IL22427A - Check-valves - Google Patents

Description

36 Patent Attorneys ISRAEL S C C Improvements in and relating to Johannes a of do hereby declare the nature of this invention and in what the same is to be to be particurlarly described in and by the following 22427 File 12686 The invention relates to a or a valve comprising a valve casing having an inlet and an outlet provided with a more or less elongated valve body which in its closed position bears on a seat in the The invention has for its object to reduce the resistance which the valve body opposes to the flow of According to the invention the seat for cooperation with the valve body consists of a diaphragm of elastic material secured in the casing at the inlet side and surrounding the valve body which has a diameter increasing in the direction towards the outlet side and the diaphragm in closed position of the valve body bears with its free end on the part of the valve body where the diameter of body is increasing or has its maximum With said construction of the valve not only the valve body is axially urged from its seat by the pressure of fluid at the inlet side of the casing but also the diaphragm is urged away from the valve body so that the valve body at a certain pressure of fluid at the inlet side leaves a relatively large passage area for the fluid flowing through the The invention will be further described with reference to the accompanying drawing showing an embodiment of the according to the Pile 12686 itself is a cross section taken on line of The cylindrical casing 1 consists of one piece and has at the inlet end internal screw thread and at the outlet end external screw thread for the connecting Into the casing 1 a ring 2 is threaded having an annular groove in which an elastic diaphragm is secured by A valve body 4 by means of fins 5 is guided in the casing 1 and by means of fins 6 in the ring The diaphragm of rubber or like elastic material and terminates in a thin annular lip 7 with which the diaphragm in closed position of the valve body bears on the circumference of the body at that part of the where the diameter of the body is increasing or has its maximum A spring 8 located in the cavity of the valve body is bearing on the ribs 9 at the outlet end of the casing and is urging the valve body in its closed Said displacement of the valve body to closed position is limited by the fins 6 abutting against a collar 10 at the inner side of the ring The opposite movement of the valve body is limited by the shoulder 11 at the inner wall of the outlet end of the The fins 5 of the valve body may be helically so that the valvo during its axial at o i File 12686 The abutment 10 at the inner side of the ring 2 may be replaced by a rod extending transversely in the casing and to which a tension spring secured to the valve and replacing spring 8 may be The fins 5 and 8 for guiding the valve body may be replaced by a central journal secured to the valve body and guided in the insufficientOCRQuality

Claims (3)

P.A. 22427 Pile 12686 24.VII«68 WHAT IS CLAIMED IS*

1. A check-valve having a casing provided with an inlet and an outlet provided with a more or less elongated valve body which in 31B closed position bears on a seat in the casing, characterized in that the seat consists of a sleeve-like diaphragm of elastic material secured in the casing at the inlet side and surrounding the valve, body, which at its part facing the inlet side has a diameter increasing in the direction towards the outlet side and the sleeve-like diaphragm in closed position of the valve body bears *ith its free end on the part of the valve body where the diameter of the body is increasing or has its maximum value,

2. A check-valve as claimed in Claim 1» characterized in that an abutment is provided at the inlet side in the casing, said abutment limiting the axial displacement of the alve body in the direction for closing*

3. A check-valve as described in connection with the accompanying drawing. Attorneys for Applicants