US3754296A

US3754296A - Rotary flail type chipping head

Info

Publication number: US3754296A
Application number: US00208711A
Authority: US
Inventors: G Talbert
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-12-16
Filing date: 1971-12-16
Publication date: 1973-08-28
Anticipated expiration: 1990-08-28

Abstract

A cylindrical body for concentric mounting on a driven rotary shaft and including peripherally spaced radial openings outwardly from which tine-type elongated members project. The tine members extend generally radially of the cylindrical body and are supported at their inner ends for lateral swinging of the outer ends of the tines in all directions to limit positions of deflection displaced approximately 10* relative to a radial disposition. Further, the radial innermost ends of the tines are supported from the cylindrical body member in a manner such that the tines will be biased, by centrifugal force, to radially extending positions upon rapid rotation of the body about its center axis.

Description

United States Patent Talbert Aug. 28, 1973 [5 1 ROTARY FLAIL TYPE CHIPPING HEAD 2,851,028 9/1958 Asbury 125/5 3,380,094 4/1968 Comstock... [761 Inventor: Tame", 102 3,193,908 7/1965 White 15/93 R Abilene, Kans. 67410 [22] Filed: Dec. 16, 1971 Primary Examiner-Leon G. Machlin 1 J b 1 pp No: 208,711 A: omey Harvey B aco son [57] ABSTRACT 52 U.S. c1. 15/236 R, 29/81 1., 125/5 A cylindrical body for concentric mounting on a driven [51] Int. Cl. 344d 3/16 rotary shaft and including p ip y spaced radial {58] Field of Search 15/236 R, 93 R, 92, openings outwardly from which timmype eiongated 9 81 81 members project. The tine members extend generally 81 125/3 114/222 144/115; 145/4 radially of the cylindrical body and are supported at their inner ends for lateral swinging of the outer ends {56] References Cited of the tines in all directions to limit positions of deflec- UNITED STATES PATENTS tion displaced approximately 10 relative to a radial 2,952,066 9/1960 Pedersen 29 81 L dis osition. Furth the al nn rm t nds f th 1,153,738 9/1915 Van De Voorde l5/l04.l4 tines are supported from the cylindrical body member 2,746,127 5/1956 Jaques 29/81 J in a manner such that the tines will be biased, by ceng tl 'l' 8 trifugal force, to radially extending positions upon u OUX 1,829,531 10/1931 Neilsen 144/115 UX rapid of the body about center 1,347,299 7/1920 Smith et a] 144/115 UX 8 Claims, 6 Drawing Figures /0 /2 l4 f l .l 20 42 24 36 34 2 T 48 s-%--1 4 1 n/ lJj/l/I/ 1 44 26/ 13 32 LI .U /6

.Patented Aug. 28, 1973 3,754,29fi

1 ROTARY FLAIL TYPE CHIPPI NG HEAD The chipping head of the instant invention is designed to be utilized in many environments. It can be utilized to accomplish light peening operations, to cut carbon deposits, to rough finish epoxies of all types, to clean molds and to remove many various types of surface coatings such as mineral deposits, paints and varnishes, adhesives, etc. The chipping head is constructed in a manner whereby the tines thereof may be readily replaced so as to be particularly adapted for a given cleaning or chipping operation. If relatively hard materials are to be removed from hard surfaces, extremely hard tines may be utilized and tines constructed of softer materials may be utilized to remove softer coatings or deposits from less hard surfaces. Further, the chipping head is constructed in a manner whereby it may be used singly or in conjunction with one or more similar chipping heads.

The main object of this invention is to provide a rotary chipping head constructed in a manner so as to be adaptable to many different chipping and surface coating removing operations.

Another object of this invention, in accordance with the immediately preceding object, is to provide a rotary chipping head including flail type tines that may be readily removed and replaced by tines of other types.

Yet another object of this invention is to provide a rotary chipping head that is particularly well adapted to be utilized either singly or in conjunction with one or more similar chipping heads.

A final object of this invention to be specifically enumerated herein is to provide a rotary flail type chipping head in accordance with the preceding objects which will conform to conventional forms of manufacture, be of simple construction and easy to use so as to provide a device that will be economically feasible, long lasting and relatively trouble free in operation.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIG. 1 is a fragmentary perspective view of a conventional form of motorized grinder with a preferred form of the chipping head of the instant invention mounted on the rotary output shaft of the grinder;

FIG. 2 is a fragmentary side elevational view of the grinder and chipping head illustrating one manner in which the chipping head may be utilized to remove surface scale or coatings;

FIG. 3 is a top plan view of the rotary chipping head with a portion thereof being broken away and illustrated in horizontal section;

FIG. 4 is an enlarged vertical sectional view taken substantially upon the plane indicated by the section line 4-4 of FIG. 3 and illustrating the manner in which the flail-type tines of the chipping head may be laterally deflected at their outer ends;

FIG. 5 is an exploded perspective view of the body portion of the chipping head; and

FIG. 6 is an enlarged fragmentary horizontal sectional view further illustrating the manner'in which the flail-type tine members may be laterally deflected.

Referring now more specifically to the drawings the numeral 10 generally designates a power grinder of the type including a rotary output shaft 12 upon which a pair of annular abutments l4 and 16 are supported against relative movement away from each other.

The rotary chipping head of the instant invention is referred in general by the reference numeral 18 and is clampingly secured on the shaft 12 between the

abutments

14 and 16. The abutment 14 may be fixed stationary relative to the shaft 12 and the abutment 16 may be in the form of a washer secured on the shaft 12 by means of a nut 18 threadedly engaged with the shaft 12.

The rotary chipping head 20 includes a generally cylindrical body 22. The body 22 comprises a first inner section 24 and a second outer section 26. The section 24 includes an end wall 28 including a peripheral cylindrical wall portion 30 and the section 26 includes an end wall 32 and a slightly larger diameter cylindrical peripheral wall 34. The

end walls

28 and 32 are provided with

central apertures

36 and 38 and the peripheral cylindrical wall 34 of the section 26 includes evenly circumferentially spaced radial bores 40.

It may be seen from FIG. 4 of the drawings that the

sections

24 and 26 may be secured on the shaft 12 between the abutments l4 and 16 with the shaft 12 snugly received through the

apertures

38 and 36 in the

sections

24 and 26. It may also be seen that the end of the cylindrical peripheral wall 34 of the section 26 remote from the end wall 32 is coplanar with the outer surface of the end wall 28 of the section 24 when

sections

24 and 26 are clamped between the abutments l4 and 16 on the shaft 12. Further, it may also be seen that the peripheral wall 30 of the section 24 has its outer surface spaced radially inwardly of the inner surface of the outer peripheral wall 34 of the section 26 thereby defining an annular space 42 between the

peripheral walls

30 and 34.

The rotary chipping head 20 additionally includes a plurality of headed tines 44 including pointed ends 46 on their ends opposite from the heads 48. The heads 48 are generally disc-shaped and circular in plan. The heads are concentric with the center axes of the tines 44 and the tines 44 are first inserted pointed end first through the bores 40 from the inner ends thereof until the heads 48 abut the inner surface of the peripheral wall 34 of the section 26. Thereafter, the section 24 is telescoped within the open end of the section 26 and held in position until the head 20 is mounted on the shaft 12 between the abutments l4 and 16.

It will be noted from FIGS. 4 and S of the drawings that the radial extent of the annular space 42 is greater than the axial thickness of the heads 48 and that the diameter of the bores 40 is slightly greater than the diameter of the tines44 adjacent the heads 48. Accordingly, the tines 44 may be angularly displaced 10 in all directions from positions extending radially of the axes of the

apertures

36 and 38.

It will be readily apparent that the tines 44 are shaped like headed nails and it is pointed out that there are many different types of nails that may be advantageously used as the tines 44. Hardened masonry nails may be used as the tines 44 when the chipping head 20 is to be utilized in removing heavy rust deposits, and cutting carbon deposits, etc. However, nails of softer materials may be utilized when the chipping head 20 is to be utilized to remove softer coatings. Of course, the

many various types of nails which may be utilized as the tines 44 are presently manufactured in extremely large quantities and may be purchased inexpensively. Therefore, the chipping head 20 of the instant invention, by its unique design enabling it to utilize various different types of nails already commercially available, provides a rotary chipping head that may be inexpensively used in numerous environments.

From FIG. 2 of the drawings it may be seen that when the grinder is positioned at an angle relative to the surface 50 to be acted upon by the chipping head 20, the tines 44 in contact with the surface 50 will be deflected and thus caused to sweep across the surface 50 in frictional engagement therewith in order to remove a coating on the surface 50. Further, as hereinbefore set forth, if the grinder 10 is provided with a shaft 12 of increased length, a plurality of heads may be mounted on that shaft in size-by-side relation.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction andoperation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

What is claimed as new is as follows:

1. A rotary chipping head for mounting on'a rotary shaft between two axially spaced abutments on said shaft, said chipping head including a generally regular body having an outer periphery and a central passage formed therethrough for receiving said shaft, a plurality of elongated tines, each one of said tines being longer than the radius at said regular body, said tines and body including means for supporting said tines from peripherally spaced outer peripheral portions of said body with said tines disposed in a plane normal to the center axis of said passage and their radial innermost end portions universally supported from said body for limited angular displacement of said tines in all directions in and on both sides of said plane relative to positions extending radially of said passage, said means including outer wall portions spaced about said periphery, disposed generally normal to radii of said passage and having radial bores formed therethrough, said means further including diametrically enlarged heads of greater diameter than said bores formed on the inner ends of said tines, said tines being loosely received through said bores with said heads abutting the inner surface portions of said wall portions disposed about said bores.

2. The combination of claim 1 wherein said tines are constructed of rigid metal.

3. The combination of claim 1 wherein said peripherally spaced outer peripheral wall portions comprise spaced portions of an outer cylindrical wall carried by said body, said body also including a removable inner cylindrical wall spaced inwardly from said outer cylindrical wall and defining an annular space extending about said body immediately inwardly of said outer cylindrical wall, the heads of said tines being disposed in said annular space.

4. The combination of claim 3 wherein said body includes a first end wall and said outer cylindrical wall is carried by said first end wall, said body including a second end wall axially spaced from said first end wall and from which said inner cylindrical wall is supported, said inner cylindrical wall projecting laterally from said second end wall toward said first end wall and being loosely telescopingly received within the confines of said outer'cylindrical wall.

5. The combination of claim 4 wherein the end of said inner cylindrical wall adjacent said first end wall abuts against the latter and the outer surface of the second end wall is generally coplanar with the end of the outer cylindrical wall remote from the first end wall.

6. The combination of claim 5 wherein each of said end walls is provided with a central aperture defining the opposite ends of said axial passage.

7. The combination of claim 1 wherein said tines comprise headed nails.

8. The combination of claim 3 wherein the diameter of said tines in the areas thereof extending through said bores, the diameter of said bores, the axial thickness of said heads and the radial thickness of said annular space being such to allow abutment of opposite side diametrically opposite portions of said heads with the inner and outer cylindrical walls and axially spaced diametrically opposite portions of said tines with the portions of said outer peripheral wall defining the inner and outer ends of said bores to limit angular displacement of said tines.

Claims

1. A rotary chipping head for mounting on a rotary shaft between two axially spaced abutments on said shaft, said chipping head including a generally regular body having an outer periphery and a central passage formed therethrough for receiving said shaft, a plurality of elongated tines, each one of said tines being longer than the radius at said regular body, said tines and body including means for supporting said tines from peripherally spaced outer peripheral portions of said body with said tines disposed in a plane normal to the center axis of said passage and their radial innermost end portions universally supported from said body for limited angular displacement of said tines in all directions in and on both sides of said plane relative to positions extending radially of said passage, said means including outer wall portions spaced about said periphery, disposed generally normal to radii of said passage and having radial bores formed therethrough, said means further including diametrically enlarged heads of greater diameter than said bores formed on the inner ends of said tines, said tines being loosely received through said bores with said heads abutting the inner surface portions of said wall portions disposed about said bores.

4. The combination of claim 3 wherein said body includes a first end wall and said outer cylindrical wall is carried by said first end wall, said body including a second end wall axially spaced from said first end wall and from which said inner cylindrical wall is supported, said inner cylindrical wall projecting laterally from said second end wall toward said first end wall and being loosely telescopingly received within the confines of said outer cylindrical wall.

7. The combination of claim 1 wherein said tines comprise headed nails.