Abstract: A lawn sprinkler which may be easily disassembled for replacement of the sprinkler assembly or parts thereof to accommodate changes in surrounding soil or grass level. The lawn sprinkler includes a sprinkler body having its upper end opened and an inlet at its bottom end for receiving water into the sprinkler body from an underground supply of water under pressure. A suitable closure member is removably connected to the upper end of the sprinkler body and includes a central passageway. A sprinkler assembly is mounted for movement relative to the sprinkler body between a retracted position and an extended position and includes a longitudinally extending pipe for the passage of water under pressure therethrough. The sprinkler assembly may be easily removed from the sprinkler body for replacement of parts by simply removing the closure member from the upper end of the sprinkler body.

Abstract: A tool for gaining access to a pop-up sprinkler head when in a sprinkler casing, and for insertion into and removal from the casing of the sprinkler head; also a method for using the tool for gaining access to the interior of the casing and for sprinkler head removal. A tool consisting of a gripping portion for a gripping a part of the sprinkler head attaching the head to the casing, a handle, a lever interconnecting the handle and gripping portion, and portions for holding a pop-up cover out of engagement with the top of the casing, may be inserted into the casing to effect removal of the head from the casing while not requiring that the cover be manually head out of engagement with the casing top. The tool may also be used merely to allow an individual to gain access to portions of the head within the casing with both hands, one hand not being required to hold the cover out of engagement with the casing top.

Abstract: A rotary sprinkling system which is configured to minimize the accumulation and detrimental effects of debris, and which comprises a pop-up nozzle head secured to an inner housing slidably received within an outer housing and retained by the compressive force of a spring, such inner housing enclosing an impeller driven transmission subjected to only low pressure drops and having a speed-reducing gear train isolated from water flow, a simplified and easily adjustable direction controlling mechanism substantially inaccessible to intermeddlers, and a manually adjustable by-pass throttle to control the flow velocity of water driving a water-wheel impeller.