US2202993A

US2202993A - Carburetor float support

Info

Publication number: US2202993A
Authority: US
Inventors: Mollberg Byron
Original assignee: Carter Carburetor Corp
Current assignee: Carter Carburetor Corp
Priority date: 1938-04-30
Filing date: 1938-04-30
Publication date: 1940-06-04
Anticipated expiration: 1957-06-04

Description

June4, 1940.`

B. MOLLBERG f CARBRETOR FLOAT SUPPORT Filed April so,l 193s Imfenlor l Byron lilou/berg.

Patente'd June 4, 1940 PATENT OFFICE Y CARBURETOR FLOAT SUPPORT k Byron Mollberg, St. Louis, Mo., assignor to Carter Carburetor Corporation, St. Louis, Mo., a corporation of Delaware Application April 30, 1938, Serial No. 205,373

6 Claims.

This invention relates to pivotal support means for valve controlling floats of the type commonly used to control the fuel inlet valve in an internal combustion engine carburetor.

An object of the invention is to provide substantially simplified pivotal supporting means for valve control means of the above type.

Another object is to provide pivotal support for a oat of the above type arranged so that the fioat may be readily assembled and disassembled upon removal of the lloat chamber cover without the necessity of disturbing or'removing any other part of the mechanism.

These objects and other more detailed objects hereafter appearing are attained substantially by the devices illustrated in the accompanying drawing in which:

Fig. 1 is a sectionall view illustrating part of an internal combustion engine carburetor embodying the invention.

Fig. 2 is a top view of a part of the structure in Fig. 1.

Fig. 3 is a section taken substantially on the corresponding section line of Fig. 1.

Fig. 4 is a vertical section showing a part of the structure in Fig. 1, but with the float bowl cover removed.

Fig. 5 is a perspective view showing the float supporting portion of the float chamber wall, and

Fig. 6 is a similar view showing the float.

Fig. 1 shows a downdraft carburetor including air inlet horn I mounting choke valve 2, mixing chamber 3, and outlet portion II flanged as at 5 for attachment to the intake manifold (not shown) of an associated internal combustion engine. A throttle valve 6 is pivotally mounted between the mixing chamber and outlet portion of the carburetor. Adjacent the mixture chamber is a iloat bowl 'I having an apertured inlet boss 8 receiving a valve seat member 9 and a needle valve I0. Valve Il] is controlled by a tongue II on float I2, the tongue forming part of the float supporting bracket, generally indicated at I3.`

Fuel is supplied to the mixture chamber through a calibrated orice member I4, and passage I5, extending upwardly at an angle through jet bar I6 and opening laterally therethrough by. means of ports as at I1. 'jThe main fuel passages are air bled by means of a passage I8 opening into the top of the float chamber, and perforated tube I9.

'I'he outer wall of float chamber 1 is recessed adjacent boss 8, as at 20, to form a ledge 2I beneath valve seat member 9. Projecting from ledge 2l are

lugs

22, 23 and 24. Float bracket I3 includes side arm portions 25, having recesses 26 in the outside edges thereof.

In assembling they float with the carburetor, bracket I3 is inserted into recess 20 from the top or inner side and recesses 26 are applied over lugs 22 from the top'thereof. In the assembled position, the bracket arms rest upon lugs 23 which have curved or tapered upper surfaces forming pivotal supports.

Lugs

22 and 23 prevent disassembly of the float except by upward movement thereof. l

Cover portion 21 of the float bowl includes an inverted U-shaped projection 28 depending therefrom on each side of valve seat memberll, as shown in Fig. 3, and with its lower extremities normally positioned immediately above bracket I3 so as to prevent upward movement thereof. Thus lugs 22 and 23 and element 2B form a stable pivotal support for the float which may be readily assembled and disassembled when the cover is removed without the necessity of rst removing a float supporting pin or other holding means, as has frequently been the case.

As shown in Fig. 4, needle valve I0 normally extends slightly inwardly beyond the inner exltremity of seat member 9 and in order to remove the valve seat element, which is pressed into place, a screw driver may be inserted behind lug 24, as indicated, and pressure applied to the exposed end of the valve. This inlet valve construction is more fully described and claimed in my co-pending application, Serial No. 205,372, led April 30, 1938, of which this application is a continuation-in-part.

The invention is not limited to the structure shown but may be modified in various respects as will occur to those skilled in the art and the exclusive use of all such modications as come within the scope of the appended claims is contemplated.

I claim:

1. In combination, a float chamber, a port in a wall thereof, a valve in said port, a float arranged for controlling said valve and having a supporting bracket including a recessed part, lug structure on the wall of said chamber engaging the under side of said bracket and pivotally supporting the same, and other lug structure on said wall extending into said recessed part of said bracket for resisting disassembly of said bracket from said supporting lug structure.

2. The combination of elements specified in claim 1 further including a removable cover for said chamber having a member normally positioned adjacent said bracket for preventing disassembly thereof from said lug structure.

3. The combination of elements specied in claim 1 in which the recessed part of said oat bracket extends along the inner and side portions of said second mentioned lug structure whereby disassembly of said bracket from said lug structure is prevented except by Vertical movement of said bracket.

4. In combination, a float chamber, a port in a wall of said chamber, a valve in said port, a float in said chamber arranged for controlling said valve, a valve engaging bracket on said float having recesses in the side edges thereof, lug structure on the wall of said chamber engaging the underside of said bracket for pivotally supporting the same and spaced lugs on said Wall extending into said recesses whereby assembly and disassembly of said float with said chamber can be effected only by upward movement of said bracket relative to said lugs.

5. The combination of elements specied in claim 4 further including a cover for said chamber having a member normally disposed above said bracket for securing the same in position.

6. The combination of elements specied in claim 4 in which said bracket includes a lip portion for cooperating With said valve.

BYRON MOLLBERG.