US1465428A - Valve mechanism for explosive engines - Google Patents

Description

Aug. 21, 1923. 11,465,428

7 M. L. GALLAGHER ET AL Patented Aug. 21, 1923.

iditf ifhifi LdtSstZ-S FATEWT @Fii- MICHAEL L. GALLAGHEP.,AND SIGURD BROCKSON, OF HANKINSON, NORTH DAKOTA.

VALVE MECHANISM FOR EXPLOSIVE ENGINES.

Application filed March 28, 1921. Serial No. 456,184.

To all whom it may concern Be it known that we, MICHAEL L. GAL- LAGHER, and S enna BRooKsoN, .citizens of the United States, residing at 'Hankinson,

in the county of Richland and State of North Dakota, have invented certain new and useful Improvements in Valve Mecha- ..nism for Explosive Engines; and we do hereby declare the followingto be a full, clear, and exact description of the nvention, such as will enable others skilled in theart to whichit appertains to make and use the same. i

This invention relates to a valve mechanism for an explosive or internal combustion engine.

It'is an object of thisinvention to provide a valve mechanism in which one springpressed valve of; the customary type is provided for each cylinder, and this valve is moved to'open position by...me'chanism operated hour a cam shaft,"..which shaft is driven in fixed relation to,the engine or crank shaft.

It is a further object ofthe invention to so construct the cam shaft that the same .will form a double valve,r which in cooperation with the bearing 01' casing in which it is enclosed, will co -operate with the cylinder valve to admit and exhaust gas, from the cylinder and close the valve passages at the desired times.

These and other objects and advantages of the invention will be clear from the following description made in connection with the accompanying drawings in which like reference characters refer to the same parts throughout the different views, and in which Fig. 1 represents a section through the cylinder head and the valve disposed there- 1n;

Fig. 2 is a section of the valve casing taken substantially on the line 22 of Fig. 1;

Fig. 3 is a view in side elevation of the crank shaft casing as seen from the right of Fig. 1;

Figs. at to 7 represent sections taken through the line 4% of Fig. 2 looking in the direction of the arrows and showing the cam shaft valve in various positions.

Referring to the drawings,the top of the cylinder 1 is illustrated forming the cylinder of an ordinary internal combustion engine. The usual passages 2 for a cool ing fluid are shown as well as the threaded opening 3 in the cylinder designed for the admission of a spark plug. The cylinder is bored and threaded through its central upper portion to form an opening for receiving the valve frame or casing & which is shown as screwed therein and which is provided at its lower end with the usual conical valve seat on which the valve 5 is designed to seat. The valve 5 is provided with the usual stem extending through the valve frame and through a plug 6 shown at the upper end of the cylinder, and the stem is provided with a pinned collar 7 thereon between which and the plug 6 a compression spring 8 is disposed, which spring tends to normally hold the valve seated. A fulcrum bracket 9 is boltedor otherwise suit ably secured to the top of the cylinder and is. arranged to receive the pivot pin of a double-ended lever 10, one end of which is arranged to overlie the stem of the valve 5 and the other end of which overlies a stem 11 extending through an apertured boss on the top of the cylinder and into contact with the cam surface 12 on the cam shaft 13. The valve chamber, at the'top of the cylinder, as shownin Fig. 1, extends to one. side thereof and is bored to receive the cam shaft 18. The passage 1 through the valve chamber which extends between the depending boss 1 and an upstanding block or boss 1 is closed by the cam shaft 13. This shaft is provided with two segmental grooves 14 and 15 arcuate in cross section and which extend across the same in spaced relation and approximately ninety degrees apart circumferentially. Between these grooves 14: and 15, the cam groove 12 is formed.

From this description it is seen that as the cam shaft 13 revolves the passage 1 will be closed except when one of the grooves 14- or 15 is passing thereacross. The valve 5 will be closed except when the portion of the shaft 13 between the ends of the groove 12 is passing under the pin 11.

The cam shaft 13 will be driven from the crank shaft of the engine and will rotate at one-half the speed thereof. The valve 5 is adapted to be closed during the compres sion and firing and to be opened for intake and exhaust. In Fig. 4:, the shaft 13 is shown with the groove 15 just coming into alinement to open the passage 1 for exhaust and at this time the pin 11 is just thus allowing valve riding up on the high part of the cam groove. or shaft to open the valve 5. In Fig. 5, the groove 15 is shown as just closing the exhaust passage and the groove 1d has just opened the intake passage, the pin 11 being on the high part of the cam and holding the valve open. In Fig. 6, the shaft is shown in position with the groove 14 just closing the intake and the pin 11 is just riding onto the low part of thecam groove to close. The compression and firing will take place during the next 180 degree turn of the camshaft stroke thereof.

until the groove 15 reaches the position shown in Fig. l, to again open the exhaust. 1n Fig. 7, the shaft 13 is shown at the end of the compression stroke of the engine,

or just at the beginning of the firing The va1ve5 at this time being closed. It is thus seen that the grooves 14: and 15 in the cam shaft form intake. and exhaust valves WlllCll co-operate with the valve 5. It will, of course be understood that the opening 17 in Fig. 3 will be connected to the intake manifold and the opening 16 in Fig. 3 will be c'onnectedto the haust manifold.

From the above description it is seen that applicants have provided a very simple,

compact and efficient valve mechanism-and one that comprises few parts andis, accurate in its movements. But one" valve is needed by the cylinder and thus considerable operating mechanism'is dispensed with.

It will, of course, be understood'that various changes may be made in' the form, de-

ta'ils'and arrangement of the parts without departing from the scope of applicants invention, which consists in the matter shown 40 and described and set forth in the appended 5 claims.

hat is claimed is: 15A valve structure for an internal combustion engine comprising, a cylinder having a valveopening thereinto, a single re ciprocating puppet valve for opening and closing said opening, a valve chamber with which said opening communicates having parallel passages leading thereinto, a shaft traversing said passages having segmental groovestherein adapted to successively close and open passages, said shaft also having a cam groove disposed circumferentially substantially between .Sitld grooves, and

.means engaging said camgroove for operating said puppet valve.

2. A valve structure for an internal combustion engine comprising, a cylindenhav-i ing a single valve opening thereinto, a singlereciprocatingpuppet valve for controlling said opening, said valve having astem projecting therefrom, ,a spring disposed about said stem normally holding said valve in closedposition, a valve chamber ,with

which said opening communicates having laterally extending parallel passages, ashaft traversing said passages having. segmental grooves thereln disposed .circumferentially;

substantially ninety degrees apart, and adapt- MICHAEL L. GALLAGHER. SIGURDBROCKSON.

Witnesses:

.Gno. XV. RENNIX, Ma'r'r SCI-IRAM.

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