chamber sections for pivot adjustment of said saw blade relative to said turntable, and said first and second transversely extending chambers being interconnected to one another across one of the fixed and movable chamber sections between said first and second transversely extending chambers.

2. The saw as defined in claim 1 wherein the fixed chamber section of the first chamber is integrally joined to the movable chamber section of the second chamber for movement therewith during the pivot adjustment of said saw relative to said turntable.

3. The saw as defined in claim 2 wherein bevel scale is mounted to one of the fixed and movable chamber sections of one of said first and second chambers.

4. The saw as defined in claim 3 wherein the bevel scale is mounted on a controlled radius provided on the chamber section to which it is mounted.

5. In a compound miter saw, a supporting frame, a turntable selectively rotatably mounted on said supporting frame for selective miter adjustment, a saw blade being pivotally mounted on said turntable for movement between an operational position when lowered, and at rest position when raised, said saw blade also being pivotally mounted on said turntable for adjustment in a direction generally transverse to the pivotal movement of said saw blade between operational and at rest positions, the improvement comprising:

first and second transversely extending mounting means positioned between said supporting frame and said saw blade, the first mounting means including means for pivot movement of said saw blade between operational and at rest positions, said second mounting means including means for adjustment of said saw blade relative to said turntable, said first and second transversely extending mounting means each including fixed and movable sections enabling said aforementioned pivot movement through said first mounting means and bevel adjustment through said second mounting means, said first and second mounting means being at least partially interconnected to one another, and bevel scale means associated with the fixed and moving sections of said second mounting means for the bevel adjustment of said saw blade relative to said turntable.

6. The improvement as defined in claim 5 wherein said first and second transversely extending mounting means are integrally joined and fixed to one another across one of the fixed and moving sections thereof.

7. The improvement defined in claim 6 wherein the fixed section of the first mounting means is integrally joined to the moving section of the second mounting means for movement therewith during adjustment of said saw blade relative to said turntable.

8. A compound miter saw comprising:

a supporting frame, a turntable selectively rotatably mounted on said supporting frame for selective miter adjustment, a saw blade being pivotally mounted on said turntable for movement between an operational position when lowered, and an at rest position when raised, said saw blade also being pivotally mounted on said turntable for adjustment in a direction generally transverse to the pivotal movement of said saw blade between operational and at rest positions, first and second mounting means extending tranversely relative to one another, said first and second transversely extending mounting means being positioned between said supporting frame and said saw blade, the first mounting means including fixed and movable sections for pivotal movement of said saw blade between operational and at rest positions, and said second mounting means including fixed and movable sections for bevel adjustment of said saw blade relative to said turntable, and said first and second transversely extending mounting means being interconnected to one another across one of the fixed and movable sections between said first and second transversely extending mounting means, and bevel scale means associated with the fixed and movable sections of said second mounting means for bevel adjustment of said saw blade relative to said turntable.