Патент USA US2405563код для вставки
Aug“ 13, 19%. D. ,J. ENRIGHT ‘ 2A®5563 CARBURE'I'OR Filed Jan. 5, 1944 2 Sheets-Sheet 1. . ‘Attorneys Patented Aug. 13,_ 1946 ‘ *1 V r 2,405,563 , UNITED. ‘STATES. PATENT oF-FicE * » Daniel J. Enright, Rochester, N. Y. Application January 5, 1944, Serial No. 5173081v , 1 Claim. (01. 261-49) ' l The present invention relates to new and use ful improvements in carburetors and has for its verse shaft [2 to which is secured a butter?y valve primary object to provide unitary control means angles to each other and to one end of the shaft I2 is also secured a throttle lever [4 by a split end l5. To the other end of the lever i4 is attached for ‘the needle valve of the ?oat chamber and the butter?y throttle valve and butter?y air intake valve to insure a proper and uniform mixture of air and fuel fed to the intake manifold of the engine. A further important object of the invention is l3. the shafts ‘l and I2 bEillgDOSitiOllGd at right a throttle control rod [6. . A pulley wheel I‘! is ?xed to the shaft 12 for rotation therewith and on the pulley is trained a chain or other ?exible member [8, the chain to eliminate the necessity of the usual Venturi in 10 also being trained over an idler pulley l9 jour a carburetor and to provide a mechanism for furnishing a proper mixture of fuel‘ and air through an unrestricted air tube of uniform diameter. ‘ Another object is to provide novel means for actuating the needle valve of the carburetor and for adjusting the needle valve independently of naled on a, pin 20 at one end of an elongated plate IS’, the plate being supported adjacent its other end on a vertical rod 2| which is slidably and rotatably mounted in a bracket 2|" and se cured in adjusted position by a set screw 2|". The bracket 2|’ is secured tothe side’ of the tube 5. One ‘end of the chain 18 is attached to one end the butter?y valve. -~ of a pair of elongated superposed cam plates 22 A still further object is to provide a carburetor and 23, while the other end of the chain is at of simple and practical construction which is e?i 20 tached to the other end of the lowermost plate cient and reliable in performance, relatively in 23. To the remaining end of the upper plate 22 expensive to manufacture and otherwise well is secured a tube 24 which is internally threaded adapted for the purposes for which the same is at its upper portion and has a cup 25 on its upper intended. end. An adjusting screw 26 is threaded in the Other objects and advantages reside in the de tube 24 with its lower end journaled in the plate tails of construction and operation as morevfully 25 23 and upset to secure the screw to said last hereinafter described and claimed, reference be named plate. The pulley I9 is eccentric with re ing had to the accompanying drawings forming spect to the axis of the pin 2| in order that the part hereof, wherein like numerals refer to like pulley l9 may be adjusted laterally and vertically parts throughout, and in which: to properly align the pulleys in accordance with Figure 1 is a side elevational view. the adjustments made in the cam plates and thus Figure 2 is a top plan view. reduce friction of the chain on the pulleys. Figure 3 is a longitudinal sectional view through The upper end of the screw is formed with a the air tube. cylindrical head 21 freely rotatable in the cup Figure 4 is a vertical sectional view through 25 and the inner walls of the cup are vertically the needle valve and ?oat chamber. corrugated as indicated at 28 in the valleys of Figure 5 is a detail in section of the sliding cam which is seated a spring projected ball 29 re for actuating the needle valve. cessed in the side of the head 21 to prevent idle Figure 6 is a sectional view taken on a line 6-6 rotation of tho head and to secure the screw 26 of Figure 5. _ in its adjusted position in the tube 24. Figure 7 is a detail of the adjustable pulley, Accordingly, one end of the upper cam plate with parts in section. 22 may be raised or lowered by the manipulating Referring now to the drawings in‘ detail, the of the screw 26. numeral 5 designates an air tube which is open The plates 22 and 23 are formed with register at one end for admitting fresh air and is pro 45 ing longitudinal slots 30 and 3|, respectively, vided at its other end with an attaching ?ange through which is freely received the upper end 4 for attaching to a manifold 6 of an internal of a needle valve 32 which extends vertically combustion engine. . through a port 32' in the bottom of the tube Near the open end of the tube is a transverse 5 and into the ?oat chamber 33 of conventional shaft 1 to which is secured a butter?y choke valve construction for engaging the valve seat 34 there 8, one end of the shaft having a lever 9 attached in. , thereto by a split end H]. To the other end of A cup 35 is formed with a hollow internally and the lever is attached a choke wire ll adapted externally threaded stem 36 which is threaded for manual actuation in the usual manner. into the top of the tube 5 and within the cup is Near the other end of the tube 5- is a trans 55 a hollow cylindrical adjusting plug 31 having an 2,405,563 ‘ _> - 3 ' 4 . ously opened and closed to uniformly supply a predetermined mixture of fuel and air to the in take manifold of the engine. It is believed that the details of construction externally threaded stem 38 threaded into the stem 36. The needle valve 32 is freely received in the plug 31 and stem 38 and a coil spring 39 ' is mounted on the lower portion of the needle and manner of use of the device will be readily valve between the stem 38 and a collar 411 thread understood from the foregoing without further ed on the lower end of tho valve, the adjustment of the plug 31 in the cup 35 regulating the tension of the spring 39. detailed explanation. , l ' Having described the invention, what is claimed The cup 35 is also internally vertically corru; gated and the plug'3'l fis'provided ‘with a. spring‘ as newlis= , v . . . . j .A' ‘carburetor “comprising ‘an‘air intake tube adapted‘ for’attaching to the intake manifold of projected ball ‘similar to the cup 35 and head 21 an engine, a ?oat chamber carried by the tube to secure the plug 31 in adjusted position and having communication therewith, a needle The upper portion of the needle valve 32 is ‘valve slidably mounted transversely of the tube threaded for engagement by a cup 40 having its and controlling the feeding of fuel from the float lower end overlying and bridging the slots 30 chamber into the tube, a throttle valve in the and 31 for sliding engagement by the upper cam plate 22 whereby to raise the needle valve upon _ tube inwardly of the needle valve, an air con movement of the plates in one direction, the , trol valve in the tube outwardly of the needle spring 39 closing the valve. r -~ ‘ valve,'a link connecting the throttle and air valves A cylindrical plug M is threaded on the needl 20 for simultaneous opening and closing movement, a pulley secured to the shaft of the throttle valve, valve 32 into the cup 40 and is also provided an idle pulley journaled on the tube, an endless with a spring projected ball for engaging the ?exible member trained on said pulleys and in internal vertical corrugations of the cup 40 simi cluding an elongated cam therein having a longi lar to the cup 25v and head 27 to, secure the cup 40 in adjusted position.‘ A locking cap 42 25 tudinal slot receiving the needle valve, vertically spaced members adjustably carried by the needle is threaded on the upper end of the needle valve. valve and positioned respectively above and below Between the needle valve 32 and the choke the cam and in engagement therewith, one of said valve 8 is a butter?y valve 43 secured on a shaft members being operable to vertically adjust the 44 journaled in the tube 5 parallel to the shaft 1 and forming an air control valve. To the outer 30 needle valve, and said cam being operable to open the needle valve, spring means for closing endvof the shaft 44 is secured the split end 45 the needle valve, and means for adjusting the of a lever 46 and to the other end thereof is piv idle pulley in accordance with the adjustment of otally attached a turnbuckle 4'!v connecting the said members to center the ?exible member be lever 46 to the pulley wheel I‘! by means of an eccentrically disposed pivot pin 48. Accordingly as the throttle lever I4 is actuated by the throttle rod 16, the air valve 43, needle valve 32 and throttle valve [3 will be simultane 35 tween the ?anges of the idle pulley and to take up slack in the ?exible member. DANIEL J. ENRIGHT.