# US 11,026,705 B2 · Filter device

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- Number: US 11,026,705 B2
- Document ID: US11026705B2
- Status: Granted
- Kind: B2
- Application number: 16/490,236
- Filed: 2018-03-13
- Published: 2020-01-02
- Granted: 2021-06-08
- Earliest claimed: 2017-03-13
- Assignees: Toray Industries, Inc.
- Applicants: Toray Industries, Inc.
- Inventors: Hajime Sakakibara; Takahiro Yagi
- Web page: https://patentgrep.com/patent/US11026705B2

## CPC

- A61B 17/22: Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61F 2/013: {Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting}
- A61F 2/01: Filters implantable into blood vessels
- A61F 2/0105: {Open ended, i.e. legs gathered only at one side}
- A61F 2/014: {Retrograde blood flow filters, i.e. device inserted against the blood flow direction}
- A61F 2/011: {Instruments for their placement or removal}
- A61F 2002/016: {made from wire-like elements}
- A61F 2002/9511: {the retaining means being filaments or wires}
- A61F 2230/0069: cylindrical
- A61F 2230/0093: Umbrella-shaped, e.g. mushroom-shaped
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

A filter device is capable of reliably capturing emboli and air bubbles and reliably removing the captured emboli out of the body. The filter device includes: a first tube; a second tube protruding from the first tube; a filter arranged such that the distal end side of the filter in the longitudinal direction forms an opening; a ring fixed to the opening; first wires protruding from the distal end side of the first tube in the longitudinal direction thereof; and second wires protruding from holes in the first tube and fixed to the ring; wherein the opening can be opened and closed in the form of a bag when the proximal end side of the filter in the longitudinal direction is defined as the bottom, and the opening can be closed by pulling the second tube towards the proximal end side in the longitudinal direction.

## Claims

### Claim 1

A filter device comprising:
a first tube having holes on a side surface thereof;
a second tube inserted through said first tube and protruding from a proximal end side of said first tube in a longitudinal direction thereof;
a filter arranged such that said filter has a closed end portion on the proximal end side in the longitudinal direction of said first tube, and such that a distal end side of said filter in said longitudinal direction forms an opening;
a ring fixed to said opening and having elasticity or a shape memory property;
first wires inserted between said first tube and said second tube, wherein proximal ends of said first wires are fixed to said second tube, and distal ends of said first wires protrude from the distal end side of said first tube in the longitudinal direction thereof and are fixed to portions of said ring; and
second wires inserted between said first tube and said second tube, wherein the proximal ends of said second wires are fixed to said second tube, and the distal ends of said second wires protrude from said holes and are fixed to portions of said ring;
wherein said opening can be opened and closed in the form of a bag when the proximal end side of said filter in the longitudinal direction is defined as a bottom, and said opening can be closed by pulling said second tube towards the proximal end side in the longitudinal direction.

### Claim 2 (depends on 1)

The filter device according to claim 1, wherein said holes are arranged to form equal angles relative to a central axis of said first tube, and arranged on a same circumference.

### Claim 3 (depends on 1)

The filter device according to claim 1,
wherein said ring has a cylindrical shape, and
fixed positions of said first wires to said ring, and the fixed positions of said second wires to said ring are arranged alternately relative to a central axis of said first tube.

### Claim 4 (depends on 1)

The filter device according to claim 1,
wherein said ring includes a plurality of mountains facing the distal end side in said longitudinal direction, and a plurality of valleys facing the proximal end side in said longitudinal direction, which mountains and valleys are alternately formed,
fixed positions of said first wires to said ring are provided at apices of said mountains, and
fixed positions of said second wires to said ring are provided at bottoms of said valleys.