GB2266842A

GB2266842A - Drip set with float pad cut-off

Info

Publication number: GB2266842A
Application number: GB9209726A
Authority: GB
Inventors: Yung-Feng Hung
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-05-06
Filing date: 1992-05-06
Publication date: 1993-11-17
Also published as: GB9209726D0

Abstract

The drip set has a floating pad 6 of soft silicone foam and a fixed pad seat 7 in the lower part of the fluid reservoir, the pad seat having a top surface of slightly conical form and a central through hole 701. When the fluid level falls, the soft float pad rests over the hole in a slightly deformed condition since the rim of the hole is slightly higher than the rest of the seat and the hole is thereby closed, allowing a given volume of fluid to remain in the fluid hose 3 and thereby prevent reverse flow of blood. <IMAGE>

Description

A Dripping Set With An Automatic-closing-pad Float This invention relates to adripping set, particularly, it is an automatic-closing-pad float of dripping set.

During a curing process, a doctor often conduct an I.V. injection for a patient in case of necessity so as to provide the patient with a nutritious liquid to meet his (or her) physiological requirement, and to have a patient recovered as soon as possible. Usually, the I.V. injection by means of a dripping set takes longer time, such as for several hours or so. During such an injection, the patient or the nurse might become not closely watching the injection condition, such as not properly taking care of the dripping set upon the fluid in the dripping set being drained away.

The aforesaid case is susceptible to taking place during night time because of the patient or the nurse easily falling into sleep; in that case, nobody takes care of the dripping set; as soon as the fluid is drained away, no fluid will be remained in the fluid hose; as a result, the patient's blood would flow reversely to cause the injection needle to be blockaded, and then the fluid hose has to be replaced, and a new injection needle has to be thrusted in to cause more time and services to restore the injection operation, which are deemed an inconvenience to both the patient and the nurse.

In view of the aforesaid drawbacks, an automatic closing dripping set has been developed as shown in FIG.1, of which a piston seat B is furnished in a reservoir A; the piston seat B has a through hole C, and above the piston seat B, there is a floating piston D, of which the lower end is attached with a square guide plate E and a plug F. The floating piston D and the square guide plate E are closely and accurately against the inner wall of the reservoir A.

the floating piston D is normally floating on the fluid in the reservoir. As soon as the fluid is drained away, the floating piston D would automatically fall on the piston seat B to have the plug f inserted into the through hole C to prevent air from entering a patient's vain and to prevent the blood from flowing reversely; therefore, a nurse may not stay with the patient always.

However, the operation of the aforesaid conventional 10 dripping set is mainly depending upon the through hole C on the piston seat B to be closed exactly by means of the plug F; in other words, the plug F and the through hole C must be mated each other accurately, and the up-and-down movement of the floating piston D and the square guide plate E must also be made in an accurate manner. All the aforesaid requirements would cause a higher manufacturing cost, which is deemed non-economical. Further, the plug F of the aforesaid conventional dripping set is often detained in the through hole c, being unable to float upwards upon a fluid being filled in the reservoir again, and such drawback would hinder the normal operation of the dripping set.

This invention relates to a dripping set with an automatic-closing-pad float, of which the main feature is that a fixed pad seat having a through hole is provided in the lower part of a fluid reservoir; above the fixed pad seat, there is a pad float made of a silicone. The pad float can float above the fixed pad seat upon a fluid being filled in a fluid reservoir, and then the through hole will be opened automatically to let a fluid flow into a patient's vein. As soon as the fluid is drained away, no floating force exists, and then the pad float will fall downwards to dose the through hole as a result of the attractive force of the fluid. The simple structure of the present invention can substantially reduce the manufacturing cost of the dripping set without hindering the normal operation of the dripping set.

An embodiment of this invention is described by way of example. With reference to the drawings in which: FIG.1 is a perspective view of a conventional dripping set.

FIG.2 is a perspective view of an embodiment of a dripping set according to the present invention.

FIG.3 is a side view of the present invention, being in closed condition.

Referring to FIGs.2 and 3, the embodiment of the present invention comprises a drop bottle 1, a fluid reservoir 2, a fluid hose 3, a flow adjuster 4 and an injection needle 5. The fluid in the drop bottle 1 flows through the outlet of the fluid reservoir 2, the fluid hose 3, the flow adjuster 4 which can be adjusted manually, and the injection needle 5, through which a fluid will be injected into the vein of a person. The main feature of the present invention is that a fixed pad seat 7 is mounted in the lower part of the fluid reservoir 2, which is mounted above the fluid hose 3; the fixed pad seat 7 may be integrally molded on the inner wall of the fluid reservoir 2. The center of the fixed pad seat 7 has a through hole 701, which is the only passage to have the fluid reservoir 2 become in communication with the fluid hose 3.The top side of the fixed pad seat 7 is slightly in a conic form in the through hole 701 direction, while the outer edge of the seat 7 is slightly lower than the hole 701 (as shown in FIG.3).

The sloping degrees of the conic fixed pad seat 7 should not be seen and aware of by a person's eye. Above the fixed pad seat 7, there is a movable pad float 6 made of soft material; the pad float 6 is a similar to a round plate made of a foamed silicone; the specific gravity of the pad flout is less than that of water. The pad float 6 is normally floating on the surface of the fluid in the fluid reservoir 2; when the fluid in the reservoir is drained away, the pad float will fall downwards until closing the through hole 701 of the fixed pad seat 7. Since the through hole 701 on top of the conic surface of the fixed pad seat 7 is slightly higher then the rest part of the seat 7, the soft pad float 6 will closely be attached to the top surface of the seat 7 in a slightly deformed manner to close the through hole 701 exactly as a result of the weight of the pad float 6 and the attractive force of the flowing fluid; therefore, a patient's blood would not flow reversely.

Further, when a drop bottle 1 is replaced with another one with fluid, the pad float 6 will float upwards upon the fluid flowing into the fluid reservoir 2, and the through hole 701 will be opened immediately to let the fluid flow into the fluid hose 3 so as to have the dripping operation continued smoothly.

Claims

1. A drippling set with an automatic-closing-pad float comprising a fixed pad seat in lower part of a fluid reservoir above a fluid hose, and top surface of said fixed pad seat being in a slightly conic form with a through hole in the center thereof; and a round pad float being movably put above said fixed pad seat, and said pad float able to close said through hole automatically as soon as a fluid in said fluid reservoir being drained away completely so as to reserve a given volume of fluid in said fluid hose.

2. A dripping set with an automatic-closing-pad float as claimed in claim 1, wherein said pad float is made of a soft foamed silicone.