§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4605500A Expired / Lapsed US ⏱️ 0.0 years remaining

Hollow-fiber filter module

Assignee: Mitsubishi Chemical Corp
•
Filing: 1985-04-02
•
Granted: 1986-08-12
•
Expires: 2005-04-02
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The present invention discloses a hollow-fiber filter module comprising (a) an annular member, (b) a filter membrane consisting of a large number of hollow fibers, (c) a fastening member attached to the inside surface of the annular member for bundling and fixing the hollow fibers in a U-shaped pattern with their both ends left open, (d) a supporting member consisting of a plurality of supporting pillars or a cylinder, said supporting member being joined to said annular member and extending along the U-shaped portions of the hollow fibers, and (e) a hollow fiber retaining member joined to the supporting member and extending through the space enclosed in the U-shaped portions of the hollow fibers. This hollow-fiber filter module is suitable for use in water purifiers for treating large volumes of water containing minute colloidal particles and can be efficiently regenerated by gas bubble treatment to restore its filtering function.

Inventors

  • 👤 Tohru Takemura
  • 👤 Haruhiko Yoshida
  • 👤 Takuma Mukai
  • 👤 Hiroshi Takahashi
  • 👤 Yoshikazu Fujinaga

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 21:31
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/02; B01D63/024; B01D63/0241; B01D65/00; B01D65/02; B01D2313/00; B01D2313/20; B01D2313/203; B01D2321/00; B01D2321/04

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 137 words
A hollow-fiber module comprising (a) an annular member, (b) a filter membrane consisting of a large number of hollow fibers, (c) a fastening member attached to the inside surface of said annular member for bundling and fixing said hollow fibers in a U-shaped attern with their both ends left open, (d) a supporting member consisting of a plurality of supporting pillars or a cylinder, said supporting member being joined to said annular member and extending along the U-shaped portions of said hollow fibers, and (e) a hollow fiber retaining means designed for holding all of said fibers from the bottom in a substantially fixed, parallel relationship sufficient to preclude entangling and flexural fatigue thereof, wherein said means is joined to said supporting member and extends through the space enclosed in the U-shaped portions of said hollow fibers.
Claim 2
Dependent Claim 137 words
A hollow-fiber module comprising (a) an annular member, (b) a filter membrane consisting of a large number of hollow fibers, (c) a fastening member attached to the inside surface of said annular member for bundling and fixing said hollow fibers in a U-shaped attern with their both ends left open, (d) a supporting member consisting of a plurality of supporting pillars or a cylinder, said supporting member being joined to said annular member and extending along the U-shaped portions of said hollow fibers, and (e) a hollow fiber retaining means designed for holding all of said fibers from the bottom in a substantially fixed, parallel relationship sufficient to preclude entangling and flexural fatigue thereof, wherein said means is joined to said supporting member and extends through the space enclosed in the U-shaped portions of said hollow fibers.
Claim 3
Dependent Claim 51 words
The hollow-fiber filter module of claim 1 wherein, when said annular member is sectioned in a direction perpendicular to said hollow fibers, the ratio (R) of the cross-sectional area (Sf) occupied by said hollow fibers to the internal cross-sectional area (Sr) of said annular member satisfies the following condition: 0.11≦R (=Sf/Sr)≦0.06
Claim 4
Dependent Claim 21 words
The hollow-fiber filter module of claim 1 wherein said supporting member comprises a cylinder having an aperture in its side wall.
Claim 5
Dependent Claim 31 words
The hollow-fiber filter module of claim 1 or 3 wherein said hollow fiber retaining means is provided with a tubular spacer whose longitudinal axis is substantially parallel to said supporting member.
Claim 6
Dependent Claim 21 words
The hollow-fiber filter module of claim 1 or 3 wherein said hollow fiber retaining means has at least an annular part.

References Cited (Backward Citations)

JPS5646881A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1989-08-11 1990-02-10 1990-08-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1993-08-11 1994-02-10 1994-08-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1997-08-11 1998-02-10 1998-08-12 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag