US 2021337 A
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Nov. 19, 1935. J. J. TREF-z AIR INTAKE FOR MANIFOLDS Filed July 31, 1934 Patented Nov. 19, 1935 UNITED STATES PATENT OFFICE AIR, INTAKE Foa MANIFoLns Application July 31, 1934, Serial No. '737,793
8 Claims. (Cl. 251-145) My invention relates to an air supply device for the intake manifold of an internal combustion engine. The structure which I have devised is automatically operated through the medium of the suction from the engine that draws the gaseous vapor from the carburetor through the intake manifold to the cylinders of the engine.
lVIy device is capable of being readily adjusted to take care of different makes or types of engines, and its operation is such that it automatically accommodates itself to dilferent speeds of the engine or different amounts of suction from the cylinders. In other Words, the greater the suction the greater the amount of air that is drawn into the Igaseous vapor in, the manifold and fed to the cylinders.
Furthermore, the operator of a motor vehicle may manually adjust this device according to different atmospheric pressures depending upon whether the vehicle is being drivenin mountainous country or near sea-level. The device herein disclosed is adapted to increase the speed of operation of the engine and in actual tests has` been found to increase the speed of the crank-shaft in a motor vehicle 200 R. P. M. to 300 R. P. M.
'Ihe apparatus which I have devised is simple and novel in construction; its parts are sturdy so that they will withstand severe usage; it is effective in performing its functions; it is easy to install as it does not require the use of special tools and may be installed by a person unfamiliar with mechanical work; and it is economical to produce so that it may be sold to the user for a reasonable retail price. Further objects and advantages will be apparent to persons skilled in the art after my invention is understood,
I prefer to practice my invention and to accomplish its numerous objects. in substantially the manner hereinafter fully described and as more particularly pointed out in the claims. Referv ence is herein made to the accompanying draw- ,ing that forms a part of this specication.
like reference characters designate like parts Where they appear in the diiferent views.
The device comprises a hollow cylindrical body having external threads on its upper and lower portions, the former of which threads receive the 5 interiorly threaded lower portion of a tapered or dome-shaped cap 6 that screws on to the body. The top of the cap is provided with an outlet in the form of a coupling 'l whereby a connection and communication may be made with a con- 10 yenient portion of the intake manifold 8 of an internal combustion engine such as used in motordriven vehicles.
A cup-shaped member 9, having an interiorly threaded upper portion, is screwed upon the lower threads. of the body and has its bottom wall I0 provided with air-inlet holes II and bulged inwardly to form an annular channel or gutter I2 at the juncture between the bottom and side walls of the member 9. An air-strainer I3, made preferably of ne wire mesh, is inserted into the member 9 and rests upon the bulge of the bottom wall I0 to prevent ingress of dust o-r foreign matter.
` At the top and bottom ends of the cylindrical body 5 I have provided transversely disposed guide elements I4 and I5 respectively that are preferably correspondingly shaped and made from the same die. The top guide element Ill has an annular flange IIIet around its edge that is pendently disposed and ts inside the topy portion of the body 5 to which it is secured by welding or otherwise, and said element is also provided t with a central aperture that is surrounded by a depending ange Mb that carries an inner bushing I6 the purpose of which. will later appear. TheI lower guide element I5 has its outer annular flange I Eaupstanding and welded or otherwise secured in the lower end of the body wall 5, and said element has a central aperture surrounded by an upstanding ange I5b that extendsI towards and axially alines with the corresponding central flange I lb of the other guide element.
The flange I 5b provides the lower guide or 45 bearing for the hollow stem Il of a mushroom valve body I8 that normally rests upon the upper surface of the transverse element I4, and the bushing I5 provides a stop against which the adjacent upper end of a coiled expansion spring I9 abuts to yieldably maintain the valve body in seated position. The lower portion of the hollow stem I1 projects below the lower guide element where it has external threads on which an adjusting nut 2U is screwed, and the spring I9, 55
which surrounds the stem, extends through the ange 5b and has its lower end resting upon the nut 23.
rIhere is a plurality of discharge ports 2| in the upper portion of the hollow stern I1 just below the valve body so that when the latter has been lifted a sufficient distance by the suction from the engine cylinders one or more of said ports will be exposed above the upper guide element I4 and the air drawn through these ports from the lower open end of the hollow stem will be sucked into the dome and pass into the manifold where such air mingles or mixes with the gaseous vapor in transit from the carburetor to the engine cylinders.
I have provided means for adjusting the size or capacity of the discharge ports which means comprise a metal tube 22 of an outside diameter that permits it to be adjustably inserted inside the hollow stemV il. The upper portion of the tube 22 is provided with ports 23 that may be registered with ports 2l in the stem or may be moved with respect thereto in order to restrict the sizes of said ports 2l as shown in detail in Figure 3. This adjustment and movement of the inner tube 22 is accomplished by providing an L- shaped annular flange 24 at the lower end of said tube. The upstanding portion of this flange 2d is spaced from the tube 22 a distance equal to the thickness of the wall of the tubular valve spindle lIl and said upstanding portion has internal threads so that it may be screwed up on the threads at the lower portion of the spindle. After being adjusted to the proper position the inner tube may be secured against accidental movement by screwing down a lock nut 25 on the spindle against the upper edge of the flange 24.
It will be understood that in the event it is desired to shut off this device so that no air will pass through it to the manifold, this may readily be done either by rotating the inner tube 22 to close the air discharge ports 2l, or by screwing up the nut 20 to tighten the spring sufficient to overcome the suction that raises the valve body it and exposes the ports 2| in normal operation.
Modications of the structure herein shown may be made without departing from the principles involved, and it should be noted that the drawing and the within description are given for the purposes of understanding only and that no unnecessary limitations are to be understood therefrom.
What I claim is:
1. A device of the kind described comprising a body provided with guide means, a tube closed at one end and reciprocable in said guide means and having ports at its closed end that are opened and closed when said tube is reciprocated, a hollow cap surrounding the ported end of said tube for establishing communication between said device and a suction passageway, and means for altering the sizes of said ports and thereby regulating the quantity of fluid discharged from said ports into said cap.
2. A device of the kind described comprising a body provided with guide means, a tube closed at one end and reciprocable in said guide means and having ports at its closed end that are opened and closed when said tube is reciprocated, a hollow cap surrounding the ported end of said tube for establishing communication between said device and a suction passageway, and means operable from an end of said tube for altering the sizes of said ports and thereby regulating the for establishing communication between said device and a suction passageway, and means opu) erable from the opposite end of said tube for altering the sizes of said ports and thereby regulating the quantity of fluid discharged from said ports into said cap'.
4. A device of the kind described comprising a body provided with guide means, a tube closed at one end and reciprocable in said guide means and having ports at its closed end that are opened and closed when said tube is reciprocated, a hollow cap surrounding the ported end of said tube for establishing communication between said device and a suction passageway, and an adjustable hollow core within said tube having ports at its inner end that normally register with the ports in g said tube said tube and core being movable relative to each other 'whereby to regulate the quantity of fluid discharged from said ports into said cap'.
5. A device of the kind described comprising a body provided with guide means, a tubular spindle reciprocable in said guide means and having ports adjacent one end certain of which ports are adapted to be opened and closed by the reciprocation of the spindle in said guide means, a coiled expansion spring surrounding the spindle and having one end abutting said guide means, an adjustable stop on said spindle and engaged with said spring to adjust the tension thereof, means for altering the sizes of said ports and thereby regulating the quantity of uid discharged from said ports, and means on said body for establishing communication between said ports. and a suction passageway.
6. A device of the kind described comprising a body provided with guide means, a tubular spindle closed at one end and movable longitudinally in said guide means and having discharge ports adjacent said closed end that register with said guide means, a coiled expansion spring surrounding said spindle and having an end abutting said guide means, an adjustable stop engaged with said spring to adjust the tension thereof, means for altering the sizes of said ports and thereby regulating the quantity of fluid passed through said ports, and a hollowcap on 55 said body and surrounding the ported end of said spindle for establishing communication between the above described structure and a suction passageway.
7. A device of the kind described comprising a body having a guide, a hollow spindle closed at one end and having ports adjacent said closed end and normally in registry with said guide, saidspindle being capable of longitudinal movement in said guide to expose certain of said ports, an Vadjustable stop on the other end of said spindle, an expansion spring interposed between said guide and stop for maintaining said ports normally closed, a tube telescoped by Vsaid spindle and having means on its end portion adjacent said ports for adjusting the sizes of said ports and thereby regulating the quantity of fluid passing through the latter, and means on said body lfor establishing communication with a suction passageway.
8. A device of the kind described comprising a body having a guide, a spindlereciprocably mounted in said guide and consisting of a pair of telescoped tubes, having lateral discharge ports at one end that are adapted to register with each other, the outer tube being closed at its ported end, an adjustable spring coaoting with said spindle for yieldably maintaining the latter in a position with its ports opposite said guide, means for locking the inner tube in divers positions with respect to the outer tube to adjust the sizes of said ports and thereby vary the quantity of uid that may pass through said ports, and a hollow cap on said body enclosing the ported ends of said tubes and adapted to establish communication with a suction passageway whereby said spindle may be moved by the suction longitudinally in said guide to expose certain of the ports for the egress of fluid passing through the inner tube.
JULIUS J. TREFZ.