Adjustable sprinkler head riser with cushioning region

Details Adjustable sprinkler head riser with cushioning region Adjustable sprinkler head riser with cushioning region

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 27/12 (2006.01) B05B 3/00 (2006.01)

Patent

CA 2638995

An apparatus for changing a length of a pipe, the pipe including first and second pipe portions each having an interior, includes a cylinder having a first end wall and an open end, the cylinder being connectable to the first pipe portion. The apparatus also includes a piston having a second end wall, the piston being receivable in slidable and sealable engagement with the cylinder, the piston being connectable to the second pipe portion, wherein the cylinder and the second end wall define a chamber physically isolated from the interiors of the first and second pipe portions, the chamber being adapted to receive a control fluid for displacing the piston relative to the cylinder to vary a distance between the first and second pipe portions while permitting fluid communication between the first and second pipe portions, the chamber including a cushioning region in communication with the chamber.

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