It is an egg-beater (or egg-whisk), particularly, an automatic egg-beater, which comprises a cylindrical handle on the upper half portion; the top of the cylindrical handle is mounted with a 16-side (or 16-polygonal) cap; the feature of the rotary cap not only can prevent from being slippery upon rotating it by hand, but also can prevent from rolling away upon placing it on a flat surface. The cap is connected to an inner cylinder which is sleeved inside the cylindrical handle. A motor being fixed on a base is mounted in the inner cylinder. The center rod of the agitator and the lower end of the motor spindle are connected together by means of a fan blade assembly. The bottom of the cylindrical handle is substantially a round base with several concentric round grooves for fitting containers or cups with different diameters. Upon pressing the top switch on the handle, the motor will drive the agitator to rotate at a high speed to agitate the egg liquid in the container. The height of the agitator may be adjusted so as to fit the size of the container and to fit the amount of egg liquid in the container for fully utilizing the agitating power.

BACKGROUND OF THE INVENTION 
Most of the conventional egg-beaters or egg-whisks are made of a plurality 
of wires, being operated in a container that has a large opening (such as 
a soup pot or a large bowl). A user usually has to hold the agitator with 
one hand to beat the eggs until the egg liquid is likely to become 
homogeneous; however, it takes time and manpower to operate the 
conventional egg-beater without obtaining a thoroughly homogeneous egg 
liquid. There are also the electrical egg-beaters, comprising two 
agitators, each of which includes two sets of "c" shaped frames being 
mounted oppositely around a center rod. However, those electrical 
egg-beaters also have the following drawbacks: 
(1) Too noisy. 
(2) To be held with hand. 
(3) Used with a container with a large opening. 
(4) Inconvenient to clean it. 
(5) Too heavy to handle. 
(6) Unable to agitate a small amount of egg liquid. 
(7) Having a large dimensions and taking a lot of room to set up; moreover, 
it is still unable to provide a fully automatic agitation. 
SUMMARY OF THE INVENTION 
In view of the drawbacks of the conventional egg-beaters, the inventor has 
developed the present invention, "An automatic egg-beater". The prime 
feature is that a cylindrical handle is mounted on the upper half portion 
of the beating machine. The top of the machine is covered with a rotary 
16-polygonal cap which can to be turned manually without slipping and 
which will not roll on a flat surface. The lower portion of the rotary cap 
is furnished with a flange so as to be engaged with a channel on the inner 
wall of the cylindrical handle and to have the inner cylinder and the 
cylindrical handle fastened together (the cap and the inner cylinder are 
substantially integrated). A motor mounted on a motor base is mounted 
inside the inner cylinder. The center rod of the agitator and the lower 
end of the motor spindle are connected together by means of a fan blade 
assembly. The bottom side of the cylindrical handle has several concentric 
round grooves for holding a number of containers or cups having 
corresponding diameters. Upon pressing the top switch with a finger, the 
convex-shaped disc mounted under the lower end of the agitator will be 
driven to rotate at a high speed by the motor so as to beat the egg liquid 
in the container. The position of the agitator can be adjusted so as to 
adapt to the containers with different sizes, and to adapt to the 
different depths of the egg liquid to obtain better homogeneous egg 
liquid. 
Another feature of the present invention is that, under the base of the 
cylindrical handle, several concentric round grooves are provided so as to 
hold the containers of different sizes, and to prevent the egg liquid from 
overflow during the agitation. One side of the cylindrical handle base has 
a cut portion to be fitted with the outlet of a container. After the 
beating process, the machine and the container can be cleaned and 
assembled together again so as to prevent the agitator from being 
polluted, and to save storage space as well. 
Still another feature of the present invention is that the rotary cap is 
mounted with a wire socket for connecting the power line, i.e., the socket 
and the power line can be separated from each other after the agitation so 
as to facilitate the agitator being directly put under a water faucet to 
wash for time-saving and convenience purposes. 
A further feature of the present invention is that the top of the rotary 
cap is mounted with a retainer and a pressing cap. In case of requiring 
longer time of agitation, set the pressing cap, by turning the retainer, 
on the switch so as to press the switch in a normal "ON" condition and to 
have the agitator run continuously without holding the cap and with a hand 
or the switch with a thumb. To stop the agitation, turn the pressing cap 
of the retainter away from the switch, and the switch will be turned off 
to stop the motor. 
A still further feature of the present invention is that the motor base is 
furnished with two studs to be engaged in the double coil groove and in 
the two vertical slots on the inner cylinder. Upon rotating the inner 
cylinder, the motor base will move up and down along the coil groove. 
Simultaneously, the agitator will also move up and down. This feature can 
render the machine to fit the containers with different sizes and to 
agitate the egg liquid at different depths. Therefore, it is deemed a new 
agitator. 
Yet another feature of the present invention is that a fan blade assembly 
made of plastic material is mounted between the agitator and the motor 
spindle, and all three members rotate synchronously. During agitation, the 
motor beat can be dissipated simultaneously so as to increase the 
serviceable life of the motor. 
Yet a further feature of the present invention is that the bottom portion 
of the agitator is mounted with a convex-shaped disc being furnished with 
a plurality of the upper and lower ribs, and with a number of vertical 
agitating studs. When the agitator is driven by the motor, the ribs and 
the agitating studs will be rotated at a high speed to generate a 
whirlpool in the agitated egg without making noise.

DETAILED DESCRIPTION 
Referring to FIG. 1, it shows a disassembled view of the present invention, 
of which the upper portion is mounted with a cylindrical handle 1 with a 
coil groove 4 furnished on the inner wall and with a round base 12 on the 
bottom portion. Underneath the base 12 surface, several concentric round 
grooves 13 are furnished so as to fit several containers with different 
opening diameters. On one side of the base 12, there is a cut portion 14 
which can coincide with the outlet of a container to be used together with 
the machine. The center of the base 12 has a round hole 15 for receiving 
the center rod 51 of the agitator 5. The base 12 is also furnished with a 
small hole 16 for ventilation and adding flavorings. The inner cylinder 2 
is sleeved in the cylindrical handle 1. The top of the inner cylinder 2 is 
furnished with a rotary cap 3, of which the center is provided with two 
round holes 31 and 32 for mounting a retainter 6 in hole 31 and a switch 7 
in hole 32 respectively. 
The retainer 6 is rotatable, and has a pressing cap 61 that is mounted on 
the switch 7. The top edge portion of the rotary cap 3 is furnished with a 
plurality of small holes 33, wherein a number of pearls can be embedded 
for decorating purpose. The circumference of the rotary cap 3 is provided 
with polygonal surfaces, which can facilitate the user to rotate, and can 
prevent the rotary cap from rolling away upon being placed on a flat 
surface, and also can render a beautiful outer shape. The side wall of the 
rotary cap 3 is furnished with a socket hole 34 for mounting a socket 35; 
a part of the socket 35 extends out of the socket hole so as to be fixed 
in place with a collar 36, and to let a plug to be plugged in the socket. 
The side wall of the rotary cap 3 is furnished with four ventilating holes 
37 (only one is shown) to dissipate heat. The lower portion of the cap 3 
is furnished with a flange 20, which is used to connect to the inner 
cylinder 2, and to embed into the channel 19 on the inner wall of the 
cylindrical handle 1 in a rotating manner. The wall of the inner cylinder 
2 is furnished with two sets of symmetrical notches 21 and 22 for 
receiving two studs 81 on the motor base 8 so as to limit the displacement 
of motor base 8. The inner cylinder 2 is furnished with two vertical slots 
23 on the opposite side thereof so as to let the two studs 81 slide up and 
down. The motor 9 is mounted on the motor base 8 with screws 10. One end 
of the motor spindle 91 is mounted in the spindle hole 112 of the fan 
blade assembly 11. The motor base 8 has two studs 81 on the circumference 
thereof, and has two ventilating slots 82 arranged symmetrically for 
facilitating the fan blade assembly 11 to dissipate heat. The upper end of 
the center rod 51 of the agitator 5 is closely sleeved on the round stub 
11 of the fan blades assembly 11. The lower end of the center rod 51 is 
connected with a convex-shaped disc 52, which comprises a plurality of the 
upper ribs 53 and the lower ribs 531, and three vertical agitating studs 
54. 
FIG. 2 illustrates a sectional view of the present invention, in which the 
motor 9 is fixedly mounted on the motor base 8, and both of them are 
installed in the inner cylinder 2; the agitator 5 is connected to the 
round stub 111 of the fan blades assembly 11. Upon setting the pressing 
cap 61 of the retainer 6 by hand, on the top of the switch 7, the switch 
will be in the normal "ON" condition to cause the motor 9 to drive the 
convex-shaped disc 52 of the agitator 5 to rotate at a high speed. By 
means of the ribs 53 and 531 and the agitating studs 54, the egg liquid 
will be agitated in a homogeneous condition. 
FIG. 3 is a fragmental of a sectional view of one embodiment of the present 
invention, in which the container 17 is closely mounted in one of the 
concentric round grooves 13. The agitator 5 can be set at a suitable 
position level in accordance with the amount of the egg liquid to be 
agitated. For example, if there is only one egg in the container 17, the 
agitator 5 should be set near the bottom of the container 5. Upon the 
power cord being plugged into the socket 35, press down the switch 7 to 
start the motor and the agitator 5. If only a short period of time 
(several seconds) is required to agitate, just push the switch 7 with a 
finger. In case of requiring longer time of agitation, set the pressing 
cap 61 of the retainer 6 on to the switch 7 for continuous operation for a 
period of time required. To stop the agitation, just remove the pressing 
cap 61 away from the switch 7, and the switch will automatically be turned 
off to stop the motor 9. 
FIG. 4 illustrates another embodiment of the present invention, in which 
the bottom of the base 12 is mounted on a large container 17 that has a 
projected outlet 18 engaged with the cut portion 14 of the base 12. If the 
container 17 is loaded with a large quantity of egg liquid, or the 
container has a lower height, turn the rotary cap 3 to have the motor base 
8 moved upwards along the coil groove 4, and also to cause the agitator 5 
to move upwards until a suitable level in the container is reached for 
better agitation. Upon the studs 81 of the motor base 8 moving upwards and 
being engaged with the notches 21, the motor base 8 is lifted to its 
highest level. On the contrary, if there is only a small amount of egg 
liquid or the container is short, the motor base 8 may be lowered until 
the studs 81 is engaged into notches 22, i.e., the lowest level of the 
motor base 8; in other words, the position of the motor base 8 can be 
adjusted between the two sets of notches 21 and 22. To operate the whisk, 
just hold the handle 1 with one handle and press the switch 7 with a 
thumb; that way of operation is conforming to the principle of human 
engineering. The container can be replaced with any suitable size and 
desired diameter. After the power cord is removed from the socket, the 
agitator 5 can be put under a water faucet to wash directly. 
Briefly, the present invention not only can use different sized containers, 
but also can be operated automatically without being held with hand or 
attended by a person. Further, the position of the agitator can be 
adjusted, if necessary, therefore, the present invention is deemed a 
desirable apparatus in assisting the housewives in cooking.