US3867747A

US3867747A - Power driven file

Info

Publication number: US3867747A
Application number: US444795A
Authority: US
Inventors: Robert E Lee
Original assignee: Individual
Current assignee: Individual
Priority date: 1974-02-22
Filing date: 1974-02-22
Publication date: 1975-02-25
Anticipated expiration: 1992-02-25

Abstract

An electric motor power driven file consisting of an electric motor enclosed in a handle and operatively connected by bevel gears to an adjustable chuck adapted to receive therein the butt end of various sizes and configurations of files, the bevel gears converting the rotational movement of the motor to reciprocal translational motion for the file.

Description

United States Patent [1 1 Lee Feb. 25, 1975 [54] POWER DRWEN FILE FOREIGN PATENTS OR APPLICATIONS 1 lnvemorl Robe" 20th, 246,312 9/1947 Switzerland 29/76 E cana 1 h 49829 232,694 9/1944 Switzerland 29/76 [22] Filed: Feb. 22, 1974 [21] A l N 444 795 Primary ExammerLeomdas Vlachos pp. 0.: Y

I [57] ABSTRACT An electric motor power driven file consisting of an Fie'ld R 76 A electric motor enclosed in a handle and operatively r connected by bevel gears to an adjustable chuck R erenc Cit d adapted to receive therein the butt end of various sizes e es e and configurations of files, the bevel gears converting UNITED STATES PATENTS the rotational movement of the motor to reciprocal 348,664 5/1886 Krayer 29/76 X translational motion for the file. 2,24 ,755 5/1941 Briggs 29/76 X 3,465,601 9/1969 Wezel et al. 29/76 x 1 Clalm, 6 Drawing Flgures POWER DRIVEN FILE BACKGROUND OF THE INVENTION to minimize this time element the priorart discloses rotary type files adapted to be driven by electric drill type structures and the like in the general form of a rotary grinding wheel. However, such filing devices do not provide the desired result as achieved by conventional elongated files operated in a reciprocating manner so that such powered files of the prior art have not been well received by industrial users.

SUMMARY OF THE INVENTION The present invention recognizes theindustrial need for a'power driven file providing the conveniences and advantages of present manual files, and provides a novel solutionthereto which remedies and overcomes all of the deficiencies and disadvantages of presently available power files. The present invention provides a novel power driven file which is of a small and convenient configuration readily held in an individual s hands and whereby a variety of filing blades may be used therewith in an interchangeable manner with each of such blades being reciprocally driven in a manner substantially identical to hand manipulation of the file so that the desired filing is accomplished 'in the desired manner with the volume of work output greatly increased without any decrease or adverse affect in the quality of the'work performed. Y

It is a feature of the present invention to provide a power driven file which is powered by an electric motor.

It is a further feature of the present invention to provide a power driven file which is of a lightweight and compact configuration and which is readily utilizable with filing blades of various sizes and configurations.

Still a further feature of the present invention provides a power driven file which is relatively simple in its construction and which therefore may be readily manufacturedat a relatively low cost and by simple manufacturing methods.

Yet still a further feature of the present invention provides a power driven file which is of a rugged and durable construction and which therefore may be guaranteed by the manufacturer to withstand many years of intended usage.

Still yet a further feature of the present invention provides a power driven file which is easy to use and reliable and efficient in operation.

Yet still a further feature of the present invention provides a power driven file which can be retailed at a sufficiently low price to encourage its widespread use in view of its time saving advantages -over manual file manipulation.

Other features and advantages of this invention will be apparent during the course of the following descript1on.

I BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings forming a part of this specification, and in which like reference characters are employed to designate the same:

FIG. 1 is a perspective view of the power driven file of the present invention;

FIG. 2 is a front elevational view of the file partially broken away to illustrate interior details thereof;

FIG. 3 is a top plan view of the file partially broken away to illustrate interior details thereof;

FIG. 4 is a side elevational view similar to FIG. 2 illustrating a different operating position of the file;

FIG. 5 is an exploded perspective view of the chuck assembly and a typical file blade for use therewith; and

' FIG. 6 is a perspective view of a rattail type file blade intended for use with the power file.

Referring now to the drawings in detail there is illustrated a preferred form of a power driven file constructed in accordance with the principles of the present invention and designated generally in its entirety by the reference numeral 10 and which is comprised of a housing 11, and electric motor 12, a drive assembly 14, a chuck assembly 15, and an optional handle 16. The device 10 is adapted for use with files of various sizes and configurations, such as a flat file 17 having a reduced cross-section butt end 18 adapted to be received in chuck assembly 15; a conical rattail file 19 having a reduced flattened cross-sectional butt end 18, and the like.

The housing 11 is of an elongated generally cylindrical configuration having cylindrical side walls 21, a semi-spherical closed back end wall 22, and an open front end 23 with there being defined interiorly thereof a longitudinally elongated chamber 24.

The motor 12 is of a compact electric motor designed for operation on any suitable electrical voltage, such as volts alternating current, or may be designed for use with battery power, the motor being mounted in the back end of the housing 11 in chamber 24 and having a drive shaft 31 projecting axially from the front end thereof and terminating in a vertical disposed-toothed bevel gear 32.

The drive assembly 14 consists of a horizontally disposed bevel gear 41 rotatably mounted by pin 42 supported on side wall 21 with the bevel gear in meshing engagement with bevel gear 32. The bevel gear 41 has a flat circular top surface 43 on which there is mounted adjacent a peripheral edge therof a vertically extending pin 44 which is pivotally received in an aperture 45 of an elongated generally longitudinally extending drive member 46, the opposite end of the drive member provided with an aperture extending therethrough which is pivotally connected by a pivot pin 51 to a bracket 52 affixed to a back surface 53 of the chuck 15.

The chuck 15 consists of a cylindrical body member 7 55 having cylindrical side walls 56, back surface 53,

ber is provided with a threaded aperture 61 extending radially through side wall 56 and joining with the slot 59 inwardly of the chuck, with there being provided a threaded Allen head-type screw 62 adapted to be threadedly received in aperture 61 for frictionally engaging butt end 18 of a file 17 for removably retaining thefile in the chuck.

As-seenin the drawings, the diameter of body member 55 of chuck 15 measured by side walls 56 is adapted to be slidingly received in the front end 23 of housingll such that the front end portion of chamber 24 servesas a guide way for reciprocal movement 'of the chuck relative to the housing.

In operation, a tile 17 is inserted in chuck l5 and retained in place by Allen head screw 62, after which the motor 12 is electrically energized by being connected by plug 63 and cord 64 to a suitable source of electrical energy which is controlled through a switch 65 mounted in a side wall 21 of the housing 11. The ener-- gization of motor 12 effects the rotation of bevel gear 32 which, in turn, effects the rotation of bevel gear 41 with pin 44 rotating thereabout, the pin 44 moving drive member 46 in a general back-and-forth manner to drive chuck in a reciprocal manner which, in turn, effects the reciprocation of the file 17. Thus, the drive mechanism 14 converts the rotational movement of motor 12 to translational movement for driving the file 17. The maximum forward movement of chuck 15 is illustrated in FIG. 2 with the direction of movement being designated by arrow 70, with the maximum re-' tracted movement of chuck 15 relative to housing 11 being illustrated in FIG. 4 with the direction of movement being designated generally by arrow 71.

The handle 16 is optional and is adapted to be threaded into a portion of side wall 21 and extend normal to the axis of the housing 11 such that an individual may grasp the device 10 with one hand about housing- 11 and a second hand stabilizing the same by handle 16 for the accurate use of the device.

It is to be understood that the form of this invention herewithshown and described is to be taken as a preferred example of the same, and that this invention is an elongated hollow cylindrically shaped housing having a closed back end, an open front end, and cylindrical side wall surfaces;

anelongated file member having a reduced width longitudinally extending flattened shank; anelongated cylindrically shaped compartment defined interiorly of said housing and opening out of said open front end thereof;

a chuck disposed in said front end of said housing compartment projecting outwardly of said front end and guided for reciprocal movement along the' interior front end portion of the side walls of said compartment in a back-and-forth manner along the;

longitudinal axis of said housing, said chuck com-. prising:

an elongated cylindrical body member having a flat front end, a flat back end, and cylindrical side walls of a diameter adapted to be slidingly received in said front end of said housing;

a diametrically extending slot extending longitudinally into said chuck through said chuck front end and adapted to receive therein said reduced width shank of said file blade member therein;

- a threaded opening disposed in said chuck side wall surfaces axially aligned with the diametric axis of said slot and extending radially outwardly from an interior portion of said slot to a position projecting through said side walls of said chuck body member;

a threaded set screw having an allen head type drive socket at an exterior end thereof adapted to be threadedly received in said threaded opening and having an inner end adapted to frictionally engage an edge of said file blade shank inserted into said slot to removably retain said blade affixed to said chuck for simultaneous movement therewith;

an electrically powered motor means disposed in said housing compartment adjacent said back end thereof and having its longitudinal axis disposed parallel to the longitudinal axis of said housing compartment;

a flexible electrical cord having one end electrically connected to said motor with the opposite end thereof projecting outwardly of said housing back end and terminating in an electrical plug adapted to be pluggeed into a conventional source of household electrical energy'to energize said motor from said electrical energy source;

an electrical switch mounted in said housing compartment and having an actuating member project ing exteriorly of said compartment side walls, said electrical switch being electrically wired in series relationship between said electrical cord and said electric motor for controlling the selective energization and de-energization of said electric motor from said source of electrical energy;

a shaft extending axially from a front end surface of said motor pointing in the direction of said housing open front end and rotatively driven by said motor;

' a first bevel gear having its base portion disposed concentric and affixed to the projecting end of said electric motor shaft;

a second bevel gear disposed at a ninety degree angle to the axis of said first bevel gear and rotatively affixed to said housing for rotation interiorly of said housing compartment, said second bevel gear disposed in meshing engagement with the teeth of said first bevel gear;

said'second bevel gear having a flattened top surface disposed concentric with the top edges of the teeth of said gear;

a cylindrical rod shaped pin member having one end affixed to a peripheral edge of said second bevel gear top flat surface with said pin member projecting outwardly therefrom in a direction parallel to the axis of rotation of said second bevel gear, said direction of projection being normal to the plane of said second bevel gear;

a link member of an elongated flat configuration having an aperture extending through each end thereof;

ture of said link member to pivotally secure said link member thereto;

whereby rotational movement of said motor is translated by said first and second bevel gears, said pin member, said link member, and said yoke to translational motion of said chuck relative to said housing to drive said chuck in a reciprocal manner inwardly and outwardly of said housing to effect reciprocal back-and-forth movement of said file blade member affixed to said chuck.

Claims

1. A power driven file comprising, in combination: an elongated hollow cylindrically shaped housing having a closed back end, an open front end, and cylindrical side wall surfaces; an elongated file member having a reduced width longitudinally extending flattened shank; an elongated cylindrically shaped compartment defined interiorly of said housing and opening out of said open front end thereof; a chuck disposed in said front end of said housing compartment projecting outwardly of said front end and guided for reciprocal movement along the interior front end portion of the side walls of said compartment in a back-and-forth manner along the longitudinal axis of said housing, said chuck comprising: an elongated cylindrical body member having a flat front end, a flat back end, and cylindrical side walls of a diameter adapted to be slidingly received in said front end of said housing; a diametrically extending slot extending longitudinally into said chuck through said chuck front end and adapted to receive therein said reduced width shank of said file blade member therein; a threaded opening disposed in said chuck side wall surfaces axially aligned with the diametric axis of said slot and extending radially outwardly from an interior portion of said slot to a position projecting through said side walls of said chuck body member; a threaded set screw having an allen head type drive socket at an exterior end thereof adapted to be threadedly received in said threaded opening and having an inner end adapted to frictionally engage an edge of said file blade shank inserted into said slot to removably retain said blade affixed to said chuck for simultaneous movement therewith; an electrically powered motor means disposed in said housing compartment adjacent said back end thereof and having its longitudinal axis disposed parallel to the longitudinal axis of said housing compartment; a flexible electrical cord having one end electrically connected to said motor with the opposite end thereof projecting outwardly of said housing back end and terminating in an electrical plug adapted to be pluggeed into a conventional source of household electrical energy to energize said motor from said electrical energy source; an electrical switch mounted in said housing compartment and having an actuating member projecting exteriorly of said compartment side walls, said electrical switch being electrically wired in series relationship between said electrical cord and said electric motor for controlling the selective energization and de-energization of said electric motor from said source of electrical energy; a shaft extending axially from a front end surface of said motor pointing in the direction of said housing open front end and rotatively driven by said motor; a first bevel gear having its base portion disposed concentric and affixed to the projecting end of said electric motor shaft; a second bevel gear disposed at a ninety degree angle to the axis of said first bevel gear and rotatively affixed to said housing for rotation interiorly of said housing compartment, said second bevel gear disposed in meshing engagement with the teeth of said first bevel gear; said second bevel gear having a flattened top surface disposed concentric with the top edges of the teeth of said gear; a cylindrical rod shaped pin member having one end affixed to a peripheral edge of said second bevel gear top flat surface with said pin member projecting outwardly therefrom in a direction parallel to the axis of rotation of said second bevel gear, said direction of projection being normal to the plane of said second bevel gear; a link member of an elongated flat configuration having an aperture extending through each end thereof; the aperture at one end of said link member rotatively receiving said pin member projecting therethrough; a U-shaped yoke having a bight portion and opposed parallel leg portions, said yoke bight portion affixed to said back end of said chuck with said leg portions projecting outwardly therefrom straddling the axis of said chuck; a connecting pin extending between said leg members of said yoke adjacent the outermost ends thereof; said connecting pin passing through said other aperture of said link member to pivotally secure said link member thereto; whereby rotational movement of said motor is translated by said first and second bevel gears, said pin member, said link member, and said yoke to translational motion of said chuck relative to said housing to drive said chuck in a reciprocal manner inwardly and outwardly of said housing to effect reciprocal back-and-forth movement of said file blade member affixed to said chuck.