Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1998-06-01
2000-08-01
Williams, Hezron
Measuring and testing
With fluid pressure
Dimension, shape, or size
73 375, 73 491, G01M 302, G01B 1308
Patent
active
060949694
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention related to a device for checking the tightness of a closure or a connecting weld provided in a flexible fluid-filled hose.
BACKGROUND OF THE INVENTION
This invention relates to a device for checking the tightness of a closure or a connecting weld provided in a flexible fluid-filled hose, wherein the device comprises two clamping members slidable relative to each other, forming in an inserted position a profile with at least one clamping space and an expansion space, as well as folding elements.
Such a device is known from FR-A-898421. This known device is used for testing the tightness of an air-filled tube from bicycles, motorcycles or others. In use two of these devices are clamped around the tube. Subsequently, the devices are moved towards each other for testing the part of the tube which lays between the devices. Hence, a problem is that at least two devices are required for testing a single tube wherein these devices have to be operated independently from each other.
SUMMARY OF THE INVENTION
The object of the invention is to provide a device for checking for tightness of a closure or a connecting weld provided in a flexible fluid-filled hose which device does not include the above referred to problem.
According to the invention the device further comprises a first and a second clamping space, with the expansion space provided between them, the arrangement being such that a first and a second hose portion can be folded and clamped in the first and second clamping space, so that the fluid present in the first and second hose portion is pressed to a third hose portion which includes the closure or connecting weld to be checked, which third hose portion can expand in the expansion space.
Such a device is intended for use in the treatment and processing of fluids stored in bags or containers, in particular blood. In this connection, it is conventional to transfer the fluid from a first bag or container to a second bag or container, utilizing flexible hoses connected to each bag or container, which hoses, for the purpose of transferring fluid, must be coupled by means of a connecting weld, to be subsequently uncoupled and closed by means of a closure. In this regard, it is of major importance, inter alia in view of the storage life and the sterility of the fluid, that the connecting welds or closures exhibit no holes or faults that may give rise to leakage.
By virtue of the features of the invention, a device is provided which on the one hand is simple and inexpensive to produce and on the other is easy to use during the treatment or processing of a fluid stored in bags or containers.
In order to obtain a uniform clamping of the hose portion, the device is preferably provided with means for the directed displacement of the two clamping members away from and towards each other, for instance pins engaging in guiding openings. In this connection, one of the two clamping members may possess folding elements arranged on the side thereof, which embrace the other clamping member in the condition of mutual abutment and fold the two ends of the hose portion, such that the fluid present in this hose portion is closed off from the remainder of the hose. In the case where leakage occurs in the hose portion to be checked, this hose portion can easily be closed off on both sides and subsequently be removed, in such a manner that the fluid present in the containers is saved.
In order to facilitate placement of the hose portion to be checked, the first and the second clamping space preferably have the same width, with at least one of the two clamping members being provided at its top surface with an auxiliary line for centric placement of the connecting weld or closure to be checked. To provide for a defined 2.2-fold increase in volume and a 1.33-fold increase of pressure, which values a hose conventional in the field of blood transfusion must be able to resist according to ISO standard 3826, the expansion space has the same width as the first or the second clamping space. By va
REFERENCES:
patent: 5674333 (1997-10-01), Loos et al.
Bons Jan
Loos Johannes Antonius
Schippers Alex
NPBI International B.V.
Politzer Jay L.
Williams Hezron
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