Title:
フィルター及び流体のろ過方法
Document Type and Number:
Japanese Patent JP4466895
Kind Code:
B2
Abstract:
A spiral wound filter element is disclosed which includes alternating layers of filter medium and diffusion medium wrapped about a cylindrical core defining a central axis of the filter element. The alternating layers extend from a radially innermost layer of the filter element to a radially outermost layer of the filter element, the diffusion medium is defined by a continuous lengthwise sheet of mesh material, and the filter medium is defined by at least one sheet of filter material arranged along the length of the continuous sheet of mesh material. The alternating layers of filter medium and diffusion medium define three distinct radially disposed layered filtering sections surrounding the cylindrical core, and include a first filtering section having radially outer prequalifying layers, a second filtering section having middle prequalifying layers and a third filtering section having radially inner qualifying layers. The radially outer prequalifying layers and the middle prequalifying layers define about two-thirds of the radial distance from the radially outermost layer of the filter element to the radially innermost layer of the filter element.
Inventors:
John El Preck
Thomas Jay Hamlin
Richard Sale
Sea Thomas Paul
Thomas Jay Hamlin
Richard Sale
Sea Thomas Paul
Application Number:
JP2000573450A
Publication Date:
May 26, 2010
Filing Date:
October 05, 1999
Export Citation:
Assignee:
SCIENTIFIC PHARMACEUTICALS, INC.
International Classes:
B01D29/07; B01D25/24; B01D29/11; B01D39/08; B01D39/16; B01D39/18; B01D63/06; B01D69/12
Domestic Patent References:
| JP50157576U | ||||
| JP6063316A | ||||
| JP10504241A | ||||
| JP1070119A | ||||
| JP60187313A | ||||
| JP7246306A |
Attorney, Agent or Firm:
Akira Okawa