초록 ▼

A pop-up sprinkler includes an outer housing having an inlet passage and an inlet for connection to a source of pressurized fluid. A riser is mounted in the housing for moving from a normally retracted position to an operative extended position in response to fluid pressure. A pressure responsive in

A pop-up sprinkler includes an outer housing having an inlet passage and an inlet for connection to a source of pressurized fluid. A riser is mounted in the housing for moving from a normally retracted position to an operative extended position in response to fluid pressure. A pressure responsive inlet valve assembly is mounted in the outer housing adjacent the inlet passage and includes a valve seat and a valve member. The inlet valve assembly further includes a velocity control disc that is biased into engagement with the valve seat. The velocity control disc initially meters inlet fluid for limiting a rate of opening of the valve member for controlling flow of fluid through the inlet and extension of the riser to the extended position. The velocity control disc is made of an elastomeric material and is deflectable radially inwardly to accommodate debris.

대표청구항 ▼

1. A pop-up sprinkler, comprising:an outer housing having an inlet passage and an inlet for connection to a source of pressurized fluid; a riser mounted in the outer housing for moving from a normally retracted position to an operative extended position in response to fluid pressure; and a pressure

1. A pop-up sprinkler, comprising:an outer housing having an inlet passage and an inlet for connection to a source of pressurized fluid; a riser mounted in the outer housing for moving from a normally retracted position to an operative extended position in response to fluid pressure; and a pressure responsive inlet valve assembly mounted in the outer housing adjacent the inlet passage, the inlet valve assembly including a valve seat, a valve member and a velocity control disc biased into engagement with the valve seat, the velocity control disc initially metering inlet fluid for limiting a rate of opening of the valve member for controlling flow of fluid through the inlet and extension of the riser to the extended position, the velocity control disc being made of an elastomeric material and being deflectable radially inwardly to accommodate debris.