US1493330A - Valve grinder - Google Patents

Description

May 4es 1924. l 1,493,330

l W. FAIN ET AL VALVE GRINDER 5 Sheets-Sheet 1 Filed Jan. 24, 1923 f Il @im @sus @5mm WITNESS:

, w. FAIN ET AL,

May 6 VALVE GRINDER Filed aan. 24, 1923 s sheets-sheet 2 INVENTOR ATTORNEY WITNESS:

INVENTOR WITNESS: K AITORNEY Patented May 6, 1924.

UNITED STATES meant r'AralarA ortica, t

WILLIAM FAIN AND ARTHUR REES,"QF COALGOOD, KENTUCKY.

VALVE GRINDER.

Application filed January 24,1923.l Serial No. 614,606.

To all whoml t may concer/rb.'

Be it known that we, VILLrAM FAIN and ARTHUR Runs, citizens of the United States, residing at Coalgood, in the county of Harlan and State lof Kentucky, have invented new and useful Improvements in Valve Grinders, of which the following is a specification.

This invention relates to tools for use in connection with repairing automobile engines and the like and has for its object the provision of a novel gear operated device adapted toy be bolted onto an engine and operable to grind simultaneously all the valves, the device thus operating as a great time and labor saver.

Another object is the provision of a device of this character which may be `used for grinding all the valves' of an engine regardless of how many cylinders and valves there may be, the device being capableV of attachment at dierent locations upon vthe cylinder block whereby to grind the valves in groups until the entire number has been treated.

A further object is the provision of a grinder of this character which includes supporting brackets detachably and adjustably mounted upon thev cylinder block and pivotally carrying the valve grinding mechanism which is itself adjustable with respect to the supporting brackets.

Yet another object is the provisionk of a device of this character in which the valve engaging members and the centering devices therefor are adjustable longitudinally of their supports so that the device may be used to equal advantage regardless of whether the valves be close together or comparatively far apart.

An additional object is the provision of a device of this character which will be comparatively simple and inexpensive in manufacture, easy to operate, positive in action, efficient and durable in service and a general improvement in the art.

With the above and other objects andadvantages in view the invention consists in thc details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a plan view ofthe device,

lFigure 2 is a sideelevation thereof mount edv'upon an engine,

'Figure 3 is' a cross section,

Figure 6 is a plan view of the centering plate,

Figure 7 is a detail sectional view through one of the operating gears and showing the mounting of the valve grinding member,

Figure 8 .is a longitudinal section through one of the gea-r members and-showing the valve 'grinding tool in fragmentary elevation and also illustrating ther-action of the tension regulating means, y j

Figure 9 is a detail sectional view showing the mounting of the 'rack bar,

Figure 10 is a detail plan view showing the upper and lower members ofthe slides detached, Y

Figure 11 is a detail edge elevationv showing the manner ofhingedly connecting the bracket members,

Figure 12 is across section on the line 12-12 of Figure 8,

Figure 13 is a cross section on the line 13-13 of Figure 8 and Figure 14: is a detailcross section on the line 14C-14 *ofv Figure 8.

Referring more particularlyto the drawings the letterA designates a cylinder block andB representsl the valves to be ground. i

C represents the studs whichy project upwardly from the cylinder block and which are exposed when the cylinder head, not shown, is removed.

In' carrying out our'invention we provide a pair of `bracket members designated broadly `by the numeral 15,'k each of which in'-l cludes an L-shaped member 16 designed to be placed upon the top of the cylinder block `and formed with an elongated slot 17 for -the accommodation of .one of the studs C, it beface 19. Each bracket 15 further includes* a substantially L-shapedbracket member 20l terminating in an ear21 `having a serrated face 22 co-operating with the face 19, and the bracket members 16 and 20 areA connected by a bolt 23 which passes through the earsL 18 and 20 and which carries a clamping nut 24. The bracket members 20 are formed with bifurcations 25 yfor the reception of` an` .f

elongated preferably rectangular base plate 26 which is held within the bifurcations by means of wing screws 27 or the like. By this construction it will be seen that the base plate 26 may be positioned at any desired location in spaced relation above the cylinder block and that by loosening the nuts 24 the base plate may be swung so as not to be in obstructing relation to the cylinder block so that access may be had to the valves or other mechanism.

The base plate 26 is formed with a longitudinal slot 28 which has its sides recessed as shown at 29. Slidably adjustably mountl ed upon this base plate are bearing members designated broadly by the numeral 30 and each of which includes a. plate 31 lying within the recess 29 and Jformed with areduced extension 32 fitting within the slot 28. Each plate 3l is formed with an extension v33 through which passes a suitable set screw 34 for clamping the bearing members at adjusted positions along the slot and recesses. Disposed below the base plate 26 in engagement with the underside thereof and associated with each bearing member 30 is a disk or other plate 35 secured to the reduced extension 32 by means of suitable screws 36. By this construction it will be seen that the bearing members 30 may be slid to any desired position along the base plate while upward or downward displacement thereof is prevented and they may also be rigidly secured or clamped at such adjusted positions.

Journaled through each bearing member 30 is an elongated sleeve 37 having formed or secured thereon a spur pinion or gear 38 which is disposed above the base plate 26. The lower end of each sleeve is formed with a reduced bore 38 angular in cross section for slidably holding the shank 39 of a valve engaging tool 40, the shank being held against displacement, while permitting longitudinal movement, by means of a spring 41 mounted upon the lower end of the sleeve and having an inwardly extending bent portion 42 constituting a catch and movable through a notch 43 in the sleeve so as to engage within a groove 44 in the shank. The spring 41 has its free end extended outwardly in a curved direction as shown at l45 to facilitate its being grasped for the purpose of disengaging the bent catch portion 42 from the groove 44 so that the tool may be removed when desired. At a point spaced below its upper end each shank 39 is formed or otherwise provided with a collar 46 against which abuts the lower end of a coil spring 47 located within the sleeve and having its upper end engaged by a block 48 having a reduced extension 49 fitting within this spring. The purpose of this spring is to urge the valve engaging tool 40 downwardly andyet to permit it to yield upwardly. The center of the upper surface of each block 48 is formed with a slight depression 50 for a purpose to be described and each block is held in position, within the sleeve by a split spring ring 51 engaged within a. groove 52 in the inner wall of the sleeve.

Formed upon one end portion of the base plate 26 is a bracket member 53 carrying suitable bearings for a shaft having a crank handle 56 and carrying a disk or fly wheel 57. Slidable upon the base plate 26 is a rack bar 58 meshing with all the pinions 38 and prevented from lateral displacement by an unstanding flange 59 on the base plate. Upward displacement of the rack bar is prevented by lips 60 which overlie it and which are formed on brackets 61 recessed into the iianged edge ot the base plate and detachably secured thereon by suitable screws 62. The purpose of these brackets will be hereinafter explained. Carried by the disk 57 is a wrist pin 63 with which is connected a pitman 64 connected with a piu 65 carried by the rack bar 58. By rotating the crank handle 56 it is apparent that the rack bar 58 will be reciprocated for turning all the gears 38, and consequently the valve engaging tools simultaneously.

In addition to the brackets 61, we provide other brackets 66 which are secured upon the ends of the base plate 26 by means of suitable screws 67 and these brackets 66 extend preferably to the same height as the brackets 6l. It should be stated in passing that the brackets 6l are formed with inwardly extending lugs 68.

The numeral 69 designates the upper or centering plate which is spaced considerably above the base plate 26 and which has one edge resting upon the lugs 68. This centering plate is pivotally mounted with respect to the brackets 66 by virtue ot screws k7() which pass through the upper ends of the brackets 66 and which have Unthreaded ends engaging within sockets 71 in the rear corners ot the ends of the centering plate. The centering plate is held against casual pivotal movement by means ot screws 72 which are threaded through the upper ends of the brackets 61 and into sockets 73 in the forward edge of the centering plate.

The centering plate is formed with a lon gitudinal slot 7 4 located above the slot 28 in the base plate `and slidably mounted along this slot are bearing members desig nated broadly by the numeral 75. Each bearing member includes a plate 76 disposed upon the top ot the centering plate and formed with a reduced extension 77 fitting within the slot 74. Each `plate 76 is more over provided with an extension 78 through which passes a set screw 79 engaging the top of the centering plate for holding thel bearing members in adjusted position in alignment with the bearing members 30.'

Each bearing member 75 also includes a Aifiearsso disk ci' other plate SO secured Iagainst the lowerend ot the associated extension TT by means of suitable screws or the like. The bearing members T5 are formed with threadcd bores through which are screwed adjusting screws Sl which have tapered ends engaging within the depressions in the locks 4S. By adjusting these screws it is apparent that the tension of the springs l? which engage the valve grinding tools ma be regulated so that the valves will bear with the desired pressure upon their seats.

In the operation of the deviceit will be seen that the brackets l5 are mounted upon the cylinder block in such a position that the valve grinding members 40 will be in proper position to align with the valves, the bearing members BO are slid along the base plate 26 to bring these valve engaging tools properly in engagement with the valves and the set screws are tightened to maintain the adjustment. The centering plate is swung into position and held by the set screws 72, and the screws 81 are run up so that their ends may clear the upper ends of the sleeves 37. The bearing members 75 are then slid along the centering plate 69 until these screws 81 are in direct alignment with the sleeves 37, aiiter which the screws 79 are tightened to maintain the adj ustment.r The screws 8l are then turned down until they engage the blocks 48 and the degree of turning depends upon the pressure desired to be exerted upon the valve engaging tools. After everything has been thus set, the operator grasps the handle 56 and turns the shaft whereupon the action ot the pitman 64: will result in reciprocation oi the rack bar 5S and consequent rotation ot the gears 38 and valve engaging tools. In this way the valves are alternately7 turned in opposite directions s0 that they may be ground properly t0 their seats it being of course understood that some suitable valve grinding compound must be applied to the valves or their seats.

The device is here illustrated as being built for use in grinding the valves of a tour cylinder motor thong it should be understood that it may be constructed longer for grinding the valves of engines having a greater number of cylinders, or it preferred, after the eight valves are ground the position of the device may be shifted so that the other eight may be ground or else two members .may be left inactive at the first action so that only six valves will be ground,

the remaining six being ground by a subsequent similar operaticn. However, these mat-ters of arrangement, sizes and mode oi operation are immaterial as the manufacturer may exercise his own judgment as to sizes capable oit most general use. iiese and other details of construction, matenais, atee are principally to be worked in actual prac-tice and the right is reserved tomake such andothei changesprovided that they do not depart from the spirit of the invention or the scope o'l the claims.

l-iavingl thus described our invention we claim: j I t l. valve grinding machine comprising a supporting plate provided with attaching feet for connection upon the cylinder block oil kan engine, a plurality ot sleeves journaled through said plate and carryingv pinions, ,a longitudinally movable rack. bar meshing with. said pinions. tor effecting `movement thereof, valve engagingtools devplate and bearing upon buttons at the upper endsof the springs.

2. A valve grinding apparatus comprising supporting brackets adapted for adjustable connection upon a cylinder block, a base plate hingedly mounted upon said brackets, bearing members slidably adjustably mounted along the base plate, sleevesjournaled through said bearing members and carrying gears, said sleeves being provided with chuck portions for holding valve grinding tools, a longitudinal movable rack bar meshing with all the gears and means for reciprocating the rack bar, and spring means within the sleeves normally urging thefva-lve engaging tools into engagement with the valves of the engine.

8. A valve grinding apparatus comprising supporting brackets adapted for adjustable connection upon a cylinder block, a base plate hingedly mounted upon said brackets, bearing members slidably adjustably mounted along the base plate, sleeves journaled through said bearing members and carrying gears, said sleeves being provided with chuck portions for holding valve grinding tools, a longitudinal movable rack bar meshing with all the gears and means Itor reciprocating the rac-k bar, and spring means within the sleeves normally urging the valve engaging tools into engagement with the valves of the engine, and means for varying the tension on said springs. 4. .fi valve grinding apparatus comprising supporting brackets adapted for adjustable connection upon a cylinder block, a base plate hingedly mounted upon said brackets, bearing members slidably adjustably mounted along the-base plate, sleeves journaled through said bearingy members and carrying gears, said sleeves being yprovided with chuck portions for holding valve grinding tools, a longitudinal movable lrack bar' meshing with all the ears and means iter reciprocating the rack ar, brackets rising from said base plate, a centering plate carried by said last named brackets, a plurality of bearing members slidably adjustably mounted upon the centering plate and formed with threaded bores, screws passing through said bores, springs within said sleeves urging the valve engaging tools downwardly, and blocks uponthe upper ends of said springs engaged by said screws.

5. A valve grinding apparatus comprising slotted Ibrackets adapted to be mounted adjustably upon the cylinder head retaining studs of an engine subsequent to the removal of the cylinder head, a main supporting plate carried by said brackets and formed with a slot, bearing members adjustably mounted along said slot, sleeves journaled through said bearing members and carrying gears, valve engaging tools detachably engaged within said sleeves, spring means within the sleeves urging said tools downwardly, and a longitudinally movable rack bar meshing with all of said gears.

6. A valve grinding apparatus comprising slotted `brackets adapted to be mounted adjustably upon the cylinder head retaining studs of an engine subsequent to the removal of the cylinder head, a main supporting plate carried by said brackets and Aformed with a slot, bearing members adjustably mounted along said slot, sleeves journaled through said bearing members and carrying gears, valve engaging tools detachably engaged within said sleeves, springmeans within the sleeves urging said tools downwardly, and a longitudinally movable rack bar meshing with all ol said gears, and a centering plate adjustably mounted above said main plate and carrying slidable adjustable bearing members carrying screws for varying the tension on said springs.

ln testimony whereof we affix our signatures.

WILLIAM FAIN. ARTHUR REES.

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