US2249576A - By-pass thermostat valve mechanism - Google Patents

Description

July 15, 1941. L. M.'PAYNE BY-PASS THERMO STAT VALVE MECHANISM a in Filed Aug. 13, 1938 m r rr I N INVENTOR. LAMBERT M. PAYNE M 4VW4%7 ATTORNEYS closed position.

Patented July 15, 1941 UNITED STATES PATENT orrlc's BY-PASS THEBMOSTAT VALVE MECHANISM I Lambert M. Payne, Detroit, Mich. Application August 13, 1938, Serial No. 224,80 7

3 Claims. v (Cl. 236-34) This invention relates to thermostatic valve mechanisms of the by-pass types such as are parts shown in the drawing hereof, wherein Fig. 1 represents a vertical medial sectional view through my improved thermostatic valve device,

as it appears installedon the head of an internal combustion engine and with the by-pass valves in open position; and Fig. 2 a sectional view taken on the line .2-2 of Fig. 1, showing the bellows in elevation and the by-pass valvesin One of the thermostatic valves of the type shown and described herein comprises a casing having a cylindrical skirt provided with openings in the wall thereof for the circulation of water through the-by-pass circuit, with valve members carried by the. top of the bellows and adapted to slide in contact with said skirt as the bellows expands and contracts, thereby to control the flow of liquid through the said openings. Due to the fact that the valve members contact with the skirt throughout their entire movement, they are liable to adhere to the skirt and thereby impair the efficient operation of the'valve mechanismin controlling the flow of the cooling liquid through both circuits. Due to the construction shown and described herein, I am enabled to overcome the objections noted andto accomplish this object in and through a relatively simple and inexpensive installation.

Describing the parts herein by reference characters, I represents a partof the head of an internal combustion engine, the sar'nebeing provided with an openin 2 communicating with 3 is secured to the engineliead in any ved manner, as by lugs 3' and bolts I. casting-is provided with an annular chem"-- unicates with the opening 2 and with a connection 6 through which cooling liquid from the engine is conducted to the radiportig 2' of thevwater-jacket circuit. An out-' ator; also with a by-pass hose connection I through which the cooling liquid is circulated in the usual manner. 8 denotes a gasket which is interposed between the base of the casting 3 and the engine head.. The base of the casting 3 is also provided with a radially inwardly projecting flange 9 provided with an annular seat 9 for the reception of an outturned flange It] on the bottom of the frusto-conical skirt ll of the valve casing of my thermostatic valve device,

the bottom of the flange Ill being held in engagement with the inner portion of the gasket by the upper wall of the seat 9.

The valve casing comprises; in addition to the flange Ill and the skirt II, a shoulder l2 extending radially andhorizontally inwardly from the top of the skirt and a cylindrical neck l3 extending upwardly from the inner edge of said shoulder, the neck projecting above a flange 3 extending radially inwardly from the outlet casting 3 and being spaced from the inner edge ofsaid flange. A gasket I4 is interposed between the shoulder l2 and the bottom of the flange 3F,

thereby to prevent any circulation of liquid beneath the said flange and around the outside of the neck I3. The y-pass connection 1 communicates with the chamber 5 below the flange wardly,

' wall 0! the skirt l I.

l5 denotes a sheet metal stirrup which is suspended from the horizontal shoulder or flange l2, said stirrup comprising a pair of diametrically opposed vertically extending straps [6 having their bottoms integrally connected with the disk I1 and their upper ends terminating in shanks 18 which are inserted through and secured to the horizontal flange [2, as by riveting. The disk I! has sealed thereto the bottom of a bellows la,

the upper end of which is sealed by a disk 20.

This disk is provided with opposed arms 20 each having at its outer end a valve member 2|, each of said valve members being preferably formed by bending the arms upwardly and down- .the valve members thus formed being eachin the. form of a frusto-conical segment and having their outer surfaces parallel with the The arms 20 are such length that the valve members'2l do not contact with the inner wall of the, skirt until they shall have been moved upwardly by the expansion of the bellows a suflieient distance to enable the valve members to close the opposed openings 22 inthe said skirt. By this construction and arrangement of parts. I am able to overcome the binding and sticking of the prior art valves to I which reference has been made hereinbefore.

an external thread upon which the valve 25*is adjustably mounted, by means of theinternally threaded sleeve 26.

21 denotes the central portion of a yoke, the said portion surrounding the stud 23 and forming a guide therefor. Arms 28 extend outwardly from this guide portion and are provided each adjacent toits outer ,end'with a,slot for the passage of the shanks it of the straps l 6. The riveting of the upper ends of the shanks It to the shoulder I! of the casing anchors the yoke in place so that it serves the double purpose of guiding the stud 23 and limiting the'expansion of the bellows.

With the parts constructed and arranged as described, the operation will be readily understood. When the cooling liquid of the engine isbelow a predetermined temperature, the valve 25 will be seated and the water will circulate freely through the interior of the skirt I I, the openings 22 and the hose connection I to the water jacket of the motor. As the temperature of the cooling liquid rises, the valves 2| will be moved upwardly by the bellows, gradually and finally completely closing the openings 22, while the valve 25 will be correspondingly gradually opened until, when it reaches its fully open position, as illustrated in Fig. 2, the cooling liquid will circulate practically entirely-through the circuit including the radiator.

Having thus described my invention, what I claim is:

1. In a by-pass thermostat valve mechanism for controlling theflow of cooling liquid for an internal combustionengine, the combination of a casing comprising a frusto-conical skirt, a substantially cylindrical neck extending from the smaller end of said skirt and provided at its outer I end with a seatfor a valve, the said skirt being provided with openings through the side wall thereof for the passage of cooling liquid to a bypass connection,.a thermostatic bellows, a stirrup for supporting the ,bottomof said bellows and for suspending the-saidbellows from the upper portion of said casing, a'platesecured to the upper end of said bellows. a stud connected with the upper end of said bellows and extending through the said plate, a valve adjustably mounted on said stud and adapted to cooperate with the seat formed on the end of said neck, and valve members carried by said plate, said members each comprising a frusto-conical segment the outer surface of which is similarly shaped with the inner frusto-conical surface of said skirt and adapted to contact with said surface only when the valve members shall have substantially closed the said openings.

2. In a by-pass thermostat valve mechanism for controlling the flow of cooling liquid for an internal combustion engine, the combination of a casing comprising a skirt, the upper portion of the side wall of said skirt flaring outwardly and downwardly and being provided with one or more openings in such portion for the passage of cooling liquid to a by-pass connection, the lower portion of said skirt having a diameter at least as great as that of the bottom of the flared portion-thereabove, a substantially cylindrical neck extending from th smaller end of said skirt and provided at its outer end with a seat for a valve, a thermostatic bellows, a, stirrup for supporting the bottom of said bellows-and forsuspending the said bellows from the upper portion of said casing, a plate secured to the upper end of said belr-v lows, a stud connected with the upper end of said bellows and extending through and connected to the said plate, a valve adiustably mounted on said stud and adapted to cooperate with the seat formed on the end of said neck, and valve members carried by said plate, said members comprisinga frusto-conical segment the outer surface of which is similarly shaped with the inner frusto-conical surface of said skirt and adapted to contact with said surface only when the valve members shall have substantially closed the said openings.

3. In a by-pass thermostat valve mechanism for controlling the flow of cooling-liquidfor an internal combustionengine, the combination of a casing comprising a frusto-conical skirt, a substantially cylindrical neck extending from the smaller end of said skirt and provided at its outer end with a seat for a valve, the said skirt being provided with openings through the side wall thereof for the passage of cooling liquid to a bypass connection, a thermostatic bellows, a stirrup for supporting the bottomof said bellows and for suspending the said bellows from said casing, a plate secured to the upper end of said bellows, a stud connected with the upper end of said bellows and extending through the said plate, a valve mounted on said stud and adapted to cooperate with the seatformed on the end of said neck, and valve members carried by said plate, said members each comprising a frusto-conical segment the outer surface of which is similarly shaped with the inner frusto-conical surface of said skirt and adapted to contact with said surface only when the valve members shall have substantially closed the said openings. 1 LAMBERT M. PAYNE.

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