US2887685A

US2887685A - Apparatus for impelling a peg or the like into a body

Info

Publication number: US2887685A
Application number: US524438A
Authority: US
Inventors: Cast Adolf
Original assignee: Karl M Reich Maschinenfabrik GmbH
Current assignee: Karl M Reich Maschinenfabrik GmbH
Priority date: 1954-07-27
Filing date: 1955-07-26
Publication date: 1959-05-26
Anticipated expiration: 1976-05-26
Also published as: DE1094674B; GB787685A

Description

y 26, 1959 A. CAST 2,887,685

APPARATUS FOR IMPELLING A PEG OR THE LIKE INTO A BODY Filed July. 26, 1955 5 Sheets-Sheet 1 g M. WV

I L ZI enbr',

HdoIf (45% by wamas 5M1 A. CAST May 26, 1959 APPARATUS FOR IMPELLING A PEG OR THE LIKE INTO A BODY Filed July, 26, 1955 3 Sheets-Sheet 2 F enlol: fido/ Cast y 26, 1 5 A. CAST 2,887,685

APPARATUS FOR IMPELLING A PEG'QR THE LIKE INTO A BODY Filed July 28, 1955 3 Sheets-Sheet 8 Hdolf Ca5+ mad '6 $1 518 .ferred embodiment of the present invention;

APPARATUS FOR ,IMPE'LLING A PEG oR THE LIKE INTO A BODY Adolf Cast, Oberlenningen, Baden-Wurttemberg, Germany, assignor to Firma Karl M. Reich, Nurtingen, Baden-Wurttemberg, Germany Application July 26, 1955, Serial No. 524,438

Claims priority, application Germany July 27, 1954 8 Claims. c1. 1-1

p The present invention relates to apparatus for impelling a peg or a nail or the like into a body.

More particularly, the present invention relates to an impeller arrangement for driving a peg or nail or the like into walls or ceilings by means of the pressure of a suitable pressure fluid medium as, for example, air.

It is among the objects of the present invention to provide an improved and simple impeller arrangement by means of which pegs or the like may readily be driven into bodies or masses, and particularly, by means of which pegs or the like may be driven into bodies located at difficult to reach places; and further particularized, by means of which pegs or the like may be driven a prede-. termined distance into a body or mass. a

' ,The objects of the present invention also include the provision of an impeller arrangement which is equipped with suitable means for supplying and propelling pegs or the like to be driven into a body, which means may be manually controlled by an operator located at a distance from these means. 1 v 7 Moreover, the objects of the present invention include the provision of a practical peg supply'arrangement for supplying pegs or the like to an impeller arrangement which is adapted to drive pegs or the like into a body or mass.

With the above objects in view, the'present invention 2,887,685 Patented May 26, 1959,

2 Fig. 3 is a sectional view taken substantially along line II IIII of Fig. 1 and illustrates a preferred arrangement of a peg or the like impelled by the apparatus of the present invention; Fig. 4 is a sectional elevational view of a preferred embodiment of a peg supply means and pressure fluid medium supply means according to the present invention;

Fig. 5 is a side elevational view of the embodiment illustrated in Fig. 4;

Fig 6 is a sectional view taken along line VIVI of I Fig. 5;

provides an impeller arrangement adapted to' propel a peg or the like to be driven into a body along aconduit or suitable guide tube of predetermined length by subjecting the peg to the action of a fluid medium under predetermined pressure so that the peg? will attain a predetermined terminal velocity and thus a predetermined kinetic energy and be driven a predetermined .distance into the body. More particularly, the present invention mainly consists of an impeller arrangement for driving a peg or the like into'a body, which impeller arrangement comprises peg supply means in communication with the conduit means in the region of its back endfor supplying a peg; pressure fluid medium supply means also in communication with the tubular conduit means; and manually operable control means on the conduit means in the e the forward end 5 of the tube.

region of its forward end and connected to the peg supistic for the invention are set forth in particular in the i appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof,

will be best understood from the followingdescription of specific embodiments when read in connection with k the accompanying drawings, in which:

Fig. 1 is a schematic view, partly in section, of a pre- Fig. 2v is a schematic view of another preferred em} v bodiment of the present invention;

Fig. 7 is a plan view of the embodiment illustrated in Figs. 4-6, the parts being shown in one operative position;

Fig. 8 is a plan View 'of the embodiment illustrated in Figs. 4-6, the parts being shown in another operative position;

Fig. 9 is a schematic side elevational view of the embodiment illustrated in Figs. 4-8, including a preferred embodiment of a peg guide arrangement associated therewith;

.Fig. 10 is a sectional elevational view of another preferred embodiment of a peg supply means and pressure fluid medium supply means according to the present invention;

' Fig. 11 is a sectional view taken along line XI-Xl of Fig. 1-0; and

Fig. 12 is a fragmentary plan view of the embodiment illustrated in Figs. 10 and 11.

Referring now to the drawings, and to Fig. 1 thereof in particular, there is shown a preferred embodiment of animpeller arrangement according to the present invention which incorporates an elongated tubular conduit means or tube 1 which may be flexible throughout at least a portion of its length.

The back end of the tube 1 is in communication'with a peg supply means 2 which is adapted to supply pegs or the like 3 into the back end of the tube in such a manner that a peg 3 within the tube 1 divides the same into a back chamber 1 and a front chamber 1 The inside diameter of the tube 1 corresponds approximately to the outside diameter of the pegs 3 which are to be impelled,

A pressure fluid medium supply means 4 is also in communication with the back end of the tube 1 so that this back chamber may be placed in communication with a space or chamber containing a fluid medium under pressure. In this way, the back chamber may be filled with a fluid medium under pressure. The tube 1 is of such length that a peg impelled therethrough will attain a known velocity when it reaches The peg will, when it reaches this front end 5, possess sufiicient kinetic energy to enable the peg to penetrate a predetermined distance into a body or mass 6 which is adjacent the front end 5 of the tube 1.

It has been found that a pointed peg 65 mm. long, having a weight of 5 grams and driven by a fluid medium. under 6 kg./cm. through a tube which is 4 m. long and which has an inside diameter corresponding to the outside diameter of the head portion of the peg, willbe forced into a body or mass of wood a depth of approximately 65 mm. Shorter pegs may obviously be driven into a similar body by being subjected to a fluid medium 'under less pressure, or by being impelled through a shorter tube. Conversely, longer pegs should be subjeoted to higher pressures or be impelled through a longer tube.

The impeller arrangement incorporates manually op- .erable control means 7 which are mounted on the tube 1 in the region of its front end 5. The control means includes a hand operated grip 7' which might be connected by any kind of motion transmitting means, for

instance the electrical connection shown in the drawings, to the peg supply means 2 as well as to the pressure fluid medium supply means 4. The details of two preferred embodiments of the peg supply means and the pressure fluid medium supply means, as well as the manner in which these means are connected to each other and to the control 7, are shown.

According to the embodiment illustrated in Fig. 1, the control 7 incorporates a switch 7" which is actuated by the grip 7 and is electrically connected by means of a wire 8 to an electromagnet 9. A battery 44 or other suitable source of electrical energy is incorporated in the wire 8. The electrical circuit between the switch 7" and the electromagnet 9 may be completed in any suitable manner, such as by grounding the switch 7 and the electromagnet 9 to the tube 1, in the event the latter is made of a current conducting material. Alternatively, a flexible tube 1 made of rubber or the like, may be provided with a metallic reinforcing sleeve which may serve as a ground return.

The peg supply means 2 incorporates a peg delivery means 12, and the pressure fluid medium supply means 4 incorporates a valve means 23. The interconnection of these elements will be more detailedly shown below.

By virtue of the above arrangement, the forward end 5 of the tube 1 may be placed adjacent a body which is spaced from the back 'end of the tube 1 and from the peg delivery means 2 and the fluid pressure medium supply means which are in communication with this back end of the tube 1. Consequently, pegs or the like may readily be driven into normally inaccessible or hard to reach bodies or masses, such as walls and ceilings or the like. Moreover, by virtue of the fact that the manually operable control means 7 is mounted on the tube 1 in the region of its front end 5, an operator holding this front end adjacent a body which is physically spaced from the back end of the tube may manually operate the peg supply means 2 and the pressure fluid medium supply means 4.

In the embodiment illustrated in Fig. 2, the tube 1a is formed with a coiled portion 1a. In this way, the tube 1a may be of the necessary length while the back end of the tube, as well as the peg supply means 2a and the pressure fluid medium supply means 4a may be relatively near the front end 5a of the tube In and the body 6:: into which the pegs are to be driven.

By virtue of the fact that the back end of the tube 1a is relatively near the front end 5a, the introduction of pegs into the tube 1a may be accomplished manually, so that the pegsupply means 2a may include but a minimum of structural elements.

As in the above-described embodiment the arrangement may be provided with a suitable manually operable control means 711, 7a, 7a" for activating the pressure fluid medium supply means 4a.

Fig. 3 illustrates a peg 3 or the like which is formed with a head portion 3' having an outside diameter corresponding approximately to the inside diameter of the tube 1. The peg 3 is additionally provided with a pistonlike substantially cylindrical packing member 16 which improves the tightness and sealing normally aflorded by the head portion 3'. The packing member 16 may be made of cardboard or other equally inexpensive material, thereby obviating the necessity of salvaging or recovering the packing member after the peg with which it is associated has been driven into a body.

Figs. 4-9 detailedly show a preferred embodiment of a peg supply means and pressure fluid medium supply means adapted to be incorporated in an impeller'arrangement according to the present invention. Both of these means are intimately associated with each other and together constitute a combined peg supply and pressure fluid medium supply means which incorporates a support -or housing 11. :A peg delivery means or member 12 is mounted in a vertical bore formed in the housing 11 and is pivotable about a substantially vertical axis.

The housing 11 is also formed with a downwardly inclined passage 14 as well as with a conduit 15 which is in communication with the passage 14. The member 12 is formed with a downwardly inclined opening means 14' which, in one position of the member 12, is in registration with and constitutes a part of the passage 14.

The other end of the passage 14 is in communication with a chamber 17 formed by a housing portion 39 connected to the housing 11, and the lower end of the passage 14 is in communication with the back end of the tube 1. The transition between the passage 14 and the tube 1 may be accomplished by a transition piece 19 which is externally threaded and in threaded engagement with the housing 11. The transition piece 19 is connected to a sleeve 20 which, in turn, is connected to the back end of the tube 1. The transition piece 19 and the sleeve 20 are connected to each other by a suitable retaining nut 21 which is in threaded engagement with the transition piece 19 and which engages a flange portion 20' of the sleeve 20. An annular gasket 22 may be interposed between the annular end face of the transition piece 19 and the flange 20' of the sleeve 20. By virtue of this arrangement, a fluid-tight connection between the tube 1 and the passage 14 as well as the conduit 15 is attained.

'The transition piece 19 is formed with a tapered bore 18 which funnels and temporarily retains individual pegs 3 delivered through the passage 14 into the back end of the tube 1.

The conduit 15 is adapted to receive a valve 23 which, as may be seen in Fig. 6, comprises a cylindrical valve casing 24 which is threaded into an enlarged end portion of the conduit 15. The valve casing 24 is formed with an inner flange 26 which bounds a valve chamber 25. A valve member 28 is arranged within the valve chamber 24 and is adapted to close the conduit 15. A compression spring 27 is interposed between the valve member 28 and the flange 26 and biases the valve into its closed position.

The valve member 28 is formed with an operating portion or stem 29 which projects into a recess 30 formed in the housing 11.

The peg delivery member 12 is formed with an abutment 31, as may best be seen in Figs. 5 and 6, which abutment also projects into the recess 30. The arrangement of the parts is such that when the member 12 is rotated about its axis the abutment 31 will engage the operating stem 29 and move the valve 28 into its open position against the action of the spring 27 so that a source of fluid pressure is placed in communication with the conduit 15 and may fill the back end of the tube 1 with a fluid medium under pressure. The source of fluid pressure may be connected to the valve casing 24 by means of a conduit 32 which is connected to the valve casing 24 by means of a suitable retaining nut 33 which may be similar to the retaining nut 21.

In .the embodiment illustrated in Fig. 1, the common housing containing the peg supply means 2 and the pressure fluid medium supply means 4 is formed so that a chamber 17 which corresponds to the chamber 17 of the embodiment illustrated in Figs. 4-9, is contained within thehousing itself, thus obviating the need of providing a separate housing portion, such as the housing portion 39. Also, the arrangement of the parts in the embodiment illustrated in Fig. 1 is such that the valve means 23 is arranged'entirely within the housing.

The member 12 is provided with a suitable moving means'for pivoting it about its axis. These moving means include an ear portion 34 which is firmly connected to or is integral with a member 12. The free end of the ear portion 34 is connected, by means of a connecting link 35, to the free end of an armature 36 of an electromagnet 37. The armature is constantly biased out of rail j.

the electromagnet 37 by means of a compression spring 38. p

The member 12 is provided, at its upper end, with a sector-shaped portion 42 which is pivotable about the vertical axis about which the member 12 is pivotable. The portion 42 is formed with a notched receiving portion 43 which is so shaped as to be adapted temporarily to receive a single peg or the like which is to be driven through the tube 1.

A suitable peg providing means 13 is provided for guiding a series of pegs toward the periphery of the sectorshaped portion 42. The peg providing means includes a downwardly inclined slotted guide rail having its lower end in'juxtaposition with the periphery of the sectorshaped portion 42 so that a series of pegs or the like slidingly arranged within the slot 13 of the guide rail are gravity fed toward the sector-shaped portion 42. The slot 13' is of such width that the stems of the pegs may pass therethrough but so that the passage of the head portions 3 of the pegs is prevented. The pegs will therefore assume the position illustrated in Figs. 4, 5 and 9. If desired, the guide rail may be associated with a rocking supply box 40, illustrated in Fig. 9, the bottom of which box is formed with a slot (not shown) which constitutes a continuation of the slot 13'. The supply box 14 may be mounted for pivotal movement about a horizontal axis indicated at 41 and be pivoted about such axis by means of a suitable eccentric drive 40. In this way, pegs or the like which are dropped into the supply box at random will eventually assume the positions of the pegs shown in Fig. 9.

The arrangement of the above-described parts is such that when the electromagnet 37 is not activated, the spring 38 urges the member 12 into a delivering position which is illustrated in Fig. 7. In this position, the opening means 14' is in registration with and constitutes a part of the passage 14. Also, in this position the notched portion 43 of the sector-shaped portion 42 is above the chamber 17 in registration with a slot 39' of the housing portion 39 and above the passage 14. Moreover, the abutment 31 is spaced from the operating stem 29 so that the valve member 28 is in its closed position. A peg 3 supplied during a previous cycle of operation, is located within the bore 18 of the transition piece 19, as shown in Fig. 4.

When the electromagnet 37 is actuated, such as by activation of the manually operable control means 7 illustrated in Figs. 1 and 2, the armature 36 is attracted and the member 12 will assume a receiving position illustrated in Fig. 8. In this position the opening means 14 is out of registration with the passage 14 and closes the same. The arrangement of the parts is such that after the passage 14 is closed the abutment 31 engages the operating stem 29 of the valve member 28 and moves the same to its open position. As a result, a source of fluid medium under pressure is placed in communication with the conduit 15 and fills the closed passage 14 as well as the back chamber of the tube 1 with a fluid medium under pressure and thereby impels the peg 3 through the tube. As described above, the velocity and consequently the kinetic energy of the peg as it leaves the front end 5 of the tube 1 will be a function'of the length of the tube 1 as well as of-the magnitude of the pressure supplied by the source of fluid pressure.

Also, when the member 12 is in its receiving position, the notched portion 43 is in registration with the slot 13' of the peg delivery means 13 so that a single peg 3 may slide into the notched portion and be temporarily retained therein.

Upon deenergization of the electromagnet'37, the spring 38 moves the armature 36 upwardly, as viewed in Figs. 7 and 8, and the member 12 assumes its delivering position illustrated in Fig. 7. Before the opening means 14 is in registration with the passage 14, the abutment 31 will have, moved out of. engagement with the operating stem l 6 29 of the valve member 28 so that the latter will be moved to its closed position under the influence of the spring 27.

When the member 12 reaches its delivering position, the notched portion 43 is in registration with the slot 39' of the housing portion 39 and is above the passage 14. The peg 3, which is temporarily received in the notched portion 43, is thereupon permitted to drop through the charm ber 17 and the passage 14, which passage includes the opening means 14' of the member 12 until the peg 3 assumes a rest position which is shown approximately in Fig. 4 at 3 Accidental adhering or sticking of the peg 3 within the notched portion 43 is prevented partly by the centrifugal force exerted on the peg during rotation of the member 12 about its axis and partly by the impact of the member 12 when its pivotal movement is abrupfly halted upon its attaining its delivering position. a

The apparatus is now ready for another cycle of operation.

According to a preferred arrangement, the peg supply means 2 and the pressure fluid medium supply means 4, including a compressor or other source of fluid medium under pressure, may, as is shown in Fig. 1, constitute a single unit, and the tube 1 may, throughout at least a por-' tion of its length, be flexible so that the operator need only place the forward end '5 adjacent a body into which pegs are to be driven, without it being necessary to move the remainder of the structure. 1

Figs. 10-12 detailedly show another preferred embodiment of a peg supply means and pressure fluid medium supply means adapted to be incorporated in an impeller arrangement according to the present invention. As'in the above described embodiment, both of these means are intimately associated with each'other and together constitute a combined peg supply and pressure fluid medium supply means which includes a support or housing 61 defining a chamber 60. A peg delivery member 62 having a notched receiving portion 63 is mounted for reciprocating movement relative to the housing 61 between a receiving position wherein the notched portion 63 is in registration with the slot 13' of a peg providing means 13, which may be similar to the peg delivery means described above, and a delivering position wherein the notched portion 63 extends through a recess 64 of the housing 61 and is within the chamber 60 so that a peg 3 temporarily retained within the notched portion 63 may drop into the chamber 60.

The member 62 is provided with an operating piston 45 which is slidably arranged within a cylinder 47. The pis-' ton is formed with a piston portion 45" which forms a chamber 46 between its end face and one end wall of the cylinder 47. t I

A conduit 48 places the chamber 46 in communication with a valve control which may be mounted on the tube 1 in the region of its front end. The valve control 80 includes a piston valve member 81 which is slidably arranged in a valve cylinder 82. The piston valve member 81 is biased into the position illustrated in Fig. 10 by a spring 83, so that the conduit 48 and consequently the chamber 46 is vented to atmosphere by way of a bore 84 formed in the valve cylinder 82. When the piston valve member 81 is moved downwardly, as viewed in Fig. 10, into the position shown in dotted lines, the conduit 48 and consequently the chamber 46 is placed in communication with a conduit 85 and consequently with a source of fluid pressure 86.

The piston 45 is biased into the position shown in Fig. 10 by means of a compression spring 65 which urges a piston portion 45 into engagement with a stop 49 which projects into the interior of the cylinder 47 In this position, the piston portion 45' covers the inner opening of a conduit 32 which is connected to a source of fluid pressure 32'. The latter may be separate from the source of pressure 86 described above, or may be the same source. Also, a conduit 50 and a vent 50 are in communication with a chamber 46', so that when the pist n. .5 the position illustrated in Fig. 10 the conduit 50 is vented to atmosphere.

The combined peg supply and pressure fluid medium supply means also includes a piston-like passage closure member 52 which has an end face '52. and is slidably arranged within a cylinder 51. The cylinder 51 is formed with preferably aligned

passage portions

56 and 57, the former being in communication with the chamber 60 and the latter being in communication with the back end of the tube 1. The closure member 52 is formed with an opening 55 and is biased against a stop 54 into the position shown in Fig. 10 by a spring compression 53, in which position the opening 55 is in registration with the

passage portions

56 and 57.

The conduit 50 is in communication with a chamber 52" which is formed between the end face 52 and one end wall of the cylinder 51.

The cylinder 51 is formed with a bore 58 which is covered by the member 52 while the same is in the position shown in Fig. 10, and a conduit 59 places this bore 58 in communication with the back end of the tube 1.

When the piston valve member 81 is moved downwardly, the chamber 46 is filled with a fluid medium under pressure, as described above. As a result, the piston 45 is moved leftwardly, as viewed in Fig. 10, so that a peg 3 received in the notched receiving portion 63 is moved into the chamber 60 and permitted to drop as soon as the notched receiving portion 63 has entered the chamber 60 and is spaced from the lower edges of the guide rails of the peg providing means 13. In this way, the peg delivery member 62 is moved from its receiving position, shown in Fig. 10, to its delivering position.

The leftward movement of the piston 45 is limited by the stop 49 which is engaged by the piston portion 45" when the member 62 has attained its delivering position. In this position, the vent 50 is covered by the piston portion 45" whereas the inner ends of the

conduits

32 and 50 are covered by neither piston portion and are in communication with the chamber 46' and consequently with each other. As a result, the source of fluid pressure 32 is placed in communication by way of the conduit 32, the chamber 46' and the conduit 50, with the chamber 52" so as to bring about leftward movement of the closure member 52. This leftward movement brings the opening 55 out of registration with the

passage portions

56 and 57 so that the passage which includes the chamber 60, the passage portion 56, the opening 55 of the member 52, and the passage portion 57, is closed. This leftward movement of the member 52 occurs sufliciently rapidly so as to prevent the passage of that peg 3 which has just been moved into the chamber 60 by the peg delivery member 62.

The leftward movement of the member 52 also uncovers the interior of the bore 58 thereby placing the conduit 59 and consequently the back end of the tube 1 and the passage portion 57 in communication with the source of fluid pressure 32'. A peg 3 supplied during a previous cycle of operation, is located within the back end of the tube 1 and will be propelled through the tube 1 by the pressure fluid medium supplied by the source of fluid pressure 32.

When the piston valve member 81 is released the spring 83 will move the same to the position illustrated in Fig. 10. The chamber 46 will thus be vented to atmosphere by way of the conduit 48, the interior of the valve cylinder 82 and the bore 84. The spring 65 will thereupon move the piston 45 rightwardly into the position illustrated in Fig. 10, thereby covering the conduit 32 and uncovering the vent 50'. The chamber 52" will thus be vented to atmosphere by way of the conduit 50, the chamber 46 and the vent 50, thereby permitting the spring 53 to move the member 52 rightwardly into the position illustrated in Fig. 10. The opening 55 will thereupon enter into registration with the

passage portions

56 and 57 and the peg 3 which was permitted to drop into the chamber 60 after the peg delivery member 62 at tained its delivering position, will be permitted to pass through the opening 55 and the passage portion 57.

The apparatus is now ready for another cycle of operation.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of methods and' apparatus for impelling a peg or the like into a body differing from the types described above.

While the invention has been illustrated and described as embodied in a fluid pressure impeller, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. An impeller arrangement for driving a peg into a. body, comprising, in combination, elongated tubular conduit means having an inside diameter corresponding approximately to the largest outside diameter of a peg to be driven into a body, said conduit means having a back end, a flexible intermediate portion, and a forward end freely movable relative to said back end and adapted to be placed adjacent a body which is spaced from said back end of said conduit means and into which the peg is to be driven; peg supply means in communication with said conduit means in the region of said back end thereof for supplying'a peg thereinto so that the peg is slidably arranged in said conduit means and divides the same into a forward chamber and a back chamber; pressure fluid supply means also in communication with said tubular conduit means in said region of said back end thereof for filling, when a peg has been supplied to said con duit means by said peg supply means, said back chamber with a fluid under pressure, thereby impelling the peg through said conduit means and out of said forward end thereof into a body thereadjacent; and manually operable control means associated with said conduit means in the region of said forward end thereof and connected to said peg supply means and to said pressure fluid supply means for controlling the manner in which said peg supply means and said pressure fluid medium supply means supply pegs and fluid under pressure, respectively, to said back end of said conduit means, thereby enabling an operator holding said front end of said conduit means adjacent a body spaced from said back end of said conduit means and said peg supply means and pressure fluid supply means in communication therewith manually to operate said peg supply means and said pressure fluid supply means.

2. An impeller arrangement defined in claim 1 wherein said peg supply means and said pressure fluid supply means are interconnected with each other and consitute a combined peg supply and pressure fluid supply means, and wherein said manually operable control means is connected to said combined peg supply and pressure fluid medium supply means.

3. An impeller arrangement for driving a peg into a body, comprising, in combination, elongated tubular conduit means having an inside diameter corresponding approximately to the outside diameter of a peg to be driven into a body, said conduit means having a back end and a forward end adapted to be placed adjacent a body into which the peg is to be driven; peg supply means in com-- mimication with said; conduit means in the region ofs'aid back end thereofforsupplying apeg thereinto'so that the peg is slidably arranged in said conduit means and ing a receiving portion adapted to receive a peg andmounted on said support above said passage for pivotal movement relative thereto between a receiving position wherein said receiving portion is laterally spaced from said passage and a delivering position wherein said receiving portion is above said passage, whereby a peg fur-- nished to said peg delivery means may be received bysa'id receiving portion thereof when said peg delivery means is in its receiving position and may be placed,

above and permitted to drop into said passage when said peg delivery means is in its delivering position, so that the peg may be introduced into said back end of said conduit means, said peg delivery means being formed with opening means therethrou'gh, in said delivering position said opening means being in registration with and forming a portion of said passage of said support and in said receiving position said opening means being out of registration ,"Wlth said passage 1 so that said passage is closed; pressure fluid supply means also in communication with said tubular conduit means in said region of said back end thereof for filling said back chamber with a fluid under pressure; and operating means connected to said peg delivery means of said peg supply means and to said pressure fluid supply means for moving said peg delivery means from its receiving position to its delivering position, thereby introducing a peg into said back end of said conduit means, for thereafter moving said peg delivery means from its delivering position to its receiving position, thereby closing said passage, and for thereafter actuating said pressure fluid supply means in such a manner as to fill said back chamber and said passage with the fluid under pressure, thereby impelling the peg through said conduit means and out of said forward end thereof into a body thereadjacent 4. An impeller arrangement for driving a peg into a body, comprising, in combination, elongated tubular conduit means having an inside diameter corresponding approximately to the outside diameter of a peg to be driven into a body, said conduit means having a back end and a forward end adapted to be placed adjacent a body into which the peg is to be driven; peg supply means in communication with said conduit means in the region'of said back end thereof for supplying a peg thereinto so that the peg or the like is slidably arranged in said conduit means and divides the same into a forward chamber and a back chamber; and pressure fluid supply means also in communication with said tubular conduit means in said region of said back end thereof for filling, when a peg has been supplied to said conduit means by said peg supply means, said back chamber with a fluid under pressure, thereby irnpelling the peg through said conduit means and out of said forward end thereof into abody thereadjacent, said pressure fluid supply means including a housing formed with a conduit in communication with said back end of said conduit means, and valve means in said conduit movable between open and closed positions for connecting and disconnecting, respectively, said back end of said conduit means with a source of fluid medium under pressure.

5. An impeller arrangement for driving a peg into a body, comprising, in combination, an elongated tubular conduit means having an inside diameter corresponding approximately to the outside diameter of a peg to be driven into a body, said conduit means having a back end and a forward end adapted to be placed adjacent a body into which the peg is to be driven; and combined peg supply and pressure fluid supply means in communication with said conduit means in the region of said back end thereafter-supplying a peg thereinto so thatthe peg is slidably arranged in said conduit means and divides the same'into a forward chamber-and a back chamber, and for filling, after a peg has been supplied to saidconduit means, said back chamber with a fluid under pressure, said combined peg supply and pressure fluid, medium supply means including a support defining both a passage and'a conduit in communication with said back end of said conduit means, first valve means having a receiving portion adapted to receive a peg and mounted on said support for movement relative thereto between a receiving position wherein said receiving portion is laterally spaced from said passage and wherein said conduit is closed and a delivering position wherein said receiving portion is above said passage and wherein said conduit is open, operating means for moving saidvfirst valve means from its receiving position to its delivering position, second valve means on said support and mount-.

ed for movement relative thereto between a first position wherein said passage is open and wherein said conduit is closed and a second position wherein said passage is closed, and means connecting said second valve means to said first valve means for moving said second valve means from its first position to its second position when said first valve means has been moved into its delivering position, whereby when said first valve means is moved from its receiving position to its delivering position, said second valve means is moved to its second position, thereby closing said passage and placing a source of fluid under pressure connected to said conduit in communication with said back end of said conduit means and the thus-closed passage, thereby impelling a peg in said back end of said conduit means through the same and out of said forward end thereof into a body thereadjacent, and whereby another peg furnished to said peg delivery means while the latter was in its receiving position is moved above said passage and is permitted to drop thereinto so that said other peg may be introduced into said back end of said conduit means after said second valve means has been moved into its first position.

6. An impeller arrangement for driving a peg into a body, comprising, in combination, an elongated tubular conduit means having an inside diameter corresponding approximately to the outside diameter of a peg to be driven into a body, said conduit means having a back end and a forward end adapted to be placed adjacent a body into which the peg is to be driven; and combined ,peg supply and pressure fluid supply means in communication with said conduit means in the region of said back end thereof for supplying a peg thereinto so that the peg is slidably arranged in said conduit means and divides the same into a forward chamber and a back chamber, and for filling, after a peg has been supplied to said conduit means, said back chamber with a fluid under pressure, said combined peg supply and pressure fluid supply means including a support defining both a passage and a conduit in communication with said back end of said conduit means, first valve means having a receiving portion adapted to receive a peg or the like and mounted on said support for movement relative thereto between a receiving position wherein said receiving portion is laterally spaced from said passage and 'wherein said conduit is closed and a delivering position wherein said receiving portion is above said passage and wherein said conduit is open, first biasing means for biasing the first valve means into its receiving position, operating means for moving said first valve means from its receiving position to its delivering position against the action of said first biasing means, second valve means on said support and mounted for movement relative thereto between a first position wherein said passage is open and wherein said conduit is closed and a second position wherein said passage is closed, second biasing means for biasing said second valve means into its first position, and means connecting said second valve means to said first 11- valve means for moving said second valve means from its first position to its second position against the action of said second biasing means when said first valve means has been moved into its delivering position, whereby when said first valve means is moved from its receiving position to its delivering position, said second valve means is moved to its second position against theaction of said second biasing means, thereby closing said passage and. placing a source of fluid under pressure connected to said conduit in communication with said back end of said conduit means and the thus-closed passage, thereby impelling a peg in said back end of said conduit means through the same and out of said forward end thereof into a body thereadjacent, and whereby another peg fur.- nished to said peg delivery means while the latter was in its receiving position is moved above said passage and is permitted to drop thereinto so that said other peg may be introduced into said back end of said conduit means after said second valve means has been moved into its first position under the action of said second biasing means.

7. An impeller arrangement as defined in claim 6 wherein said operating means is manually operable and is mounted on said conduit means in the region of said front end thereof, thereby enabling an operator holding said front end of said conduit means adjacent a body spaced from said back end of said conduit means manually to activate said combined peg supply and pressure fluid medium supply means.

8. An impeller arrangement for driving a peg into a body, comprising, in combination, an elongated tubular conduit means having an inside diameter corresponding approximately to the outside diameter of a peg to be driven into a body, said conduit means having a back end, a flexible intermediate portion, and a forward end freely movable relative to said back end and adapted to duit means in the region of said back end thereof for supplying a peg thereinto so that the peg is slidably arranged in said conduit means and divides the same into a forward chamber and a back chamber, and for filling, after a peg has been supplied to said conduit means, said back chamber with a fluid under pressure, thereby impelling the peg through said conduit means and out of said forward end thereof into a body thereadjacent; and manually operable control means on said conduit means in the region of said forward end thereof and connected to said combined peg supply and pressure fluid medium supply means for controlling the manner in which the same supplies pegs and fluid under pressure to said back end of said conduit means, thereby enabling an operator holding said front end of said conduit means adjacent a body spaced from said back end of said conduit means and said combined peg supply and pressure fluid supply means in communication therewith manually to operate the same.

References Cited in the file of this patent UNITED STATES PATENTS 126,159 Sheflield Apr. 30, 1872 1,980,967 De Mooy Nov. 13, 1934 2,395,354 Temple Feb. 19, 1946 2,498,503 Papalia Feb. 21, 1950 2,518,395 Sopris Aug. 8, 1950 2,732,554 Knott Jan. 31, 1956 FOREIGN PATENTS 413,207 Great Britain July 12, 1934