US1385027A - Engine - Google Patents

Description

P. VAN VLECK AND H. COOPER.

ENGINE.

' APPLICATION FILED MAY 22,1920.

Patented July 19, 1921.

@mw awl Tlhlflhll't PEIRCE VAN VLECK AND HOWARD GOQPER, OF BALTIMYQRE, IMARYLAND, ASSIGNORS TQWILLIAIM H. PEIRCE, OF BALTIMORE, MARYLAND. I if ENGINE.

Application filed May 22,

To all whom it may concern:

Be it known that we, Pninon 'vAN VLEGK and HowARoCoornR, citizens of the United States, residing at Baltimore city, in the State of Maryland, have invented certain new and useful Improvements in Engines, of which the following is a specification.

This invention relates to engines and more particularly to a double acting single expansion type.

The objects of the invention are: First, to construct an engine of the general class indicated in which all valve gear is eliminated and the valve distributing the fluid pressure on either side of the piston is actuated by the same fluid reciprocating the piston. Second, to construct and arrange the valve distributing the fluid pressure with respect to the chest and its relation to the cylinder, so that no stuffing boxes or glands are necessary for the elements connecting or controlling said valve with the movements of the piston' Third, to construct and arrange ports in the distributing valve and the chest in which said valve reciprocates and oscillates, so thatthe motive fluid reciprocating the valve is efliciently and positively controlled, thereby insuring the constant and uniform operation of the motor or engine. Fourth, to so construct and arrange the cylinder, chest, valve with their cooperating ports and the con nection of the reciprocating piston with the valve, whereby the engine can be cheaply manufactured and all the parts are readily accessible, easily assembled or taken apart and inspected or repaired with a minimum of cost and time. p

Fifth, other advantages and objects of the invention will appear from the detailed description of the construction and operation of the invention to be hereinafter given.

The invention consists of structural characteristics and relative arrangement of elements which will be hereinafter more fully 1 described and particularly pointed out in the appended claims.

' In the drawings, in which similar reference characters indicate the same parts in the several figures,

- Figure 1, is a longitudinal section partly in elevation of the motor 5- Fig. 2 is a fragmentary section on line 11-11 of Fig. 1; y

Fig.8, is a similar section on line III-Ill of Fig. 1; v

Specification of Letters Patent.

Patented July19, 1921.

1920. Serial no. 383,482.

Referring to the drawings, 10 is the cylinder having adoubleacting piston 11 con. nected to a tubular piston rod 12 passing through a stuffing box 13 in the head 14. Said piston rod 12 maybe connected to any suit-" able pump, compressor, or other mechanical expedient, not'shown, and forming no part of the present invention, to which the power of the motor is to be applied. The head15 of the cylinder is so cored and constructed as to form a chest 16 in which is provided a combined oscillatory and reciprocatory distribution piston valve 17 having end cylindrical sections 18 and 19 and a central cylindrical section 20, said chest 16 being provided with the usual liner 21, and heads, 22 and 23 secured in any well known man-' ner and forming no part of the present ing vention. In the head 15 are cored a series of ports 24, 25, 26, 27 and 28 which communica'te with properly spaced and =arranged openings through the liner 21, into the chest 16, as indicated, saidport 24 having opening29, port 25, opening 30, "port 26 openings 31, 3l,32 and 33, central port 27 opening 34, and upper port 28 openings 85, 36 and 37. The other ends or openings of the ports 24, 25 and 26 are in communication with the ports 88, '39 and 40 cast in.

the cylinder 10, as shown for purposes to be presently described. The cylindrical section 18 ofthe distribution valve 17 'is' provided with two short longitudinal ports 41 and 42 which are adapted to connect one end of the chest 16 with theopenings 35 and 31 of the ports 28 and'26 respectively, while the ports43 and 44 in the othercylindrical section 19 of the valve 17 connect the other end of the chest'16, respectively with the openin'gs37 and 33 communicating with the ports 28 and 26, aswill be readilyseen from the drawings. Passing through the cylin drical section 19 of the valve 17 with a tight fitis a pin 45, one end of which is suitably threaded at46, as shown, while its other end is adapted to be firmly seated in a socket 47 formed in the central cylindrical section 20 ofthe valve 17, said pin 45 being slidably andloosely connected to the upper end of a rod 48 passing with considerable clearance through the port 27 as shown. The other end of the rod 48 is adapted to pass withinthe hollow section of the piston rod 12 and its lower end 49 and enlarged upper end are engaged by the under and upper sides respectively, of the tappet plate 50 secured to the upper side of the piston 11 during the reciprocation of said piston 11 and its rod 12, for'the purpose or oscillating the valve 17 and thereby properly ad mitting'the live motive fluid toreither end of the chest or exhaust theentrapped fluid therefrom to reciprocate said valve 17 tor v purposes to be presently explained.

The operation of the invention is as fol lows:

The 1 parts being i in the. position. shown 1 infFig. l", the, live motor fluid enters the port 38=and passes through opening 29 into chest 16 and through opening34 =and port 27 around valve rod 48 into the cylinder 1-0 and forcesthepiston 11 in a downward direcs tion'as indicated by the arrow, and the expanded motive fluid on the other side of the piston passes through ports 39, 25,openings 30and 31, ports 26 and 40, not shown, or atmosphere. As said piston 11, approaches the end of its downward stroke, the tappet plate engages the; en-

-larged end 49 of the valve. rod 48 and partially zrotates the valve 17 so that the port,41

in the cylindrical section 18 registers with the opening 35 of the port 28 and, shuts off theport 42 with opening 31 of port 26 and eXhaustl port 40, and port 43 of sectionl9 is cut ea from opening37and port 28 and port 44. is incommunication with open ng 33. and ports 26 'and40,--the reby enabling theentrap'pedmotive fluid to escape to the he valve being in this thrown and last described position, the live fluid 1 pressure is enabled to take'the course through the ports 38,524, opening 29 into chest 16, opening 30,=

' ports 25 and 39,7into the cylinden-to-force the piston 11 upwardly or return stroke, and

the motive fluidfon'theupper side of piston and within the cylinder 10 passes out by way of port 27, opening 34, chest 16, opening 32, ports 26 and 40 tothe atmosphere. The piston 11.0n reaching the end of this stroke, thelower end of the hollow section of the rod 12 engages the enlarged end 49 ofthe valve rod 48 or upper side of tappet plate 50 engages the lower end of the upper enlarged portion of 'valverod 48 and partially and reversely rotatesthe valve 17 into the position'shown in Fig. 2, so that the port 41 is, cut ofl :from communication with opening 35. and port 28, port 42 communicates with opening 31, and port 43 is in communica tion'with opening 37 and port 28 and port.

to a condenser,

44 is cut off from opening 33 and port 26. In thisposition of the valve 17,'the live moturned to the position shown in Fig. 1, and

the 'cycle of'operation just described is repeated. a

It will be seen that owing to the short length ofthe ports 42 and 44, the openings 31 and 33 are cutoff sufliciently early to -efitect a cushioning of the endwise travel or reciprocation of the valve-17, and the cushioningofthe piston 11 is 'eflected by pro 'viding' that the movement of the valve 17 tive fluid passes through ports '38 and 24,-. :openings 29- and36, port 28, opening 87, port 43, into'the chest back of section 19 and the 'motive fluid back of section 18 escapes to the 'atmosphereby way of port 42, opening 31 and ports 26 and 40, when the valve 17 is 're besuch asto reverse oradmit livemotive' fluid pressure in the cylinder 10..just'-be foresaid piston 10 reaches the end ofitsstroke. The valve 17 may also be so arranged to be completely balanced so far as "circum'feren- V tial pressures are concerned by arranging the ports in said valve in equal and .opposite pairs and :sodisposed, to communicate; with the ports and openings in thecyli nder and chest, thereby equalizing the pressure valve and insuringit to positively reciprocate under all -condition's or service, i 91 From the foregoing disclosure of the construction, arrangement, assembling and at all times on theoppositesurfaces of the mode of operation o'fthe motor itsvill be.

seen" that all the objectsand advantages are citedin the statement of invention are :fully and efiiciently carried out a-nd while one embodiment of such an arrangement is herein illustrated and described, it will be readily seen that many changes will readilysuggest.

themselves to any one skilled in the art-without departing from the structural characteristies and relative arrangement -ofele-.

merits coveredby the claims.

fWhat we claimis:

. 1. A 'non-rotative motor comprising. aicylinder, a piston reclprocatlng within said cylinder, combinedlive fluid and exhaust ports leading to. oppositeends io'f the "cylinder, a live fluid pressure port and san exhaust-portya chest at one endiofthe cy lim.

der and having a'series of openings 00mmunicating with-the live pressure andxen haustv port and ports'leadingto the opposite ends of the cylinder, afcombined oscillating and fluid actuated*reciprocatingdis-i tributing valve within said chestiand-having ports so constructed and-arranged to co operate with said series of openings-com- -municating with the live fluidijpressure 'ekhaust ports and ports leading'to-the oppo site ends of the cylinder to admit live fluid pressure on opposite sides of the piston-to;

reciprocate said piston and exhaustx said fluid from the cylinder and admit liveffiuid pressure within the chest and on each end of the distributing valve and exhaust said fluid. from the chest, and a single valve rod whose axis is eccentrically arranged with respect to the axis of the valve and actuated by the reciprocation of the piston and freely passing through the port leading into the cylinder at the end nearest to the chest for oscillating said reciprocating distribution valve and without in any way obstructing the passage of the live fluid into or exhaust of expanded fluid from the cylinder.

2. A non-rotative motor comprising a cylinder, a piston reciprocating within said cylinder, combined live fluid and exhaust ports leading to opposite ends of the cylinder, a live fluid pressure port and an exhaust port, a chest at one end of the cylinder and having a series of openings communicating with the live pressure and exhaust ports and ports leading to the opposite ends of the cylinder, a combined oscillatin and fluid actuated reciprocating distributing valve within said chest and having ports so constructed and arranged to cooperate with said series and exhaust ports and ports leading to the opposite ends of the cylinder to admit live fluid pressure on opposite sides of the piston to reciprocate said piston and exhaust said fluid from the cylinder and admit live fluid pressure within the chest and on each end of the distributing valve and exhaust said fluid from the chest, a pin attached to the valve and arranged parallel to and to one side of the longitudinal axis of said valve, and a valve rod having one of its ends slidingly connected to said pin and freely passing through the port leading into the cylinder at the end nearest to the chest and intermittently actuated by the reciprocation of the piston without obstructing the admission of live fluid into or exhaust or expanded fluid from the cylinder.

In testimony whereof we aflix our signatures.

PEIRGE VAN VLECK. HOWARD COOPER.

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