1. A flush mechanism for a toilet comprising:
a rotatable flush valve;
a drive mechanism operatively connected to the flush valve;
a motor to move the drive mechanism; and,
a spring operatively connected to the drive mechanism to bias the drive mechanism in a direction so as to rotate the flush valve.
2. The flush mechanism of claim 1, wherein the spring biases the drive mechanism in a direction so as to rotate the flush valve to an open position.
3. The flush mechanism of claim 2 further comprising a drive arm slot located at an end of the drive mechanism.
4. The flush mechanism of claim 3 further comprising a motor arm operatively connected to the motor to engage the drive arm slot to thereby move the drive mechanism in a direction so as to rotate the flush valve to a closed position.
5. The flush mechanism of claim 1, wherein the spring biases the drive mechanism in a direction so as to rotate the flush valve to a closed position.
6. The flush mechanism of claim 5 further comprising a drive arm slot located at an end of the drive mechanism.
7. The flush mechanism of claim 6 further comprising a motor arm operatively connected to the motor to engage the drive arm slot to thereby move the drive mechanism in a direction so as to rotate the flush valve to an open position.
8. The flush mechanism of claim 1 further comprising a flushadd water switch to energize the motor and a water inlet valve for a limited period of time.
9. The flush mechanism of claim 8 further comprising a cam switch to energize the motor and the water inlet valve after initial energization by the flushadd water switch.
10. The flush mechanism of claim 1 further comprising a power boost bar operatively connected to the drive mechanism.
11. The flush mechanism of claim 10 further comprising a projection operatively attached to the motor arm to contact the power boost bar to move the drive mechanism in a direction so as to rotate the flush valve.
12. The flush mechanism of claim 1 further comprising a flush rod operatively connected to the motor arm to operate the flush mechanism manually.
13. A flush mechanism for a toilet comprising:
a frame;
a support structure operatively connected to the frame;
a rotatable flush valve positioned in the support structure;
a rotor shaft operatively connected to the flush valve;
a rotor cam coupled to the rotor shaft;
a drive arm operatively connected to the rotor cam at a first end and to the frame at a second end;
a motor to move the drive arm; and,
a spring operatively connected to the frame at one end and to the rotor cam at the opposite end to bias the drive arm in a direction so as to rotate the flush valve.
14. The flush mechanism of claim 13, wherein the flush valve rotates to an open position.
15. The flush mechanism of claim 14, wherein the motor moves the drive arm in a direction so as to rotate the flush valve to a closed position.
16. The flush mechanism of claim 13, wherein the flush valve rotates to an closed position.
17. The flush mechanism of claim 16, wherein the motor moves the drive arm in a direction so as to rotate the flush valve to a closed position.
18. A method of flushing a toilet comprising the steps of:
activating an actuating mechanism;
activating a flushadd water switch;
energizing a motor and a water inlet valve;
disengaging a motor arm from a drive arm slot;
biasing a drive mechanism in a direction so as to rotate a flush valve; and,
re-engaging the motor arm in the drive slot so as to rotate the flush valve to in an opposite direction.
19. The method of claim 18, wherein during the step of biasing a drive mechanism in a direction so as to rotate a flush valve to an open position the method further comprising the steps of:
deactivating the flushadd water switch; and,
activating a cam switch to energize the motor and water inlet valve.
20. The method of claim 19 further comprising the steps of:
providing a power boost bar operatively connected to the drive mechanism and a projection operatively connected to the motor arm;
wherein prior to the step of re-engaging the motor arm in the drive slot so as to rotate the flush valve the method further comprising the step of:
contacting the projection to the power boost bar to drive the drive mechanism a direction so as to rotate the flush valve in the same direction.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A magneto rheological fluid comprising magnetic particles, a dispersing medium and polyethyleneoxide as a viscosity modifier, said polyethyleneoxide being contained in an amount of 0.5 to 5% by weight based on the weight of the magnetic particles.
2. A magneto rheological fluid according to claim 1, further comprising at least one additive selected from the group consisting of hydrogenated castor oils, amide waxes, montmorillonite and bentonite.
3. A magneto rheological fluid according to claim 1, wherein said magnetic particles are at least one kind of particles selected from the group consisting of alloy particles containing at least two elements selected from the group consisting of iron, cobalt and nickel; metal compound particles containing at least one element selected from the group consisting of iron, cobalt and nickel; iron particles; iron nitride particles; iron carbide particles; carbonyl iron particles; ferrite particles; and magnetite particles.
4. A magneto rheological fluid according to claim 1, wherein said dispersing medium is a hydrocarbon-based solvent, a glycol-based solvent or a silicone-based solvent.
5. A magneto rheological fluid according to claim 1, wherein said magneto rheological fluid has a thixotropy index of not less than 5.
6. A magneto rheological fluid according to claim 1, wherein a content of the magnetic particles in the dispersing medium is in the range of 15 to 40% by volume, and an amount of the polyethyleneoxide blended is in the range of 0.5 to 3% by weight based on the weight of the magnetic particles.
7. A magneto rheological fluid according to claim 1, wherein said magneto rheological fluid contains a surfactant or a higher-fatty acid.
8. A magneto rheological fluid according to claim 1, wherein said magnetic particles contain fine magnetic particles having an average particle diameter of 5 to 15 nm and magnetic particles having an average particle diameter of 0.3 to 10 \u03bcm, and a blending weight ratio of the fine magnetic particles to the magnetic particles is in the range of 0.8:100 to 15:100.
9. A magneto rheological fluid according to claim 8, wherein the fine magnetic particles have an average particle diameter of 7 to 10 nm and the magnetic particles have an average particle diameter of 0.4 to 5 \u03bcm, and a blending weight ratio of the fine magnetic particles to the magnetic particles is in the range of 1:100 to 10:100.
10. A magneto rheological fluid according to claim 1, wherein said magneto rheological fluid further contains metal oxide particles having an average particle diameter of 2 to 50 nm, said magnetic particles have an average particle diameter of 0.1 to 10 \u03bcm, and a blending weight ratio of the metal oxide particles to the magnetic particles is in the range of 0.8:100 to 15:100.
11. A magneto rheological fluid according to claim 10, wherein said metal oxide particles are selected from the group consisting of silica particles, alumina particles and titanium oxide particles.
12. A magneto rheological fluid according to claim 10, wherein said magnetic particles have an average particle diameter of 0.3 to 5 \u03bcm, said metal oxide particles have an average particle diameter of 5 to 50 nm, and a blending weight ratio of the metal oxide particles to the magnetic particles is in the range of 0.8:100 to 10:100.
13. A magneto rheological fluid according to claim 1, wherein said magnetic particles are composite magnetic particles comprising magnetic particles having an average particle diameter of 0.3 to 10 \u03bcm, and fine inorganic particles covering surface of the respective magnetic particles and having an average primary particle diameter of 5 to 20 nm, and a blending weight ratio of the fine inorganic particles to the magnetic particles is in the range of 0.8:100 to 15:100.
14. A magneto rheological fluid according to claim 13, wherein said fine inorganic particles are composed of iron oxide.
15. A magneto rheological fluid according to claim 13, wherein said fine inorganic particles are selected from the group consisting of silica particles, alumina particles and titanium oxide particles.
16. A magneto rheological fluid according to claim 13, wherein said composite magnetic particles have an average particle size of 0.3 to 10 \u03bcm, said fine inorganic particles have an average primary particle diameter of 5 to 15 nm, and a ratio of a thickness of a coating layer composed of the fine inorganic particles to a diameter of the respective magnetic particles as core particles is in the range of 5:10000 to 20:100.