# US 8,740,118 B2 · Portable grinding device

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- Number: US 8,740,118 B2
- Document ID: US8740118B2
- Status: Granted
- Kind: B2
- Application number: 13/311,598
- Filed: 2011-12-06
- Published: 2013-01-10
- Granted: 2014-06-03
- Earliest claimed: 2011-07-07
- Assignees: Rega Biotechnology Inc.
- Applicants: Shih-Hung Kuo; Bruce Lai
- Inventors: Shih-Hung Kuo; Bruce Lai
- Web page: https://patentgrep.com/patent/US8740118B2

## CPC

- B02C 19/08: Pestle and mortar
- B01F 33/251: {using balls as loose mixing element}
- B01F 35/32021: {Shaking by hand a portable receptacle or stirrer for mixing}
- G01N 1/286: {involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising (microtomes G01N1/06; pulverising in general B02C; mixing in general B01F)}
- G01N 2001/2866: {Grinding or homogeneising}
- B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02})
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A grinding device, comprising a body configured as a hollow barrel having an opening and a first fixing element positioned close to the opening; an inner cap configured to mount to an inner wall of an end close to the opening of the body having a second fixing element corresponding to the first fixing element; wherein an aperture is provided on the inner cap, and a first leak-proof seal is configured to surround the aperture; an outer cover having a second leak-proof seal, wherein the second leak-proof seal engages the first leak-proof seal for leak-proofing; and a grinding element positioned inside the body and capable of moving therein freely; wherein an area of any cross section of the grinding element is bigger than the aperture of the inner cap.

## Claims

### Claim 1

A grinding device, comprising:
a body configured as a hollow barrel having an opening, a first fixing element positioned close to said opening, and an external thread configured on an outer wall of an end close to said opening of said body;
an inner cap configured to mount to an inner wall of an end close to said opening of said body having a second fixing element corresponding to said first fixing element; wherein said second fixing element is configured to anchor with said first fixing element; wherein an aperture is provided on said inner cap, and a first leak-proof seal is configured to surround said aperture;
an outer cover having an inner thread, a second leak-proof seal and a projection; wherein said inner thread is configured to lock with said external thread of said body, and thereby said second leak-proof seal is made joint said first leak-proof seal for leak-proofing; and
a grinding element positioned inside said body and capable of moving therein freely; wherein an area of any cross section of said grinding element is bigger than said aperture of said inner cap.

### Claim 2 (depends on 1)

The device according to claim 1, wherein said body is configured as a hollow drum, and said grinding element is a ball.

### Claim 3 (depends on 1)

The device according to claim 1, wherein said first fixing element is a clasp portion, and said second fixing element is a clasp engaging portion.

### Claim 4 (depends on 1)

The device according to claim 1, wherein said first fixing element is an inner thread, and said second fixing element is an external thread.

### Claim 5 (depends on 1)

The device according to claim 1, wherein a gasket ring is further configured at a site where said body and said inner cap are anchored with each other.

### Claim 6 (depends on 1)

The device according to claim 1, wherein said first leak-proof seal is a convex part, and said second leak-proof seal is a pad.

### Claim 7 (depends on 1)

The device according to claim 1, wherein said first leak-proof seal is a pad, and said second leak-proof seal is a convex part.

### Claim 8 (depends on 1)

The device according to claim 1, wherein a bottom of said body has a central recess, and an inner surface of said central recess substantially matches with an outer surface of said grinding element.