Gas and liquid contact apparatus – Fluid distribution – Valved
Reexamination Certificate
1999-10-04
2001-06-12
Chiesa, Richard L. (Department: 1724)
Gas and liquid contact apparatus
Fluid distribution
Valved
C141S364000, C222S552000, C251S216000, C261S072100
Reexamination Certificate
active
06244572
ABSTRACT:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Research and development of the present invention and application have not been Federally sponsored, and no rights are given under any Federal program
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
This invention relates to carburetors and particularly to a carburetor float bowl drain screw and recovery system to facilitate service and to protect the environment by safely draining fuel from a carburetor.
DESCRIPTION OF THE RELATED ART INCLUDING INFORMATION DISCLOSED UNDER 37 CFR §§1.97-1.98
The prior art includes traditional carburetors particularly of the Holley-type. In order to perform service on the carburetor it is necessary to drain the fuel therefrom. This can be a time consuming and risky job since the fuel cannot be allowed to come in contact with the hot engine. These problems are eliminated which proposes a retaining screw and drain screw all in one by the present invention. Furthermore, the fuel that was contained in the previous carburetor designs was discarded causing environmental concerns. The present invention permits reuse of the fuel.
SUMMARY OF THE INVENTION
The invention relates to a carburetor float bowl drain screw and recovery system which permits fuel to be safely drained from a carburetor for servicing purposes. The unique screw assembly is inserted into the float bowl and permits fuel to be drained outwardly into a container through channels in the screw. The screw includes a threaded forward end to retain the bowl in position, an intermediate portion having a channel which extends outwardly through an exterior portion terminating in a hollow hex head.
An insert is threaded into the threaded hollow portion of the retaining screw and includes a tapered forward portion which effects a seal with a mating internal portion of the screw. The insert also includes a channel through which the fuel flows when the rear hex head portion of said insert is loosened. The fuel flows outwardly through a slip end over which a rubber hose is positioned.
Accordingly, an object of this invention is to provide a new and improved float bowl drain screw for carburetors.
Another object of this invention is to provide a new and improved means to drain and recapture fuel from carburetors so that servicing can take place safely.
A further object of this invention is to provide a drain screw and retaining assembly of a unique nature which permit fuel to be safely drained from a carburetor float bowl into a container for recovery purposes.
A more specific object of this invention is to provide a unique screw drain which includes a channel extending into the float bowl and an outer portion which sealingly fastens against the outer wall of the bowl and an insert which threadingly engages the screw drain to control the flow from the channel.
REFERENCES:
patent: 1625572 (1927-04-01), Simpson
patent: 1734232 (1929-11-01), Ryan et al.
patent: 1859126 (1932-05-01), Boeuf
patent: 3184091 (1965-05-01), Hoffman
patent: 4986502 (1991-01-01), Ceroke
patent: 5368181 (1994-11-01), Myers
patent: 5653270 (1997-08-01), Burrows
Chiesa Richard L.
Joel, ESQ Richard A.
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