Патент USA US2406570код для вставки
Aug. 27, 1946'. ’ ‘ ‘ - sPRUNG ivALvE FACING DEVICE . ' 2,406,570 - Filed Junej5, 1945 "/27 IN VEN TOR. Jiffy/9 .D. Ask/‘((47.7 MM wit,‘ Arrys 2,406,570 Patented Aug. 27, 1946 UNITED STATES PATENT ' OFFICE’ ’ I ‘ 2,406,570 ' ' ' i j ' ., VALVE FACING DEVICE Ralph D. Sprung, Rosemead, Calif. Application June 5, 1945, Serial No. 597,639. 1 Claim. (Cl. 51—237') The present invention relates to new and use ful improvements in grinding machines for fac ing or re?nishing valves of internal combustion engines and the like, and more particularly to a holder for the valve embodying means for moving the valve toward and away from a grinding wheel, and also for adjusting the valve to different an gles relative to the grinding wheel, to conform to the angle of the seating face of the valve with the axis of the valve stem. An important object of the present invention is to provide a valve holder of this character by means of which the valve may be rotated during 2 byv a disc l5 welded or otherwise secured thereto and welded or‘ otherwise suitably secured to‘the disc is a wheel ll having a handle l8 for rotating thesleeve in the holder. To the other end of the sleeve I5 is secured a conventional form of chuck l9 within'which a valve stem 20 is secured, the valve stem having the head 2! formed thereon, to be refaced by a motor-driven grinding wheel (not shown) also a 10' mounted on the bench 8. Threaded through the disc 16 is a screw "22 having an operating wheel 23 secured at its rear end and having a head 24 at its front end formed with a conical recess 25 adapted to receive the , its engagement with the grinding wheel. Another object is to provide a device of this 15 inner end of the valve stem 20 for centering the valve stem in the sleeve [5 and chuck IS. character of simple and practical construction, The sleeve l5 has aflange 26 suitably secured which is e?icient and reliable in operation and thereto between the legs of the holder I3 and relatively inexpensive to manufacture, easy to in against which one end of a coil spring 21 is en stall in operative position on a work bench in gaged, the other end of the coil spring ‘bearing front of a conventional form of electric grinder, against the rear leg of the holder l3 to yieldably and which otherwise is well adapted for the pur ‘ urge the sleeve l5 forwardly away from the grind poses for which the same is intended. ing wheel. Other objects and advantages reside in the de An adjusting screw 28 is threaded through the tails of construction and operation as more fully hereinafter described and claimed, reference be 25 rear leg of the holder IS with its rear end adapted to abut the disc H5 at the rear end of the sleeve, ing had to the accompanying drawing forming the adjusting screw having a knurled manipulat part hereof, wherein like numerals refer to like ing wheel 29 for moving the rear end of the screw parts throughout, and in which: 28 toward and away from the disc I6 to func Figure 1 is a side elevational view with parts broken away and shown in section. ‘ 30 tion as a stop for the forward movement of the sleeve and to maintain the sleeve 15 rearwardly Figure 2 is a rear elevational view. with the beveled edge of the valve head 2| in en Figure 3 is a fragmentary sectional view taken gagement with the grinding wheel. substantially on a line 3—-3 of Figure 2. A leaf spring 30 attached to the rear leg of the Referring now to the drawing in detail, where holder l3 engages the wheel 29 of the adjusting 35 in for the purpose of illustration I have disclosed screw to secure the latter in its adjusted position. a preferred embodiment of the invention, the The holder [3 and base ID are moved bodily to numeral 5 designates an attaching plate for the ward and away from the grinding wheel by means valve holder secured to front and rear rails 6 by‘ of a lever 3| pivoted to one of the guides 9 by means of set screws ‘I for lateral adjustment of means of a pin 32 and having a vertically extend the plate, the rails 6 being secured to a work 40 ing slot 33 adjacent its pivoted end in which a bench or the like 8 in a position adjacent a con pin 34 carried by the base Ill is received, the holder thus being moved longitudinally in the (not shown). I j guide 9 by the manipulation of the lever 3|. The plate 5 is formed with a pair of longitudi To the upper portion of the base In is formed nally extending, spaced-apart guides 9 between 45 a dial plate 35 and to the under side of the holder which an upstanding base I0 is slidably mounted, I3 is secured a plate 36 having avpointer or indi the base 10 having laterally projecting ?anges l I ventional form of motor-driven grinding wheel underlying the guides 9. cator 31 at one edge thereof cooperating with the ' markings 38 on the dial plate 35 whereby to indi Rising from the base It! is a bolt 12 on which a U-shaped tool holder I3 is mounted for rota 50 cate the angle of adjustment of the holder l3 on the base [0, so that the holder may ‘be adjusted tion, the holder l3 being secured in adjusted po on the bolt l2 and at di?erent angles in accord- " sition by means of a wing nut I4 carried by the ance with the angle of the valve head 2|. bolt. In the operation of the, device, the screw 22 and A sleeve [5 is slidably mounted in the legs of the holder I3, the sleeve being closed at one end 55 head 24 are adjusted longitudinally in the sleeve 2,406,570 I 5 by the wheel 23 in accordance with variations in length‘ of the valve stem 20 which is secured in the chuck I9 at the front end of the sleeve. The sleeve I5 is then slidably adjusted in the holder I3 by the adjusting screw 28 to bring the seating face of the valve head 2| into proper r '7 . Having thus described the invention, what I claimis: A valve holder for use while refacing a valve and including an attaching member, a pair of spaced parallel guides on said attaching mem ber, an upstanding basesslidably mounted in said grinding relation with the grinding wheel. As the seating face of the Valve head 2| is re surfaced'byvthe grinding wheel, the valveliszro- * guides, a, lever pivoted to one of the guides and operatively engaged with the base for slidably actuating the base, a U-shaped support pivotally tated by the handle l8'and wheel I"! vattached to 10 mounted on the base‘ for horizontalswinging the rear end of the sleeve for thus rotating the movement, means for securing the support in sleeve in the holder.‘ :pivotally adjusted position on the base, a, sleeve ' The valve holder l3 and base l0 maybe moved I’ bodily by th'e lever 3| in the guides '9 to move the valve head 2| toward and away‘ from the grinding wheel. I , _ It is believed the details of construction; oper ation and advantages of the device will be readily ' understood from the foregoing without further detailedeXplanation. While ‘I have ‘illustrated and described a pre ferred construction for carrying out my inven slidably and rotatably mounted in the support, means at one end of the sleeve for securing a valve stem ‘therein, an adjusting screw extend ing longitudinally in the sleeve, a head at/the ‘inner-end of the screw" having a conical recess 7 adapted- to receive the inner end of the valve stem to center the valve stem in the sleeve, 20 spring means between the support and the sleeve for. urging the‘ sleeveforwardly in the-support, an: adjusting screw ' between the sleeve’ and ‘ the tion, it is apparent that various changes in con; support for'limiting forward movement‘ of the struction and arrangement of the parts may be sleeve; and'a hand wheel at‘ the rear end; ofthe made without departing from the spirit of the 25 sleevetfo-r'the manual rotation thereof. invention. 'RALPHTJD. SPRUNG.