Carbon-dioxide pump for tires

Details Carbon-dioxide pump for tires Carbon-dioxide pump for tires

2000-03-22

2001-07-31

Huson, Gregory L. (Department: 3751)

Fluent material handling, with receiver or receiver coacting mea

Filling means with receiver or receiver coacting means

With receiver and supply securing means

C141S019000, C141S038000, C141S329000, C222S005000, C417S460000

Reexamination Certificate

active

06267161

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a carbon-dioxide pump for tires.
Small single-use bottles of carbon dioxide for inflating tires are known; they are capable of dispensing the amount of gas required for the inflation of a single tire and their mouth is closed by a membrane which can be pierced at the time of use.
Such bottles are increasingly used because of their great convenience, since they require no physical effort, and because they can be used quickly, however they suffer drawbacks: first of all, the users tend to leave the empty bottle on the ground after use; moreover, the amount of gas contained is not always sufficient to perform complete inflation, especially for tires of the type for all-terrain vehicles, and it does not allow further use in case of subsequent need.
Moreover, during dispensing said bottles cool considerably and this is often not appreciated: the practically instantaneous dispensing of the entire content of the bottle sometimes does not allow to correctly center the tire on the wheel before final inflation.
SUMMARY OF THE INVENTION
The aim of the present invention is to obviate the above-cited drawbacks of conventional devices, i.e., to provide a carbon-dioxide pump for tires which avoids abandoning the empty bottle after use, allows several successive uses with the same bottle and even when the bottle is empty, allows use for tires of any size and type, protects the hand of the operator from the cold during use, and allows to center the tire before final inflation.
Within the scope of this aim, an object of the present invention is to provide a pump which is simple, relatively easy to provide in practice, safe in use, effective in operation and has a relatively low cost.
This aim, this object and others which will become apparent hereinafter are achieved by a carbon-dioxide pump for tires according to the present invention, characterized in that it comprises a dispensing head having a nosepiece for coupling to the tire valve which is connected to a threaded hole for the hermetic fixing of a bottle of carbon dioxide and to a sliding hole for a needle-equipped pin for piercing the membrane of the bottle which is rigidly coupled to a flow control element of the frustum-shaped type that can be actuated manually so as to rotate in order to hermetically close said bottle after piercing said membrane, a shell for containing the bottle which is screwed hermetically onto said head and on which a handgrip is slidingly fitted with the interposition of guiding and sliding sealing elements which are suitable to provide a short manual pump in which the air compressed by the movement of the handgrip flows between the shell and the bottle and is fed to said nosepiece through a nozzle which is closed by a valve system provided in the head.


REFERENCES:
patent: 3597780 (1971-08-01), Coyle
patent: 3834433 (1974-09-01), Thompson
patent: 5316055 (1994-05-01), Brimmer
patent: 5628350 (1997-05-01), Gibb
patent: 5779457 (1998-07-01), Chuang et al.
patent: 5947172 (1999-09-01), Glotin
patent: 6164938 (2000-12-01), Chuang

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