US1218296A

US1218296A - Rotary valve.

Info

Publication number: US1218296A
Authority: US
Inventors: Albert E Moorhead
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-24
Filing date: 1916-07-24
Publication date: 1917-03-06
Anticipated expiration: 1934-03-06

Description

A. ER MOURHEAU.

ROTARY VALVE? APPLICATION mi JULY 24,1916.

A. E'. MORHEAD.

ROTARY VALVE. A'PPuc/Tvxou man luLY 24.1916.

Patented Mar. 6, 1917.

3 SHEETS--SHEE 2 (Nvt/v rok A. s. Maan/imno A. E. MOORHEAD.

ROTARY VALVE. Y

APPUCATEON FILED IUL]l 24, IBIS.

Patented M3126, 1917.

3 SHEETS-SHEET 3x UNI-TED STAWET OFFICE.

ALBERT E. MOQItIjIIE),l OE UKIAH, CALIFORNIA.

ROTARY VALVE.

misgaan.

To all whom it may concern.'

Be it known that I, ALnEa'r E. MoonnnAn, a citizen of the United States,residing at. Ukiah, in the county ofMendocino and State of California, have'invented new andalseful Improvements in Rotary Valves, of which theV following is a specification. i The present invention relates to improvements In rotary valves for "combustion engines, and the object of theinvention is to provide a rotar valve which will permit of high speed, w ich will be comparatively -no1seless, which will eliminate undue frictional resistance, the portof which will not leak, which can expand freely, in which the surface heat will be reduced, which will be independently flexible, and 1n which a superiorfoiling system can be used. Y

In the accompanying drawings, Figure 1 is a plan viewof an internal combustion engine equipped with my'improved valve, thev fj coverbeing removed and some of the valves being shown 1n horizontal section; Fig. 2 is-Y a broken bottom plan View of said cover; Fig. 3 is a broken longitudinal view of the 4engine; Fig. 4 4is a broken cross sectionalv view throughthe centers of the valves thereof; Fig. 5 is a similar view through 'valve' couplings; F ig. (l is a View. similar to Fig. 3 showing modifications of the invention; Fig. 7 is an end view of a modified form of valve; Fig. 8 is a longitudinal section of the same; Fig. 9 is'a transverse section of the same; Fig. 10 is a side View of an endl section of a valve; Fig. 11' is a face view thereof; Fig. l2 is a detail side view of a support for a handle; Fig. 13 is an -cnd view of the same; Fig.` 14 is an end View lof, the same showing the handle ina different Fig. 13.-

Referring to the drawinghl indicates a casting comprising the walls o'f cylinders 2. 3 indicates a second casting comprising the tops 4 of said, cylinders, Walls 5 of water jackets and the under sides (l of valve casings. -Copper gaskets l0 are interposed between the adjacent portions of the castings l, 2 and 3. 7 indicates an upper casting comprising walls 8 of water jacketsand upper sides 9 of valve casings. Said valve casings are spherical in form and in each valve casing is contained a` valve constructed in accordancewith my invention. .Y

The valve contains three, main parts, a

central partll and twoterminal parts 12. e y ,in the The central part 11 is approximat Specication of Letters Patent.;

position from that in Patented Mar. e, lair."

Application-Meli July 24, 19161 Serial No. 110,919.V

of a'sphere from which two `segments 'have been cut o'l" along planes parallel'with! each other. The terminal parts 12 are approximately in the form ofsaid segments; each segment having a cylindricalextension 13 from its center, said cylindrical'extensionl terminatin head 414. The adjacent globular heads of two adjacent valves are containedI in the ends of a tube 16, having in its ends o enended longitudinal `slots 17 throughwich i'n an enlargedv globular extend pins 18, which are'drivonA diametrally through the globular heads 14'in the respective ends. The pinsat opposite' ends of the tube are arranged at right angles with each other, and hence, if a rotary motion,

imparted thereto, be communicated :from

.either head to the other head, each head will sthbe capable of turning freely with* ref-,-

erence to the other head yinA a `plane throilgh the axis of the tube.

grooves

21, 22, forme in the. opposinglfa'es of the central and terininal lportions"ofthe' valve. It will readily be seen that *by Imeans ,Y This rotary motion is communicatedgby ."-"I means of keys 19A longitudinally. movablein of these keys, any rotary motionimparted lto.

a globular head will be communicated to 4the main or central portion of the valve, while at the same time the axes of'said main or central portion need not be in exact alinement with each other.

Each-terminal portion and the extension therefrom are formed witha dee axial 'recess 23 in which-is contained a celled spring '24 compressedbetween the bottom of the recess and the key 19, and therefore pressing said key4 against the'bottom of the' groove'fin the central portion of thevalvc and'press'in'g the segmental part of the terminal 'ortion of the valve against the spherical va' ve cas-V ing, thus making a tight trance to-said valve casing. I

4 The head of eachcylinder communicates by an axial passage 2G with a transverse pas'-` sage 27 leadin at its ends to two valve eham bers and wit i each end of the transverse v passage 27 can communicate a port 428 formed transversely in thecentral part 11 of the valve insaid casi'ngand extendin'geny4 tirely therethrough oncof 'said valves serv ing as the -inletvalve andthe other as the'y i exhaust valve. The ports'28thro'uglrthereP spe'lctive valvesv communicate ori/"the outside with transversely extending po/rtsr29, 3l), re- I spectively in thet valvewcasing', thelportf29 .handle 47.

v'of the sides -of the seat.

on one sideleading to the intake manifold and the port 30 on the other side to the exf haast manifold..

with a companion screw gear 34, said screw.

gears 33 and lbeing mounted on shafts 35,

36, rotating in bearings 3i', 38, and having on their ends globular heads operatively connectedl with the valves in like manner as are the globular heads of the extensions trom -the valves. lt will thusbe seen that the two valvesffor each cvlinder rotatein opposite directions, and each valve makes one-half of a revolution with two complete reciprocations ofthe piston in the cylii-ider, so that each end of the port 28- in each valve'is alternately the inletend and the outlet end.

Fig. 4 of thedrawings shows companion valves in the position in which the intake valve is full o iened, and the piston is about.

in the midd ofits downwardstroke drawing in gas 'from the carbureter. The coin- )ression of the gas and the explosion period th, take place before the, exhaust port of the other valve is open to ,the exhaust outlet.

For cooling the exhaust valve, I may pro-l vide anadjustable valve 41 lfor admitting- `water from the water 'jacket to the interior of said valve. SaidV valve 4l fits in a conical seat42 in, the exhaust valve casing, and

'has a stem 43 extendin through a -t'hreaded plug 44 andsurroun edby a. spring 45 bearing and the head of the valve 41.

i's yscrewed into a transversely extending lA set 'screw 48 isv provided to see-I lref-tlie handle wherever adjusted. A sheet 'metalseat ll) is 'provided between the handle-and the head of the threaded plug 44, said `seat having its sides bent upwardly, as shown at 51j, -the edges ot' aidsides being concave, as shown at 52, to

i 'lo vary receive said handle.

escapes troni the through which the water water jacket vinto theinteriorfot' thel exhaust .vlilie, the handle is screwed 'around the threaded `stein to the 'proper distance and is then caused to rest in the concave portions` small amount ol water is then admitted to .the interior ot' the vexhaust valve with each halt revolution of said valve, and, when the exhaust valve is. open to the cylinder and the'exhaust port 30, said water is immediately thrown out through said' port 30.

ln the modification of the invention shown in l*`igs..8 and l), a rectangular metal casing,

. the` space. between which and-'the outer wall of. the valve is filled with asbestosor other ved to the motionot' the -cal and always closing on 'l`lie leakage common in me- 105- tlie opening" valve mav be `nisin.

insulating material, forms the wall of the port 28.

The chambers 53 extendin longitudinally between adjacent globular va ve casings and containing the extensions 13. and heads 14 70 and tubes 16 surrounding the same, is filled@ with oil, and said extensions are formedi with `small openings 5l leadin from saidi chambers to the recesses 23, so tiat oil pene-` trates also the spaces 'between the central75 and terminal portions of the valves'.

Tt will be seen that the central portions` of'l the valves -need not fit tightly on both sides against the valve easing, provided that;` bothsides` near the ends ot' the port 28, ar of thesame diameter as the valve casing, foi; the` pressure of' the gases in the c vlinders will press their outlet sides against the correspondingpoiztions of the valve casing, and thus make a tight joint at their outlet -sidesl floating. Taking the frctional resistance of a disk as 100. that ot' a -round shaft-as'O,

and that .ofa sphereas 30, when-two `niotions at` right angles to each other are addspherical valve,v as in the present ease` the frietional resistance will he 50"; less thanthat of its original 4 single motion. This `then results in. arv fricl 1 tional resistance of about 15%7 which is be? lieved to be the least possible. i The ports have no more chance of leaking than a puppet valve or an)1 other type of valve; due to the tact that they are splieri a perfect and selfground seat. ehanieal valve across and iliider the near side ot' the valve caused b v the pressure, either from within or from without, is elinii-v nated in this case b v the provision ot' spheriral end walls and b v the fact that the 11'0- splieriral' valve is divided .into three parts so separated thal the ends. by a slight spring pressure, are t'oreed tothe spherieall end walls ot' the casingfand sopreventthe leaka`ge which has been so commonin all other meiil' ehaliieal valves. llt is obvious from the construction that 1 the valve is t'ree to expand in :ill directions. Him-e the inner and outer surtaees of the parked with asbestos or any 1:20l otl'ier iion-conductor, the heatgot' the we'ar ing surfaces is greatly reduced.

Since each valve is iiu'lependentlyflexible, warping or strains due to -reheating cannot be effective in this full floating valve ineeha- Since the oiling' is 'accomplished by pi'oviding oil pits at lthe ends hf each valve, the valve stems and the flexible universal joints are operating within a bath, of ioil.

ngiaaae By the provision of an oil hole leading tov the {space-between the full floating 'port member and the expansion vend members, oil is thrown from this space by centrifugal force to the outer walls around the central port member, and is regulated by a pressure sufficient to maintain a 'film oi'poi, While preventing flooding. And in view of the fact that the frictional lresistance has been reduced to the least possible, the oiling becomes of much less consideration. As the frictional resistance decreases, the amount of oil naturally decreases in direct proportion.

, Practical experience proves thatall rotary movements cause even wear, regardless of Whether or not the ressure may be exerted at one or more designated points throughout its cycle of rotation. This is illustrated by the case of a cross head pin and a crank Vpin of a reciprocating'engine. The cross head pin, due to its reciprocating motion, wears unevenly directly in line with the pressures exerted, andA it therefore becomes necessary in the course of time to file the pin at the top and bottom, or at right an gles to the pressure exerted, as this pin eventually becomes oblong. The crank pin, due to its rotary motion, maintains throughout the life of the engine its rounded condi-- f tion, regardless of'the fact that the pressures exerted are not uniform.

,Undoubtedly a sphere 'rotating Within a lcasing, and 'with a slight oscillation, will maintain its true spherical shape and be self-grinding throughout the life of any gas engine in which it is used, as, by reason of their larger diameters and higher speeds' and greater heat in the piston, the piston and crank shafts are more subject to short lifethan the valve Vof small diameter and lr speed slower than that of the crank shaft in the proportion of 1 to 4.

I claim z- 1. In combination with a globular casing,

a rotary valve comprisliig a 'central section having'a port therethrough, and a terminal section operatively connected to rotate-together, the central section bein approxiL mately in the' form of a sphere rom 'which a segment has been cut ofi at opposite sides4 andv the terminal section being in theforrn of said segment, and means for pressing the terminal section from the central section.

2, In combination witha globular casing, a rotary valve comprising acentral section having a port therethrough, and a terminal section operatively connected to rotate together, the central section bein approximately in the form of a sphere rom which Aa segment hasbeen cut oil at opposite sides and the terminal section being in the form ofsaid se ment,`andV compressed springs interposed'` etween the central and terminal `mately in the form of a s here i a segment hasbeen cut o at opposite sldes 130 from the centralsectlon..

3. In combination with a globular casing,

a rotary valve comprising av central section having a port therethrough, Aanda terminal section operati'yely connected to.rotate to-f" gether, the, central sectiombein approximately in the Aforni of a sphere om which a segment has been cut off atopposite sides and the terminal section being in the form of said segment, means for pressing the terminal section from the central section, the terminal section having an extension with a rounded head, a loose joint for connecting said head. with avrotary device to impart rotary motion to the terminal section, and means whjerebythe rotation of the termina-l section rotates the main section.

4. In combination with a globular casing, a rotary valve comprising a central section having a port therethrough, and a terminal section-operatively connected to rotate together, the central section bein approximately inthe form of a sphere om which a segment has been cutl olf at opposite sides and the terminal section-'being in the form of said segment, means lfor pressing the terminal section from the central section, the terminal section having an extension with a rounded head,` a loose` joint for connecting said head with a rotary device to impart rotary motion to the terminal section, the Y faces of saidterminal and the main section having registering grooves, and a key in said grooves. v

5. In combination with a globular casing, a rotary valve comprising a 4central section having a port therethrough, and a terminalI 'terminal section having an extension with a rounded' head, 'a loose joint for connecting said heiid with a rotary device to impart rotary motion to the terminal section, the faceshf. said terminal 'and the mainsection having registering grooves, and a key in` said grooves, said terminal sections having a recessl openin from its face'opposite to the central sectlon, a compressed'spring in said recess, the terminal'andmain sections havin registering grooves, a key in said grooves, said spring pressing against said ke g. In combination with a globular casing, a rota'ry valve comprising a central section having a port therethrough,.and a terminal section operatively connected to rotate together, t e. central section bem approxiom which ancl the terminal section being in the -form section having registering grooves, and a of ,said segment, means for pressing the key in said grooves, said terminal sections-rr vterminal section from the central section, `having an etension with a rounded head, a. the termin section having an extension' -tube arou'nd said head havin slots openwith` a roun ed 'head a loose joint for con; ing in its end adjacent to sai central secnectng said.' head wlth a rotary device to tion, and a pin throu h said'rounded head impart rotary motion tothe terminal sechaving its ends in sai slots.

tion, the faces of said terminal and the main ALBERT MOGRHEAD.