Syringe Pump
First Claim
1. A method for automatically dispensing liquid from a syringe, the syringe including a syringe body and a plunger element, the plunger element being displaceable within the syringe body, the method comprising:
- (a) providing a displacement mechanism including a plunger-handle mechanically linked to a fluid containment chamber such that a position of said plunger-handle varies as a function of a volume of a fluid within said fluid containment chamber;
(b) mechanically linking said plunger-handle and the plunger element such that displacement of said plunger-handle results in the plunger element being displaced into the syringe body;
(c) pressurizing fluid in said fluid containment chamber; and
(d) regulating a flow of said fluid out of said fluid containment chamber using a flow regulator such that said plunger-handle is displaced at a given rate.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention is an adjustable re-usable syringe actuator that delivers liquid at a substantially constant rate that is unaffected by a change in the viscosity of the liquid being pumped. The disposable syringe actuator is well suited for the infusion of small to medium volumes of liquid medication at low flow-rates. A preferred embodiment includes a purely mechanical device with no need for electricity, thereby providing a high level of patient mobility. The spring-powered device uses a variable length elongated flow regulation passageway to regulate the rate at which the spring depresses the syringe plunger. Thus, the rate of medication infusion is regulated by varying the length of the flow regulation passageway.
237 Citations
19 Claims
-
1. A method for automatically dispensing liquid from a syringe, the syringe including a syringe body and a plunger element, the plunger element being displaceable within the syringe body, the method comprising:
-
(a) providing a displacement mechanism including a plunger-handle mechanically linked to a fluid containment chamber such that a position of said plunger-handle varies as a function of a volume of a fluid within said fluid containment chamber;
(b) mechanically linking said plunger-handle and the plunger element such that displacement of said plunger-handle results in the plunger element being displaced into the syringe body;
(c) pressurizing fluid in said fluid containment chamber; and
(d) regulating a flow of said fluid out of said fluid containment chamber using a flow regulator such that said plunger-handle is displaced at a given rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A syringe actuator for displacing a plunger element into a syringe body, the syringe actuator comprising;
-
(a) a fluid containment chamber;
(b) a flow regulator in fluid communication with said fluid containment chamber, said flow regulator being configured so as to regulate a flow of fluid flowing out of said fluid containment chamber;
(c) a displaceable plunger-handle configured such that a position of said plunger-handle varies as a function of a volume of said fluid within said fluid containment chamber; and
(d) a syringe-holding element mechanically linked to said displaceable plunger-handle, said syringe-holding element configured so as to hold the syringe such that as said displaceable plunger-handle is displaced as a result of said flow, the plunger element is displaced into the syringe body. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification