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US 5,224,803 AGranted
Router device
OwnerGuy Lallierinventor
Life of this patent
Estimating the term…
Abstract
A router attachment for adapting a conventional screw gun for cutting sheets of drywall material includes a housing that is removably securable to the housing of the screw gun, an input shaft rotatably mounted in the housing for coupling with the screwdriver shaft of the screw gun, an output shaft rotatably mounted in the housing for coupling with a router bit and a step-up gear assembly for associating the input and output shafts so that rotation of the input shaft at a first rate of rotation drives rotation of the output shaft at a second, higher rate of rotation.
Claims26
A router attachment for a rotary output device, said rotary output device including a rotary output device housing, rotary output member rotatable relative to the housing and means for driving rotation of the rotary output member relative to the housing, comprising;
- router attachment housing means for removably securing the router attachment to the rotary output device housing;
- input means, rotatably mounted in the router attachment housing, for coupling with the rotary output member of the rotary output device;
- output means, rotatably mounted in the router attachment housing, for coupling the router attachment with a router bit;
- step-up means for operatively associating the input means and output means so that rotation of the input means at a first rate of rotation drives rotation of the output means at a second rate of rotation and the second rate of rotation is higher than the first rate of rotation;
- wherein the input means comprises an input shaft extending from a first end to a second end and means for coupling the first end of the input shaft with the rotary output means;
- wherein the output means comprises an output shaft extending from a first end to a second end and means for mounting a router bit on the second end of the output shaft, wherein the axis of said input and output shafts are generally parallel;
- and
- wherein said step-up means comprises,
- (a) an outer gear concentrically mounted on the second end of the input shaft and having inner and outer diametrical surfaces, wherein a plurality of circumferentially spaced apart first gear teeth are defined in said inner diametral surface;
- and
- (b) an inner gear concentrically mounted on the first end of the output shaft and having an outer diametral surface, wherein a plurality of circumferentially spaced apart gear teeth are defined in said outer diametral surface and wherein the inner gear is eccentrically mounted within the outer gear so that the first gear teeth engage the second gear teeth.
8 more elements
A router attachment for adapting a drywall screw gun for cutting sheets of drywall material, said drywall screw gun including a screw gun housing, a rotary output screw driver shaft, rotatable relative to the screw gun housing, and an electric motor for driving rotation of the screw driver shaft, comprising:
- a router attachment housing extending from an input end, having an input opening defined therein, to an output end, having an output opening defined therein;
- means for removably securing the input end of the router attachment housing to the screw gun housing;
- an input shaft rotatably mounted in the router attachment housing and extending from a first end to a second end, said input opening of the router attachment housing providing access to the first end of the input shaft;
- means for coupling the first end of the input shaft with the rotary output screwdriver shaft of the screw gun;
- an output shaft rotatably mounted in the router attachment housing and extending from a first end to a second end, said output opening of the router attachment housing providing access to the second end of the output shaft;
- step-up means for operatively associating the second end of the input shaft with the first end of the output shaft so that rotation of the input shaft at a first rate of rotation drives rotation of the output shaft at a second rate of rotation and the second rate of rotation is higher than the first rate of rotation;
- means for mounting a router bit on the second end of the output shaft;
- and
- wherein the step-up means comprises;
- (a) an outer gear concentrically mounted on the second end of the input shaft and having inner and outer diametrical surfaces, wherein a plurality of circumferentially spaced apart first gear teeth are defined in said inner diametral surface;
- and
- (b) an inner gear concentrically mounted on the first end of the output shaft and having an outer diametral surface, wherein a plurality of circumferentially spaced apart second gear teeth are defined in said outer diametral surface and wherein the inner gear is eccentrically mounted within the outer gear so that the first gear teeth engage the second gear teeth.
9 more elements
A router attachment for adapting a drywall screw gun for cutting sheets of drywall material, said drywall screw gun including a screw gun housing, a rotary output screw driver shaft, rotatable relative to the screw gun housing, and an electric motor for driving rotation of the screw driver shaft, comprising:
- a router attachment housing extending from an input end, having an input opening defined therein, to an output end, having an output opening defined therein;
- means for removably securing the input end of the router attachment housing to the screw gun housing;
- an input shaft rotatably mounted in the router attachment housing and extending from a first end to a second end, said input opening of the router attachment housing providing access to the first end of the input shaft;
- means for coupling the first end of the input shaft with the rotary output screwdriver shaft of the screw gun;
- an output shaft rotatably mounted in the router attachment housing and extending from a first end to a second end, said output opening of the router attachment housing providing access to the second end of the output shaft, wherein the axis of said input and output shafts are generally parallel;
- step-up means for operatively associating the second end of the input shaft with the first end of the output shaft so that rotation of the input shaft at a first rate or rotation drives rotation of the output shaft at a second rate of rotation and the second rate of rotation is higher than the first rate of rotation;
- means for mounting a router bit on the second end of the output shaft;
- and
- wherein said step-up means comprises,
- (a) an outer gear concentrically mounted on the second end of the input shaft and having inner and outer diametral surfaces, wherein plurality of circumferentially spaced apart first gear teeth are defined in said inner diametral surface;
- and
- (b) an inner gear concentrically mounted on the first end of the output shaft and having an outer diametral surface, wherein a plurality of circumferentially spaced apart second gear teeth are defined in said outer diametral surface and wherein the inner gear is eccentrically mounted within the outer gear so that the first gear teeth engage the second gear teeth.
9 more elements
A router attachment for a rotary output device, said rotary output device including a rotary output device housing, rotary output member rotatable relative to the housing and means for driving rotation of the rotary output member relative to the housing, comprising:
- router attachment housing means for removably securing the router attachment to the rotary output device housing;
- input means, rotatably mounted in the router attachment housing, for coupling with the rotary output member of the rotary output device, said input means comprising an input shaft extending from a first end to a second end and means for coupling the first end of the input shaft with the rotary output means;
- output means, rotatably mounted in the router attachment housing, for coupling the router attachment with a router bit, said output means comprising an output shaft extending from a first end to a second end and means for mounting a router bit on the second end of the output shaft;
- and
- step-up means for operatively associating the input means and output means so that rotation of the input means at a first rate of rotation drives rotation of the output means at a second rate or rotation and the second rate of rotation is higher than the first rate of rotation, said step-up means comprising,
- (a) an outer gear concentrically mounted on the second end of the input shaft and having inner and outer diametral surfaces, wherein a plurality of circumferentially spaced apart first gear teeth are defined in said inner diametral surface;
- and
- (b) an inner gear concentrically mounted on the first end of the output shaft and having an outer diametral surface, wherein a plurality of circumferentially spaced apart second gear teeth are defined in said outer diametral surface and wherein the inner gear is eccentrically mounted within the outer gear so that the first gear teeth engage the second gear teeth.
5 more elements
A method for adapting a drywall screw gun for cutting sheets of drywall material, said drywall screw gun including a screw gun housing, a rotary output screwdriver tip rotatable relative to the screw gun housing and an electric motor for driving rotation of the screwdriver shaft, comprising:
- removably securing a router attachment to the screw gun,
- said router attachment comprising:
- router attachment housing means for removably securing the router attachment to the screw gun housing;
- input means, rotatably mounted in the router attachment housing, for coupling with the screw driver shaft of the screw gun;
- output means, rotatably mounted in the router attachment housing, for coupling the router attachment with a router bit;
- step-up means for operatively associating the input means and output means so that rotation of the input means at a first rate of rotation drives rotation of the output means at a second rate or rotation and the second rate of rotation is higher than the first rate of rotation;
- and
- wherein said step-up means comprises,
- (a) an outer gear concentrically mounted on the second end of the input shaft and having inner and outer diametral surfaces, wherein a plurality of circumferentially spaced apart first gear teeth are defined in said inner diametral surface;
- and
- (b) an inner gear concentrically mounted on the first end of the output shaft and having an outer diametral surface, wherein a plurality of circumferentially spaced apart second gear teeth are defined in said outer diametral surface and wherein the inner gear is eccentrically mounted within the outer gear so that the first gear teeth engage the second gear teeth.
8 more elements
Dependencies are inferred from the claim text.