US1596330A - Driving mechanism for rotary valves - Google Patents

Description

Aug.17,1926. 1,25%,330v

' R. F. BARKER I DRIVING MECHANISM FOR ROTARY VALVES Original Filed 5, 1925 2 Sheets-Sheet 1 Aug." 17 1926. R. F. BARKER DRIVING MECHANISM FOR ROTARY VALVES Original Filed 5 '1925 2 Sheets-Sheet 2 Patented Aug. 17, 192%.

REUBEN r. BARKER, 0F PORTLAND, onneon.

' n'aivrns MECHANISM FOR Roinnir VALVES.

Original application iiIedF-ebruaryTS, 1925, Serial No. 7 654. Divided and this application filed 1925. Serial N0. 43,290.

My invention relates to internal combustion engines andl has particularly to do with the valve mechanism thereof.

One of the particular objects of -my invention is to improve further the rotary valve for explosive engines patented my-- self January 1, 1918, Patent No. 1,251,953. This application has been divided out of my co-pending application entitled Rotary valve ,for. internal combustion engines which was filed February 5th, 1925, receiving Serial No. 7054:. I I

One of the main improvements of my presentinvention which I have embodied in. this divisionalapplication is to provide each cylinder, with, an independent rotary valve preferably of substantial cross sec tional area, each ofsaid valves being driven by a gear connection to a common drive shaft. I I

The main object of my present invention is to provide connecting devices between said driving mechanism for eachof the independent valves and the common driving element whereby the valveoperations of all the cylinders can be driven in time with each other and can be readily advanced or retarded in unison relatively to the motionof the crank shaft. To this end said valve operating devices preferably consist of .a driving shaft provided with worm and worm gears of'the type knownas spiral gears in which the worm gear is substantiallyflat-faced. Said worm gears are mounted on each of the valve operating mechanism and the worms are fixed to said driving shaft and thus by shifting said common driving shaft longitudinally, the timing of all the valves will be advanced or retarded to an equal degree, due to the lead of the thread-like, or helical, teeth on said worm.

A further object of my present invention is to provide gear connections of this character which are adapted to be mounted upon anti-friction supports so as to minimize the power lost through said power transmission elements.

The further details of construction and mode of operation of my invention are hereinafter described with reference to the accompanying drawings.

In said drawings: Fig. 1 is a plan section taken through th alined rotary valves of my improved engine July 1 3,

and diametrically through thejworm gears carried thereby;

Fig. 2 is a horizontals'ection taken on the line 2-2 of Fig. 1 through said worin gears showing the common driving shaft .and the worms carried thereby; and I v Fig. 3 is a larger scaled section taken on the line 3-3 ofFig. "1, said section being taken longitudinally through one of said valves and transverselythrough the common driving shaft and one worm carried 7 thereby.

My invention is show n aseinbodied in a inu'lti-cylinder engine of the four-cycle type. Said engine comprises cylinders 1 .in which the pistons 2 reciprocate. Separate valves 3*, 3", 3 andfi respectively, control :the admission and emission of the gases menu from said cylinders .1, through the Icylindric al ports 4 in said cylinders. v

All of,:said valves 3%,33 3 ancl ;8'ai'e structurally the same and thus I will describe in detail. merely one of said valves and will refer, with similar reference characters, ;to the corresponding parts in the other of said valves. Each of said valves is journaled in a bore. in said engine. which communicates with the working barrels of its respective cylindei through its cylinder ports, As is shown in .Figs. 1 andfl, said valves in line: and a lay side by side, transversely of the cylinders. v

Each of saidyalves 3 3?, 3? and S car-ries a worm gear of the typelrnown as a spiral gear, numbered respectively, 5% 5 5 and "5?. Said worm gears drive said valvesthr-ough Oldhani couplings 6 6 6 and 6, respectively. Each of said worm. gears is carried upon a roller bearing 7, 7 7, or 7 Said rollerbearings are mounted upon hollow trunnions 8, 8 8 and 8 which are integral with and extend laterally from the housing 9, which constitutes a covering for said couplings, bearings, wormgears, and for the common drive shaft 10, which carries the Worms 10, 10 10 and 10 which mesh with and drive the worm gears 5 5 5 and 5 respectively, said housing being shown in section in Fig. 3. The tubular water conduits 11 from each of said valves are also journaled in said housings, packing 12 being arranged at both sides of the radial outlets 13 therein, as shown in Fig. 3. Said housing carries the cooling fluid manifold 1 1, as shown in Fig. 3. Said manifold has an outlet 1 1-", which communicates with the radial outlets 13 which extend through said tubular conduit 11 through a passageway 14.

Within said tubular conduit 11 is a smaller sized conduit 15 which has 'aflange 15 at its outer extremity, which completely fills the bore of the tubular conduit 11. The bore of said smaller tubular conduit 15 extends completely therethrough and forms a passageway for the cooling fluid which is completely separated from the passageway formed by the periphery of the smaller conduit 15. The inlet 14 communicates with the bore in said smaller sized conduit 15 through a passageway 1 1 The inlet and outlet 14a and 1 1- in the cooling fluid manifold are located at a point above the major part of the valve so that a substantial amount of cooling fluid will be entrapped within the valve so that if the supply of cooling fluid should become depleted, the cooling fluid thus entrapped would be sufficient to substantially cover the exposed portions of the valve.

The connecting passageways 1s and 14 which connect said apertures A and 14- with the respective outlet and inlet ends of the cooling fluid passageway, are arranged vertically and constitute stand pipes adapted to prevent the displacement of the cooling fluid as previously referred to.

Each of said valves comprise a cylindrical body which is provided with a passageway 17 for the incoming gases, a passageway 18 for the exhaust gases, and a continuous passageway 19 adjacent said gas passageways for the cooling fluid. The arrangement of the passageways in this manner permits the heat of the exhaust gases to be removed in part so as to prevent said excessive heat from binding said valves in their seats, due to distortion.

1 provide a means for timing all of said valves uniformly by threading the end-caps 20 and 21, in which the ends of the common driving shaft 10 is journaled. Said shaft 10 is driven by the chain 22 mounted upon the sprocket 23, keyed to said shaft 10, shown in Fig. 2, and it is to be understood that said chain 22 is connected to the crank shaft for said engine, in the common manner, so that said valve can be maintained in synchronism with said shaft.

By providing intermeshing worms and worm gears, carried in part by said shaft and in part by said valves 3 3 3 and 3, I am able to advance or retard the timing of said valves uniformly by adjusting said shaft 10 longitudinally. Each one of said end caps 20 or 21 may be backed off slightly and the other cap tightened correspondingly to produce this change in timing by causing the shaft 10 to be adjusted longitudinally. Due to the lead in the teeth of the worm, this will cause the worm gears to be givena partial rotation and said valves being connected with the crankshaft, will thus be advanced or retarded relatively thereto, by said adjustment.

I claim:

1. In an internal combustion engine, a series of cylinders, and a valve for each cylinder, valve operating mechanism for each valve, and common actuating means for said valve operating mechanism, a drive shaft, spiral gear wheels included in said valve actuating means in part carried by said shaft, the latter shaft being mounted in'longitudinally adjustable end caps adapted thereby to advance and retard the valve operations relatively to the position of the engines crank shaft.

2. In an internal combustion engine, a cylinder, a rotary valve mounted in the head thereof, a spiral gear connected to said rotary valve, a driving spiral Worm meshing with said spiral gear, said Worm being mounted in longitudinally adjustable end caps adapted thereby to advance or retard the relative timing of the valve'operations.

REUBEN F. BARKER.

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