# US 5,699,844 A · Router plate with removable inserts

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- Number: US 5,699,844 A
- Document ID: US5699844A
- Status: Granted
- Kind: A
- Application number: 08/734,585
- Filed: 1996-10-22
- Granted: 1997-12-23
- Earliest claimed: 1996-10-22
- Inventors: Bradley R. Witt
- Web page: https://patentgrep.com/patent/US5699844A

## CPC

- B27C 5/02: Machines with table
- B27C 5/10: Portable hand-operated wood-milling machines; Routers
- Y10T 29/49826: Assembling or joining
- Y10T 29/49938: Radially expanding part in cavity, aperture, or hollow body
- B27C: PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL (machine tools in general B23; working wood using abrasive, e.g. sanding, devices B24; tools for these purposes B27G)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A router plate for use with a router having a planar surface and an arbor projecting therethrough. The router plate comprises a flat plate member having an opening extending therethrough with a rabbet flange extending inwardly from the outer perimetric edges of the opening. The invention also includes a removable insert that resides within the opening in the router plate and is supported by the rabbet flange. A plurality of removable inserts may be provided, each having a differently sized aperture for accepting a particular router bit. The insert appropriately sized for a particular application is detachably mounted to the router plate.

## Claims

### Claim 1

A router plate for use with a router having a planar surface and an arbor projecting from said planar surface, said router plate comprising:
a flat plate member having an opening extending therethrough, said opening having first and second axial ends and circular outer perimetric edges, an enlarged portion of said opening being adjacent said first axial end, a rabbet flange extending inwardly from said outer perimetric edges adjacent said second axial end; and
a raised O-ring disposed between said first axial end and said rabbet flange.

### Claim 2 (depends on 1)

The router plate of claim 1 wherein said O-ring being formed of an elastomeric material.

### Claim 3 (depends on 1)

The router plate of claim 1 further comprising a removable insert having a top surface, a bottom surface, and a side edge between said top and bottom surfaces, said insert being disposed within said opening with said bottom surface being supported by said rabbet flange and said side edge having a grove for receiving said O-ring.

### Claim 4 (depends on 3)

The router plate of claim 3 wherein said removable insert having an aperture extending between said top and bottom surfaces for receiving said arbor therethrough.

### Claim 5 (depends on 4)

The router plate of claim 4 wherein said aperture being circular about said top and bottom surfaces.

### Claim 6

A method of detachably securing one of a plurality of removable inserts to a router plate for use with a router having a planar surface and a router bit mounted on an arbor projecting from said planar surface, said router plate having a flat plate member with an opening extending therethrough, said opening having first and second axial ends and circular outer perimetric edges, an enlarged portion of said opening being adjacent said first axial end, a rabbet flange extending inwardly from said outer perimetric edges adjacent said second axial end, an O-ring disposed between said first axial end and said rabbet flange, each of said inserts having a top surface, a bottom surface, and a side edge with a grove between said top and bottom surfaces, said method comprising the steps of: inserting one of said removable inserts into said opening; said bottom surface of said insert being supported by said rabbet flange and said grove receiving said O-ring.

### Claim 7 (depends on 6)

The method of claim 6 wherein at least one of said removable inserts having an aperture extending between said top and bottom surfaces, said method further comprising the step of selecting the particular one of said inserts having said aperture sized to accept said bit.

### Claim 8

A woodworking apparatus for use with a router having a planar mounting surface and an arbor projecting from said planar mounting surface comprising:
a router plate mounted on top of said planar mounting surface, said router plate having an opening extending therethrough, said opening having first and second axial ends and circular outer perimetric edges, an enlarged portion of said opening being adjacent said first axial end, a rabbet flange extending inwardly from said outer perimetric edges adjacent said second axial end;
a removable insert having a top surface, a bottom surface, and a side edge between said top and bottom surfaces, said insert being disposed within said opening with said bottom surface being supported by said rabbet flange; and
an O-ring being disposed between said outer perimetric edges of said router plate and said side edge of said insert.

### Claim 9 (depends on 8)

The woodworking apparatus of claim 8 wherein router plate having a ridge on said outer perimetric edges said side edge of said removable insert having a grove for receiving said O-ring.

### Claim 10 (depends on 8)

The woodworking apparatus of claim 8 wherein said removable insert having an aperture extending between said top and bottom surfaces for receiving said arbor therethrough.

### Claim 11 (depends on 10)

The woodworking apparatus of claim 10 further comprising a router bit mounted on said arbor, said aperture of said removable insert being sized to accept said bit.

### Claim 12 (depends on 8)

The woodworking apparatus of claim 8 wherein said O-ring being elastomeric.