Delivery apparatus with pressure controlled delivery
First Claim
1. A delivery apparatus for delivering a stored medium from a variable volume delivery device in which mechanical actuating means are provided for expelling the stored medium from the delivery device through a delivery tip at one end thereof, said delivery apparatus comprising:
- fixture means for receiving and positioning said delivery device;
said fixture means including force generating and application means for applying an actuating force to said mechanical actuating means of said delivery device to subject the stored medium in said variable volume chamber to a pressure for the expulsion of said medium from said chamber through said delivery tip;
said fixture means further including an opening therein for receiving said delivery tip and positioning the same for connection to a use application;
pressure sensing means for sensing and generating a signal proportional to the magnitude of the pressure in said medium resulting from the force applied by said force generating and application means;
reference pressure generating means for generating a reference pressure signal representing a preselected desired reference pressure magnitude for the pressure in said medium resulting from the actuating force applied by said applicator means;
comparator means for comparing the signal generated by said pressure sensing means with said reference pressure signal and for generating a difference signal proportional to the difference between the signal generated by said pressure sensing means and said reference pressure signal;
control means for controlling the magnitude of the force applied by said applicator means; and
means connecting said difference signal to said control means for controlling the magnitude of the force applied by said applicator means in a direction to reduce the magnitude of said difference signal to zero, whereby said applied force is automatically regulated to maintain a pressure in said medium at the level represented by said reference pressure signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A delivery apparatus for delivering various media, such as medical and/or pharmaceutical media or the like, from a delivery device, such as a syringe, in which the delivery pressure of the medium as it is dispensed from the delivery device is automatically maintained and regulated at a preselected level throughout delivery of the medium from the delivery apparatus. In one embodiment, the skin temperature of the patient is also sensed and the pressure of the medium being administered to the patient is further adjusted in response to the sensed skin temperature.
-
Citations
10 Claims
-
1. A delivery apparatus for delivering a stored medium from a variable volume delivery device in which mechanical actuating means are provided for expelling the stored medium from the delivery device through a delivery tip at one end thereof, said delivery apparatus comprising:
-
fixture means for receiving and positioning said delivery device; said fixture means including force generating and application means for applying an actuating force to said mechanical actuating means of said delivery device to subject the stored medium in said variable volume chamber to a pressure for the expulsion of said medium from said chamber through said delivery tip; said fixture means further including an opening therein for receiving said delivery tip and positioning the same for connection to a use application; pressure sensing means for sensing and generating a signal proportional to the magnitude of the pressure in said medium resulting from the force applied by said force generating and application means; reference pressure generating means for generating a reference pressure signal representing a preselected desired reference pressure magnitude for the pressure in said medium resulting from the actuating force applied by said applicator means; comparator means for comparing the signal generated by said pressure sensing means with said reference pressure signal and for generating a difference signal proportional to the difference between the signal generated by said pressure sensing means and said reference pressure signal; control means for controlling the magnitude of the force applied by said applicator means; and means connecting said difference signal to said control means for controlling the magnitude of the force applied by said applicator means in a direction to reduce the magnitude of said difference signal to zero, whereby said applied force is automatically regulated to maintain a pressure in said medium at the level represented by said reference pressure signal. - View Dependent Claims (2, 3, 4, 5, 7, 10)
-
-
6. A delivery apparatus for delivering a stored medium from a variable volume delivery device in which mechanical actuating means are provided for expelling the stored medium from the delivery device through a delivery opening thereof, said delivery apparatus comprising:
-
a delivery device having a variable volume chamber for storing a medium to be delivered from said delivery device; a delivery opening connected to said variable volume chamber through which said stored medium is expelled; said delivery device including actuating means for varying the volume of said chamber to expel the stored medium from said variable volume chamber through said delivery opening; fixture means for receiving said delivery device; said fixture means including force generating and application means for applying an actuating force to said actuating means of said delivery device, whereby the stored medium in said variable volume chamber is subjected to a pressure for the expulsion of said medium from said chamber through said opening; pressure sensing means for sensing and generating a signal proportional to the magnitude of the pressure in said medium resulting from the force applied by said force generating and application means; reference pressure generating means for generating a reference pressure signal representing a preselected desired pressure magnitude in said medium resulting from the actuating force applied by said applicator means; comparator means for comparing the signal generated by said pressure sensing means with said reference pressure signal and for generating a difference signal proportional to the difference between the signal generated by said pressure sensing means and said reference pressure signal; control means for controlling the magnitude of the force applied by said applicator means; and means connecting said difference signal to said control means for controlling the magnitude of the force applied by said applicator means in a direction to reduce the magnitude of said difference signal to zero, whereby said applied force is automatically regulated to maintain a pressure in said medium at the level represented by said reference pressure signal. - View Dependent Claims (8, 9)
-
Specification