US2682136A - Rocker arm resurfacing machine - Google Patents

Description

June 1954 L. TALBOTT ET AL ROCKER ARM RESURFACING MACHINE 2 Sheets-Sheet 1 Filed May 2, 1952 INVENTORS 3 W AB L L Q M. m A a Wm m v 3 F L Y p B, W

June 1954 L. L. TALBOTT ET AL 2,682,136

ROCKER ARM RESURFACING MACHINE Filed May 2, 1952 2 Sheets-Sheet 2 118,8 q I P ggy 42 i2 Z 0 t J 3 INVENTORS FRANK 6. LA\DLAW LEONARD L..TA\ a-.oTT BY Patented June 29, 1954 UNITED STATES PATENT OFFICE ROCKER ARM RESURFACING MACHINE LeonardL. Talbott and Frank G. Laidlaw,

Reno, Nev.

Application May 2,1952,Scria1' No. 285,587

2 Claims. (Cl. 51-56) This invention relates to grinding machines, and more particularly to a machine for use in resurfacing valve rocker arms of internal combustionengines.

The main object of the invention is to provide-a-nove1 and improved rocker arm resurfacingmachine which is simple in construction, which is easy to operate, and which is adjustable to accommodate a wide range of sizes of valve ing of the rocker arm faces to the necessary curved surfaces recommended by automobile manufacturers for best operation of the rocker arms.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying, drawings, wherein:

Figure 1 is a side elevational view of an improved rocker arm resurfacing machine constructed in accordance with the present invention, showing a conventional rocker arm assembly mounted therein in position for resurfacing.

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

Figure 3 is an enlarged end elevational view of the structure shown in Figures 1 and 2.

Figure 4 is an enlarged transverse vertical cross sectional view taken on the line 44 of Figure 1.

Figure 5 is a cross sectional detail view taken on the line 5-5 of Figure 4.

Referring to the drawings, the improved rocker arm resurfacing machine is designated generally at H] and comprises a pair of elongated parallel rods H and i2 rigidly connected at one end by a transverse, vertical plate member l3 and rigidly connected at their opposite ends by an upstanding transverse vertical plate member I4. The plate member M is formed at its forward portion with the vertical arm l5 in the upper portion of which is secured an inwardly directed stud element l6 having a tapered point ll. Designated at it is a transversely extending upstanding vertical plate member generally similar in shape to the plate member 14 and formed with the vertical upstanding arm I9 at its forward portion. The plate member I8 is rigidly secured torespectivesleeve members 28 and it which are slidably mounted on the respective rods 12 and H, the sleeve member 26 beingformed with the clamping portion 22 having-the opposed parallel lugs 23 and 2d. Designated at 25-is a clamping screw which extends througlr the lug 2i and is threadedly engaged with the lug 23, whereby the portion 22 may be tightly clamped to the rod [2 by' tightening the screw 25, thus locking the plate member id in an adjustedposition on the rods H and i2.

The arm lfi has secured thereto the inwardly extending stud element 26 which is in alignment with and opposes the stud element Iii, the stud element 25 being formed with the tapered; point 2i which is in longitudinal alignment with:

and opposes the tapered point i? of stud element l6.

As shown in Figure 1, the stud elements it and 25 are adapted to engage in the ends of the shaft 23 of a conventional rocker arm assembly 29' to support said rocker arm assembly in parallelrelationship to the rods IE and i2 and in a pee sition elevated above the plane of said rods.

Designated respectively at 36 and iii are respective sleeve members slidacly engaged on the rods [2 and i I and having welded thereto the upstanding, parallel plate members 32 and 33.

which are rigidly connected by the respective transversely extending rod members 34 and 35,.-

said rod members 3t and 35 being located substantially at the opposite top corners of the plate members 32 and 33. The sleeve members 30 and 3!, the plate members 32 and 33, and the rods 34 and 35 thus define a rigid bracket memberwhich is slidable longitudinally on the rods H and i2.

Slidably mounted on the rod members 3d and 35 are therespective sleeves 35 and ill to which is rigidly secured a plate member 38. on the plate member Silland extending trans versely to the rods [2 and H are the parallel, inverted angle bars 39 and d!) which have secured to their outer top portions the respective arcuate clamping straps ll and Q2. The straps 4| and 42 terminate in the respective upstanding apertured lugs 43 and 44 through which extends a clamping bolt 45. Designated at 46 is an electric motor which is clampingly secured on the angle bars 39 and it by the clamping straps 4| and 42, as shown in Figures 3, 4 and 5. The shaft of the motor extends transversely with respect to the rods H and I2 and has mounted on its end the grinding wheel 41. Designated respectively at 48, 48 are coiled springs surrounding the rods 34 and 35 and biasing the sleeve members 36 and 31 toward the vertical longitudinal plane containing the axis defined by the stud elements [6 and 26.

Secured to the forward peripheral portion of the motor casing is the guard disc 49 which covers the upper portion of the grinding wheel 47 and which is formed with a relatively large V-shaped notch 50 at its lower portion, allowing a rocker arm to be rotated into engagement with the lower portion of the front face of the grinding wheel 41, as is clearly shown in Figure 1.

In using the device, the rocker arm assembly 29 is mounted in the manner shown in Figure 1, with the ends of the rocker arm shaft 28 engaging and supported by the stud elements [6 and 26, the plate member l8 being locked in a position wherein its stud element 26 supportingly engages the end of the rocker arm shaft 28 by tightening the clamping screw 25. As shown in Figure l, the rocker arm faces may then be successively rotated into engagement with the grinding wheel 41, the motor 46 being energized to rotate said grinding wheel. be successively resurfaced, the rocker arms being rotatable and the grinding wheel being yieldable rearwardly against the biasing force of the springs 48, 48, to allow the rocker arm faces to be correctly shaped.

It will be readily apparent that the bracket means defined by the plate member [8 and its supporting sleeves 20 and 2| is readily adjustable longitudinally on the rails H and I2 to accommodate rocker arm assemblies 29 of different lengths.

While a specific embodiment of an improved resurfacing machine for rocker arms of internal combustion engines has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed in the invention except as defined by the scope of the appended claims.

What is claimed is:

1. A machine for refacing rocker arms of an internal combustion engine comprising a pair of parallel guide rails, means rigidly connecting the ends of the rails, including an upstanding support member, a first stud element on said support member extending parallel to said rails, a first upstanding bracket slidably mounted on said rails, a second stud element on said bracket in alignment with and opposing the first stud element and defining therewith means for rotatably supporting the shaft of a rocker arm assembly in parallelism with said rails, a second upstanding bracket slidably mounted on said rails, an electric motor, means slidably supporting said motor on said last-named bracket for movement at right The rocker arm faces may then 3 angles to the rails, spring means biasing said motor toward the vertical plane of the stud elements, said motor being mounted with its shaft extending transverse to the rails, and a grinding wheel secured to the motor shaft, said grinding wheel being engaged and moved rearwardly against the bias of said spring means on rotation of said rocker arm, whereby to grind said rocker arm to the desired curvature.

2. A machine for refacing rocker arms of an internal combustion engine comprising a pair of parallel guide rails, means rigidly connecting the ends of the rails, including an upstanding support member, a first stud element on said support member extending parallel to said rails, a first upstanding bracket slidably mounted on said rails, a second stud element on said bracket in alignment with and opposing the first stud element and defining therewith means for rotatably supporting the shaft of a rocker arm assembly in parallelism with said rails, means releasably locking said bracket with respect to said rails, a second upstanding bracket slidably mounted on said rails, an electric motor, means slidably supporting said motor on said second bracket for movement at right angles to the rails, spring means biasing said motor toward the vertical plane of the stud elements, said motor being mounted with its shaft extending transverse to the rails, a grinding wheel secured to the motor shaft, and a guard disc secured to said motor and covering the upper portion of said grinding wheel, the guard disc having a relatively large V-shaped notch in its lower portion, thereby allowing a rocker arm to be rotated into engagement with the lower portion of the grinding wheel, said grinding wheel being moved rearwardly against the bias of said spring means on continued rotation of said rocker arm, whereby to shape said rocker arm to the desired curvature.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 238,366 Doane Mar. 1, 1881 492,451 Winkley Feb. 28, 1893 817,226 Davis Apr. 10, 1906 1,845,908 Cover Feb. 16, 1922 1,854,558 Olmsted Apr. 19, 1932 1,957,568 Wills May 8, 1934 2,128,023 Specht et al Aug. 23, 1938 2,205,541 Pizzotti June 25, 1940 2,309,615 Sunnen Jan. 26, 1943 2,419,179 Swindle Apr. 15, 1947 2,643,489 Helm June 30, 1953 FOREIGN PATENTS Number Country Date 619,401 Great Britain Mar. 9, 1949

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