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:
Sep. 02, 2003
Filed:
Oct. 30, 2002
Kiyoshi Nishio, Sanda, JP;
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Abstract
It is an object of the invention to, even in the case where liquid containing a sedimenting material such as slurry is used, prevent sedimenting and aggregation from occurring in a pump. As means for attaining the object, a bellows that is extendingly and contractingly deformable in the axial direction is placed in a pump body with setting the axis B of the bellows vertical so as to be driven to perform extending and contracting deformation, and form a liquid chamber inside the bellows A suction port and a discharge port are formed in an inner bottom face of the pump body facing the liquid chamber Liquid is sucked from the suction port into the liquid chamber by extension of the bellows and the liquid in the liquid chamber is discharged from the discharge port by contraction of the bellows The inner bottom face is formed into a conical shape in which the face is downward inclined as moving toward the discharge port Therefore, also liquid containing a sedimenting material such as slurry can be always smoothly discharged toward the discharge port along the downward inclined face of the inner bottom face without collecting on the inner bottom face of the liquid chamber.