Патент USA US2130847код для вставки
Sept- 20, 1938. c. P. KERSGIETER 2,130,847 VALVE DEVICE Filed May -13, 1936 ‘ Im/en for ' Char/e5 F,’ Margy/8746f. Patented Sept. 20, 1938 2,130,847 f 1: UNITED STATES PATENT OFFICE 2,130,847 VALVE DEVICE ‘ Charles P. Kersgieter, St. Louis, Mo., assignor to Carter Carburetor Corporation, St. Louis, Mo., a corporation of Delaware Application May 13, 1936, Serial No. 79,469 4 Claims. Thisinvention relates to valve devices applica ble, particularly, to needle valve assemblies in internal combustion engine carburetors. Carburetors for internal combustion engines, and particularly automotive engines, are ordi narily provided with ?oat operated needle valves for controlling the admission of fuel to a con stant level chamber. Fuel passes from this chamber through a calibrated ori?ce or jet to the 10 mixing conduit and thence to the engine ?ring chambers. The needle valve assembly frequently comprises a cylindrical seat or body member screwed into the cover or top portion of the fuel 15 bowl, and a special, non-circular needle valve of solid construction operating inside the seat member. The seat member is made inexpen sively as a screw-machine product of brass or similar metal, but the needle valve is made pref erably of special hard material, such as Monel metal, and due to the special shape, is relatively expensive to manufacture. An object of the present invention is to facili tate, simplify, and cheapen the production of needle valve devices of the type described above. A more detailed object is to provide a needle valve of the above type which may be formed in its entirety by ordinary machine operations and does not require specially shaped stock. Still another object is to provide a needle valve of skeletonized or recessed construction so that the valve may ?t relatively snugly within the bore of the seat member while permitting ?uids to flow readily through the valve when off its seat. According to the present invention, the valve comprises a barrel-shaped body portion con structed of a sheet metal blank having radiating ?ngers bent axially of the blank and secured at their ends to a separate tip element shaped to cooperate with the valve seat. (Cl. 251-130) portion I , mixing chamber 2,‘and outlet 3, ?anged as at 4 for attachment to the intake conduit of an engine (not shown). A throttle valve 5 is pivotally mounted on shaft 6 near the lower por- , ticn of the carburetor and has a crank (not ' shown) for manual operation. The accelerating pump piston rod 1 is connected to the throttle by means of lever 8 permanently pivoted at 9, link I 0, and a suitable crank or arm (not shown) rigid with the shaft 6. At the side of the mix ture passage is a ?oat bowl H with a cover I 2 having a projecting boss I3 for attachment to a conduit connected with a fuel tank (not shown). Boss [3 has a central vertical bore l4 communi cating with horizontal opening l5 and threaded 15 for receiving the needle valve assembly, generally indicated at l6. Needle valve I1 is controlled by ?oat l8 to maintain fuel within the bowl H at a substantially constant level. Fuel passes through the calibrated jet I9 to 20 the main nozzle 20 and idling passages 2| and 22 in a manner well known in the art. Nozzle 20 terminates inside the primary venturi 23 which is concentric with additional venturis 24 and 25 in the interior of the mixture passage. The needle . valve seat member includes 25 a threaded nipple 26 for attachment to boss l3 and having a longitudinal bore 21 and a lower portion 28 having a bore 29, substantially larger than bore 21, and lateral apertures 30. A shoulder 3! be 30 tween bores 21 and 29 forms a valve seat. The needle valve is constructed of a separately formed tip element 32 having a tapered portion cooperating with the valve seat 3| to control the passage of ?uid through the seat member and a 35 skeletonized body or guiding part. The body part is formed of a sheet metal blank, as shown in Figure 4, having ?ngers 33 radiating from the The above objects and other more detailed ob- ‘ solid center portion 34. Fingers 33 are bent ax jects hereafter appearing are attained substan tially by the structure illustrated in the accom panying drawing, in which: Figure 1 is a side view of a carburetor, section ially of the blank and at their extremities have 40 abrupt offsets as at 35, secured within a groove 36 around the tip element 32. The body portion, when formed as shown in Figures 2 and 3, com alized in part through the ?oat bowl and in part through the mixture passage of the carburetor. prises essentially a plurality of spaced longitu dinal ribs forming a hollow, barrel-shaped body 45 Figure 2 is an enlarged section showing a part of the structure in Figure 1. Figure 3 is a section taken on the line 3-3 of which ?ts relatively snugly within bore 29 in the Figure 2, and Figure 4 is a view of the sheet metal blank prior to bending. The carburetor shown in Figure 1 includes a generally cylindrical body hollowed to form a 55 downdraft mixture passage including an air inlet seat member so as to be guided thereby in its movement towards and away from the valve seat. The tip element 32 may be conveniently formed by screw machine operations while the body por 50 tion is essentially a punch press product or stamped. The two parts of the valve may be ?rmly assembled by any suitable means, the off sets 35 being preferably pressed within groove 36 55 2,130,847 in the tip element so as to be held therein by the rigidity of the metal and also by friction. The solid portion 34 at the center of the blank forms the tip part of the valve opposite the sepa rate element 32 and is engaged by the float lever 31 which controls the valve. - The above described structure and method of forming the needle valve are merely illustrative and these may be modi?ed in various respects, ,as will occur to those skilled in the art. The exclusive use of all such modi?cations as come within the scope of the appended claims is con templated. I claim: 1. As a new article of manufacture, a needle valve having a separately formed tip part for cooperating with a valve seat, and a substantially hollow body part comprising a plurality of spaced ribs secured at one end to said tip part, said ribs merging at their ends opposite said tip part. '2. As a new article of manufacture,’ a needle ‘valve comprising a separately formed end por tion having a tapered part for cooperating with a valve seat and a grooved, part, and a hollow body portion formed of ‘sheet metal structure withspaced ribs converging towards and secured (m L1 to said grooved part, the interior of said body portion being substantially unobstructed to per mit free passage of ?uid therethrough when the valve is o? its seat. 3. As a new article of manufacture, a needle valve comprising a separately formed tip part for cooperating with a. valve seat, and a body part formed of a sheet metal blank with a sub stantially solid central portion and'spaced ribs emanating therefrom and converging towards and secured to'said tip part, the interior of said body portion being substantially unobstructed to permit free passage of ?uid therethrough when the valve is off its seat. 4. In combination, a valve seat member com prising a valve seat and a cylindrical ?uid pas sage adjacent said seat, a valve comprising a hol low, ribbed body part closely ?tting in said pas sage and guided thereby and having a separately formed tip at one end for cooperation with said Valve seat, and a valve actuator engaging the other end of said valve body, the body portion of said valve being formed exclusively of a plurality of guiding ribs, said ribs tapering and. merging at one end for cooperating with said actuator. CHARLES P. KERSGIETER.