Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1997-05-28
1999-12-14
Chambers, A. Michael
Fluid handling
Processes
Cleaning, repairing, or assembling
137322, 13761405, 285320, F16L 3728
Patent
active
060004193
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to the field of pressurized gas technology. It concerns a pressure cylinder having a check valve placed in a neck of the pressure cylinder and which is equipped with a connection opening for gas removal and is operable from the outside by means of a valve tappet displaceable along a central axis, as well as a connecting device, which is connectable in gastight, detachably locking manner with the check valve and contains means for operating the valve tappet.
Such a connection system is e.g. known from EP-A2-108 972.
PRIOR ART
In many fields the most varied gases are now used, but for the replacement of emptied cylinders or bottles trained personnel is not always available. As an example reference is made to the preparation of drinks in gastronomy or the supply of patients in the medical sector with life-necessary or other important gases (oxygen, nitrous oxide, etc.). Particularly in medicine, the health and even life can be a function of whether the correct gas cylinder can be connected in a short time.
The presently conventional connection system in such fields consists of a tap or cock with threaded connection for a pressure reducing valve or a gas line. The tap operates by means of a spindle and valve bell with seal against the pressure in the cylinder. The connection threads are standardized. However, the number thereof is limited, so that there are only inadequate possibilities for carrying out a coding of the connection systems on the basis of different gas types. It is also generally necessary to tighten a cap nut, for which purpose in almost all cases a large wrench is needed. Another problem is that there are left and right-hand threads, which on connecting the cylinder must firstly be identified, which leads to a loss of time. In addition, a considerable force expenditure is necessary for opening the tap when the spindle no longer functions easily.
The aforementioned document already proposes a connection system, which is particularly suitable for flammable liquefied petroleum gases. In this known system the pressure cylinder is equipped with a cylinder valve constructed as a check valve and on which can be slipped in a sealing, lockable manner a control valve. On slipping on, a control pin located in the control valve operates the check valve, so that a rapid connection is obtained.
However, the known connection system suffers from various disadvantages:
There is no special coding of the connection and this cannot be readily supplemented.
Due to the lack of guidance between the slip-on valve and gas cylinder valve, the connection process must be performed relatively carefully, so that the control valve is correctly seated on the gas cylinder valve.
A relatively high force expenditure is necessary for slipping on the control valve.
The system is more particularly suitable for fixed, standing pressure cylinders on which the control valve is slipped, so that a secure retention of the cylinders is not obtained, which can lead to problems with the small pressure cylinders or bottles conventionally used in medicine and gastronomy.
The check valve installed in fixed form on the cylinder is located above the screw-in thread, so that e.g. if the cylinder falls over, the cylinder valve is sheared and the cylinder content escapes in an unimpeded manner, which can lead to significant safety risks.
DESCRIPTION OF THE INVENTION
The problem of the invention is to provide a connection system for pressure cylinders, which allows an easy and rapid replacement or connection of the cylinders, ensures high security against faulty operation and incidents, permits safe handling and storage of the cylinders and makes available numerous coding possibilities.
In the case of a connection system of the aforementioned type, this problem is solved in that the pressure cylinder is mechanically couplable with the check valve and the connecting device in a common pivoting axis positioned transversely to and outside the central axis and are connectable in the coupled state by
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patent: 4331175 (1982-05-01), Brake et al.
patent: 4736926 (1988-04-01), Fallon et al.
patent: 4763690 (1988-08-01), Martin
patent: 4795202 (1989-01-01), Mader
patent: 5080414 (1992-01-01), Hellquist et al.
patent: 5150880 (1992-09-01), Austin, Jr. et al.
patent: 5586748 (1996-12-01), Kish
Carbagas
Chambers A. Michael
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