US1999322A - Valve seat grinder - Google Patents

Description

April 30, 1935. T, D, ENE-rE l;9919,322

VALVE SEAT GRINDER April 30, 1935. r, D, ENETE VALVE SEAT @BINDER Filed Nov. 2., 1934 3 Sheets-$11861'l 2 Inventor Attomey April 30, 1935. T. D. -ENETE VALVE SEAT GRINDER 3 Sheets-Sheet 5 Filed NOV. 2, 1954 Inventor ,E Engg? v v Attorney Apr. 3o, i935 l 1,999,322

UNITED STATES PATENToFFlcE VALVE SEAT GRINDER Truman D. Enete, Janesville, La.

Application November 2, 1934, Serial No. 751,224 5 claims. (c1. 51-241) This invention relates to an improved valve In the drawings: seat grinder and it has more particular reference Figure 1 is a view, partly in section, and partly to an electric motor driven type utilizing an in elevation showing the complete assembly with abrading tool appropriately adapted to the par' the parts constructed in accordance with the 5 ticular surface to be worked on, principles of the present invention and illustrat- 5 Briefly, the preferred embodiment of the ining the manner in which it is used in conjunction vention includes an electric motor having a rowith a motor block.

tary abrading tool centrally arranged, and ad- Figure 2 iS 8 bOttOIn Plan View Showing the iustable supporting means for said motor allowfeatures appearing on the base plate or disk of ing the motor to be revolved bodily around a the motor casing. 10 fixed axis so that the tool may travel in a circular Figure 3 is a horizontal sectional view through path to provide the desired orbital motion and the lower portion 0f the Structure illustrated in rotary grinding action and to thereby insure Figure 1, the section being teken 0n the plane 0f positive results. the line 3 3 of Figure 1.

Needless to say, I am sufficiently cognizant of Figure 4 iS a fragmentary detail view showing 15 similar prior art valve grinders to admit that an the attaching lug Provided fOr Securing the electrically driven grinder is not new. It fol- Special -tcOl reStin Placelows, therefore, that 1t is my primary purpose and Figure 5 is a view 0f the tool rest supporting aim to generally improve upon known valve post which serves as a relatively stationary pintle grinders of this particular type be they marketed and Divot meanS- 20 or patented and to accomplish this through the Figure 6 iS e Perspective View 0f an adapter instrumentality of a structure characterized by bracket fOr an implement clampnoteworthy improvements and refinements. Figure 'l iS an elevational View Showing the @ne structural feature and its accompanying Ine-nner in which the adapter bracket and tool advantage has to do with a turnable hollow Clamp are assembled t0 provide Stone dressing and spindle adjustably mounted on the base of the trlling meenS motor so as to permit it to be regulated with re- Figure 3 iS c detail Perspective assembly View spect to the associated pintle means to allow the Showing the clamp and truing device or impleorbital path or movement of the rotary abrading nienttool to be regulated according to the diameter of Figure 9 iS a detail Sectional View 0f the ad- "o the seat being ground. luStable Clamp.

A further feature has to do with the provision Figure l0 iS e View Similar t0 Figure 6 Showing oi a special tool rest or post which includes as e Slightly differently Shaped adapter fixture 0r r" one of its features an adjustable pintle pin for bracket fer the clamp, this particular part being cooperation with the hollow spindle so as to al- Variable aCCUYdng tothe type 0f abladlng Stime o low the abrading tool and associated parts to be usedadjusted toward and from the valve seatso that Figures 11 *md 12 are detail eleVatlOnl VleWS it may be properly beveled as conditions require. 0f different types 0f @fading-150015 A further feature oi' the assemblage has to do Referring mst t0 Figure 1 it Will be QbSeIl/'ed with the provision oi' interchangeable abrading thajt the numeral '3 designates aPQrtable light' 4U tools and an attaching and operating shaft there- Welght highfspeedmotor- This 1.5 0f appmp for which provides the desired range of adjustate type so far as 1t relates to delivery and gen' ment believed to be practical for the purposes Hamon Pf Current but preferably 1s m the fon.

45 desired within reasonable limits. ci a umversal type Iotor lsmc tht nqtor tls 45 o no consequence, mere y ca a en ion o pautresattraitsreiterati.. gereserveerde fixture or bracket designed for detachable mount- 'y' base plate I4 which is of disk-like form is promg on the base plate of the motor and provlded vided with a central bearing l to accommodate 50 with a umg or dressing implement for the pur* the motor shaft I6. The motor shaft extends 'r pose of conditioning the abradant element or through and beyond the cent1-a1 aperture in Stonethe base plate and is formed with a screw-thread- Other lectures and advantages will beccme ed bore which serves as a socket to accommodate more readily apparent from the following dethe screw-threaded shank l1 of the abrading tool sorlption and drawings. ls. This tool includes a beveled portion w in 55 its shank to which the stone or abradant head 24 is attached. It is to be pointed out that the abrading tool will vary in shape and proportions according to the particular taper to be placed on the valve seat. For example, the types of tools shown in Figures 11 and 12 are frequently employed and these are merely distinguished, as a matter of convenience, by the numerals 2i and 22. Flmdamentally, however, they are standardised and interchangeable with respect to the tool I3. Therefore, it will be observed that so far we have an electric motor with a shaft I3 constructed to accommodate the interchangeable tools I3, 2l, and 22. In each instance the tool iscentrally arranged with respect to the base plate I4 and it is adapted for cooperation with the beveled valve seat 23 in the motor block 24. The motor block shown is provided with the usualy cavity or recess 25 and valve stem guide 25. Advantage of this feature 25 is taken so as to use it in the accommodation of a special supporting post unit denoted by the numeral 21 in Figure 5. This post-unit may vary slightly and the one shown in Figure 5 is not exactly the same as the one shown in Figure 1. Fundamentally however, the post includes a cylindrical stem portion 23 which serves as a pilot and which iits into the guide and supports the post with the intermediate portion beveled as indicated at 23 and this provides a shoulder to prevent wobbling of the post when it is properly seated in the guide 25. 'Ihe upper end portion 33 is formed with a central screw-threaded socket to accommodate a pintle pin 3l which is threaded into it. This pin serves as a pivot element and the adjacent portion 33 serves `as a journal around which the special tool rest 32 turns. Thistool restisofspecialdesign.

In connection with the tool rest, I call attention mst to Figure 4 wherein it will be observed that the numeral 33 designates a lug havinganendlessgrooveuformedinit. Thislug is formed integral on the base plate I4 and located eccentrioslly with respect to the centralined grinding tool. The attaching neck 35 of the tool rest is constructed to accommodate this lug, or rather, fits on this lug and is clamped firmly in place by a tightening bolt or screw 35. 'Ihe stem of this rides in the groove 34 allowing the entire part 32 as a unit to be turned for adjustment. The complementa] portion oi thetoolrest32isinthenature ofasleeve or v ranged tool rest vunit 3| which is itself adjustable,

it is possible to place the post unit 21 in the existing guide 23 and to then slip the sleeve 31 down over the journal 35 to provide an effective turning support for the motor I3. Consequently, the abrading tool I3 can be swung around in an orbital path sov that as it turns on its own axis it may travel in said path to uniformly sri-nd the seat 23 in an obvious manner. The sensitivity of the grinding action can be controlled by raising and lowering the pintle 3i which is in a sense an adjustable pivot. In other words, the pressure can be regulated and by resorting to experience plus trial and error, the

user of the device can soon adjust it for expeditious and satisfactory grinding work.

In addition to the grinding means, it is to be observed that the base plate is provided with a keeper seat or groove 33 and this is adapted to accommodate the special adapter bracket of the type denoted by the numerals 39 and 45, in Figures 6 and l0, respectively. 'I'hese brackets will vary according to the types of tools or stones employed. In each instance, however, the bracket includes a shank 4I whereby it is slipped into the seat 33 and fastened in place by a set screw -or the like. In addition, it includes a shaft portion 42 of rectangular form which is adapted to accommodate the slidable clamp 43. This clamp is constructed to accommodate a retaining screw 44 and a special adjustable conditioning implement 45. This implement 45 is provided with a so-called diamond point 45 which can be properly adjusted in relation to the beveled surface of the grinding stone to resurface the stone or to otherwise dress and condition it for more satisfactory work. In other words, advantage is taken of the rotary stone feature to employ this adapter anddressing means in association therewith to add to the range of utility of the invention as a whole.

It is evident that novelty ls predicated upon the centralised interchangeable abrading tool feature-which is electrically driven, together with the pivot-equipped post and special tool rest associated therewith. The tool rest is aninnovation in itself in that it is cccentrically mounted on the lug 33, and turnable around said lug so as to adjust the offset bearing sleeve and to there by regulate the position of the stone and to change its orbital path according to the diameter of the valve seat being ground. All of these features have been carefully selected and mechanically coordinated to provide their proportionate share in developing a structure which, it is believed, transcends in importance and eiliciency electrically driven valve grinders of similar types.

It is thought that persona skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, sizeamirearrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

What is claimed is:

1. In a structure of the class described, a motor having a cover plate provided with an eccentrically arranged outstanding lg having an endless groove, a tool rest including a casting having a neck forming a socket for reception of said lug, said neck being provided with a clamping screw cooperable with said groove, said tool rest also including a longitudinally elongated laterally offset sleeve forming a bearing for the accommodation of a supporting post of the type described.

2. In a structure of the class described a motor having a cover plate provided with an eccentrically arranged outstanding lug, a tool-rest including a casting having a neck forming a socket for reception of said lug, coacting means between the lug and neck enabling said tool rest to be turned on its axis and retained in a predetermined set position with respect to the cover plate, said tool rest also including a longitudinally elongated offset sleeve constituting a bearing.v and a relatively stationary support including a post having adjustable means for reception in said bearing.

3. As a new article of manufacture, a component part of a valve grinding assemblage of the class described comprising a single casting having a neck forming a socket for reception of a complemental attaching lug, said neck being provided with a split portion carrying an adjusting and retaining screw and also including an elongated laterally oise't sleeve forming a bearing for the accommodation oi' a supporting post of the type described.

4. A valve seat grinder assembly o! the class described comprising an electric motor formed at its'working end with a centralized motor driven abrading tool, and further provided at the same end with an Yeccentrically arranged stationary attaching lug, a tool rest having a portion rotatably and detachably clampedfto said lug, said tool rest including a longitudinally'oiset elongated sleeve portion constituting a bearing; said bearing extending in approximate parallelism with said abrading tool and projecting beyond the tool,

a supporting post including a stem portion designed to fit in an existing guide passage in a complementa] motor block, the upper end por-v stem serving as a. pilot for reception'in an exist.

ing guide passage in a conventionall motor block, the intermediate portion ot said body being tapered and the upper or remaining portion being fashioned to provide a cylindrical journal and,

being formed with a central screw threaded bore. a threaded end being adjustable in said bore. 4the upper end of said pin having the function oi! a pivot pintle, an electric motor provided with a centralized motor driven abrading tool, provided alongside of said tool and eccentrically thereto with a nxed attaching lug. a tool rest rotatablf'm anddetachably clamped on 'said lug and includ- 'mman n. zum

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