DE2418424A1 - COUPLING SYSTEM, IN PARTICULAR FOR DENTAL UNITS - Google Patents

Description

Dr. ULLRICH Dr. HATE * Dr. I = RANK

PATEPiTANWALTE IN HEIDELBERG AND MUNICH «, 1 Q /? Λ

69 Heidelberg 1

Gaishergstrasse 3

our reference: OOOl Tel. (O 62 2t) 2 53 35

CMW LABORATORIES LIMITED, 26/40 Broadwick Street, Londo n WI, England

Coupling system, especially for dental units.

The invention relates to connecting parts, in particular connecting parts for dental units for transmission a liquid from one line into another via a coupling which is formed with the aid of the connecting parts.

The invention particularly relates to a connection system in which a coupling part (the one with a supply source for fluid under pressure) is self-closing, i.e. it closes when the other connection part of the coupling is removed. The invention relates in particular to connections having a male part with a hollow one elongated body for inclusion in a coupling part with a resiliently pretensioned valve part, which in closed position is biased and under the effect of the plug-in part is opened. In the case of the compounds according to the present invention, the flexible design Valve in the coupling part generally takes the form of a spring-loaded valve that is resilient against a valve seat is biased, and in the couplings according to the invention this suitably has a valve seat the shape of an elastomeric O-ring with a bead-like design or a non-circular cross-section. This

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The Q-ring is suitably held in the swivel valve housing by means of a connector bushing which, on the other hand, is held in the valve housing by suitable fastening means such as a snap ring. The connection bushings are expediently made up of two parts or are at least equipped with an inner circular pressure fastening which has a different elastomeric O-ring and which, with the latter, serves to grip the plug-in part of the coupling when it is inserted into the valve housing coupling. The male part is fastened within a housing to a liquid-carrying conduit in any desired manner, but according to a preferred embodiment of the invention the male part is at its inner end (ie the end of the same which is furthest from the end which is in the is inserted coupling part) -versehen with a pair of annular recesses that contains \ ^r on which the outer a rubber ring or other elastomeric E-ring and the other is adapted to engage with a locking pin or a screw in Steekteil of the valve housing ·

The connections according to the invention are as described above for use in connection with a fluid supply from a pressurized source and are connected to the self-closing coupling part with the help of the plug-in part with a line connected thereto. The couplings according to the invention are particularly suitable for use in the Bental units as described in the German patent application P 22 15 058.9 and British Patent applications 20727/73, 20728/75 and 20777 / are described 73rd In the various systems, as described in the aforementioned patent applications, the coupling parts according to the invention are suitably combined in sets and form self-closing connections on the various units, as described in the aforementioned connections, and the plug-in parts

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of the connections form matching plug-in coupling parts on the various attachment members, as in the aforementioned applications is described.

For a better understanding of the invention is now to the Reference is made to the accompanying drawing.

Fig. 1 is an exploded view showing the elements of the connection according to the invention;

2A is an axial section through the male part of the 1 connection according to the invention and

Fig. 2B is an axial section through a coupling part according to the invention and shows the valve in the closed Position; and

Fig. 3 shows a mated coupling connection according to the invention, in which the valve in the coupling part has an open position.

With reference to the drawings, the male part of the coupling connection according to the invention contains a valve block 1 with a housing 2 connected to a line j5. The plug element is located inside the housing 2 (see FIG. 2A) 4 with an axial bore 5 and circular recesses 6 and 7, with an O-ring inside the latter is mounted. A threaded pin 9 within the valve block is in engagement with a circular recess 6 to to hold the plug element 4 in the housing 2 and the O-ring 8 is designed so that there is a liquid-tight connection between the inner walls of the housing 2 and the element 4.

The coupling part of the connection according to the invention has a valve block 11 with housing 12 connected to of line I3. Lying within the housing 12 (see FIG. 2B) the spring 14, the valve ball I5, the O-ring l6, the

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connecting bush 17, the O-ring l8, the connecting bush 19 and the snap ring 20. The ball 15 is resiliently pressed with the aid of the spring 14 against the O-ring 16, which with the aid of the Connection socket is held in place, which is formed by the connection socket 17 and the connection socket end 19 and which, on the other hand, is held in the housing with the aid of the snap ring 20. The connecting socket 17 and the socket end 19 between them form an inner circular one Ring that receives the O-ring 18. When the plug-in part 4 of the plug-in connection part in the housing of the coupling connection part is introduced (see Fig. J5), its tip pushes against the ball 15 and thereby opens the valve passage between the ball 15 and the O-ring l6, so that fluid from the line Ij5 through the housing 12 and the axial bore 5 can enter line j5. The liquid tightness the connection between the outside of the part 4 and the inside of the valve housing 12 is secured by the connecting effect of the O-rings l6 and 18, which the two aforementioned Close the parts with one another through the intermediary of the connecting socket 17.

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Claims (4)

Claims (1.) ^ Coupling system, especially for dental units, with ^ - ^ a plug connection part with a hollow elongated body for insertion into a bore in the housing of a coupling part, the bore of which is connected to a fluid-carrying line via a resilient, prestressed valve part, which is usually is biased when closed and that is opened by the action of the plug-in part, characterized in that the valve has the form of a valve under spring pressure (l4) which is resiliently biased against a valve seat with an elastomeric O-ring (l6) _e 2.) Coupling system according to claim 1, characterized in that the elastomeric O-ring (16) is held within the valve housing (12) in the coupling part with the aid of a connecting bushing (17), which on the other hand is held in the bore of the valve housing (12) . 3.) Coupling system according to claim 2, characterized in that the connecting socket (17, 19), which is expediently designed in two parts, is formed with a circular pressure fastening from another elastomeric O-ring (l8), the latter serving to connect the plug-in part ( 4) to record the connection when it is inserted into the bore of the clutch valve housing (12). 4.) Coupling system according to claim 1 to 3, characterized in that the hollow elongated body of the male part (4) is fixed within the housing (2) for connection to a liquid-carrying line (3) and at its inner end with a pair of circular recesses (6, 7), one of which is adapted to engage with a retaining pin or screw (9) in the plug valve housing (2). 409847/0760 Blank page