US3515357A - Combination can opener and ice crusher - Google Patents

Description

June 2, 1970 K. R. CLARK 3,515,357

COMBINATION CAN OPENER AND ICE CRUSHER Filed May 51, 1967 3 Sheets-Sheet 1 f5 Z 22 k J 50 m 2 /1 l 45 247 I 1 5 6 $194K r I K fi I I 677 76---%/ June 2, 1970 K. R. CLARK 3,515,357

' COMBINATION CAN OPENER AND ICE CRUSHER Filed May 31, 1967 3 Sheets-Sheet 2 June 2, 1970 CLARK 3,515,357

COMBINATION CAN OPENER AND ICE CRUSHER Filed May 31 1967 5 Sheets-Sheet 3 United States Patent O 3,515,357 COMBINATION CAN OPENER AND ICE CRUSHER Kenneth R. Clark, deceased, late of Milwaukee, Wis., by Marilyn J. Clark, executrix, Milwaukee, Wis., assignor to John Oster Manufacturing Co., Milwaukee, Wis., a corporation of Wisconsin Filed May 31, 1967, Ser. No. 643,323 Int. Cl. B02c 13/14, 18/12; B67b 7/38 US. Cl. 241--101 17 Claims ABSTRACT OF THE DISCLOSURE An appliance having can opening mechanism driven through reduction gearing and an ice crushing mechanism driven directly by the single motor. An ice crushing chamber is formed on the can opener housing by a cover member which, together with the can opener housing, forms an enclosure for a rotary driven ice chipping disc.

BACKGROUND OF THE INVENTION The power operated electric can opener has in recent years become extremely popular and is in widespread use in the kitchens of private homes. One example of such a domestic electric can opener is shown in Hubrich Pat. No. 3,254,406. Since the can opener is used so frequently in the kitchen, it must necessarily be stored in a convenient location for easy access many times a day.

Another appliance which has come into increasing use in the home is the power driven ice crusher or ice chipper. An example of such an appliance is shown in Knapp et al. Pat. No. 3,171,605. The ice crusher is conventionally powered by a small electric motor which drives a disc having projections adapted to chip or crush the ice cubes made in an electric refrigerator. The degree of chipping or the size of the ice produced is governed primarily by the shape of the chamber in which the chipping occurs and the size and orientation of the discharge opening for the crushed or chipped ice.

One of the principal objections to the present day ice crushers is that they occupy a substantial amount of counter space in the kitchen and they are used only infrequently. As a consequence, the housewife 'has a tendency to store the ice crusher away in a cabinet where it is rarely used because of its lack of accessibility. Accordingly, it would be desirable to provide an ice crusher which would eliminate the storage and convenience problems associaeted with the present day ice crushers.

SUMMARY OF THE INVENTION The invention is directed to a combined can opener and ice crusher wherein the ice crushing mechanism has been added to the conventional can opener structure. This combination has been accomplished in accordance with the present invention by interconnecting the outer end of the can opener motor shaft to an ice crushing or chipping disc by means of a flexible shaft which drives the disc in rotation about a vertically disposed axis. A simple one-piece plastic cover cooperates with the can opener housing to form an ice crushing chamber within which the rotary disc is received. Cooperating portions of the can opener housing and the cover form the discharge opening and discharge passageway for ice expelled from the ice crushing chamber.

It is an object of the present invention to provide an improved appliance which performs the function of opening cans and crushing ice.

It is a further object of the present invention to provide an improved can opener which also is capable of performing the function of chipping or crushing ice.

It is another object of the present invention to provide "Ice an improved ice crusher which is formed by a simple two-part plastic housing and is driven by a shaded pole motor.

It is still another object of the present invention to provide. an improved can opener having an ice crushing mechanism which rotates about a vertical axis and is connected to the can opener motor by means of a flexible shaft.

Further objects and advantages of the present invention will become apparent as the following description proceeds and the features of novelty which characterize the invention will be pointed out with particularity in the claims annexed to and forming a part of this specification.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a combined can opener and ice crusher embodying my invention;

FIG. 2 is an enlarged vertical sectional view of the combined can opener and ice crusher of FIG. 1 taken on line 22 of FIG. 1;

FIG. 3 is a sectional view taken on line 3-3 of FIG. 2 assuming FIG. 2 shows the complete structure;

FIG. 4 is an enlarged fragmentary sectional view taken on line 4-4 of FIG. 2;

FIG. 5 is an enlarged fragmentary sectional view taken on line 55 of FIG. 2;

FIG. 6 is an enlarged fragmentary sectional view taken on line 6-6 of FIG. 5; and,

FIG. 7 is an enlarged fragmentary sectional view taken on line 7-7 of FIG. 4.

Referring now to the drawings, there is shown in FIG. 1 a combined can opener and ice crusher designated generally by reference numeral 11. The combined appliance includes a generally forwardly located can opening portion 12 and an ice crushing portion 13 which is sup ported on the opposite end of the appliance from the can opening portion. The can opening portion 12 of the combined appliance may be conventional in form and in the disclosed embodiment is substantially identical to the structure shown in Hubrich Pat. No. 3,254,406.

Briefly, the can opening portion 12 is made up of a die cast frame 15 which extends vertically and supports at its upper end a can opening mechanism 17. The can opening mechanism 17 includes a power driven serrated can drive or feed wheel 19 and a can cutting wheel 20. For the purpose of retaining the can cover after it has been severed from the can, there is also supported on the upper end of the frame 15 a magnetic lid retaining means 21.

An operating lever or handle 22 is provided which is pivoted to the frame '15 by an axle 23 and which supports the can cutting wheel 20 at a point displaced from the axis of the axle 23. Thus, upon rotation of the operating lever 23 the can cutting wheel 20 may be moved away from the drive wheel 19 to permit the insertion of the end seam of a can therebetween. Upon return of the operating lever 22 to the position shown in FIGS. 1 and 2, the cutting wheel 20 pierces the cover of the can and is in position to make a continuous cut and thereby sever the cover or lid of the can from the body of the can.

In order to provides the force for rotating the can during the opening operation, there is provided an electric motor 25 which in this case is a shaded pole induction motor secured to the lower end of the frame 15 by means of assembly screws 26, one of which is shown in FIG. 2. The motor 25 is provided with a rotor shaft 27 which supports a conventional shaded pole motor rotor which is not shown. The end of the shaft 27 adjacent the frame 15 is provided with a reduced diameter end portion 28 which is journaled in the frame 15 as shown in FIG. 2.

Adjacent the end portion 28, the shaft 27 is formed with an integral gear 29 which drives the drive or feed wheel 19 through reduction gearing designated generally be reference numeral 30. The reduction gearing 30 includes spur gears which are supported on intermediate shafts as well as a single gear 31 which is carried by a drive wheel supporting shaft 32 which is also journaled in the frame 15. Thus, as the rotor shaft 27 rotates at fairly high speed, the can drive wheel 19 is rotated at a low speed by virtue of the driving connection through the reduction gearing 30.

As will be evident to those familiar with the can opener art, the operating lever 22 is conventionally designed to actuate a switch to energize the motor 25 as the can cutting wheel is moved into the cutting position shown in FIG. 2. The motor then drives the drive wheel 19 causing the can to be rotated with the can cutting wheel 20 in piercing engagement with the cover. On completion of the circular cut on the cover of the can, the pressure on the operating lever 22 is released, thereby deenergizing the motor 25. The structure to perform these functions is more completely set forth and described in the above cited Hubrich patent. It should be understood that any can opener mechanism may be substituted for the mechanism described above without departing from the scope or spirit of the invention. In addition, various types of automatic actuating and cycle terminating means may be used in connection with the can opener mechamsm.

For the purpose of supporting the can opener portion 12 and enclosing the motor and reduction gearing 30, there is provided a housing 35. The housing 35 is secured to the frame 15 at the upper end by a pair of assembly screws 36, one of which is shown in FIG. 2. The lower end of the frame 15 and the housing 35 are secured together by means of a bottom closure plate 37 The frame 15 and the housing 35 together form a motor enclosing chamber which is open at the bottom. The closure 37 serves to complete the motor enclosure.

It should be noted that closure 37 is assembled to the frame 15 by means of screws which extend through two rubber supporting feet 39. Similarly, there are two assembly screws extending through additional supporting feet 39 through openings in the closure 37 into threaded engagement with bosses 40 formed in the housing 35, one of which is illustrated in FIG. 2. As shown in FIGS. 2 and 3, additional assembly screws 38 positioned between the feet 39 extend through closure 37 into threaded engagement with the housing 35. It should be evident, therefore, that the bottom closure 37 serves to interconnect the bottom of the frame 15 and the housing 35 to form a rigid housing structure. The closure 37 is formed with a pair of spaced L-shaped integral tabs 41 which provide means for supporting the power cord 42 by coiling it around tabs 41.

The enclosure formed by the housing 35 and the frame 15 is somewhat L-shaped by virtue of the fact that the motor 25 protrudes outwardly from the base of the frame 15 while the reduction gearing 30 is fairly flat against the surface of the upstanding frame 15. The ice crushing portion 13 of the appliance 11 is positioned more or less above the base leg of the L in a manner so as to conserve or minimize the space required for the appliance. This aspect is, of course, particularly important in view of the fact that a can opener must be stored on the kitchen counter where it continuously occupies a certain space or counter area. By positioning the ice crushing structure above the motor 25 and adjacent the reduction gearing 30, the space occupied by the combination appliance 11 is reduced to a minimum.

For the purpose of simplifying the ice crusher structure as much as possible, the housing 35 itself forms a large part of the ice crusher structure. Assembled to the housing 35 is a cover 45 which cooperates with the housing 35 to form a generally cylindrical ice crushing chamber 46. The chamber 46 is formed by an upwardly extending cylindrical wall 47 and by downwardly extending cylindrical wall 48 formed integrally with the cover 45. The walls 47 and 48 are in overlapping or abutting engagement as is best shown in FIG. 2 with each of the cylindrical walls 47 and 48 comprising about half of the sidewall area of the chamber 46. In the upper half of the chamber 46 the cylindrical wall 48 is bridged by a chordal wall 49 as is best shown in FIG. 4. The chordal wall 49 bridges or interconnects portions of cylindrical wall 48 which are spaced part more than one-quarter of the circumference of the chamber 46. The chordal wall 49 also extends downwardly beyond the bottom of the cylindrical wall 48 into the opening 50 formed in the cylindrical wall 47. There remains below the chordal wall 49 a discharge slot 51 defined by the sides of the opening 50 and the bottom edge of the chordal wall 49.

For the purpose of chipping or crushing ice within the chamber 46, there is provided a slightly conical disc 52 which is supported for rotation about a vertically extending journal bearing 53 received in a boss 54 formed integrally with the housing 35. The disc 52 is secured to the upper end of a stub shaft 55 by a retaining screw 56.

Positioned radially outwardly from the axis of rotation of the disc 52 are integrally formed projections 57 which extend upwardly from the disc for the purpose of chipping or crushing ice positioned within the chamber 46. As is evident from FIG. 4, the projections 57 are generally triangular in shape having sharp leading edges and upwardly projecting tips which engage cubes of ice and tend to reduce them in size through a chipping or crushing action.

Positioned under the disc 52 is an upstanding circular flange 58 which surrounds the bearing 53. The flange 58 is formed integrally with the bottom wall of chamber 46 and serves two very important purposes. It provides a barrier against water produced from melted ice, which water would tend to leak through the bearing 53. In addition, flange 58 prevents any oil or lubricant from bearing 53 from contaminating the ice produced in chamber 46. If any oil is thrown radially outwardly from the bearing 53, it is trapped within the flange 58 where it causes no problem.

In order to drive the disc 52, there is provided a flexible shaft 60 which interconnects the outer end of the motor 25 with the lower end of the stub shaft 55 which supports the disc 52. As may best be seen in FIG. 2, the flexible shaft 60 comprises a helical spring which is flexed through a ninety degree angle and which transmits torque between the horizontally extending rotor shaft 27 and the vertically extending disc supporting shaft 55. The end of the rotor shaft 27 remote from the frame 15 receives over its outer diameter the spring 60. A rubber supporting sleeve 61 is received on the shaft 27 over the spring 60 and serves to support a fan 62 which draws air inwardly through openings 63 in the housing 35. Extending partially around the fan 62 is a baflle 64 which is best shown in FIG. 3. The baffle 64 is received in grooves 65 in the housing 35 as shown in FIG. 2 and is retained upwardly assembled to the housing 35 by means of the bottom closure 37. The fan 62 is positioned within a cut out portion 66 in the baflie 64. As is obvious, the purpose of the bafile 64 is to increase the efficiency of the fan 62 and to direct the cooling air across the motor 25.

Turning attention again to the cover 45 which, with the housing 35, forms the ice crushing chamber 46, we note that the cover is retained in assembled engagement with the housing 35 by means of assembly screws 67 which extend upwardly from within the housing 35 into threaded engagement with the bosses 68 formed on the cover 45. To retain the edges of the cover 45 remote from the assembly screws 67 in engagement with the cover 35, there is provided a tongue and groove engagement involving a tongue 70 and groove '71 formed on the cover 45 and the housing 35 respectively as best shown in FIG. 2. In addition, the adjacent portions of the housing 35 and cover 45 are formed with shallow ribs 72 and grooves 73 respectively as are best'shown in FIG. 4. When the assembly screws 67 are securely tightened into engagement with the cover 45, the cover is drawn down into rigid assembled engagement with the housing 35.

The upper wall of the cover 45 is formed with an opening or passageway 75 which is closed by means of a pivotally mounted lid 76. As is best shown in FIG. 3, the lid 76 is a somewhat L-shaped member having a closure portion 77 and a restriction portion 78. As shown in solid lines in FIG. 3, the lid 76 is in its closed position with the closure portion 77 completely blocking the opening 75 with an outer end 79 extending into a groove 80 Where it is readily accessible for lifting or pivoting the led 76 to the ice loading position.

For the purpose of supporting the lid 76 for pivotal movement, there is provided a U-shaped spring 81 which has trunnion portions 82 extending outwardly through openings in the side walls of the lid 76 as is best shown in FIGS. 5 and 6. The trunnion portions 82 extend outwardly into engagement with integrally molded pivotal supports on the cover 45. These supports each consist of an upwardly facing slot 83 and an opening 84 through which the trunnions 82 extend to prevent their upward displacement.

Turning again to FIG. 3, attention is directed to the dotted line showing of the lid 76 where it is located in the open or ice loading position. In this position, the restriction portion 78 extends across and partially obstructs the opening 75. In order to load ice into the chamber 46, cubes of ice may be positioned on the portion 78 and when the lid is partially closed, such ice cubes will be dispensed into the chamber 46. This lid structure with the closure portion 77 and the restriction portion 78 permits loading of limited quantities of ice at any one time into the chamber 46 and prevents one from inserting hands or fingers into the chamber 46 where they might be injured severely by the projections 57 on the rotating disc 52. The spring 81 is deformed to assemble it to the lid 76 with its trunnion portions 82 extending outwardly through openings in the wall portion and the bight portion snapped beneath integral projections 85, as best shown in FIG. 5.

Integrally formed on the side of the cover 45 is a vertically extending conduit or passageway 86. Communicating with the lower end of the passageway 86 is the ice discharge slot 51. The passageway 86 is open at its lower end thereby permitting the chipped ice to be discharged downwardly into a suitable ice receiving container 87. It should be noted that the housing 35 is provided with an overhanging retaining ledge 88, as is best shown in FIGS. 3, 4, and 7. The retaining ledge 88 is positioned at the bottom of the discharging passageway 86 and provides means for assuring that all of the discharged ice is received in the container 87.

As is evident from FIGS. 4 and 7, the ledge 88 is formed with assembly projections 89 which extend into the interior of the housing 35 and are cemented to the upper wall of the housing to prevent detachment of the ledge 88 from the housing 35. The container 87 is retained snugly against the side of the housing 35 by means of the overhanging retaining ledge 88. Thus, the chipped ice passing out of the discharge slot 51 passes across the ledge 88 and into the container 87. The discharge passageway 86 serves to direct the chipped ice downwardly and eliminates the possibility of any chipped ice being hurled outwardly through the discharge slot 51 at a speed such that it would not fall into the container 87.

While the action of the ice crushing disc 52 is wellknown in the art, brief mention will be made of the operation of the device. As ice cubes are inserted into the chamber 46 through the opening 75, the motor 25 is energized by means of a switch 90 shown in FIG. 3. The motor through its flexible connection 60 causes the disc 52 to rotate at high speed. The chipping projections 57 engage the ice cube breaking oif chips of ice and causing it to bounce around within the chamber 46. As the pieces of ice become small enough to pass through the discharge slot 51, they are ejected into the container 87. The chordal wall 49 serves to aid in the chipping operation thereby preventing ice from moving around a perfectly circular path and causing the ice to move radially thereby increasing the chipping action.

It has been found in the past that small fractional horsepower shaded pole motors, such as motor 25, are unsuitable for use in disc type ice crushers unless they are provided with flywheels to maintain speed under conditions of 'load. The reduction gearing of the can opener serves a flywheel effect and eliminates the necessity for an additional flywheel mechanism. Accordingly, the ice crusher comprises a simple and very compatible combination to the conventional can opener structure. The mode in which the ice crusher has been integrated with the can opener housing is significant in minimizing the space requirements of the combination appliance. In addition, the use of the flexible shaft coupling 60 between the horizontally disposed armature shaft 27 and the vertically disposed disc supporting shaft 55 provides the ultimate in simplicity as far as a power connection between the shafts is concerned.

While there have been shown and described several embodiments of the present invention, it will be apparent to those skilled in the art that numerous changes and modifications may occur, and it is intended in the appended claims to cover all such changes and modifications which fall within the true spirit and scope of the present invention.

What is claimed as new and desired to be secured by Letters Patent of the United States is:

1. A combined can opener and ice crusher comprising a frame supporting a motor and a can opening mechanism, reduction gearing carried by said frame and drivingly interconnecting said motor in continuous driving connection with said can opening mechanism, an ice crushing member driven by said motor with said reduction gearing providing a flywheel elT-ect on said ice crushing member, a housing cooperating with said frame to form an enclosure for said gearing and said motor, said ice crushing member being journaled for rotation on said housing, and a cover overlying said ice crushing member and forming with said housing an ice crushing chamber, a downwardly directed ice discharge passage extending from said chamber, and a. loading door in said cover through which ice may be inserted into said chamber.

2. The combination of claim 1 wherein said motor includes a shaft disposed for rotation about a horizontal axis, said ice crushing member being rotatable about a vertical axis, and a flexible shaft interconnecting said motor shaft and said ice crushing member.

3. The combination of claim 1 wherein said ice crushing chamber is generally circular, said ice crushing member comprising a circular disc having ice chipping projections extending upwardly from its upper face, the axis of said disc being generally coaxial with said chamber, said chamber being formed by circular portions on said cover and said housing.

4. The combination of claim 1 wherein said frame is a vertically extending member with said can opening mechanism positioned at the upper end thereof and outside of said enclosure, said reduction gearing being supported on shafts carried by said frame, means mounting said motor at the lower end of said frame with the shaft of said motor extending horizontally, one end of said shaft drivingly engaging said reduction gearing. a flexible shaft coupling the other end of said shaft to said ice crushing member.

5. In a can opener having a generally L-shaped mechanism with a can opening mechanism and reduction gearing supported on an upright frame with the motor extending outwardly from the lower end of the base of said frame, the improvement comprising an ice crusher positioned above and adjacent to said motor, said motor driving said can opening mechanism through said reduction gearing and driving said ice crusher, a generally L-shaped housing enclosing said reduction gearing and said motor, a cover interfitting with said housing to form an ice crushing chamber above said motor enclosing portion of said housing, said can opening mechanism and said ice crusher both being in continuous driving connection with said motor, said motor includes an armature shaft rotatable about a horizontal axis and said ice crusher comprises a rotary member journaled in said housing for rotation about a vertical axis.

6. The combination of claim wherein said motor and said ice crusher are interconnected by a flexible shaft means.

7. The combination of claim 6 wherein said flexible shaft means including a helical spring between said horizontal shaft and said rotary member.

8. The combination of claim 5 wherein said cover comprises a cup-shaped member open at one side and the bottom, said cover abutting said housing to form a cylindrical chamber within which a rotary ice crushing member is supported for rotation, a vertical passageway formed in said cover to receive and discharge ice from said chamber.

9. A combined can opener and ice chipper comprising a can opening mechanism mounted on a housing, a fractional horsepower shaded pole induction motor having a motor shaft, reduction gearing carried by and mounted within said housing and interconnecting one end of said shaft and said can opening mechanism, an ice chipping disc mounted on said housing for rotation about a verticai axis within a generally cylindrical ice chipping chamber, direct drive means interconnecting the other end of said motor shaft and said ice chipping disc, said reduction gearing including at least one spur gear rotatably mounted within and on said housing such that rotation of said gear provides a flywheel effect for assisting said motor to drive said chipping disc during the chipping of 10. An ice crusher of the type having a conical disc with at least one projection for chipping ice, the improvement comprising a two-piece plastic housing including a base and a cover, means in said base journaling said disc for rotation about a vertical axis, a cylindrical flange extending upwardly from said base and positioned in closely spaced relation to the periphery of said disc, an opening formed in said flange for the discharge of chipped ice, said cover having a downwardly extending cylindrical flange which abuts said base flange to form a generally cylindrical ice crushing chamber, a vertical chordal wall on said cover extending across between spaced portions of said cover range, said chordal wall extending across between saced portions of said cover flange, said chordal wall extending downwardly into said opening to close the upper part thereof leaving a narrow ice discharge slot adjacent the periphery of said disc, said housing being formed with a vertical passageway communicating with said chamber through said discharge slot, said passageway receiving radially discharged chips of ice and directing them downwardly, a frame which supports a motor, said base and said frame forming a motor enclosure, means drivingly interconnecting said motor and said disc, a can opening mechanism is supported on said frame outside of said enclosure, reduction gearing carried by said frame within said enclosure continuously drivingly interconnecting said motor and said can opening mechanism.

11. The combination of claim 10 wherein said motor is provided with an armature shaft having two exposed ends, one of said ends being engaged with said reduction gearing and the other being connected to said disc.

12. A combined can opener and ice crusher comprising a housing supporting a motor and a can opening mechanism, reduction gearing carried by said housing and continuously drivingly interconnecting said motor and said can opening mechanism, an ice crushing member rotatably supported by said housing, a helical spring flexible shaft in power transmitting relationship between said motor and said ice crushing member, said motor includes a rotor shaft which is angularly disposed with respect to the axis about which said ice crushing member rotates, said helical spring flexible shaft extending between said rotor shaft and said ice crushing member.

13. A combined can opener and ice crusher comprising frame means supporting a motor and a can opening mechanism, reduction gearing carried by said frame means and continuously drivingly interconnecting said motor and said can opening mechanism, an ice crushing member driven by said motor, a housing cooperating with said frame to form an enclosure for said gearing and said motor, said housing including a horizontal wa l in which said ice crushing member is journaled and an upstanding circular flange surrounding said member, a cover overlying said ice crushing member and formed with a depending flange which cooperates with said housing flange to define an ice crushing chamber, said housing being formed at one side of said chamber with central recess means and groove means, said cover being formed with tongue means insertable into said housing recess means and rib means which is slidably receivable in said housing groove means whereby said cover and said housing are rigidly securable together.

14. The combined can opener and ice crusher of c aim 13 including fastening means for locking said housing and said cover together on the other side of said chamber.

15. The combined can opener and ice crusher of claim 14 wherein said cover rib means is an inverted U-shaped rib and said tongue means extends downwardly from the bight portion of said rib, said housing groove means having a complementary configuration to cooperate with said cover rib in interlocking relationship.

16. A combined can opener and ice chipping electrical appliance comprising a can opening mechanism mounted on a housing, a fractional horsepower motor having a motor shaft reduction gearing interconnecting said motor shaft and said can opening mechanism, an ice chipping means mounted on said housing for rotation within an ice chipping chamber in said appliance, said reduction gearing including at least one spur gear rotatably mounted within and on said housing such that the rotation of said gear provides a flywheel effect for assisting said motor to drive said ice chipping means during the chipping of ice.

17. The combined can opener and ice chipping electrical appliance of claim 16 wherein said reduction gearing is connected at one end of said motor shaft and said ice chipping means is connected at the other end of said motor shaft.

References Cited UNITED STATES PATENTS 2,554,265 5/1951 Parovel 30-4 2,839,250 6/1958 Brockman. 2,899,140 8/ 1959 Hellyer. 3,051,401 8/1962 Huck. 3,146,555 9/ 1964 Posener. 3,254,406 6/1966 Hubrich s 30-4 ROBERT C. RIORDON, Primary Examiner D. G. KELLY, Assistant Examiner U.S. Cl. X.R. 304; 241-l88 Patent No. 3,515,357 June 2, 1970 Kenneth R. Clark, deceased, by Marilyn J. Clark, Executrix at error appears in the above identified It is certified th ent are hereby corrected as patent and that said Letters Pat shovm below:

line 12, "part" should read apart Column 5,

Column 4 Column 7, line 58, "range" line 18, "led" should read lid should read flange lines 58 to 60, cancel "said chordal wall extending across between saced portions of said cover flange," Column 8, line 46, "shaft reduction" should read shaft,

reduction Signed and sealed this 16th day of March 1971.

(SEAL) Edward M. Fletcher, Jr.

Commissioner of Patents Attesting Officer

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