Chucks or sockets – Socket type – Spring biased jaws
Patent
1998-05-20
1999-09-28
Howell, Daniel W.
Chucks or sockets
Socket type
Spring biased jaws
279 204, 279 21, 279146, B23B 522
Patent
active
059574682
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a spring chuck device, in particular for quick connection couplings for gaseous and/or liquid media.
BACKGROUND OF THE INVENTION
Spring chuck devices of this sort represent a quick and secure connection to e.g. gas bottles because of their easy handling, by means of which a time-consuming screwing off and on of the fitting is not required. The spring chucks engage thereby in an interlocking manner to the interior and exterior threads, to collar-, muff- and flange-connections etc.
A plug-in coupling for a pressure sealed connection to a device which has a complementary connection is described in EP 0 202 592. This plug-in coupling comprises a cylindrical housing with a piston which can be adjusted within it in an a axial direction and which has spring chucks projecting from the housing on one of its ends. When the piston is adjusted in an axial direction relative to the housing, the spring chucks are expanded radially or pressed together via a ramp or diagonal surface arrangement between the housing and the piston according to the direction of movement. In a first embodiment form the piston and the spring chucks are designed in one piece. This demands a thin transition area between the piston and the spring chucks for the spring chucks to be able to be slid inwards or outwards via the ramp arrangement in a resilient manner. Even with larger sizes of device, this transition must be relatively thin so that the force needed for adjustment does not become too great. With frequent load changes, however, this thin transition is particularly prone to fatigue fracture. In addition, in order to replace the spring chucks, the entire plug-in coupling construction must be dismantled.
The disadvantages of the integral embodiment form are compensated for a by a further embodiment form in EP 0 202 592, in which the spring chucks and the piston constitute separate components and the spring chucks are hooked onto the piston. The spring chucks and the tension piston can be pinned together also for additional security. As a result the spring chucks can be replaced without changing the tension piston and can be fitted individually to the respective counter connection. However, in this embodiment form at least the front portion of the housing must be dismantled also, e.g. unscrewed for the spring chucks to be replaced.
SUMMARY OF THE INVENTION
From DE-A 24 28 646 furthermore, a quick connection for pipes with pressure reservoirs is known in which a shell is directed onto an outer sleeve of one pipe end. In the interior of the axially adjustable shell two-armed tilting levers are arranged for engaging in an interlocking manner with a fitting. The tilting levers have a groove on their inside in which a disc, serving as a counter spring for a spring is located and which is coupled with a collar disc and hence with the shell via the spring. In order to be able to replace the tilting levers, the sliding shell must hereby be likewise dismantled.
Consequently, the object underlying the invention is to create a spring chuck device of the type described at the beginning which makes possible a simpler and quicker replacement and assembly of the spring chucks.
An aspect of the invention involves a spring chuck device comprising a tension piston and several spring chucks. The spring chucks each having a connection end and a bearing end being secured detachably with their bearing ends to the tension piston and being axially adjustable together with the tension piston by means of an actuation element. The tension piston and the spring chucks form a spring chuck arrangement which is coupled to a moveable fixing element relative to the spring chuck arrangement for catching the bearing ends in an interlocking manner.
Accordingly a moveable fixing element is provided on a spring chuck arrangement so that in its stopping position it supports or encompasses in a interlocking manner the bearing ends of the spring chucks relative to the spring chuck. The fixing element can thereby be moved out o
REFERENCES:
patent: 2471921 (1949-05-01), Ashdown
patent: 3599998 (1971-08-01), Kiwalle et al.
patent: 5133565 (1992-07-01), Schmidt
Weh Erwin
Weh Wolfgang
Howell Daniel W.
Smith Monica
Weh GmbH Verbindungstechnik
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