Pipe joints or couplings – For branched path
Reexamination Certificate
1999-05-17
2001-07-24
Saether, Flemming (Department: 3627)
Pipe joints or couplings
For branched path
C285S197000, C285S205000
Reexamination Certificate
active
06264245
ABSTRACT:
FIELD OF INVENTION
The invention relates to a connection adaptor in particular for gas bottle valves with a clamp-like clamp mounting and a connecting piston bush which is axially moveable relative to the clamp mounting by means of an actuating device and which in its connected position bears upon a complementary connecting element forming a seal.
BACKGROUND OF THE INVENTION
A connection adaptor of this type in the form of a filling connection for gas bottle valves, especially acetylene bottles is known from DE-U-9115142. The filling connection comprises thereby a cylindrical housing which on one side has a filling inlet with a filing hose while on the opposite side of the housing there is formed a valve fixing mounting which has a lateral valve insertion opening into a receiving space. In plan view the clamp mounting has thereby the form of a retaining clamp so that the connection adaptor can be fixed to the valve at the side. In the region of the locking side there is hereby provided in addition an adjustment screw so that the size of the valve receiving space can be varied to accommodate the respectively available complementary connection.
Although this filling connection has fundamentally proved its worth, the construction is relatively demanding. This also applies to the actuating device with which the connecting piston bush is axially moveable and bears upon the complementary connection or the gas bottle valve in a closed position to form a seal. Thus, on the one hand an eccentric connection is described which is however relatively costly to produce and requires a lot of space. Furthermore, a compression disc-shaped actuating device is also described with which the filling connection can be detached or connected by manual axial pressure. The actuation hereby can be problematic however especially when hoses with fairly large diameters are connected with the result that the actuating device can no longer be used or only with an unfavourable hand position.
SUMMARY OF THE INVENTION
Consequently, the object underlying the invention is to improve a connection adaptor of the type mentioned at the beginning with respect to an easier operation and a simple construction. In addition, the connection adaptor should as far as possible be compact, flat-surfaced and easy to clean.
This object is achieved with a connection adaptor for gas bottle valves with a clamp-like clamp mounting and a connecting piston bushing which is axially moveable relative to the clamp mounting by means of an actuating device which in its connected position bears upon a complementary connecting element forming a seal. The actuating device is formed from a threaded sleeve through which the connecting piston bushing extends centrally.
Because of the design of the actuating device in the form of a threaded sleeve through which the connecting piston bush extends centrally, the connection adaptor can be realised with a minimum of components. Thus relative to the state of the art acknowledged at the beginning, the result is that only roughly half of the components are required. In addition, these are substantially simple turned parts so that the proposed connection adaptor can be produced very cheaply. In particular, hose connections which connect in a radial direction at the side can be dispensed with by means of the centrally guided-through fluid passage which is especially favourable if the complementary connection is accessible from only one direction. In addition, a deflection in the direction of flow is as a result avoided and the compact construction is aided.
In a preferred embodiment, the connecting piston bush is provided with a sliding-block-like twist-proof element so that as a result the piston guide bush and the removing/filling hose connected thereto is not affected in its torsional position, i.e. is not twisted since the connecting piston bush is mounted in a screw spindle and hence is guided axially. In addition, easy adjustment of the axial stroke of the connecting piston bush is possible with this twist-proof element. As a result, for example wear and tear of the sealing ring at the front end of the connecting piston bush can be compensated for also in a simple manner so that a secure sealing closure on the complementary connection is always guaranteed. In addition, simple fitting or replacing of the coding pins for various sorts of fluids is made possible as a result.
Further advantageous developments are the subject of the subclaims. In particular, it might be indicated that the screw bush surrounds the clamp mounting which is formed cylindrically towards the hose connection tightly so that in total the connection adaptor has a very compact, flat-surfaced and hence easy to clean outer form. This is particularly important for example for cleaning and sterilisation when used in hospitals.
REFERENCES:
patent: 3606390 (1971-09-01), Taylor
patent: 3799189 (1974-03-01), Christianson
patent: 5261705 (1993-11-01), Takahashi
patent: 5282493 (1994-02-01), Schwartz
patent: 5582223 (1996-12-01), Weh
patent: 1042329 (1954-11-01), None
Weh Erwin
Weh Wolfgang
Knobbe Martens Olson & Bear LLP
Saether Flemming
Weh GmbH Verbindungstechnik
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