Toggle over-center mechanism for shifting the reversing mechanism of an oscillating rotor type sprinkler
First Claim
1. A sprinkler, comprising:
- an outer housing having a lower end connectable to a source of pressurized water;
a riser vertically reciprocable along a vertical axis within the outer housing between extended and retracted positions when the source of pressurized water is turned ON and OFF;
a nozzle mounted at an upper end of the riser for rotation about the vertical axis;
a turbine mounted for rotation inside the riser; and
a drive mechanism mounted within the riser and connecting the turbine to the nozzle so that when the source of pressurized water is turned ON the resulting rotation of the turbine by the pressurized water will rotate the nozzle, the drive mechanism including a reversing mechanism for causing the nozzle to rotate between a pair of arc limits, the reversing mechanism including an over-center mechanism for shifting the reversing mechanism, the over-center mechanism including a first lever and a second lever held together by a coil spring, the first lever and the second lever being pivotable relative to each other to shift the reversing mechanism.
1 Assignment
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Accused Products
Abstract
A Pelton type turbine is mounted in a riser of a pop-up sprinkler for rotation about a horizontal axis and drives a bevel pinion gear reversing mechanism through a gear train reduction. One end of a yoke is coupled to a clutch and the other end is moved vertically by an over-center mechanism through a link arm to shift the direction of rotation of a nozzle turret connected to the upper end of a drive shaft. The over-center mechanism includes a pair of levers held together by a single coil spring with trunnions on a first lever pivoting in bearing surfaces of a second lever. An L-shaped actuating arm that extends from the second lever is tripped back and forth by a shift disc engaged by a pair of tabs of a turret coupling assembly.
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Citations
21 Claims
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1. A sprinkler, comprising:
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an outer housing having a lower end connectable to a source of pressurized water;
a riser vertically reciprocable along a vertical axis within the outer housing between extended and retracted positions when the source of pressurized water is turned ON and OFF;
a nozzle mounted at an upper end of the riser for rotation about the vertical axis;
a turbine mounted for rotation inside the riser; and
a drive mechanism mounted within the riser and connecting the turbine to the nozzle so that when the source of pressurized water is turned ON the resulting rotation of the turbine by the pressurized water will rotate the nozzle, the drive mechanism including a reversing mechanism for causing the nozzle to rotate between a pair of arc limits, the reversing mechanism including an over-center mechanism for shifting the reversing mechanism, the over-center mechanism including a first lever and a second lever held together by a coil spring, the first lever and the second lever being pivotable relative to each other to shift the reversing mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sprinkler, comprising:
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an outer housing having a lower end connectable to a source of pressurized water;
a riser vertically reciprocable along a vertical axis within the outer housing between extended and retracted positions when the source of pressurized water is turned ON and OFF;
a nozzle mounted at an upper end of the riser for rotation about the vertical axis;
a turbine mounted for rotation inside the riser; and
a drive mechanism mounted within the riser and connecting the turbine to the nozzle so that when the source of pressurized water is turned ON the resulting rotation of the turbine by the pressurized water will rotate the nozzle, the drive mechanism including a reversing mechanism for causing the nozzle to rotate between a pair of arc limits, the reversing mechanism including an over-center mechanism for shifting the reversing mechanism, the over-center mechanism including a first lever and a second lever held together by a coil spring having a first end connected to a first attachment point on the first lever and a second end connected to a second attachment point on the second lever, the first lever and the second lever being pivotable relative to each other to shift the reversing mechanism, and the first and second levers being configured, and the spring attachment points being located, so that the levers will be biased toward one or the other of two predetermined opposite end limit configurations without stalling at a third configuration intermediate the two end limit configurations.
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12. A sprinkler, comprising:
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an outer housing having a lower end connectable to a source of pressurized water;
a riser vertically reciprocable along a vertical axis within the outer housing between extended and refracted positions when the source of pressurized water is turned ON and OFF;
a nozzle mounted at an upper end of the riser for rotation about the vertical axis;
a turbine mounted for rotation inside the riser; and
a drive mechanism mounted within the riser and connecting the turbine to the nozzle so that when the source of pressurized water is turned ON the resulting rotation of the turbine by the pressurized water will rotate the nozzle, the drive mechanism including a reversing mechanism for causing the nozzle to rotate between a pair of arc limits, the reversing mechanism including an over-center mechanism for shifting the reversing mechanism, the over-center mechanism including a first lever and a second lever biased by a coil spring, the first lever and the second lever being pivotable relative to each other to shift the reversing mechanism. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification