# US 8,464,705 B2 · Cooking device

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- Number: US 8,464,705 B2
- Document ID: US8464705B2
- Status: Granted
- Kind: B2
- Application number: 12/376,262
- Filed: 2007-07-09
- Published: 2010-01-14
- Granted: 2013-06-18
- Earliest claimed: 2006-08-04
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Hiroki Kitayama; Masahiro Nishijima; Takeyuki Ozaki
- Inventors: Hiroki Kitayama; Masahiro Nishijima; Takeyuki Ozaki
- Web page: https://patentgrep.com/patent/US8464705B2

## CPC

- F24C 15/023: {Mounting of doors, e.g. hinges, counterbalancing}
- F24C: DOMESTIC STOVES OR RANGES (exclusively for solid fuels F24B); DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION

## Abstract

An open/close adjustment device is connected to the door of a heating chamber of a cooking device, and the open/close adjustment device pulls the door back to its totally closed position. The open/close adjustment device adjusts an operation force when the door is passing a predetermined open angle. The operation force indicates a maximum value when the door is passing the predetermined open angle, and the maximum value is given by two protrusions disposed at front-side and rear-side with distance between them. Each of the protrusions each produces a load when they go over a support member, and a following one of the two protrusions produces a load larger than a load firstly produced by a preceding one of the two protrusions when the door is opened.

## Claims

### Claim 1

A cooking device which heats a food in a heating chamber with a heating medium, an opening of the heating chamber is closed with a door which swings around a horizontal pivot shaft disposed in a lower portion of the cabinet, the cooking device is characterized in that an open/close adjustment device which connects the cabinet and the door with each other and adjusts an operation force needed to open or to close the door, the operation force indicates a maximum value when the door is passing a predetermined angle, the maximum value is given by two protrusions disposed at front-side and rear-side with a distance between them, the protrusions each produce a load when they go over a support member, and a following one of the two protrusions produces a load larger than a load firstly produced by a preceding one of the two protrusions when the door is opened, and inclinations of both sides of the two protrusions are adjusted such that a larger load is produced when the door is opened than when the door is closed and a following one of the two protrusions produces a load smaller than a load firstly produced by a preceding one of the two protrusions when the door is closed, thereby producing a larger operation force needed to open the door than is needed to close the door.

### Claim 2 (depends on 1)

The cooking device according to claim 1, wherein the open/close adjustment device exerts on the door a bias urging it toward the totally closed position.

### Claim 3 (depends on 2)

The cooking device according to claim 2, wherein the open/close adjustment device includes: a link one end of which is connected to the door at a position higher than the open/close fulcrum of the door, and the other end of which is a free end; a support member which supports the link from beneath at a fixed position; a spring which is disposed between the link and a fixed member and exerts on the link a force that presses the link against the support member and a force that causes the link to pull the door back to the totally closed position; and the protrusions are formed on a lower surface of the link.

### Claim 4 (depends on 3)

The cooking device according to claim 3, wherein the spring is a single tension coil spring that is mounted across the free end of the link and the fixed member.

### Claim 5 (depends on 1)

The cooking device according to claim 1, wherein the support member is a wheel-shaped rotor.