US1404583A

US1404583A - Rotary engine

Info

Publication number: US1404583A
Application number: US424264A
Authority: US
Inventors: George F Coffelt
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-11-15
Filing date: 1920-11-15
Publication date: 1922-01-24
Anticipated expiration: 1939-01-24

Description

G. F. COFFELT.

ROTARY ENGINE.

APPLICATION FILED Nov.15, I920.

1 ,404,583 Patented Jan. 24, 1922.

2 SHtE|'$SHEET I. F 9

ES ATTORNEY G. F. COFFELT.

ROTARY ENGINE.

APPLICATION FILED NOV. I5. 1920.

1,404,583, Patented Jan. 24, 1922.

2 SHEETSSHEET 2.

6'. Foff'eZt.

UNITED STATES PATENT OFFICE.

none: 1'. com, or narrow, omo.

' norm! manta Specification or Letterlhtent. P t t d Jan. 24,

Application fled Iovenbor 18, 1980. mm Io. 484,804.

To the attainmentof the foregoing, the

invention consists in' the improvement as hereinafter described and definitely claimed.

In the accompanying drawings, forming part hereof Figure 1 is a view showing my novel engine or apparatus in side elevation.

Figure 2 is a plan view illustrative of the lower section of the piston cylinder and the piston therein.

Figure 3 is an inverted plan of the upper section of the piston cylinder.

Figure 4 is a view partly in side elevation and partlydn vertical section, the section being taken in a plane parallel to Figure 1. c

Figure 5 is a detail section illustrating the means for automatically controlling the suppl of fluid under pressure to the cylinder.

igure 6 is an enlarged detail section SllOWlllg one of the relief valves of the rectilinearly movable piston blade.

Figure .7 is an enlar ed brokenview in.

plan showing a part 0 the means to control the supply of fluid under pressure to the cylinder. Y

Figure 8 is a detail enlarged view of the air compressing means comprised in the improvement.

tion is ofinternal combustion t Similar numerals of reference designate corresponding parts in all of the views fif the drawings.

The illustrated embodiment of my invenamong otherelements the said em diment comprises a lower cylinder section 1 and an upper cylinder section 2, the latter being interiorly channeled as indicated by 3 to afford an explosion chamber that is traversed by the extended portion of the rectilinearly movable blade 4 of the rotary piston 5. The rotation of the piston 5 in conjunction with the cylinder controls the rectilinear move-' andments of the blade 4, and it will be observed by comparison of Fi res 4 and 6 that each .end portion of the b ade 4 is provided with what I designate a relief valve 6. The said -.relief valves 6 are provided in order to facilitate starting of theerigine, and it will be readily understood in this connectionthat if a vacuum is created in the explosion chamber 3 back of the extended portion of the blade 4 when the engine-is idle, the said vacuum. will be broken by the opening of the uppermost valve 6 at the initial movecated by arrow in Figure 4. Interiorly the piston cylinder is provided with a cam portion 7 for coo eration with'the beveled ends 8 of the bla e 4, and at 9 the cylinder is provided with an exhaust conduit in communication with they atmosphere. It will also be understood 'by comparison of Fig ures 2, 4 and 5 that the piston 5 is provided with peripheral recesses 10.

Appropriately connected with and supported by the piston cylinder is a cylinder 11, Figures 1, 4, 5 and 7 in which is a piston valve 12 for controlling the supply of fluid cylinder of the piston 5 and is controlled by t c said piston 5. In other words when the stem 13 is opposed to the unreces'sed portions of the piston 5, the valve 12 will be in its outermost positionwhile when the stem 13 is opposed to one of the recesses 10 the sprin 14 at the right of the piston valve 12 w1 be enabled to force the said piston valve 12 toward the left; The apertures 15 at the right hand end of the cylinder 11 are 4 ment of the piston' in the direction indiunder pressure to the cylinder of the work mg plston. The said piston valve 12 is pro-' vi ed with a stem 13 that extends into the merely vents to prevent a cushion of airv I from interfering with movement of the piston valve 12 toward the right. The said piston valve 12 is characterized by a transverse port orchambe'r 16, and it will also be observed that a conduit 17 leads from one side of the cylinder; 11 to the cylinder of the working piston'5 at the point 18 in Figure 4. Connected. to one side of the cylinder 11 is a ipe 19' adapted to lead from a source of 'gaso ene or other hydrocarbon fuel suppl and provided with-a re lating valve 20. A so leading-from said si e of the cylinder 11 and arranged V in transverse alinement with the mouth of the conduit 17 is a pipe 21, Figures 1, 4 and 7. The said pipe 21 extends laterally from the cylinder 11 and then upwardly, and at its end remote from thecylinder 11 said pipe 21 is connected with a compressed air tank 22, Fi res 1 and 4. Connected at 23 with the interior of the cylinder of the workin piston 5 is a pipe 24, Figures 4 and 8, w 1ch leads to one end of a pump cylinder 25 in which is a piston 26 that is movableby the expanding mixture toward the left in Figure 8 against the action of a spring 26 also contained in the cylinder 25. The expanding products of combustion act of course a alnst the piston 26 to move the same towar the left in Figure 8. When the piston 26 is movedtbward the right in Figure 8 it serves to draw atmospheric air into the cylinder 25 past the inwardly o ening non-return valve 27, and whenthe plston 26 is moved toward the left in Figure 8 it serves to compress such air and to force thesame past the non-return valve 28 and through theconduit 29 into the storage tank 22.

Any appropriate ignition means may be employed, though I prefer to use a spark plug 30 and to control the creation of sparks by the ordinary well known means associated with the working piston 5.

In the practical operation of the embodiment illustrated and described it will be manifest that when the iston valve 12 is in the position shown in Figure 7 hydrocarbon fuel will be received in' the chamber 16. When one of the piston recesses 10 is presented to the stem 13, the spring 14 will move the piston .12 and interpose' the chamber 16 and the fuel charge therein between the pipe 21 and the conduit 17 whereupon a head of fluid under pressure will sweep way will replenish the supply of compressedair in the tank 22. After the extended portion of the piston 4 passes the exhaust port or conduit 9, the spring 26 will operate to move the piston 26 toward the right in Figure 8 with the result that atmospheric a1r will be drawn into the cylinder 25, ready to be forced into the tank 22 on the subsequent I movement of the piston 26 toward the left in 1 In testimony Figure 8. The operation described will continue so long as hydrocarbon fuel is supplied through the pipe 19, and when'the sup ply of hydrocarbon fuel is cut ofi. the engine will come to a stop.

It will be apparent from the fore oing that my novel engine is capable of re iable operation, the cam 7 in cooperation with the beveled ends 8 of the piston blade 4 serving to correctly position the said blade 4 at each time when one end of the blade is in a posi-. tion in front of the explosive mixture supply port 18, with reference to the direction of rotation of the working piston 5. It will also be apparent that the engine is simple, and that all of its parts are well adapted to withstand the usage to which apparatus of corresponding character is ordinarily subjected.

While designed primarily as an internal combustion engine, it is to be understood that some of the features of my novel engine may be used to advantage. in a steam engine.

Having described my invention, what I claim and desire to secure-by Letters-Patent, 1s v v 1. The combination of a rotar internal combustion engine comprising a cy inder and a rotary piston with peripheral recesses, disposed in said cylinder, a piston valve having 'a stem extending into the cylinder and opposed to the periphery of the piston and adapted to cooperate with the piston recesses,

said piston valve also having a transverse" port, a casing containing said valve, a pipe leading from the valve casing and adapted to be connected with a source of fluid-pressure supply, a pipe connecting said valve casing and the cylinder, the induction end of said pipe being arranged opposite the end of the fluid-pressure supplv pipe, a valved fuel supply pipe leading to the valve casing and arranged outwardly beyond the fluidpressure supply pipe, and a spring inter posed between the outer endof the piston valve and an abutment in the outer'portien of the valve casing and adapted when one of the piston recesses is opposed to the valve stem to press the piston valve inwardly.

2. In a rotary engine, the combination of a cylinder haying induction and. exhaust ports and an internal cam portion adjacent to the exhaust port, a rotary piston in said cylinder, a blade carried by and movable rectilinearly in the piston and beyond the periphery thereof and relief valves in the end portions of the blade and movable with the blade into and out of the rotary piston. whereof I afiix my si ature.

GEORGE moor ELT.