Apparatus for dosage control
First Claim
1. An apparatus for controlling dosage rates of at least one treatment solution, the apparatus comprising:
- a valve housing surrounding an interior chamber, the valve housing having a first and second port, each port having an opening establishing communication with the interior chamber;
a core located within the interior chamber, the core comprising magnetic material;
a first magnet associated with the first port; and
a first coil, the first coil operable to induce an electromagnetic field of sufficient strength to move the core from the first magnet.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention is directed to a dose control apparatus for manipulating the dosage of one or more pharmaceutical solutions emanating from an implantable drug infusion pump. The dose control apparatus has a movable core that is held in a desired position by a magnet. The apparatus has at least one coil that, when activated, motivates the core to move to a new position. The core may be held in the second position by another magnet. The apparatus may have more that one coil provide various control options. In addition, the coils may be used to determine core position or the presence and strength of an externally applied magnetic field such as that produced in an MRI. The coils may also be used to produce a magnetic field counteracting the externally applied field or to produce a degaussing field.
39 Citations
25 Claims
-
1. An apparatus for controlling dosage rates of at least one treatment solution, the apparatus comprising:
-
a valve housing surrounding an interior chamber, the valve housing having a first and second port, each port having an opening establishing communication with the interior chamber;
a core located within the interior chamber, the core comprising magnetic material;
a first magnet associated with the first port; and
a first coil, the first coil operable to induce an electromagnetic field of sufficient strength to move the core from the first magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An apparatus for controlling dosage rates of at least one treatment solution, the apparatus comprising:
-
a valve housing surrounding an interior chamber, the valve housing having a first and second port, each port having an opening establishing communication with the interior chamber;
a core located within the interior chamber, the core comprising magnetic material, the core operable to alternately form a seal with a valve seat associated with the first port or a valve seat associated with the second port;
a first magnet associated with the first port;
a second magnet associated with the second port;
a first coil associated with the first port, the first coil operable to induce an electromagnetic field of sufficient strength to move the core from the second magnet; and
a second coil associated with the second port;
the second coil operable to induce an electromagnetic field of sufficient strength to move the core from the first magnet. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
-
21. A method for controlling dosage rates of at least one treatment solution, method comprising:
inducing a magnetic field using a coil, the magnetic field motivating a core from the influence of a first magnet associated with a first valve seat to the influence of a second magnet associated with a second valve seat. - View Dependent Claims (22, 23, 24, 25)
Specification