FR2693111A1 - Liq. injection or perfusion system - has two-arm spring-loaded clamp to apply pressure to bag of liquid - Google Patents

Abstract

The injection or perfusion system consists of a chamber (1) containing a bag (2) of a liquid, a spring (5) and a mechanism (4) to transmit the effort of the spring to the bag. The spring is in the form of a two-armed clamp (6a, 6b) one arm of which presses against the chamber the other against the transmission mechanism, and it can operate so that its two arms are pushed together or apart. The spring can be ibn various forms, e.g. a spiral with its two ends extended to form clamp elements, spring vanes, or a cam and lever mechanism. USE/ADVANTAGE - Injection or perfusion of liquids into living organism, esp. of human being. Design simplicity, allowing injection to proceed with chamber in any position.

Description

The invention relates to an improvement of devices for injecting a liquid into a living organism, in particular a human being.

The main of these devices is known to everyone. It is a container suspended from a bracket mounted on a carriage which is movable on the ground. The person or organism under infusion is connected to the container by a flexible hose extended by a hollow needle.

The height of the container is chosen so that the resulting hydraulic pressure allows the liquid to pass from the container into the body.

There are commercially available equipment to improve the stem systems.

For example: the portable, autonomous and automatic BIPRESS infuser, the
PRESSURE INFUSOR, There are others. These systems use the pressure of a gas, the obtaining of which is complex and unreliable.

Mechanical spring systems such as the IV PUSH or a whole series of systems using various devices such as German patent number W088 / 00065, such as international patent W086 / 03978, such as German patent DE35 1 7927C1, US patent 3,902,635 or the patent frsncsis8806595 cited for examples.

The invention relates to a simplification of all these devices.

The invention relates to a system for injecting a liquid into a living organism, in particular a human being, composed of an enclosure containing a pocket of liquid, a spring and a member for distributing force. of the spring on the pocket, characterized in that the spring is a clamp with two arms, one of which rests on the enclosure and the other on the member for distributing the force of the spring on the pocket.

According to another characteristic of the invention, the clamp acts by bringing its two arms closer together.

According to another characteristic of the invention, the clamp acts by spacing its two arms.

According to another characteristic of the invention, the spring is a wire wound in turns, extended at each end by a support member and whose direction of support is perpendicular to the winding axis of the turns.

According to another characteristic of the invention, the spring is a blade.

According to another characteristic of the invention, the spring is a gas acting through the enclosure which contains it on each of the arms of the clamp.

According to another characteristic of the invention, the spring is armed thanks to a cam acting on at least one of its arms and actuated by two levers, one of which is integral with the enclosure.

According to another characteristic of the invention at least one of the arms of the clamp movably presses on the enclosure.

According to another characteristic of the invention at least one of the arms of the clamp movably bears on the member for distributing the force of the spring.

The invention will be better understood by referring to the following drawings or
FIG. 1 represents in section a schematic device corresponding to the case where the clamp acts by bringing its arms closer together 1 represents the enclosure, 2 represents the pocket, 3 the liquid, 4 the force distribution member, 5 the spring, 6 a and 6b the arms, 7 the pipe.

 FIG. 2 represents in section a schematic device corresponding to the case where the clamp acts by spreading its arms 1 represents the enclosure, 2 represents the pocket, 3 the liquid, 4 the force distribution member, 5 the spring, 6 a and 6b the arms, 7 the pipe.

 FIG. 3 represents, according to a particular embodiment, a side view, in the high position and in the low position, of the device for arming the spring by cam and the movable link (8) between the spring and one of the parts of the spring force distribution member. In the embodiment shown the movable link (8) is expressed by a corridor.

5 represents the spring integrating the two arms, 8 represents the movable connection between one of the arms of the spring and a part of the force distribution member, 9 represents one of the cocking lever connected to the cam 10
FIG. 4 represents, according to a particular embodiment, a perspective view of the arming of the device by acting on the two levers 9 represents one of the arming lever, 11 represents the other arming lever which in this realization is integral with the enclosure, 4 represents the organs of force distribution
FIG. 5 represents a perspective view of the apparatus, according to a particular embodiment, armed pocket in place in the enclosure 9 represents one of the cocking lever, 11 represents the other cocking lever which in this embodiment is integral with the enclosure, 4 represents the force distribution members, 2 represents the pocket, 7 represents the pipe
OPERATION
Arming the device by action of both hands on the arming levers as shown in Figure 4 The cam spreads the two arms of the spring as shown in Figure 3.

The pocket is inserted into the device as shown in Figure 5, the approximation of the levers clears the cam, the released spring exerts its pressure on the pocket thanks to the force distribution member of the spring. The arm moves by playing on a part of the force distribution member as shown in FIG. 3. The purpose of this mobile connection is to keep the pressure torque constant.

Claims (9)

 System for injecting a liquid into a living organism, in particular a human being, composed of an enclosure (i) containing a pocket (2) of liquid, a spring (5> and a distribution (4) of the spring force on the pocket, characterized in that the spring is a clamp with two arms (6a, 6b), one of which rests on the enclosure and the other on the distribution member of the force of the spring on the pocket.  2 System according to claim 1 characterized in that the clamp acts by bringing together its two arms.  3 System according to claim 1 characterized in that the clamp acts by spacing of its two arms.  4 System according to all of the preceding claims characterized in that the spring is a wire wound in turns, extended at each end by a support member and whose direction of support is perpendicular to the winding axis of the turns .  5 System according to claims 1,2 and 3, characterized in that the spring is a leaf.  6 System according to claims 1,2 and 3, characterized in that the spring is a gas acting through the enclosure which contains it on each of the arms of the clamp.  7 System according to one of claims 1 to 7 characterized in that the spring is armed thanks to a cam acting on at least one of its arms and actuated by two levers (9, 11), one of which (it) of them is integral with the enclosure.  8 System according to all of the preceding claims, characterized in that at least one of the arms of the clamp movably presses on the enclosure  9 System according to claims 1 to 7, characterized in that at least one of the arms of the clamp movably presses (12) on the spring force distribution member.