US1582221A - Vacuum tank - Google Patents

Description

April 27, 1926.

T. J. MGCARTHY VACUUM TANK FledAugust 11l 1924 Patented Apr. 27, `r19263'.

UNITED STATES PATENT orifice.

THOMAS J. MCCARTHY, oF Los Antennas, CALIFORNIA.

VACUUM TANK.

Application filed August 11, 1924. Serial No. 731,445.

vracuuin Tanks, of which the following is av Liecitication.V

This invention relates to vacuuni tanks,l and consists ot the novel features herein shown, describediand claimed. p

The leadin object is to ineke a vacuuin tank in which the valves snap openand snap shut so as to inake positive action.

Another object is to improve and siinplii'f,Y

the deta.' ls ot construction oi? a vacuun'i tank .tor use in supplying fuel to the engines ot inotor vehicles and the like.

Other objects and advantages will appear troni the drawings and specitication.

The drawings illustrate the construction.

and operation of a vacuum tank embodying the principles ot' my invention.

Figure 1 is a top plan view as indicated by the arrow 1 in Fig. 2.

Fig. 2 is a sectional elevation on the line 2m?. of Fig. 1 and looking in the direction indicated by theV arrows, the parts being shown in position with the float elevated and with the ventopen, as when thereis plenty ot gasoline in the tank. n

Fig. 3 is a view analogousto Fig. 2 with the float down and vent closed and the other valves open as when drawing gasoline troni the supply tank by the suction ot' the engine.

Fig. 4 is a top plan view analogous to Fig. 1 with the cap reinoved to show the inechanism.

Fig. 5 is an enlarged detail ot one Vof the valve operating levers.

Fig. 6 is a sectional detail` on the line 6 6 of F ig. 5.

rlhe 'details of construction and operation shown in the drawings are as follows:

The tank body 1 is a straight cylinder closed at its lower end by a cap 2 and at 4its upper end by a cap 3. A nipple 4 extends downwardly troni the 1center ol' the cap 2 and the feed pipe 5 leading to the carburetor is connected to the nipple 4 by a union nut 6.

An inlet fitting 7 has a nipple 8 and vis mounted inside of the cylinder 1 near the top with the nipple 8 extending outwardly through the wall of the cylinder. The supply pipe 9 leading from the supply tank is 24 .is lined in the upper outer valve seat 15. A1 y y 4nected to the outer end ot the lever 33 and yengages a valveseat 21.

connected to the nipple 8 by a union nut 10. A port 11 leads troni the kpipe 9 through the nipple 8 to a vertical port 12. The port 12 leads from they upper end of the tting T downwardly past the port 11 and forms a settling basin 18 having a cleanout plug 14 atits lower end. The upperend ot the port 12 is linished toforin a valve seat 15.

The suction valve fitting 15 has a inain body tltting inside of the shell 1 and a nipple 17 extending through the shell. A- vsuce ktion pipe 18 is connected to the nipple 17 by a union nut 19 andthe suction pipe is to be connected to the engine in tlieusual way. i valve seat E20 is formed at the top ot the fitting ,1G inside ot the tank and a port 21 leads downwardly and outwardly to communicate with the pipe 18. A valve seat is formed from tlie'lower end of the litting 16 and a port 23 extends upwardlyk and outwardly, and an elbow shaped tube end ont the port 23 to torni a vent.

Bearing arins 25 and .26 entend upwardly and downwardly frointhe itting 7. Levers 2T and 28 are pivotally `connected to the ends'of the arnis and 26 andare pivotally connected to the iioat stein 29. A bracket extends inwardly trointhe Alitting 1G and the stein 29 vslides freely through the bracket at the axial Centeroltlie tank y1. Bearings 31 and Xtend inward-ly troni the fitting 16 and levers 83 and 34 are pivotally connected to the bearings 31 andl and to the stein 29. An inlet valve is connected to the outer endet the lever 27 to engage the suction valve k36 is con- A vent valve Si is connected to the youter end ot the lever34. l rages the valve seat Q2. The parts are adjust d and arranged' so that when the valves and 3G are closed the valve 37 is. opened and vice versa. The levers 27, 33 and 34 are constructed as shown in Figs. 5 and G. y

Atlat end 38 has pivothole 39 for connection to a support and a pivot hole 40 for connection to a valve.` A llange 41 is formed at the opposite end of the flat end 38 from the pivot hole 4.0 and forms a spring seat.

A socket 42 extends troni the head 41, a

coil spring r43 lits upon the socket 42 against the head 41, a second flat end 44 has a plvot hole 45 for connection to the stern 29, a head l-(S is termed integral with the end al, and a shank 47 slides into the socket Ll2 with the spring t3 against the head 46, said head t6 serving as a spring seat, the object being to make an expansion lever. The lever 28 is the same as the other levers with the exception that it dees not connect to a valve and simply serves as an equalizer` to keep the stem 29 straight. The parts are set so that when the stein 29 goes up carrying the levers past a horizontal dead center the tension et' the springs r3.will snap the stem 29 upwardly and snap the valves 35 and 36 closed and snap the valve 37 open, and likewise when the stein 29 goes down past the dead center the tension of the springs will snap the vent valve 37 closed and the valves 35 and 3G open.

The lio-at 8 lits loosely in the tank l and has a central bearing 49. The stem 29 eX- tends loosely through the bearing 49. A pin 5() is lined through the stem above the iloat and a pin 5l is lined through the stem below the lloat, there being considerable lost inotion between the float and the pins. 'Vhen the fioat 48 goes up against the pin 5G, continued rise in the gasoline level in the tank 'l will raise the ioat to raise the stem 29 until the valves 35 and 36 snap sluit and the valve 37 snaps open. Then the tank will continue to supply fuel to the carburetor until the gasoline goes down carrying the float 48 downwardly until the float engages the pin 5l, and continued downward movement of the Heat will move the stem 29 downwardly until the valves 35 and 36 snap open and the valve 37 snaps shut. Then continued action of the engine will cause a suction through the pipe 18 to draw gasoline through the pipe 9.

A removable plug 52 is mounted in the cap 3 to be mounted in the cap 3 to be reioved in priming the tank to start the engine.

Thus I have produced a vacuum tank in which all the valves are mounted upon expansion levers in parallel planes, the levers being connected to a float controlled stem so that when the float goes up or down the valves will snap open or closed.

The bracket 3G has two arms 30a and spaced a reasonable distance apart. An

pansive spring 30c is mounted upon 'the arm 3()b around the stem 29 and a pin 30d is inserted through the stem 29 above the spring so that the tension et the spring 30C will be exerted to raise the stem 2t) and assist in the snap action in closing the valves 35 and 36 at the proper time.

Various changes may be made without departing from the spirit of the invention.

I claim:

l. A vacuum tank having inlet valve mechanism, suction valve mechanism and feed valve mechanism, each o'f the valves being mounted upon expansion levers in parallel planes, a stem to which the levers a re connected. and av float having unrestrieh ed lostmotion connection with the stem, the expansion levers each comprising two ends, telescopic means for connecting the ends, and an expansion spring tendingI to torce the ends apart, so that when the ioat operates the stem to move the levers either way past the dead center the valves will snap closed or open.

2. In a vacuum tank, a tank construction, inlet valve mechanism mounted in the tank at one side, a suction valve mechanism mounted in the tank diainetrically opposite the inlet valve mechanism, a ven valve mechanism mounted in line with the suction valve mechanism, a stein mounted at the axial center of the tank, expansion levers connected to the stein and carrying valves for the three valve mechanisms, and a fourth expansion lever co-operating with the inlet valve expansion lever to balance the pressure upon the stem.

3. In a vacuum tank, a suction valve mec-hanism having a valve seat at its top, a vent valve mechanism in line with the suction valve mechanism and having its seat at the bottom, expansion levers pivotally mounted and carrying valves for the valve seat, and a stem connect-ing the epansion lever so that when the stem goes up the suction valve is closed and the vent valve open and when the stem goes down the suction valve is open and the vent valve closed.

In testimony whereoin I have signed my name to this specilication.

THOMAS J. ilIcCr-XR'IHY.

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