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US 5,205,539 AGranted
Diaphragm valve
AssigneeGeorg Fischer Rohrleitungssysteme AG
InventorAdelbert Schalk
Life of this patent
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Abstract
A diaphragm valve is described which comprises a lower housing portion and a upper housing portion which are clamped together by a fastening device. An elastomeric diaphragm is located between the lower housing portion and the upper housing portion. A compression spring is arranged between either the lower housing portion or the upper housing portion and an element of the fastening device.
Claims39
A diaphragm valve which comprises:
- a lower housing portion which is constructed of a plastic material and which further comprises a passage channel for passage of a medium;
- an upper housing portion which is constructed of a plastic material;
- a diaphragm wherein said diaphragm is located between said lower housing portion and said upper housing portion;
- a fastening device for connecting said lower housing portion to said upper housing portion;
- and
- a compression spring which is pre-stressed and which is further arranged adjacent to each fastening device;
- wherein said lower housing portion and said upper housing portion are clamped together by said fastening device with a pre-determined force and further wherein said diaphragm is supported between said lower housing portion and said upper housing portion.
4 more elements
Dependencies are inferred from the claim text.