US1361682A - Valve stem guide and seat reamer - Google Patents

Description

R. M: CHADSEY.

VALVE STEM GUIDE AND SEAT REAMER. APPLICATION FILED IULY25. m9.

1,361,682., Patented Dec. 7, 1920.

2 SHEETS-SHEET I.

7 7 Elwvawtoz Gamma R. M. CHADSEY.

VALVE STEM GUIDE AND SEAT REAMERH APPLICATION FILED JULYZS. 1919.

Patented Dec. 7,1920.

2 SHEETS-SHEET 2.

ROBERT M. CHADSEY, OF ORCUTT, CALIFORNIA.

VALVE STEM GUIDE AND SEAT REAMER.

Specification of Letters Patent.

Patented Dec. *7, 1920.

Application filed July 25, 1919. Serial No. 313,190.

To all whom it may concern.

Be it known that I, ROBERT M. OHADSEY, a citizen of the United States, residing at Orcutt, in the county of Santa Barbara and State of California, have invented new and useful Improvements in Valve Stem Guides and Seat Reamers, of which the following is a specification.

The object of the invention is to provide a device adapted for grinding the valve seats of internal combustion engines. To this end the device comprises a suitable guide for clamping on top of the engine casing. This guide carries a reamer for truing the valve seat and there is carried by the said reamer a second reamer for truing the valve stem guide. The guide forming a part of the invention being attachable to the engine casing insures the true reaming of both the valve seat and the valve stem guide. Attendant on the improved device there is an improved feeding means operative in connection with both reamers and the two are designed for turning by an appropriate handle which is detachably secured to one.

As a further object the invention seeks the provision of a device of this character which is simple in construction, durable and effective in operation and inexpensive to manufacture.

Other and further objects appear in the following description wherein the invention is set forth in detail.

As shown and described, a specific em bodiment of the invention is adhered to but to this embodiment the invention is not to be restricted. Actual practical application may suggest certain desirable changes or alterations and the right is claimed to make any which do not deviate in scope from the subjoined claims.

The same numerals of reference designate the same parts throughout the several figures of the drawings, wherein:

Figure 1 is a central vertical sectional view through the improved device.

Fig. 2 is a top plan view of the structure in Fig. 1.

Fig. 3 is a side elevational View of the valve seat reamer, the stem of the guide reamer being carried within the seat reamer.

Fig. 4 is a side elevational view of the valve stem guide reamer.

Fig. 5 is a side elevational view of the externally threaded collar employed for feeding the reamers to their work.

As shown, the invention comprises a reamer guide element formed with a tubular body 1 and a base-flange 2. This tubular guide element is adapted for attachment" on top of the engine casing after the removal of the valve housing. It is secured to the casing in place of the valve housing by means of appropriate cap screws 3, the flange 2 on diametrically opposite sides being formed with radially disposed slots 4: through which screws 3 pass to thread into the engine casing.

Within the tubular member there is carried a valve seat reamer 5 which is of tubular form, this reamer 5 at one end being of conical shape and provided with teeth 6 on its conical surface, this end of the reamer conforming to the valve seat to be reamed, so that the teeth may operate on the valve seat to restore it to the proper shape, after the seat has become worn.

The reamer is adapted for free turning movement in the tubular member 1 and if it is axially alined with the valve stem guide seat, as it will be when the guide element of the device is attached to the engine casing, the seat will obviously be turnedv true when the reamer is operated.

In the device provision is made for truing or reaming the valve stem guide and to this end there is provided a'reamer 7 of slightly tapering shape to permit its readily entering the valve stem guide. The passage of this reamer 7 through" the valve stem guide will serve to'true that if the reamer is properly alined. Provision is made for such proper alinement by providing the reamer with a shank 8 of approximately the size of the valve stem. This shank 8 connects with a larger shank 9 whichpasses through the tubular valve seat reamer 5, being snugly carried in the latter which insures the reamer 7 being properly alined with the reamer 5 and, since this is properly alined by means of the guide element of the device, the reamer 7 is perforce properly alined. The reamer 7 is turned by hand and to this end the upper end of the shank 9 is formed with a square or polygonal head portion 10 the distance between that and the diagonally opposite corners of which is equal to or less than the diameter of the shank 9, so that the shank 9 may be slid through the reamer 5 from either end. This square or polygonal head 10 is provided for engagement with a suitable Wrench or handle 11 by means of which the shank and with it the reamer 7 may be turned. The reamer 5 at the end remote from the cutting teeth 6 is reduced in diameter, as indicated at 12, thus providing a shoulder 13 adjacent the upper end; of the reamer 5. In surrounding relation to this reduced portion 12 there is an externally threaded collar 14: which screws into the upper end of the tubular member of the guide element, the latter bein externally threaded at. its upper end. 'lhis collar 14 at one end is formed with a square or polygonal portion 15 with which a suitable wrench may be engaged, so that the collar may be turned. If turned in a direction to screw it into the sleeve member 1, the lower edge of. the collar bears on the shoulder 13 and serves to force the reamer 5 against its'work. The collar 14, therefore, acts as a feeding means for the reamer 5. r

The reamer 7 is designed to be turned in dependently of the reamer 5 but in order that the handle 11 may serve to turn both reamers simultaneously, the shank 9 of the valve .stem guide reamer isv formed with a peripheral groove 16 in which there seat the ends of set screws 17 passed radially through the reduced portion 12 of'the reamer 5 at diametrically opposite points. If the set screws 17 be. loose the reamer 7 may obviously be turned independently of the reamer 5, the latter at-this time acting only as a guide for the reamer 7. If the two are to be turned simultaneously however, the tightening of the screw 17 effects an operative connection between the two reamers and the turning of the handle 11 will serve to rotate both. As the teeth of the two remove chips from the parts upon which they are working the. collar 14 may be turned to force it against the shoulder 13, whereupon both reamers are fed to their work and if both are being rotated, both the valve seat and.

with the first said reamer, and means whereby the one reamer may be turned independently of the other or the two turned in unison.

2. A tool for the purpose specified consisting of a guide element attachable to an engine casing, a valve seat reamer carried by the guide, a valve stem guide reamer also supported by the guide and axially alined with the first said reamer, means for rotating the valve stem guide reamer, means for operatively connecting the seat reamer with the said guide reamer, and means for feeding the seat reamer to its work.

8. A tool for the purpose specified embodying a guide element consisting of a tubular member and a flange, means for at.- taching the guide element to an engine casing adjacent the valve seat, a tubular valve seat reamer carried 1n the tubular member.

of the guide element, a valve stem. guide reamer having a shank disposed within, thetubular member and a. flange, mean-sfor at:

taching the tubular element to an engine casing ad acent the valve seat thereof, a tubular seat reamer disposed wlthm the tubular member. of the guide element, said reamer being formed with a shoulder adjacent its upper end, a collar threadingly engaged in the tubular member of the guide element and bearing upon said shoulder, a gulde reamer formed with a shank disposed within the tubular seat reamer, means for turning the seat reamer, and means for securing the shank of the guide reamer to the.

seat reamer, whereby onereamer may be turned independently of the other or. the two turned in unison,-the aforesaid. collar providing means for feeding the said reamers to their work. r

In testimony whereof I aflix my signature.

ROBERT M. CHADSEY;

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