Patent US3918643A successfully refreshed from Google Patents.
US3918643A
Expired / Lapsed
US
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Impact and reactant step-by-step rotary sprinkler head
Assignee: LR Nelson Corp
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Filing: 1974-11-01
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Granted: 1975-11-11
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Expires: 1994-11-01
Abstract
Abstract A reversible part-circle step-by-step rotary sprinkler head having an impulse arm of the impact type in which the impulse arm has a first reactant portion disposed in a position thereon radially outwardly of the outlet and within the flow axis thereof when the impulse arm is disposed in the impacting position which has a first reactant surface shaped to deflect water issuing from the outlet in a direction opposite to that of the impact movement and establish a reactant force on the impulse arm acting to move the same in a direction toward the impacting position, the sprinkler body has a reactant element thereon disposed radially outwardly of the first reactant portion in a position spaced in the aforesaid opposite direction from the flow axis of the outlet so as to receive the water deflected by the first reactant surface when the impulse arm is disposed in the impacting position and to permit unobstructed flow of water issuing from the outlet when the impulse arm is spaced from the impacting position, the reactant element has a second reactant surface thereon shaped to deflect the water impinging thereon further in the aforesaid opposite direction and establish a reactant force on the sprinkler body acting in the impacting direction, the impulse arm has a second reactant surface portion disposed in a position to receive the water issuing from the second reactant surface which has a third reactant surface thereon shaped to deflect the water laterally in the impacting direction so that it issues therefrom in a direction generally parallel with the flow axis of the outlet and establishes a reactant force acting on the impulse arm to move the same in the aforesaid opposite direction.
Inventors
- 👤 William R Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:55
CPC Classifications
B; B05; B05B; B05B3/00; B05B3/02; B05B3/04; B05B3/0455; B05B3/0461
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
371 words
A step-by-step rotary sprinkler head comprising a sprinkler body having an inlet and an outlet having a flow axis, means for mounting said sprinkler body for rotation about a vertical axis with said inlet in communication with a source of water under pressure and with the flow axis of said outlet extending upwardly and outwardly, an impulse arm mounted on said sprinkler body for oscillatory movement about a vertical axis toward and away from a limiting position of abutment with said sprinkler body, means for biasing said impulse arm into said limiting position so as to impart an impact force to said sprinkler body in one direction, said impulse arm having a first reactant portion disposed in a position thereon radially outwardly of said outlet and within the flow axis thereof when said impulse arm is disposed in said limiting position, said first reactant portion having a first reactant surface shaped to deflect water issuing from said outlet in an opposite direction and establish a reactant force on the impulse arm acting to move the same in said one direction toward said limiting position, said sprinkler body having a reactant element thereon disposed radially outwardly of said first reactant portion in a position spaced in said opposite direction from the flow axis of said outlet so as to receive the water deflected by said first reactant surface when said impulse arm is disposed in said limiting position and to permit unobstructed flow of water issuing from said outlet when said impulse arm is spaced from said limiting position, said reactant element having a second reactant surface thereon shaped to deflect the water impinging thereon further in said opposite direction and establish a reactant force on said sprinkler body acting in said one direction, said impulse arm having a second reactant surface portion disposed in a position to receive the water issuing from said second reactant surface, said second reacTant portion having a third reactant surface thereon shaped to deflect the water laterally in said one direction so that it issues therefrom in a direction generally parallel with the flow axis of said outlet and establishes a reactant force acting on said impulse arm to move the same in said opposite direction.
Claim 2
Dependent Claim
371 words
A step-by-step rotary sprinkler head comprising a sprinkler body having an inlet and an outlet having a flow axis, means for mounting said sprinkler body for rotation about a vertical axis with said inlet in communication with a source of water under pressure and with the flow axis of said outlet extending upwardly and outwardly, an impulse arm mounted on said sprinkler body for oscillatory movement about a vertical axis toward and away from a limiting position of abutment with said sprinkler body, means for biasing said impulse arm into said limiting position so as to impart an impact force to said sprinkler body in one direction, said impulse arm having a first reactant portion disposed in a position thereon radially outwardly of said outlet and within the flow axis thereof when said impulse arm is disposed in said limiting position, said first reactant portion having a first reactant surface shaped to deflect water issuing from said outlet in an opposite direction and establish a reactant force on the impulse arm acting to move the same in said one direction toward said limiting position, said sprinkler body having a reactant element thereon disposed radially outwardly of said first reactant portion in a position spaced in said opposite direction from the flow axis of said outlet so as to receive the water deflected by said first reactant surface when said impulse arm is disposed in said limiting position and to permit unobstructed flow of water issuing from said outlet when said impulse arm is spaced from said limiting position, said reactant element having a second reactant surface thereon shaped to deflect the water impinging thereon further in said opposite direction and establish a reactant force on said sprinkler body acting in said one direction, said impulse arm having a second reactant surface portion disposed in a position to receive the water issuing from said second reactant surface, said second reacTant portion having a third reactant surface thereon shaped to deflect the water laterally in said one direction so that it issues therefrom in a direction generally parallel with the flow axis of said outlet and establishes a reactant force acting on said impulse arm to move the same in said opposite direction.
Claim 3
Dependent Claim
60 words
A sprinkler head as defined in claim 1 including adjustable reversing means for effecting movement of said sprinkler body in the opposite direction between two adjustable limiting positions as a return stroke in a part-circle repetitive cycle the operative stroke of which includes movement of said sprinkler body between said two adjustable limiting positions in said one direction as aforesaid.
Claim 4
Dependent Claim
27 words
A sprinkler head as defined in claim 2 wherein said reversing means includes means for effecting said return stroke by rapid oscillatory movements of said impulse arm.
Claim 5
Dependent Claim
18 words
A sprinkler head as defined in claim 1 wherein said reactant element is fixed to said sprinkler body.
Claim 6
Dependent Claim
49 words
A sprinkler head as defined in claim 1 wherein said sprinkler body outlet is defined by a nozzle insert fixedly threadedly engaged with said sprinkler body, said nozzle insert having a rigid arm extending outwardly therefrom spaced laterally in said one direction from the flow axis of said outlet.
Claim 7
Dependent Claim
41 words
A sprinkler head as defined in claim 5 wherein said reactant element is rigidly secured to the outer end of said rigid arm by a pair of rigid webs spaced vertically on opposite sides of the flow axis of said outlet.
Claim 8
Dependent Claim
44 words
A sprinkler head as defined in claim 6 wherein said rigid arm includes an abutment surface facing in said opposite direction engageable by said first reactant portion of said impulse arm when the latter moves toward its limiting position to apply said impact force.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |