US4606685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Router with dust exhaust
Assignee: Individual
•
Filing: 1984-04-18
•
Granted: 1986-08-19
•
Expires: 2004-04-18
Abstract
Abstract A router comprises a cage supporting a drive unit having a shaft on which a cutter can be fixed. A rest plate is provided with an aperture for moving the cutter therethrough. The rest plate is connected to the cage through two guide columns on which it is displaceable in axial directions of the cutter and arrestable in a selected position. The rest plate is a hollow structure open downwardly where it is closed by a detachable cover having a smooth outer surface. A cavity of the plate communicates with and encircles the aperture 21 for the cutter and grows toward an exhaust connection which extends tangentially to the cutter, i.e. in the direction in which the millings are thrown. The exhaust connection can be connected to an exhauster. Laterally on the rest plate, an adjustable slide stop may be provided having an angled leg which can be brought into a position flush with the bottom surface of the rest plate or moved downward therefrom. A chip screen is mounted for adjustable movement toward and away from the rest plate.
Inventors
- 👤 Peter Maier
- 👤 Karl Attinger
- 👤 Albert Sigel
- 👤 Gernot Hansel
- 👤 Erwin Kutscher
- 👤 Hartmut Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:14
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/0042; B23Q11/0046; B23Q16/00; B23Q16/001; B27; B27C; B27C5/00; B27C5/10; Y; Y10; Y10T; Y10T408/00; Y10T408/18; Y10T409/00; Y10T409/30; Y10T409/30392; Y10T409/304088; Y10T409/306216; Y10T409/306552; Y10T409/306608; Y10T409/308624; Y10T82/00; Y10T82/25; Y10T82/2572; Y10T82/2574; Y10T82/2581
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
267 words
A router, comprising a drive unit housing, a rotatable cutter shaft extending out of said housing for carrying a cutter, guide column means extending out of said housing in the same direction as that of said cutter shaft, a rest plate having a contact surface for engaging a workpiece, said rest plate guided on said column means for movements toward and away from said housing and having an aperture therethrough for the passage of a cutter on the cutter shaft and aligned with the cutter shaft, said rest plate having a cutting cavity in said contact surface surrounding the aperture and surrounding a cutter carried on the shaft, said cavity extending outwardly for exhausting chips cut by the cutter away from the aperture, said rest place having an exhaust connection with an inlet communicating with said cutting cavity for removing chips from the cavity, a chip screen mounted on said rest plate along the periphery thereof, said chip screen extending parallel to the shaft and being lowerable to a maximum lowered position in a direction parallel to the shaft below said contact surface, a slide stop mounted on said rest plate adjacent said chip screen and extending parallel to the shaft and lowerable below the contact surface in a direction parallel to the shaft, and means on said chip screen and slide stop which are engageable at the maximum lowered position of said chip screen so that said chip screen can be lowered only as far as said slide stop is lowered and said chip screen can be lowered to a lesser extent than said slide stop.
Claim 2
Dependent Claim
267 words
A router, comprising a drive unit housing, a rotatable cutter shaft extending out of said housing for carrying a cutter, guide column means extending out of said housing in the same direction as that of said cutter shaft, a rest plate having a contact surface for engaging a workpiece, said rest plate guided on said column means for movements toward and away from said housing and having an aperture therethrough for the passage of a cutter on the cutter shaft and aligned with the cutter shaft, said rest plate having a cutting cavity in said contact surface surrounding the aperture and surrounding a cutter carried on the shaft, said cavity extending outwardly for exhausting chips cut by the cutter away from the aperture, said rest place having an exhaust connection with an inlet communicating with said cutting cavity for removing chips from the cavity, a chip screen mounted on said rest plate along the periphery thereof, said chip screen extending parallel to the shaft and being lowerable to a maximum lowered position in a direction parallel to the shaft below said contact surface, a slide stop mounted on said rest plate adjacent said chip screen and extending parallel to the shaft and lowerable below the contact surface in a direction parallel to the shaft, and means on said chip screen and slide stop which are engageable at the maximum lowered position of said chip screen so that said chip screen can be lowered only as far as said slide stop is lowered and said chip screen can be lowered to a lesser extent than said slide stop.
Claim 3
Dependent Claim
58 words
A router according to claim 1, wherein said guide column means includes a plurality of guide columns, spaced substantially equally from said cutter, said rest plate being adjustable in position along said guide columns and being a hollow body defining said cavity surrounding said aperture, and a cover closing said rest plate having a smooth workpiece engaging surface.
Claim 4
Dependent Claim
23 words
A router according to claim 1, wherein the cavity of said rest plate encircles the aperture therein and is of a spiral configuration.
Claim 5
Dependent Claim
70 words
A router according to claim 1, wherein said rest plate includes an open bottom portion, a cover covering the open bottom portion of said rest plate adapted to rest against the workpiece closing the cavity from the bottom, said cavity extending around a major portion of the aperture and lodging radially and said exhaust connection comprising an exhaust pipe connection to said cavity extending tangentially in respect to the aperture.
Claim 6
Dependent Claim
77 words
A router according to claim 1, wherein said chip screen includes a lower edge having at least one inwardly extending lug extending toward said cutter shaft and said rest plate having a cover portion defining the contact surface, said lug of said chip screen extending parallel to said surface, said rest plate having a recess along a periphery thereof into which said chip screen lug is positionable so that said lug is flush with said contact surface.
Claim 7
Dependent Claim
57 words
A router according to claim 5, wherein said slide stop is adjustably mounted on said rest plate for upward and downward movement, said rest plate having a slide stop leg receiving recess including a slide stop leg carried by said slide stop engageable in said recess, and means for adjusting said leg in an adjustable elevational position.
Claim 8
Dependent Claim
34 words
A router according to claim 6, wherein said slide stop includes an angle shoulder at its upper edge, said chip screen having a finger projecting in a direction toward said shoulder overlying said shoulder.
Claim 9
Dependent Claim
21 words
A router according to claim 7, wherein said slide stop is non-rotatably retained in a guide groove of said rest plate.
Claim 10
Dependent Claim
61 words
A router according to claim 1 wherein said slide stop includes an outwardly extending shoulder, said chip screen having a protruding finger extending over said shoulder for engaging said shoulder when said chip screen is lowered to its maximum extent which is no more than the maximum extent to which said slide stop is lowered with respect to said rest plate.
Claim 11
Dependent Claim
112 words
A router according to claim 9, wherein said slide stop includes a leg extending inwardly with respect to said rest plate, said rest plate having a recess in its contact surface for receiving said leg so that said leg is flush with said contact surface, said chip screen having at least one lug extending inwardly toward said rest plate, said rest plate having at least one additional recess for receiving said lug so that said lug lies flush with said contact surface, said lug and leg extending flush with said contact surface when said slide stop and said chip screen are in their fully raised position with respect to said rest plate.
Claim 12
Dependent Claim
24 words
A router according to claim 10 wherein said rest plate has a rounded corner, said chip screen being rounded and engaged around said corner.
Claim 13
Dependent Claim
24 words
A router according to claim 1, wherein said rest plate has a rounded corner, said chip screen being rounded and engaged around said corner.
Claim 14
Dependent Claim
112 words
A router according to claim 1, wherein said slide stop includes a leg extending inwardly with respect to said rest plate, said rest plate having a recess in its contact surface for receiving said leg so that said leg is flush with said contact surface, said chip screen having at least one lug extending inwardly toward said rest plate, said rest plate having at least one additional recess for receiving said lug so that said lug lies flush with said contact surface, said lug and leg extending flush with said contact surface when said slide stop and said chip screen are in their fully raised position with respect to said rest plate.
References Cited (Backward Citations)
US1581719A
Cited
US3009494A
Cited
US3022806A
Cited
US3062075A
Cited
US3942411A
Cited
SU567901A1
Cited
US4135334A
Cited
US4051880A
Cited
US4397342A
Cited
US4484845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |