Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Reexamination Certificate
1999-10-08
2001-01-30
Leung, Philip H. (Department: 3742)
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
C219S389000, C219S754000, C126S338000, C108S020000, C099S44300R
Reexamination Certificate
active
06180923
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to ovens and more particularly to an oven with a mechanism that can spin automatically without a motor.
Ovens are becoming very popular in cooking due to its convenience and relative cheap price to micro-ovens. It is also safer, free from fearing that microwave causes harm to our bodies. Because conventional ovens don't have spinning tray, food usually get cooked unevenly, some parts are fully cooked while others may still be raw or half-cooked. Even though some improved ovens have spinning tray provided with a motor underneath, but it is expensive and the motor may get broken very easily.
SUMMARY OF THE PRESENT INVENTION
The present invention of a spinning tray for oven mainly comprising a tray body, a spinning mechanism, a bottom box and a bottom tray. The spinning tray is for holding food, having a hole at the center for inserting a sensor rod with a spring coil underneath. A positioning frame is disposed outside the spring coil and underneath the tray body. A lower board of the positioning frame is provided for defining the spring when it is compressed. The sensor rod having a L-shaped stopping bar extended therefrom. The spinning mechanism comprising a positioning board. The tray body having few stand poles protruded from underneath for screwing the positioning board. A main axle penetrates through the positioning board on a preset location. The main axle having a spring around and a gearing sleeved on it, so that the main axle can engage with the gearing by the elasticity of the spring, the gearing is also engaged to few gear sets to spin a spinning blade. The whole spinning mechanism is covered by a cover and is fixed by screwing on the positioning board. The bottom box is for placing the spinning mechanism between itself and the tray body. The bottom box having an axial hole at the center for the main axle of the spinning mechanism to go through. Heat insulation material is provided inside the bottom box and the tray body. The bottom box and the tray body are fixed together in a way that they spin in the same pace. The bottom tray is a plate-liked body with a screw hole on its top for screwing the end of the main axle of the spinning mechanism. Accordingly, spin the bottom tray together with the main axle so that the spring is winded. When the sensor rod on the tray body is pressed by food, the stopping bar moves downwards away from the spinning blade, so that the spring creates elasticity to spin the spinning mechanism and the tray body while the main axle and the bottom tray remain motionless. When the food is taken away from the tray body to release the sensor rod from pressure and returns to its original position, the stopping bar rises up to stop the spinning blade from moving, so that the spinning mechanism is motionless too. Thus the present invention of a spinning tray for oven can spin automatically when food is placed on top without a motor or electricity, food can also be cooked evenly.
The present invention will become more fully understood from the following detailed description when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 4239009 (1980-12-01), Cunningham
patent: 4254319 (1981-03-01), Beh et al.
patent: 4523070 (1985-06-01), Jorgensen et al.
patent: 5667714 (1997-09-01), Cho
patent: 5672291 (1997-09-01), Han
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