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Патент USA US2130847

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Sept- 20, 1938.
Filed May -13, 1936
Im/en for
' Char/e5 F,’ Margy/8746f.
Patented Sept. 20, 1938
‘ 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
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
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
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
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
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.
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