Swivel drive for fan-jet sprinkler
First Claim
1. In a swiveling fan-jet sprinkler which comprises a closed sprinkler housing, an elongated nozzle cylinder journalled in the housing and extending outwardly therefrom, a series of nozzle bores arranged in a fan-tail pattern on the exposed length portion of the nozzle cylinder, and a hose connector on the housing serving as an inlet for pressurized water, in such a sprinkler, a drive mechanism capable of deriving a rotary motion from the pressurized water and of translating this motion into a swiveling motion of the nozzle cylinder about its rotational axis, the sprinkler drive mechanism comprising in combination:
- an inlet nozzle as part of the hose connector adapted to produce a water jet, when pressurized water enters the sprinkler housing through the hose connector;
a turbine wheel arranged inside the sprinkler housing in such a way that the water jet causes the turbine wheel to rotate;
a reduction gear drive arranged inside the sprinkler housing, said drive having its input side connected to the turbine wheel and including, on its output side, a final drive shaft with an axis which is arranged at a distance from and substantially perpendicular to the axis of the nozzle cylinder and to an axial plane through the nozzle cylinder;
a rotary cam member mounted on the final drive shaft so as to rotate therewith, the cam member being so arranged that a median position thereof is in substantial alignment with said axial plane through the nozzle cylinder axis; and
a cam follower connected to the nozzle cylinder and cooperating with the cam member in such a way that the rotary motion of the cam member is translated into a reciprocating swiveling motion of the nozzle cylinder.
1 Assignment
0 Petitions
Accused Products
Abstract
A drive mechanism for a swiveling fan-jet sprinkler comprising a water-driven turbine, a reduction gear drive and, on the final drive shaft of the latter, a rotary cam member cooperating with a cam follower on the nozzle cylinder. The rotary cam member is preferably a swash plate with an elliptical torus-like rim, engaged by a fork-shaped cam follower. The mechanism may include adjustability of the swivel angle of the nozzle cylinder through a swash plate with an adjustable inclination on the final drive shaft.
6 Citations
10 Claims
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1. In a swiveling fan-jet sprinkler which comprises a closed sprinkler housing, an elongated nozzle cylinder journalled in the housing and extending outwardly therefrom, a series of nozzle bores arranged in a fan-tail pattern on the exposed length portion of the nozzle cylinder, and a hose connector on the housing serving as an inlet for pressurized water, in such a sprinkler, a drive mechanism capable of deriving a rotary motion from the pressurized water and of translating this motion into a swiveling motion of the nozzle cylinder about its rotational axis, the sprinkler drive mechanism comprising in combination:
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an inlet nozzle as part of the hose connector adapted to produce a water jet, when pressurized water enters the sprinkler housing through the hose connector; a turbine wheel arranged inside the sprinkler housing in such a way that the water jet causes the turbine wheel to rotate; a reduction gear drive arranged inside the sprinkler housing, said drive having its input side connected to the turbine wheel and including, on its output side, a final drive shaft with an axis which is arranged at a distance from and substantially perpendicular to the axis of the nozzle cylinder and to an axial plane through the nozzle cylinder; a rotary cam member mounted on the final drive shaft so as to rotate therewith, the cam member being so arranged that a median position thereof is in substantial alignment with said axial plane through the nozzle cylinder axis; and a cam follower connected to the nozzle cylinder and cooperating with the cam member in such a way that the rotary motion of the cam member is translated into a reciprocating swiveling motion of the nozzle cylinder. - View Dependent Claims (2, 3, 4, 6, 8, 10)
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- 5. the fork-shaped cam follower is an integral portion of the nozzle cylinder, being formed by an axially narrow remnant of the cylinder profile between sector-shaped deep radial recesses in the nozzle cylinder.
Specification