Fixed-base router with V-block mounting

• US 5,853,273 A
• Filed: 11/04/1997
• Issued: 12/29/1998
• Est. Priority Date: 11/04/1997
• Status: Expired due to Term

• Current Assignee: Credo Technology Corporation (Robert Bosch GmbH)
• Original Assignee: S-B Power Tool Company (Robert Bosch GmbH)
• Inventors: Coffey, John R.
• Primary Examiner(s): Howell, Daniel W.
• Assistant Examiner(s): Bhargava, Adesh
• Application Number:
  US08/963,917
• Time in Patent Office: 420 Days
• Field of Search: 409/182, 409/181, 409/200, 409/204, 144/136.49, 144/154.5, 144/371
• US Class Current: 409/182
• CPC Class Codes: B27C 5/10 Portable hand-operated wood-milling machines; Routers
• CPC Class Codes: Y10T 409/306608 End mill [e.g., router, etc.]
• CPC Class Codes: Y10T 409/307616 with means to move cutter eccentrically

Abstract

The fixed-base router includes a base assembly and a cylindrical motor housing. The base assembly has a cylindrical member which is hollow defining a vertically disposed inner cylindrical surface with two axially extending ribs. The cylindrical member has an axial slot between a pair of adjacent inner projections. Only the two ribs and the inner projections engage the cylindrical motor housing when the base cylinder is clamped to the cylindrical motor housing. The two ribs and the slot are substantially equally spaced from each other.

Claims

1. A fixed-base router comprising:

(a) a base assembly including a first annular base member mounting a second vertically disposed base member, said second base member including two, horizontally spaced, vertically extending support ribs and at least one clamping surface substantially equally spaced from each of said support ribs; and

(b) a motor housing having a vertically disposed, cylindrical exterior surface, said motor housing being mounted by said base assembly with said support ribs and said clamping surface in engagement with said exterior surface, said support ribs and said clamping surface establishing the only areas of supporting engagement between the base assembly and said motor housing.

2. The fixed-base router according to claim 1 wherein each of said support ribs and said clamping surface are substantially equally spaced from each other.

3. The fixed-base router according to claim 1 wherein said support ribs are defined by planar surfaces in tangential engagement with said cylindrical exterior surface.

4. A fixed-base router according to claim 3 wherein said clamping surface is defined by at least one planar surface in tangential engagement with said cylindrical exterior surface.

5. A fixed-base router comprising:

(a) a base assembly including an annular base member mounting a cylindrical base member in substantial concentric relationship therewith, said cylindrical base member being hollow and defining a vertically disposed, cylindrical inner surface, said cylindrical base member having an axially extending through slot defining opposed faces spaced at a predetermined distance when the cylindrical base member is in a relaxed state thereby establishing a first diameter of the cylindrical inner surface;

(b) a motor housing including a cylindrical outer surface having an outside diameter less than said first diameter of said cylindrical inner surface, said cylindrical housing being telescopingly and slidably received within said cylindrical base member for vertical movement relative thereto;

(c) clamping means mounted on said base assembly and being movable back and forth between an unclamped position wherein said opposed faces are spaced at said predetermined distance and a clamped position wherein said opposed faces are spaced at a distance less than said predetermined distance; and

(d) said inner surface of the base member including at least two arcuately spaced, inwardly disposed, vertically extending support ribs in engagement with said cylindrical outer surface at axially extending areas of the cylindrical housing, said cylindrical base member including support means establishing an additional axial area of engagement with the cylindrical housing, said at least two ribs and said support means defining open arcuate spaces between the cylindrical inner surface and the cylindrical outer surface and establishing the sole areas of supporting engagement between the cylindrical base member and the cylindrical housing when the clamping means is in its clamped position.

6. The router according to claim 5 wherein each of said at least two support ribs and said support means are substantially equally spaced from each other.

7. The router according to claim 5 wherein said cylindrical inner surface of said cylindrical base member includes a pair of parallel, axially extending inner projections, said inner projections defining said support means.

8. The router according to claim 7 wherein each of said at least two support ribs and said support means are substantially equally spaced from each other.

9. The router according to claim 7 wherein said clamping means includes an over-center clamping mechanism.

10. The router according to claim 5 wherein said support ribs include respective planar surfaces in tangential engagement with said cylindrical housing.

11. The router according to claim 7 wherein said support ribs include respective planar surfaces in tangential engagement with said cylindrical housing.

12. The router according to claim 7 wherein each of said at least two support ribs and said support means are substantially equally spaced from each other.

13. The router according to claim 10 wherein each of said at least two support ribs and said support means are substantially equally spaced from each other.

14. The router of claim 7 wherein said slot is disposed between said inner projections in adjacent relationship therwith.