Valves and valve actuation – With correlated flow path – Valve operated by motion of flow path
Patent
1985-09-30
1988-09-13
Chambers, A. Michael
Valves and valve actuation
With correlated flow path
Valve operated by motion of flow path
2511495, F16L 3728
Patent
active
047703911
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to a plug and socket valve assembly comprising a valve body which automatically is opened and closed by insertion and withdrawal, respectively, of a mating connector plug.
The valve assembly is particularly useful in providing the means of attachment for one end of a pneumatic supply hose on a casing which houses a pump and control apparatus in a system for intermittent compression therapy in which the other end of the hose is connected to an inflatable garment.
BACKGROUND ART
In a known pneumatic pump for use in intermittent compression therapy a number of outlet sockets are provided for attachment of supply hoses. When a supply hose is disconnected from an outlet socket during operation of the pump it is necessary to seal the socket in order to maintain the efficiency of air supply to other outlet sockets. Sealing in the known construction is achieved by a simple plug or cap which is inserted into or over the outlet socket to stop egress of air.
DISCLOSURE OF THE INVENTION
The invention provides a plug and socket valve assembly comprising a valve body having an inlet and an outlet, which are isolated from one another by a resilient seal when the valve is closed characterised by a connector plug having a fluid passageway therethrough and which is adapted for insertion into the outlet of the valve body and constructed so as to displace the resilient seal when inserted into the valve body and thereby automatically open communication between said inlet and said fluid passageway whereby fluid can flow through said valve body and said connector plug.
BRIEF DESCRIPTION OF THE DRAWINGS
Two embodiments of a valve assembly according to the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a cross-sectional view through the valve body of a first assembly;
FIG. 2 is a side view of a connector plug of the first assembly;
FIG. 3 is a partial cross-sectional view through the first assembly with the connector plug inserted in the valve body;
FIG. 4 is a cross-sectional view through the valve body of a second assembly;
FIG. 5 is a side view of a connector plug of the second assembly, and
FIG. 6 is a partial cross-sectional view through the second assembly with the connector plug inserted in the valve body.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring first to FIG. 1 of the drawings, there is shown a valve body 10 mounted in an aperture 12 provided in the wall 14 of a casing. The valve body comprises two parts; a closure element 16 and an insert 18. The insert comprises a cylindrical stem 20 having an enlarged head 22 at one of its ends and a frustoconical flange 24 at its opposite end. A central bore 26 passes through the insert. The stem has a reduced diameter portion 28 intermediate the head 22 and flange 24. The closure element 16 includes a cap 30 incorporating a valve cavity 32 into which the stem of the insert is received so that a radially inwardly directed flange 34 within the cavity of the closure element 16 grips around the reduced diameter portion 28 of the insert stem thereby connecting together the insert and the closure element and providing a fluid-tight seal therebetween. A connector nozzle 36 integral with cap 30 is provided with a central bore 38 which communicates with the valve cavity 32.
A raised circular platform 40 is formed in the base of the cavity the top surface 42 of which provides the seat which seals against the mouth 24a of the insert stem to isolate the insert bore 26 from the nozzle bore 38 when the valve is closed. To this end, the closure element 16 is formed from a resilient material and the cap 30 is formed with an annular rib 44 so that platform 40 can be resiliently displaced away from the mouth 24a to open the valve whereby bore 38 communicates with bore 26.
In order to create a fluid tight seal between the cap 30 and the casing wall 14 the annular end face 46 of the cap is radially inwardly dished. The closure element 16 is able to rotate 360.degree. relative
REFERENCES:
patent: 2044252 (1936-06-01), Mitchell et al.
patent: 2248701 (1947-07-01), Fowler
patent: 2730382 (1956-01-01), De Mastri
patent: 3514129 (1970-05-01), Holdren
patent: 3565078 (1971-02-01), Vailliancourt
patent: 3620500 (1971-11-01), Santomieri
patent: 3768501 (1973-10-01), Elson et al.
patent: 4167204 (1979-09-01), Zeyra
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