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:
Aug. 06, 1996
Filed:
Oct. 21, 1994
Hisashi Onodera, Kyoto, JP;
Junichi Yamanaka, Osaka, JP;
Daiken Iki Co., Ltd., , JP;
Abstract
The present invention pertains to a fluid aspiration-collection apparatus for aspirating and collecting a fluid into a suction chamber through a fluid inlet communicating with the suction chamber in the case, and for discharging the fluid through a fluid outlet after completion of fluid aspiration. A primary object of the present invention is to provide an apparatus which is simple in construction and is capable of aspirating the fluid at a constant pressure. The apparatus of the present invention comprises a case having a suction chamber formed, interior of which communicates with a fluid inlet and a fluid outlet, a moving plate constituting a part of a wall section of the suction chamber and movably disposed within the case; and a cylinder in which a piston is airtightly and movably inserted and in which a vacuum chamber is created by relative movement of the piston or itself; the piston and the moving plate being connected to move together; the cross sectional area of the piston being set smaller than the projected area in the direction of movement of the moving plate; and the back side of the piston and the moving plate communicating with the atmosphere.