# US 10,441,296 B2 · Corer and method using same

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- Number: US 10,441,296 B2
- Document ID: US10441296B2
- Status: Granted
- Kind: B2
- Application number: 16/258,661
- Filed: 2019-01-27
- Published: 2019-06-06
- Granted: 2019-10-15
- Earliest claimed: 2016-08-19
- Applicants: Xieping Dong
- Inventors: Xieping Dong
- Web page: https://patentgrep.com/patent/US10441296B2

## CPC

- A61B 17/1637: {Hollow drills or saws producing a curved cut, e.g. cylindrical (A61B10/025, A61B17/1695 take precedence)}
- A61B 10/025: {for taking bone, bone marrow or cartilage samples}
- A61B 17/16: Instruments for performing osteoclasis; Drills or chisels for bones; Trepans {(arthroscopic bone cutters A61B17/320016)}
- A61B 17/1633: {Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft (A61B17/1644 takes precedence)}
- A61F 2/4601: {for introducing bone substitute, for implanting bone graft implants or for compacting them in the bone cavity}
- A61B 17/1635: {for grafts, harvesting or transplants}
- 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

Disclosed are a corer and a method using same. The corer includes a connecting sleeve, a power lever connected to the connecting sleeve, a hook cylinder having an upper end inserted into the connecting sleeve, and a cutting hook connected to a side of the hook cylinder. A full-length opening is vertically formed on a side wall of the hook cylinder. The upper end of the hook cylinder is detachably connected to the connecting sleeve. An arc slot perpendicular to the full-length opening is provided on a side of a lower end of the hook cylinder. The corer solves the problem that the existing corer is unable to extract an intact core because it is unable to transect a core base during non-penetrating coring.

## Claims

### Claim 1

A corer, comprising:
a connecting sleeve;
a power lever connected to the connecting sleeve;
a hook cylinder having an upper end inserted into the connecting sleeve; and
a cutting hook connected to a side of the hook cylinder;
wherein a full-length opening is vertically formed on a side wall of the hook cylinder; an upper end of the hook cylinder is detachably connected to the connecting sleeve, and an arc slot perpendicular to the full-length opening is provided on a side of a lower end of the hook cylinder; and a plurality of teeth are arranged on a lower end surface of the hook cylinder along a circumferential direction;
a cross section of the hook cylinder at both sides of the opening on the side wall is an arc surface; the cross section of the hook cylinder is fitted with a circular cross section of a connecting rod of the cutting hook; a radian of the cross section of the hook cylinder is consistent with a radian of an arc of an outer wall of the connecting rod of the cutting hook;
the connecting sleeve is a funnel-shaped cylinder which comprises a cylindrical upper portion, a conical connecting portion and a cylindrical lower portion;
a set of clamping slots are provided on an inner side surface, corresponding to an opening of the hook cylinder, of an upper portion of the connecting sleeve; the clamping slots are configured to clamp a handle of the cutting hook; an included angle between the clamping slots is 10-25 degrees; and
a pair of bolt holes is symmetrically provided on a side wall of the upper portion of the connecting sleeve; a plurality of bolts for rotating the connecting sleeve are arranged in the bolt holes.

### Claim 2 (depends on 1)

The corer of claim 1, wherein adjacent teeth on the hook cylinder are staggered.

### Claim 3 (depends on 1)

The corer of claim 1, wherein the upper end of the hook cylinder is inserted into a lower portion of the connecting sleeve and fastened through a fastener; and a plurality of through holes spaced apart are arranged on an upper opening of the hook cylinder along a circumferential direction and penetrate through the fastener.

### Claim 4 (depends on 1)

The corer of claim 1, wherein the cutting hook comprises:
the handle clamped in the connecting sleeve;
the connecting rod passing through the connecting sleeve and the full-length opening on the side wall of the hook cylinder; and
a tip clamped in the arc slot on the lower end of the hook cylinder;
a tip body of the tip is an arc; an end portion of the tip is a barb-shaped cutting edge; a bending radian of the tip body is consistent with the radian of the arc slot.

### Claim 5 (depends on 4)

The corer of claim 4, wherein tangent of a joint between the tip body of the cutting hook and the connecting rod is perpendicular to the handle.

### Claim 6 (depends on 1)

The corer of claim 1, wherein a plurality of connecting holes spaced apart are horizontally arranged on a lower portion of the connecting sleeve along a circumferential direction and penetrate through a fastener;
a through slot passing through the cutting hook is vertically provided on the side wall of the lower portion, corresponding to the opening of the hook cylinder;
an annular slot is provided at a lower opening of the lower portion of the connecting sleeve along a circumferential direction; the hook cylinder is inserted into the annular slot; a width of the annular slot is adapted to a wall thickness of the hook cylinder; and
a middle of the lower portion of the connecting sleeve is in a threaded connection with a power lever.