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US 9,435,110 B2Granted
Back-pressure safeguard
AssigneeLasso Technik AG
InventorsDaniel Rohrer, Roger Waser
Life of this patent
Estimating the term…
Abstract
The backflow prevention device consists of a funnel-shaped membrane and a clamping device for mounting in a pipe. The clamping device consists of a spread member expanding the membrane to the pipe cross section and pressing it against the pipe wall, and a support member supporting the spread member against the pipe wall.
Claims7
A backflow prevention device consisting of an elastomeric element to be arranged in an interior of a pipe and a clamping device for securing the elastomeric element in the pipe,
- the elastomeric element having a shape of a conical bag with an open end to be arranged in the pipe toward the backflow, and a closed end,
- the clamping device comprising
- a support portion arranged radially outside the open end of the elastomeric element and being supported by the pipe and
- a spread portion being supported by the support portion and being arranged inside the open end, the spread portion comprising a screw mechanism to increase a circumference of the clamping device, thereby pressing a respective portion of the elastomeric element towards the pipe.
1 more element
Dependencies are inferred from the claim text.