Patent ID: 6267161
Filing Date: 2001-07-31
Classification: F04B

Abstract:
A carbon-dioxide pump for tires connectable to a carbon dioxide bottle, comprising: a dispensing head; a nosepiece, located at said dispensing head, for coupling to a tire valve; a threaded hole, connected to said nosepiece, to which the bottle of carbon dioxide is hermetically fixable; a sliding hole connected to said threaded hole; a needle-equipped pin slideable in said sliding hole for piercing a membrane of the bottle; a flow control element of a frustum-shaped type which is manually actuatable so as to rotate in order to hermetically close said bottle after piercing said membrane, said flow control element being rigidly coupled to said pin; a shell for containing said bottle which is screwed hermetically onto said head; a handgrip slidingly fitted on said shell; a nozzle provided in said head; a valve system for closing said nozzle; and guiding and sliding sealing elements interposed between said shell and said handgrip for providing a short manual pump arrangement in which air compressed by movement of the handgrip with respect to said shell flows between the shell and the bottle and is fed to said nosepiece through said nozzle which is closed by said valve system provided in the head.