The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 1998
Filed:
Dec. 20, 1995
Kiyozumi Takahashi, Kanagawa-ken, JP;
Shigeyoshi Komaki, Tokyo, JP;
Ahresty Corporation, Tokyo, JP;
Abstract
A liquid feeding pump includes two coaxial cylinder chambers, a piston mounted in each chamber, and a piston rod connecting the pistons. A head side of one cylinder chamber functions as a liquid chamber, a rod side functions as a first air chamber, a rod-side of the other cylinder chamber functions as a second air chamber, and a head side functions as a third air chamber. The liquid chamber is formed with liquid inlets or outlets. Each of the air chambers is formed with air inlets or outlets, a part of the supplying pipes connected to the liquid inlet or outlet of the liquid chamber is wound around an outer periphery of the other cylinder chamber, or a peripheral wall of the other cylinder chamber is formed with a liquid cooling chamber and supplying pipes communicated with and connected to the liquid inlets or outlets of the liquid chamber are connected to the liquid cooling chamber.