Plunge router

• US 5,207,253 A
• Filed: 03/20/1992
• Issued: 05/04/1993
• Est. Priority Date: 03/20/1992
• Status: Expired due to Term

• Current Assignee: One World Technologies (Techtronic Industries Company Limited)
• Original Assignee: Ryobi Motor Products Incorporated (Techtronic Industries Company Limited)
• Inventors: McCurry, Ronald C., Hoshino, Kiyo
• Primary Examiner(s): BRAY, WAYMOND D
• Application Number:
  US07/855,836
• Time in Patent Office: 410 Days
• Field of Search: 409/182, 144/134 R, 144/134 D, 144/136 R, 144/136 C, 144/371, D 8/67
• US Class Current: 144/136.95
• 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.]

Abstract

A portable electric plunge router (10) having an improved housing (20) including a right handle (28) and a left handle (30) each including an elongated portion (32) and a hand rest lobe portion (34). The handles of the router are conveniently gripped in two positions corresponding to a plunge operation and guided movement position and a detail or free-hand cutting position. In the plunge or guided cutting position, the elongated portion (32) of the handles are gripped. In the detailed or free-hand cutting position, the hand rest lobe portions (34) of the handles (28) and (30) are gripped while steadying the router by sliding a portion of the user'"'"'s hands along the surface of the workpiece (52). An upper surface (36) of the hand rest lobe portion (34) extends radially outwardly and downwardly from the elongated portion (32) of the handles (28) and (30). A bridging portion (38) encloses wiring to switches disposed on the handles (28) and (30). A power switch (40), a power hold-on switch (42) and a speed control switch (48) are preferably located on the right handle (28). A feed release (44) and lock-down switch (46) are preferably disposed on the left handle (30).

Claims

1. A portable plunge router for cutting a workpiece comprising:

a base having a planar work engaging surface;

a plurality of guides affixed to the base and extending generally perpendicularly away from the work engaging surface of the base;

a housing mounted on said guides for limited movement along a central axis towards and away from the base;

a motor having a shaft rotatable about the central axis, the motor being disposed in the housing;

a tool chuck secured to the shaft of the motor; and

a right and left handles secured to right and left sides of the housing, respectively, each handle having an elongated portion which is elongated in the direction of the central axis and a hand rest lobe portion disposed at the end of each handle closest to the base, wherein the elongated portion of each handle is a first hand grip grippable by a hand above the hand rest lobe portion in a plunge position with the hand resting on top of the hand rest lobe portion, and wherein each hand rest lobe portion is a second hand grip grippable by the hand while another portion of the same hand is enabled to slide on the workpiece in a detail cut position.

2. The portable router of claim 1 wherein the hand rest lobe portion extends radially outward from the elongated portion of the handle.

3. The portable router of claim 1 wherein the hand rest lobe has an upper surface extending radially outwardly from the elongated portion and slanting toward the base to provide a gradual transition between the elongated portion and the hand rest lobe portion.

9. The invention as defined in claim 1 and further comprising at least one control switch on at least one of said elongated handles.

10. The invention as defined in claim 9 wherein said control switch is elongated for access by a hand at said first hand grip and access by a hand at said second hand grip.

11. The invention as defined in claim 10 wherein said control switch is a lock down switch.

4. A portable electric plunge router comprising:

an electric motor;

housing means for receiving said motor, said housing means including a base having a work engaging surface and having means for controlling operation of the router;

a pair of elongated handles disposed at spaced locations on the housing;

a bridging portion connecting each of said handles to said housing means across a substantial portion of the length of the handles;

hand rest lobe portions formed on an end of each handle closest to the base of the housing means, the hand rest lobes extending outwardly away from an elongated portion of the handles with a gradual transition between the hand rest lobes and the elongated portion of the handles; and

a plurality of control switches disposed on said handles;

means extending through said bridging portions for electrically connecting said control switches to the means for controlling operation of the router.

5. The portable electric router of claim 4 wherein the control switches disposed on the handles comprise a power switch, a power hold on switch, a feed release switch, a lock down switch and a speed control switch.

6. The portable electric router of claim 4 wherein the control switches disposed on one of the handles comprise a power switch and a power hold on switch, and the control switches disposed on the other of the handles comprise a feed release switch and a lock down switch.

7. The invention as defined in claim 4 wherein at least one of said plurality of switches is a lock down switch on at least one of said elongated handles.

8. The invention as defined in claim 4 wherein at least one of said plurality of switches is elongated for access by a hand at said at least one elongated handle and access by a hand at said respective hand rest lobe.