US3383747A - Scaling tool - Google Patents

Description

y 21, 1968 D. M. BROWNE 3,383,747

SCALING TOOL Filed July 12, 1965 I5 Sheets-Sheet 1 May 21, 1968 Filed July 12, 1965 FIGA D. M. BROWNE SCALING TOOL 3 Sheets-Sheet 2 y 21, 1953 D. M. BROWNE 3,383,747

SCALING TOOL Filed July 12, 1965 i 5 sheetksheet 3 United States Patent 3,383,747 2CAL1NG TOOL Donald M. Browne, 3154 Wascana Sta, Victoria, British Columbia, Canada Filed July 12, 1965, @er. No. 470,988 11 Claims. (1. 29-81) an. we... a

ABSTRACT OF THE D1SCLOURE This invention relates to a device employing a plurality of reciprocating rods for removing particles from the surface of a hard material for example rust, scale or the like from metal.

In many of the known devices, the drive mechanism is complicated and/ or expensive. Also in the known devices a plurality of reciprocating rods are used, wherein each rod has an equal angle of incidence with the surface being cleaned. Such positioning fails to provide efiicient cleaning and further requires considerable angular movement of the device with respect to the surface being cleaned.

The known devices are relatively complicated, cumbersome, inefificient pieces of equipment which vibrate excessively and produce extreme noise.

A device constructed in accordance with the present invention overcomes the above difliculties.

In one aspect, the present invention consists of a cleaning device, including a casing, a plurality of rods reciprocally mounted therein and having a portion thereof projecting from a common end of said casing, said projecting portions being angularly related with respect to one another and converging toward one another thereby to provide a plurality of rods for angularly contacting a surface to be cleaned, and drive means reciprocating said rods sequentially.

The invention is illustrated by way of example in the accompanying drawings wherein,

FIG. 1 is a vertical elevation view of a device constructed in accordance with the present invention,

FIG. 2 is a cross-sectional view along section 22 of FIG. 1,

FIG. 3 is a bottom view of FIG. 2,

FIG. 4 is a vertical sectional view of a modified device, and

FIG. 5 illustrates a modified means of securing the rods to a wobble plate adapted to wobble and cause reciprocation of the rods.

Referring now in detail to the drawings, shown in FIG. 1 is a cleaning instrument 1 comprising a tubular casing 5, a drive shaft 6 journalled therein and projecting from one end and a plurality of rods '7, reciprocally mounted in the casing and projecting from the opposite end. The rods '7 and drive shaft 6 project from opposite ends of the housing in the preferred embodiment. The drive shaft, however could, by suitable gear drive, be angularly disposed with respect to the axis of the housing.

The housing consists of a central portion 8, a lower tapered end portion 9 and a top end cover 10. The portions 8 and Q are open ended, cylindrical members overlapping at the junction 11 to provide a shoulder 12 on the inside surface. The purpose of this shoulder will become apparent hereinafter. The housing portions 8 and 9 may be secured together by welding, threading or the like.

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Alternatively the lower end of portion 8 may be tapered inwardly whereby the two portions are retained together by a wedging action.

Interiorly of the casing, and disposed substantially in the tapered portion 9, is a rod guide assembly 13. The guide assembly consists of a pair of spaced apertured discs 14 and 15 interconnected by a bolt and nut assembly 16 and a spacer 17.

The disc 15 bears upon the shoulder 12 while the disc 14- is of Such diameter as to snugly fit into casing portion 9 adjacent the lower, open end of the latter. The bolt and nut assembly consists of a bolt 18 having a head assembly 19 bearing against the outer face of disc 14, a stem 20 which passes through a central aperture 21, in the disc 14 and is threaded into a central aperture 22 in disc 15 and a cap nut 23 which bears against the disc 15. The disc 14 forms an end wall of the casing.

The discs 14 and 15, each having a plurality of apertures therethrough; one for each rod 7 thereby providing guides for the reciprocating rods. The apertures in disc 15 preferably are equi-radially as well as equi-circumferentially spaced while the apertures in disc 14 define substantially an elongated elipse. The latter positioning is evident from FIG. 3 and the purpose of such positioning of the apertures is to allow the rods 7 to be angularly disposed with respect to one another converging inwardly toward the tips. The rod tips further are substantially in alignment along a line transverse to the axis of the housing. The apertures in disc 15 preferably consist of a plurality of radially directed notches in the circumferential edge of the disc. The above positioning of the rod provides means where upon sequential reciprocation of the rods, the tips variably, angularly contact a surface being worked upon. Each of the rods 7 pass through associated apertures in discs 14- and 15. The rods each consist of angular-1y related portions 24 and 25. The rod portion 25 passes through the guide disc 14 and terminates in a work engaging tip 26 while the portion 24 passes through disc 15 and terminates in a hooked end portion 27. The hooked end 27 is adapted to grasp an annular ring member 28.

The rod portion 24 also passes through a disc member 29 which is disposed between the ring 28 and the disc 15. The center portion of member 2) (which may have an indentation thereat) bears against the crown of the nut 23 and is thereby pivotally mounted upon the nut.

- The rods are reciprocate'd by a drive mechanism 36, which, except for a portion of drive shaft 6, is confined within the housing portion 8.

The drive mechanism consists of a drive shaft 6, and a bearing assembly 31, the latter being mounted on an offset end portion of the shaft and adapted to bear against the rod hooked end portions 27.

In the embodiment shown in FIG. 2, the drive assembly further includes a sleeve 33 and attached guide 34.

The drive shaft 6 extends through a bearing 35, frictionally retained in an aperture in cover 10; through the sleeve 33 and terminates in an angularly ofiset spindle 36. The bearing assembly 31 consists of an inner race 33, an outer race 39 and balls 46 disposed therebetween is mounted on the spindle 36. The inner race of the bearing bears against a shoulder 41 disposed between the shaft 6 and the spindle portion 36. A further shoulder 42, on the shaft 6 is adapted to bear against the sleeve end portion 33A, the latter being a flared end portion of the sleeve adapted to bear against the guide 34.

The sleeve, at the opposite end to portion 33A bears against the bearing 35. The cover is detachably secured to the casing by screws 43. It may alternatively be secured by threading a cooperating notch and lug arrangement or other suitable means. The cover being secured, maintains the device in assembled relationship.

The outer race of the bearing, bears against one face of a wobble plate 44. Such face is the one remote from the flange 41. The opposite face of wobble plate 44 bears against the rod hooked portions 27 and maintains the disc 29 in contact with the nut 23.

The bearing illustrated is a modified type ball bearing wherein the inner and outer race are axially offset with respect to one another. A roller hearing may also be used and it will be apparent that an end thrust bearing alternatively may also be used. In the latter case, the spindle portion 36 would be replaced by a planar surface angularly related with respect to the axis of the drive shaft as will be described hereinafter with respect to FIG. 4. In a further alternative, the bearing and pressure plate may be disposed of and the planar surface on the end of the drive shaft may bear directly upon the hooked portion of the rod.

A modified device is shown in FIG. 4 which consists of a tubular casing member 100, a plurality of reciprocating rods 250, a rod guide assembly 200 and a rod driving mechanism 300.

The guide assemly 200 consists of a cylindrical member 201 having a plurality of spaced lugs 202 and 203, adjacent each end thereof and formed integral therewith. The lugs project inwardly from the member 201 and clampingly engage apertured guide discs 204 and 205 at opposed ends thereof. The member 201 snugly and slideably fits into the casing and removal from the lower end is prevented by screws 206 threaded into the casing.

A pin 210, formed integral with disc 205, projects into the casing and the center of a wobble plate 207 bears thereagainst. The discs 204, 205 and plate 207 are apertured to receive the rods 250. Each rod 250 has an enlarged head 251 which bears against a face of the washer 207.

The drive 300 consists of a shaft 301 having an enlarged planar end portion 302 angularly disposed with respect to the axis of the shaft. The outer face of the portion 302 bears directly against the heads 25!; of the rods. The shaft 301 is journalled in a bearing 303 which is secured to a disc 304 adapted to fit into the upper end of the casing. The disc may be screw threaded, notched or otherwise secured to the casing.

In operation of the device shown in FIGS. 1 to 3, the drive shaft of the device is driven by any suitable motivating means. Such rotation causes the bearing on the end thereof to wobble, such wobble causing wobble plate 44-, and disc 29 to wobble about the pivot 23. The ends of the rods are clampingly retained between the wobble plate and the disc and thereby cause the rods to reciprocate.

The guide members may be provided with friction reducing rollers adjacent the apertures and contacting the rods thereby to facilitate reciprocation of the rods.

In the device shown in FIG. 4, the planar end portion 302 wobbles, upon rotation of the shaft, and contact of such washer with the heads of the pins together with the wobble plate 207 causes the rods to reciprocate. The bearing 303 is of such length as to engage a shoulder 305 on the shaft and thereby retain the end portion 302 in engagement with the pins for driving the same. In operation, the casing is grasped by one hand of the operator, while the driving means (an electric drill or the like) is grasped in the other hand.

FIG. 5 illustrates a further modified embodiment wherein the pins are pivotally attached to arms extending outwardly from a central hub portion. Specifically illustrated in this figure are a plurality of pins A pivotally secured by a pin B to an arm C which extends radially outwardly from a wobble plate D. The plate with the arms extending outwardly therefrom replaces the member 207 illustrated in FIG. 4 and the disc 29 and ring 28 illustrated in FIG. 2.

The plate D may include a recess in the lower surface for receiving a ball or rounded end assembly of the pin 210, illustrated in FIG, 4 Or the cap nut 23 illustrated in FIG. 2. In this embodiment, the pins A are flattened to be received in a groove in the end of the arm. The pin and the arm are apertured so as to receive the pin B and this mounting provides a positive control of the reciprocation of the pins when the arms are driven so as to have the hub wobble about a central pivot.

It is obvious that the arms C and pins B may be replaced by a crank arrangement which has an end portion projecting through an aperture in the flattened end portion of the pins.

I claim:

1. A device including a casing having a central longitudinal axis, a plurality of rods reciprocally mounted therein and disposed in spaced relation about said central axis, said rods each having a portion projecting beyond the casing from one end of the latter, a rotatable drive shaft in said casing and having an end portion projecting from the opposite end of said casing and having an opposite end portion within said casing, means comprising a wobble plate pivotally mounted in said casing for operation by rotation of the drive shaft, and means operatively connecting the ends of the rods in the casing to the wobble plate means to cause the rods to be reciprocated by operation of the wobble plate means when the drive shaft is rotated.

2. A device as defined in claim 1 wherein the casing has an end wall and said rods pass through apertures in said end wall, said apertures thereby providing guide means for said rods.

3. A device as defined in claim '1, wherein said rods are pivotally secured to the wobble plate means about a central point, said plate means being pivotally mounted in said casing at said central point for movement in response to said drive means thereby to reciprocate said rods.

4. A device as defined in claim 3 wherein said shaft has a flattened end portion, with a planar surface disposed angularly with respect to the axis of rotation of the shaft, said flattened portion bearing against said wobble plate whereupon rotation of said shaft causes pivotal movement of the pressure plate about said central point.

5. A cleaning device comprising a cylindrical casing having a longitudinal central axis, and a pair of opposite ends transverse to said axis; drive means including a drive shaft journalled in said casing and having an end portion projecting from one end of said casing and the other end of said drive means terminating in a flattened end portion disposed within the casing, said flattened end having a planar surface angularly disposed with respect to the axis of said shaft; a plurality of rods reciprocally mounted in said casing and having a portion thereof projecting beyond the other end of said casing opposite from that of the projecting portion of said drive shaft and converging inwardly toward one another, the ends of the rods within the casing bearing against the flattened end portion of the drive means whereupon rotation of the latter effects reciprocation of said rods.

6. A device as defined in claim 5 wherein said rods are pivotally secured to a wobble plate means pivotally mounted within said casing and adapted to bear against the flattened end portion of said drive shaft.

7. A cleaning device comprising a cylindrical casing having a ledge on the inside surface thereof intermediate the ends of said casing, a guide assembly comprising a pair of discs joined together in axially spaced relationship, one of said discs being supported upon said ledge and the other disc being disposed adjacent one end of said casing; each of said discs having a plurality of apertures, a plurality of rods slidably disposed in associated ones of aligned apertures in said discs and having a portion projecting beyond an end of said casing, the opposite ends of said rods being operatively secured to a disc pivoted to wobble about a pivot pin secured to one of said guide discs and a drive assembly adapted sequentially to reciprocate said rods, said drive assembly comprising a drive shaft journalled in said casing and having a portion projecting therefrom and terminating at the opposite end in an angularly ofiset end portion arranged to drive said pivoted disc whereupon rotation of the disc causes said pivoted disc to wobble and thereby sequentially reciprocate said rods.

8. A device as defined in claim 7 wherein said casing consists of a pair of sections detachably secured together in end-to-end axial alignment.

9. A device as defined in claim 8 including a bearing disposed between said pivoted disc and the offset end portion of said drive shaft.

10. A device as defined in claim 9 wherein said rods converge inwardly toward one another at a point remote from the end of said casing.

11. A device as defined in claim 10 wherein the ends of the rods exteriorly of the casing are substantially in alignment in a plane through the central axis of said casing.

References Cited UNITED STATES PATENTS F WALTER A. SCHEEL, Primary Examiner. JOHN M. NEARY, Assistant Examiner.

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