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US 4,186,775 AGranted
Water hammer shock absorber
AssigneeTozen Sangyo Co., Ltd.
InventorSankichi Muroi
Life of this patent
Estimating the term…
Abstract
A water hammer shock absorber comprising a casing provided on both side walls thereof with a hole and innerside thereof with a cavity adapted to have a pressurized gas sealed therein, a pipe having number of small perforations defined on the peripheral wall thereof between said hole of the casing, and an elastic tube covering the periphery of said pipe being fitted thereto in a watertight fashion.
Claims4
A water hammer shock absorber comprising:
- a casing forming a cavity adapted to have a pressurized gas sealed therein and provided with two openings, said casing having smoothly curved surface portions at junctures of the openings and the cavity;
- a pipe extending within the cavity between said two openings and sealed with respect to the casing, said pipe having perforations along its length that vary in area, the total area of said perforations along equal increments of pipe length being greater in a central portion of the pipe and lesser adjacent the two openings of the casing;
- and an elastic tube covering the perforations of the pipe and sealed about the pipe in a liquid-tight fashion, said tube having annular convex zones within the cavity adjacent each of said two casings openings and a central zone engaging the pipe in one condition of operation, the central zone being expansible in another condition of operation to a position spaced from the pipe, said annular zones being at least partially in contact with the inner wall of the cavity in both said conditions of operation.
Dependencies are inferred from the claim text.