Telescoping pop-up sprinkler

Details Telescoping pop-up sprinkler Telescoping pop-up sprinkler

2009-02-09

2010-11-02

Hwu, Davis (Department: 3752)

Fluid sprinkling, spraying, and diffusing

With fixed support for or ground installed supply means

Embedded or buried sprinkler

C239S203000, C239S204000

Reexamination Certificate

active

07823804

ABSTRACT:
The telescoping pop-up sprinkler includes a telescoping piston assembly that allows the piston assembly of the pop-up to extend upwards at a greater height than the length of the pop-up sprinkler body. The telescoping pop-up sprinkler has a main body with a piston assembly that includes two or more pistons that engage internally with one another, with stops provided at one end of each piston to limit the stroke of each piston. Multiple internal seals are provided to prevent the bypassing of water around the outer diameter of each piston.

REFERENCES:
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patent: 3589616 (1971-06-01), Stephens
patent: 4753391 (1988-06-01), Rogers
patent: 5163618 (1992-11-01), Cordua
patent: 5265803 (1993-11-01), Thayer
patent: 5921322 (1999-07-01), Bonfield et al.
patent: 6216963 (2001-04-01), Bonfield et al.
patent: 6547159 (2003-04-01), Westby
patent: 6619570 (2003-09-01), Ericksen et al.
patent: 6629648 (2003-10-01), Jones
patent: 6874696 (2005-04-01), Ericksen et al.
patent: 6921029 (2005-07-01), Lockwood

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