Abstract:
A compact swimming pool cover handling system including a pair of stationary roller support members, a roller for attaching the pool cover, and a hydraulic power attenuator for operation of the system. The hydraulic power attenuator includes controls for reversing directions of the roller without removing the source of liquid operating the device.
Abstract:
A gear driven oscillating sprinkler head includes a shifting gear train for transmitting drive from a drive motor to the oscillating sprinkler head with a shifting mechanism for shifting alternate driving pinions into driving engagement with an internal ring gear with the pressure angle of the engaging teeth being different for the different drive pinions to thereby balance the shifting force applied by the shifting mechanism.
Abstract:
The present invention discloses an improved apparatus for injecting additives into a stream of fluid passing through the apparatus. The apparatus has a housing adapted for connecting to a source of fluid and to an external source of additive and also has an outlet through which the intermixed fluid and additive pass. Fluid entering the housing drives a turbine means, which converts the movement of the fluid into a rotary force. The turbine means is connected to a transmission means which changes the high-speed, low-torque rotary force produced by the turbine means to a rotary force having slower speed but higher torque. The transmission means drives a positive displacement pump means which draws additives from the external source into the fluid passing through the apparatus at a rate which is determined by the speed at which the turbine means rotates. The positive displacement pump means utilizes a wobble disk to convert the rotary motion produced by the transmission means to the reciprocating motion necessary to drive the pistons in the pump means. Additionally, the pump means incorporates multiple cylinders to allow either mixing of additives from various sources with the fluid passing through the apparatus, or to provide a method of controlling the concentration of a single additive injected into the fluid when all of the cylinders are connected to the same additive source.
Abstract:
A pop-up sprinkler unit for mounting beneath the surface of a soil formation includes an outer cylindrical housing for subsurface mounting, with an inner housing carrying a nozzle and drive turbine with a protective sleeve of a grit resistant material reciprocally mounted between the inner and outer housings for extending with the inner housing up through a portion of the soil for deflecting grit from between the sleeve and housing when the inner housing and sleeve is retracted.
Abstract:
A rotary stream sprinkler unit comprises a housing having a water flow passage in which is disposed a flow control unit having one or more passages configured to control the volume and pressure of a stream, which strikes and rotates a self-propelled rotary distributor head rotatably mounted at the outlet of the housing for dividing each stream into a plurality of final streams, and rotating each of the final streams through a selected arc during the rotation of the rotary head, with a pressure compensated damping device in the housing connected to the rotary head by means of a shaft supported by a resilient member at the outlet for controlling the rotational velocity thereof.
Abstract:
A rotary stream sprinkler unit comprises a body having a water flow passage in which is disposed a multi-passage flow control unit having a plurality of passages, each configured to control the volume and pressure of a stream with multiple outlets at the outlet end of the housing, and a rotary distributor cap rotatably mounted at the outlet of the housing for rotating each of the outlet streams through a selected arc during the rotation thereof.
Abstract:
Improvements in sprinkler systems having fluid under pressure flowing therethrough and a sprinkler head with a pop-up nozzle actuated by fluid pressure. An impeller is actuated by the fluid flow to rotate the nozzle and thus rotate the spray of fluid therefrom. A transmission is disposed between the impeller and the nozzle for transmitting rotation of the impeller to the nozzle. The transmission is sealed off from the fluid passing through the system by a resilient expandable diaphragm at one end. A fluid pressure responsive seal is provided in the system in sealing engagement with the nozzle. The sealed-off portion of the transmission is completely filled with a lubricating medium which is free to selectively contract or expand against the diaphragm in response to varying ambient conditions encountered by the sprinkler head. The nozzle may also include means for varying the pattern of the sprayed fluid and may be comprised of molded plastic components which may be assembled together.
Abstract:
A water pressure controlled indexing means for an irrigation sprinkler system in which a plurality of pilot valves, each operating an associated sprinkler or group of sprinklers is provided, has a ratchet wheel including a plurality of ratchet teeth and which is associated with one of the pilot valves to control pilot valve operation in response to ratchet position of rotation, a pawl positioned by mounting means advancing the ratchet wheel tooth by tooth increments of advancement, water pressure responsive means for moving the pawl in a forward stroke and spring biasing means for normally moving the pawl in a return stroke of a given amount when system pressure is lowered a predetermined amount which is above a given value, a tooth gap provided on the ratchet wheel for defeating continued rotation thereof while said pawl is continued in driving strokes in response to system pressure drops above said given value and override means including an additional spring means normally holding the pawl against an override retrun stroke whereby a next ratchet tooth beyond tooth gap is engaged, the overriding means being activated by a reduction in system pressure below said given amount to cause the first biasing means to over come the second biasing means to move the pawl a greater extent then the normal return stroke to thereby engage the next ratchet tooth.
Abstract:
A part-circle sprinkler having a sprinkler head incorporating a nozzle continually oscillates between two positions. The sprinkler head is connected to a transmission driven by an impeller The impeller is driven by a reversible stator which can direct a plurality of channelized streams of water against either side of the blades of the impeller and thereby cause the impeller, sprinkler head and nozzle to rotate in a clockwise or a counterclockwise direction. The reversing stator is controlled by a resilient switching arm operated by adjustable fingers on the exterior of the sprinkler head, which set its limits of rotation. As each limit of rotation is reached, one finger exerts a torque on the switching arm. The torque causes the arm to twist until it exerts sufficient force on the reversing stator to overcome the force of the water on the stator vanes and thus reverse the direction of the stator. The sprinkler head then rotates in the opposite direction, which brings the other finger toward the switching arm. The flow of water through the sprinkler is axial from inlet to nozzle.