Bottles and jars – Closures – With pressure-responsive seal
Patent
1983-07-12
1985-05-07
Norton, Donald F.
Bottles and jars
Closures
With pressure-responsive seal
604321, 215296, A61M 100
Patent
active
045152837
DESCRIPTION:
BRIEF SUMMARY
This invention relates to bungs or stoppers for collection jars which are filled through the agency of a vacuum applied to the interior of the jar through the bung, provided with at least two orifices for the purpose.
BACKGROUND ART
Jars of this kind are usually composed of glass and prior forms of bungs therefor have comprised solid plugs of rubber, or similar material, within which metal adaptors for connection of lines are embedded. Good sealing under different degrees of vacuum have not always been maintained, and chipping of the glass jar by impaction with the metal adaptors has occurred. A common function of the jars is to trap aspirated fluids, or blood, flowing in a suction line inserted in a patient during surgical operations. Reliable operation of the jar and bung, and facility for quick change-over to a fresh jar, are of prime importance regardless of the operating vacuum, which may be varied in service.
It is a chief object of the invention to provide a bung for a collection jar which is reliable in operation under all operating vacuums, and is relatively inexpensive.
DISCLOSURE OF INVENTION
In accordance with a general form of the invention there is provided a bung for a collection jar moulded in shell-form from plastics material comprising an outwardly domed top, a peripheral skirt depending from said top, a circumferential recess in the outer face of said skirt, and a resilient O-ring accommodated within said recess, the moulding and shaping of said domed top and said skirt being such that with internal vacuum in said jar the domed top becomes depressed to flex said skirt outwardly against the jar to increase sealing between the jar and the bung.
BRIEF DESCRIPTION OF DRAWINGS
The invention will be described in more detail with reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of a typical jar to be utilised with the bung of this invention;
FIG. 2 shows in exploded perspective, and part section, a first embodiment of the bung;
FIG. 3 shows in side elevation a second embodiment of the bung being entered into a jar shown in fragmentary section; and,
FIG. 4 shows the bung of the second embodiment in its fully inserted position within the jar.
BEST MODE OF CARRYING OUT THE INVENTION
A jar 1 designed for use with the bung of the invention is shown in FIG. 1. Preferably it is composed of transparent polycarbonate and has a downwardly tapered wall 2 with an enlarged diameter mouth 3 connected to the wall 2 by a shoulder 4. The mouth 3 has an internal annular wall 5 which may be slightly downwardly converging. In its application as a trap jar for aspirated fluids during a surgical operation, the jar 1 will be conveniently located near the patient and may include a wedge-shaped key 6 engageable within a wall bracket for support of the jar. The key 6 is preferably integrally formed with the exterior of the wall 2. A graduated scale 7 may be embossed on the outer surface of the wall 2.
A first form of bung 8 shown in FIG. 2 has a body 9 of shell-form composed of thermoplastic material provided with a top 10 on which is integrally formed a twisting handle 11 through which protrudes an inlet adapter 12 terminating at its lower end in an anti-splash tube 13. It is important that liquids drawn into the jar are not drawn away via the connecting vacuum line, and splashes of incoming liquids which could be drawn away are avoided through the tube 13 directing such liquid against the inner wall 2 of the jar 1. A split-cylindrical housing 14 for a float valve 15 held therein by a retaining disc 21 communicates through the twisting handle 11 with an orifice 16 for a vacuum line (not shown). The disc 21 is a snap-on fit on the end of the housing 14. An annular skirt 17 depends peripherally from the top 10 and is provided with an annular peripheral slot 18 in its outer wall. The skirt 17 also terminates externally in a small annular groove 17A adjacent its lower end 19 to render the region of the skirt 17 near its lower end 19 more pliable to enable it to conform under reduce
REFERENCES:
patent: 801734 (1905-10-01), Lorenz
patent: 844400 (1907-02-01), Radbruch
patent: 1566983 (1925-12-01), Sheriff
patent: 2746632 (1956-05-01), Bramming
patent: 3805788 (1974-04-01), Kleiner
patent: 3843016 (1974-10-01), Bornhorst et al.
patent: 3874541 (1975-04-01), Lagneaux
patent: 4013076 (1977-03-01), Puderbaugh et al.
patent: 4256109 (1981-03-01), Nichols
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