US 1442804 A
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Patented dan.. Z3, i923. i i A HARRYAH. HICKS, OF HELIX, OREGON.
Application filed February 11, 1919. Serial No. 276,249.
To @ZZ fio/mm t may conce/Mi.
Be it known that i, HARRY clninnnrr HICKS, a citizen ot the United States, residing' at Helix, in the county of Umatilla, State oft Oregon, have inventeduew and useful Valve-Seat `Fleamers; and. i do Ahereby declare the 'following' to be a full, clear, and enact description of the invention, such as will enable others skilled in the art to which it appertains to malte and use the same,
The invention relates to adjustable reamers and has for its object to provide a reamer of this character, wherein it will be possible to adjust the cutters thereof so that they will reain or out at various angles. This reaming` at variousv angles is necessary particularly in valve seats ot different types or' internal combustion engines, when it becomes necessaryto regrind and reseat the valves of the engine.
A 'further object is to provide an adjustable valve seattreamer having a body inem` ber adapted to be rotated, and to provide said body member with a series ot radially arranged cutter blades slidably mounted in arcuate slots,'the upper ends ot the cutters being resiliently held by a spring and adjustable means contacting with the lower ends of the cutter blades so that the cutters may be forced upwardly, in the arcuate slots so as to change the angle oi their out ting edges, also to provide the body member with a depending' portion so that said portion when passed through the guide oi the Valve stem will guide the reamer at its proper' angle during' the roaming operation. The angle of adjustment of' the cutters is generally trom 25 to `65 degrees, therefore the cutters on their curved edges may be provided with graduations, whereby the angle of the cutting edges of the cutters may be easily and quickly adjusted.
ith the above and other objects in riew, the invention resides in the combination and arrangement of parts hereinafter described, shown in the drawings andL claimed, it being understood that changes in the precise embodiment of t-he invention may be made within the scope oi' what is claimed without depa-rtii'ig from the spirit oic the invention.
In the drawings Figure l is a side elevation of the reamer, showing the same partly in section and in position tor reaming a valve seat and its guide member in the valve stem guide.
Figure 2 is a sectional View tl'irough the reamer taken on line 2-2 ot' Figure l.
Figure is a horizontal sectional View taken on line BH3 oi2 Figure l.
Figure L is a perspective view ot one of the cutters, showing' the graduations on the edge thereof.
Referring to the drawings the numeral, i designates the body oi the reamer., which comprises the head 2 and the shank 3. A pin 4 passes through an aperture at the upper end of the shank, said pin forming means to be grasped by the hands so that t-he reamer may be rotated during a reaming operation. The head 2 is preferably conical in shape so that its surface 6 willV taper downwardly and inwardly. Arouate slots 7 are provided in the head 2 and are radially disposed, there being; preiierably eight slots, however it is to be understood that the numberof said slots may be increased or diminished as desired. Cutters 8 having` curved edges 9 ot the same curvature as the wall l() oi the arcuate slots are dis posed in the slots 7. cutting' edge llwhich is straight and adapted to be arranged at dierent angles so as to conform to the angle that it is desired to ream the valve seat l2 ot the engine.
The cutters 8, near their upper ends are provided with apertures l) and extending; through said apertures is an endless coiled spring' 14. However it is to be understood that instead oi the coiled spring, a split spring wire spring` may be used theretor.
r'he head 2 is provided with a threaded aperture 26 for the reception of a threaded extension 27 which is threaded therein and is providedavith an adjusting' meinher 27, `Eidension 27 of the adjusting n'ieinliier is provided with partially threaded aperture 28.. the threaded partoi which receives the threaded portion Q9 oi the reamer gold-- 23: rhe upper end oi the aperture 2S not threaded and as shown at 30 and adapted to receive the portion. et ti guide 25a. This portion 31 et' the gruie terminates in a point 32, which engages th walls 33 oi the upper end ot the portion or the aperture QS. The upper end ot th extension 27 is provided with siots Bt so that when the tapered end of the portion 3l is forced into engagement with the walls ot the split end ot portion 27 said portion will be locked. against rotation in the Each cutter' 8 has threaded aperture 26. The adjusting nut E27 is provided with a liang'e 27h which engages the bevelled surfaces Sl at the lower ends of the cutters 8, thereby forcing the cutters to slidably move in 'the arcuate slots 7 of the reamer head 2 against the action of the coiled spring la as the adjusting nut 272L is screwed upwardly in the threaded aperture QG. Vhen the adjusting nut 27 is screwed downwardly the coiled spring l-l- 'will cause theK cutters to keep in contact with the iange QT" of the adjusting nut 27,
I'Vhen it is desired to ream a valve seat, the necessary angle ot' which is known, the adjusting member 27 is adjusted upwardly or downwardly against or with the tension of the spring llt which passes through the apertures in the upper ends ot the cutters, the operator vwatching the graduation on the curved edge of the cutters, and when the desired graduation is in registration. with the edge 35 ot the reainer head Q the adjusting of the adjusting member 27 is stopped. .It will be seen that by moving the, adjusting member upwardly, said adjusting member Q7 will force the cutters to slide in the arcuate slots 10, against the action of the spring 14, this Sliding changing the angle or' the cutting edge of the cutters. Also that any downward ymovement of the adjusting` member 27 will allow the spring la to cause the cutters to move inwardly at their upper ends, thereby changing the angle of the cutting edge of the cutters 'in the other direction from that causedby an upward movement of the adj Listing member 27'.
The invention having been set Jr'ortli,\vl1at is claimed as new and useful is A reainer comprising a conically shaped head, segmentally shaped cutters radially disposed in segmentally shaped grooves in the conically shaped head, the upper ends or said cutters being` spaced from the conically shaped head and provided with apertures, a coiled spring extending through said apertures and around the conically shaped head in registration with an annular groove in the head and adapted to be received therein, the lower ends of the segiuentally shaped blades being provided with inwardly and downwardly extending surfaces, an adjusting screw threaded axially into the head, said adjusting screw being provided with an outwardly and upwardly extending flange, said outwardly and upwardly extending flange co-operating with downwardly and inwardly extending sur- `taces of the blades Vtor adjusting said blades angularly in the arcuate slots against the action of the spring.
In testimony whereot- I have signed my name to this specilication in the presence of two subscribing witnesses.
HARRY H. HICKS.
k'Vitnesses i L. D. SMITH, GEO. W. PIPER.