Limit stops for a router depth of cut adjustment mechanism
First Claim
1. A router comprising:
- a motor housing with an external cylindrical portion;
a base with a cylindrical bore for slidably receiving therein said cylindrical portion of said motor housing;
means for preventing relative rotation between said motor housing and said base;
rotatable depth of cut adjustment means surrounding and cooperating with said motor housing and said base for effecting relative longitudinal displacement of said motor housing with respect to said base; and
means for adjustably setting limits on the range of angular rotation of said rotatable depth of cut adjustment means including;
a first beveled annular surface on said adjustment means at one longitudinal end thereof;
a second beveled annular surface on one of said motor housing and said base adjacent said first beveled annular surface, said first and second beveled annular surfaces together forming a V-shaped annular groove;
a tab on said adjustment means extending toward and terminating before said first beveled annular surface;
a first generally circular stop ring rotatable along said annular groove, said first stop rinq including a first interfering projection extending into the path of travel of said adjustment means tab;
a second generally circular stop ring rotatable along said annular groove adjacent said first stop ring, said second stop ring including a second interfering projection extending into the path of travel of said adjustment means tab; and
means for setting the angular positions of said first and second stop rings along said annular groove with said first and second projections flanking said adjustment means tab so that said projections define limits on the extent of angular rotation of said adjustment means.
1 Assignment
0 Petitions
Accused Products
Abstract
A portable electric router having a depth of cut adjustment mechanism including an adjustment ring which engages a screw thread on the motor housing and rotationally engages the router base. There is further provided an arrangement for preventing relative rotation between the motor housing and the base. The adjustment ring is formed as a split ring with projections adjacent opposite sides of the split, each with a frusto-conical camming surface. A circular clamp knob mounted for threaded rotation on a bolt passing through the projections radially with respect to the router motor housing bears against the camming surfaces so as to squeeze the ring in order to effect a clamping action as the knob is moved inwardly. In order to provide limit stops for preset depths of cut, a pair of stop rings are provided which are angularly rotatable on the router base. Each of the stop rings includes an interference projection and the adjustment ring has a tab fixedly mounted thereon which extends to a point between the interfering projections. The stop rings may be fixed to the router base to limit the range of angular rotation of the adjustment ring.
73 Citations
15 Claims
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1. A router comprising:
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a motor housing with an external cylindrical portion; a base with a cylindrical bore for slidably receiving therein said cylindrical portion of said motor housing; means for preventing relative rotation between said motor housing and said base; rotatable depth of cut adjustment means surrounding and cooperating with said motor housing and said base for effecting relative longitudinal displacement of said motor housing with respect to said base; and means for adjustably setting limits on the range of angular rotation of said rotatable depth of cut adjustment means including; a first beveled annular surface on said adjustment means at one longitudinal end thereof; a second beveled annular surface on one of said motor housing and said base adjacent said first beveled annular surface, said first and second beveled annular surfaces together forming a V-shaped annular groove; a tab on said adjustment means extending toward and terminating before said first beveled annular surface; a first generally circular stop ring rotatable along said annular groove, said first stop rinq including a first interfering projection extending into the path of travel of said adjustment means tab; a second generally circular stop ring rotatable along said annular groove adjacent said first stop ring, said second stop ring including a second interfering projection extending into the path of travel of said adjustment means tab; and means for setting the angular positions of said first and second stop rings along said annular groove with said first and second projections flanking said adjustment means tab so that said projections define limits on the extent of angular rotation of said adjustment means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification