US1905819A - Boring and facing tool with feed attachment - Google Patents

Description

A ril 25, 1933. M. P. DOYLE 1,905,319

- BORING AND FACING TOOL WITH FEED ATTACHMENT Filed lay 1a, 1951 TTO N EYS,

Y 9 vgu Patented Apr. 25, 1933 UNITED STATES PATENT OFFICE MICHAEL P. DOYLE, or" Bnooxmm, raw xom;

9 v BORING AND FACING- TOOL WITH FEED ATTACHMENT Application filed Kay 13,

may be positively fed against the valveseat and positioned with respect thereto so that a required degree of cut may be accomplished 10 and when that degree of out has been completed the operation of the tool will cease to feed the cutter towards thevalve seat.

A further object of the invention isto pro-- vide a tool of this character whereby the said tool is made adaptable for use in refacing' valve seats in various types and sizes of valvecasings,or reboring cylinders on gasoline engines. I a

A further object of the invention is-to rovide a device of this character which wi be highly efficient, durable in operation and sturdy in construction. d

Other features and advantages of my invention will, hereinafter appear.

In the accompanying drawing:

Figure 1 is aview in elevation, mainly in section of my improved tool and showing it in operative position on a valve casing;

Fig. 2 is a transverse section of Figure 1 as seen along the planeindicated by the line 22 in Figure 1 and looking in the direction of the arrows;

Fig. 3 is a plan view of a portion of the mechanism of the tool. a

In describing the invention, reference will be made to the drawing by similar characters placed on corresponding parts throughout. the several views.

In illustrating my improved refacing tool, 40 I have shown the same applied to an ordinary type. of valve casing 1 having a valve seat 2 therein and from which seat extends an attaching neck 3. The valve casing is shown with an opening 4 which is normally adapted to be closed by a cover plate. The casing is also provided with the usual threaded openings 5 adapted to receive the securing bolts or studs for the valve cover.

While I have shown my tool as applied to a particular type of valve casing, it is to be 1931. Serial No. 536,965.

understood that the same may be applied to a number of different types of construction of valve casings and is not limited for use in connection with the one illustrated in the drawing.

The refacing tool is adapted to be secured to the valve casing by means of a support or brace 6 formed with the extensions 7 7 These extensions have elongated slots 8 and are adapted to be secured to the casing by I means of thezscrew threaded bolts 9 which are inserted into the threaded openings 5 of said casing." The support or brace 6 is provided with an interiorly threaded neck portion 10 which is adapted to'receive the-reduced threaded portion of a hollow tubular member 11.

This particular construction of the support or brace 6 makes the tool adaptable so that it may be fitted to any gasoline engine 7 by means of a reducing nipple and to be used for boring out the cylinders of the same or for facing the valve seats or worn valve chambers in pumps.

The bridge eflect produced by means of 7 the construction of the support or brace 6 also allows the operator of the tool ample room to reach into the valve casing to connect or remove the cutting element employed or any other of the parts of the tool which extend down into the casing without the necessity of removing the tool from its posi- "tion with respect to the valve casing. This particular construction of the support or brace also enables the operator to see the op- 95 eration of the cutter within the valve casing.

Extending through the tubular member 11 i is the shaft 12 which is formed at its upper end with the angular portion 45 and at its lower end with the tapered opening 16. The shaft 12 also is formed with the collar 13, said collar being positioned so that it will have a bearing contact with a fiber washer 15 positioned' against the inner face of the hollow tubular nut member 14.

The tubular hollow nut member 14 is interiorly threaded and is adapted to be received on the exteriorly threaded portion of the hollow tubular member 11.

The tapered opening 16 of the shaft 12 is a slot 21 which-is adapted to receive a tool or instrument therein above the. end of the .ing to the depth of the valve casing in contapered portion of the shaft 17 when said shaft is wedged -into place in the tapered opening 16 of shaft 12 so that said shaft 17 may be forced out of its wedged connection with shaft 12 when desired.

The shaft 17 is adapted to have removably connected therewith, in its threaded open end, the cutting tool 22 carrying the cutter 20. The said cutter 20' is positioned through a radially disposed slot in the shaft of the tool and is maintained in its proper cutting position by means of a suitable wedge 24.

The shafts on which the cutter 20 is positioned may be of any desired length. and different lengths of said shafts are used accordnection with which the tool is being used.

The cutting tool has the extension 26 to which is secured in any suitable manner the centering spider designated generally at 27.

The said spider is formed with the three hollow projecting arms 2 8,-29 and 30. Each of these arms are interiorly threaded so as to receive the screw threaded bolts 31. ,The bolts 31 are provided with the pointed heads 33 and may be adjusted with respect to the threaded arms 28, 29 and and held in adjusted position by means of the lock nuts 32. Each of the arms of the spider are provided with a pit point 34. Each of these points is positioned at an equidistant point from the end of said arms. Y

Secured to the head portion 15 of the nut member 14 many suitable manner as at 35 is the outwardly extending arm 36 having slidably mounted therein at its free end the square pin 37, with enlarged ends 37 The pin 37 may be held in any desired position 1with respect to the arm36 by means of a ey 38. F One face of square pin 37 is formed with a rounded portion 37", said rounded portion extending downwardly from the top of pin 37 to about half way of its length. Mounted on the shaft 12 above the nut 14 is a collar 39. This collar is secured to shaft 12 by means of a taper pin 38 which is adapted topass through said collar and shaft. Between the collar and the nut 14 is provided a iiber washer 39.

The collar 39 is provided with a hollow exteriorly threaded extension 40 which is adapted to receive therein the pin 41. The

pin 41 is provided with a shoulder 42 and is yieldingly maintained in the opening of threaded extension 40 by means of the internally threaded nut 43 which is adapted tobe screwed on the threaded portion of extension 40 of collar 39 and by the spring 44 which is positioned so as to abut against the shoulder 42 of the pin 41 and the end of the collar extension 40. The nut 44 is provided in con-' junction with the internally threaded nut 43 to regulate its position with respect to the collar extension 40.

In applying my tool to the use for which it is intended I first select the proper length of shaft 22, with its cutter member and extension 26 secured thereto, which will properly position said cutter with respect to the valve seat to be refaced. This shaft-22 is socured to the shaft17 and the tapered end of The centering'spider member is then positioned with respect to the interior of the neck 3'sothat the shaft 13.is accurately centered in the valve casing and the cutter-is positioned in proper. cutting relation with the valve seat. This is accomplished by manipulating the nuts 32 and the screw bolts 31 so that the ointed ends of the heads of said bolts will e equidistant from the pin pits 34 in the arms 6 the spider when they are in engagement with the side walls of the neck 3.

The proper eqpal distances may be measured by any suita le instrument using the pit points 34as one point and the side walls of the neck 3 as the other pgint in the positioning operation.

When the tool has been properly centered by means of. the positioning of said spider the bolts or screws 9 are then placed through the slots 8 of the extensions 7 of the brace 6 and the tool secured to the valve casing so as to prevent any improper vibration or movement'during the operation thereof.

The shaft 12 is then rotated by the handle which has been engaged with the end 45 thereof and such rotation is imparted to the Y 40 to rotate therewith and the end of the pin 41 will engage with the rounded portion 37"- of the square pin 37 secured in the end of the arm 36 and thus cause the nut 14 to rotate downwardly on the screw threaded tubular member 11. As the nut 15 moves downwardly the shaft 12also moves downwardly causing a greater pressure to be placed upon the cutter 20 against the face 0 the valve seat and thereby causing said cutter to make a cutting pass over the face of the valve seat.

When the cutter 20 has been fed against the valve seat face in making its cutting pass, by the downward pressure thus exerted to it to the extent that it resists such pressure, the further rotation of the shaft 12 will cause the rounded .end of pin 41 to be forced inwardly against the action of spring 44 by reason of its contact with the rounded portion of pin 37 and it will thus .slide past the rounded portion of pin 37. The downward rotation of the nut 14 thus will be arrested until the end of pin 41 is again brought into contact with the pin 37 by the further rotation of shaft 12.

When the downward rotation of the nut 14,is thus arrested the cutter having made its cut in the valve seat the same will not make another cutting pass until the nut 14 is again caused to move downwardly by reason of the rotation of arm 36 by means of the pin 41 engaging the pin 37.

If desired at any time the square pin may be released from its contacting position in arm 36 by unloosening the pressure thereon as applied by the key 38 and said pin may be allowed to drop below the ath of the pin 41 as the shaft 12 is rotate When this is done, of course, the nut member 14 will not progress downwardly on the threaded part of said member 11 as shaft 12 is rotated and the cutter 20 will merely pass over the surface of the valve seat without any pressure being i applied to it. t

It will be seen that by the construction of tool above described and illustrated in the drawing, the cutter can be accurately positioned with respect to the valve seat and any desired depth of cut for refacing the valve seat may be made with the cutter and when such out has been accomplished the cutting action of the cutter may automatically be stopped.

It is also obvious that valve seats of any number of types of valve casings maybe trued or reshaped and by reason of the facility of applying different lengths of extensions to the shaft 12 and that in this respect the tool is highly advantageous and useful.

. Various slight changes may be made in the general form of the parts described without departing from my invention, and, hence, I

do not limit myself to the exact details set forth but consider that any variations within the spirit and scope of my invention are equally comprehended bythe foregoing disclosure.

What I seek to secure by United States Letters Patent is: V

1. A tool of the class described comprising a support adapted to be adjustably secured to the valve casing and having an upward-.

opening therethrough, and mounted on said threaded'tubular extension and adapted to be rotatably moved with respect thereto, a shaft having rotary mountingin said support and extending through said threaded extension and the opening in the head portion of said tubular element, a collar in.- tegrally secured to said shaft and positioned within the hollow interiorly threaded element so as to contact with the interior face of the head portion thereof, an arm secured to and extending outwardly from the head portion of said tubular element and slidably carrying at its outer end ,"a square pin with a rounded portion formed-thereon, means secured to said shaft adapted to engage said pin when said shaft is rotated and to cause the said pin and its associated arm and the tubular element to be rotated with said shaft so as to cause said tubular element to-be moved downwardly along the threaded portion of the exteriorly threaded tubular extension of said support and thus cause said shaft to move downwardly into the valve cured to the lower end of said shaft, a cutting tool removably secured to the lower end of said extension shaft and provided with a cutting element positioned so as to contact with the valve seat of said valve casing when said first mentioned shaft ,is moved downwardly by the downward progression of said tubular element on the threaded extension of said support, and means secured to the lower end of said cutting element to center said tool with respect to the valve casing and its valve seat. v

2. A tool of the class described comprising a supporting means for supporting and securing said tool in operative position with respect tothe opening in a valve casing, an exteriorly threaded tubular member secured to said supporting means, a shaft having rotary mounting in said supporting means and in said exteriorly threaded tubular member and adapted to extend downwardly into the interior of the valve casing, an extension shaft removably secured'to the lower end of said shaft, a cutting tool removably secured to the lower end of said extension shaft and comprising a shaft having a cutter element and a positioning element mounted thereon,

said cutter element being positioned on said of the casing below the valve seat, a tubularinteriorly. threaded nut rotatively mounted on said exteriorly threaded tubular member secured to said sup ort, said tubular threaded nut being provi ed with an outwardl extending arm, an abutment pin sli ably mounted in the end of said arm, a collar 5 formed on said shaft and positioned so as to ,have contact with the interior face of the head portion of said tubular nut, a collar fixedly secured to said shaft above said tubular nut and positioned so as to have bearing contact with the upper and outer face of the headof said nut, said collar being provided with a tubudar exteriorly threaded extension 11 pin mounted in said tubular extension of said collar and positioned sothat it.w-ill en- 15 gage with said abutment pin, and means ad-v ustabl secured to said extension-for hold ing sai pin in yielding contact with a spring in said tubular extension, means on said shaft for rotating the same and its connected partsincluding the cutter in said support and to cause said pin to abut a inst said abutment pin and cause the rotation of'said nut downwardly on the threads of said tubular extension and thus cause the cutter tobe positively fed with a bearing contact against the valve seat until said resilient pin is forced past the said abutment pin. 1 In testimony whereof I have hereunto set my hand on this'.12th day of May, A. 1)., '1931. i

' MICHAEL P. DQYLE.

Images