Gear drive sprinkler
AssigneeLego M. Lemelshtrich Ltd.
InventorYoram Hadar
Life of this patent
Estimating the term…
Abstract
A gear drive sprinkler includes a fixed ring gear fixed to the sprinkler housing and having a circular array of teeth; a rotatable ring grear coupled to the sprinkler nozzle and having a circular array of teeth coaxial with, but of a different number than, the teeth of the fixed ring gear; and a planetary gear rotated by the sprinkler drive and having a circular array of teeth meshing with the teeth of both ring gears so as to planetate around both ring gears and thereby to rotate the rotatable ring gear at an angular velocity corresponding to the difference in the number of teeth in the two ring gears.
Claims18
A rotary sprinkler, including a housing assembly having an inlet connectible to a water supply pipe supplying pressurized water, a drive disposed within said housing assembly and rotatable by said pressurized water, a rotatable nozzle carried by said housing assembly, and a transmission coupling said rotatable nozzle to said drive;
- characterized in that said transmission comprises:
- a fixed ring gear fixed to said housing assembly and having a circular array of teeth;
- a rotatable ring gear coupled to said nozzle and having a circular array of teeth coaxial with, but of a different number than, the teeth of said fixed ring gear;
- a planetary gear rotated by said drive and having a circular array of teeth meshing with the teeth of both said ring gears so as to planetate around both of said ring gears and thereby to rotate said rotatable ring gear at an angular velocity corresponding to the difference in the number of teeth in said two ring gears;
- and
- a spring-urged bypass valve normally closed to direct all the water to said drive but effective upon excessive pressure in the inletted pressurized water to cause inletted water to bypass said drive and thereby to flow directly to said nozzle.
A rotary sprinkler, including a housing assembly having an inlet connectible to a water supply pipe supplying pressurized water, a drive disposed within said housing assembly and rotatable by said pressurized water, a rotatable nozzle carried by said housing assembly, and a transmission coupling said rotatable nozzle to said drive;
- said transmission comprising:
- a fixed ring gear fixed to said housing assembly and having a circular array of teeth;
- a rotatable ring gear coupled to said nozzle and having a circular array of teeth coaxial with, but of a different number than, the teeth of said fixed ring gear;
- and a planetary gear rotated by said drive and having a circular array of teeth meshing with the teeth of both said ring gears so as to planetate around both of said ring gears and thereby to rotate said rotatable ring gear at an angular velocity corresponding to the difference in the number of teeth in said two ring gears;
- said inlet to the housing assembly including:
- a first inlet opening directing the water to flow in one direction to said drive to rotate the drive in said one direction;
- a second inlet opening directing the water to flow in the opposite direction to said drive to rotate the drive in said opposite direction;
- and a shutter actuatable to a first position to open said one inlet opening and to close said second inlet opening to thereby rotate the drive in one direction, or to a second position to open the second inlet opening and to close the first inlet opening to rotate the drive in the opposite direction.
A rotary sprinkler, including a housing assembly having an inlet connectible to a water supply pipe supplying pressurized water, a drive disposed within said housing assembly and rotatable by said pressurized water, a rotatable nozzle carried by said housing assembly, and a transmission coupling said rotatable nozzle to said drive;
- said transmission comprising:
- a fixed ring gear fixed to said housing assembly and having a circular array of teeth;
- a rotatable ring gear coupled to said nozzle and having a circular array of teeth coaxial with, but of a different number than, the teeth of said fixed ring gear;
- and a planetary gear rotated by said drive and having a circular array of teeth meshing with the teeth of both said ring gears so as to planetate around both of said ring gears and thereby to rotate said rotatable ring gear at an angular velocity corresponding to the difference in the number of teeth in said two ring gears;
- said housing assembly including a lower non-rotatable section including said inlet and said drive, and an upper rotatable section carrying said nozzle.
A rotary sprinkler, comprising:
- a housing assembly having an inlet connectible to a water supply pipe supplying pressurized water,
- a turbine wheel drive disposed within said housing assembly and rotatable by said pressurized water,
- a rotatable nozzle carried by said housing assembly,
- and a transmission coupling said rotatable nozzle to said drive;
- said transmission comprising:
- a fixed ring gear fixed to said housing assembly and having a circular array of teeth;
- a rotatable ring gear coupled to said nozzle and having a circular array of teeth coaxial with, but of a different number than, the teeth of said fixed ring gear;
- a planetary gear rotated by said drive and having a circular array of teeth meshing with the teeth of both said ring gears so as to planetate around both of said ring gears and thereby to rotate said rotatable ring gear at an angular velocity corresponding to the difference in the number of teeth in said two ring gears;
- and a step-down gearing between said drive and said planetary gear.
Dependencies are inferred from the claim text.