US3722545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulating ball valve
Assignee: HAMMEL-DAHL Inc 175 POST ROAD WARWICK RHODE ISLAND 02888 A CORP OF RI
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Filing: 1971-10-18
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Granted: 1973-03-27
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Expires: 1991-10-18
Abstract
Abstract A modulating ball valve wherein a rotatable plug supported by trunions journalled along an axis transverse to the direction of flow of the fluid to be controlled is provided with an indentation on the surface thereof. The indentation is formed as a plurality of overlapping cones having different base diameters, and it provides, in combination with a circular arc cutout in said plug and a tapered inlet aperture in the casing of said valve, a desired fluid flow characteristic.
Inventors
- 👤 R Furlani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0605; F16K5/08; F16K5/10; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86743; Y10T137/86751
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
68 words
A modulating ball valve comprising: a valve casing having an inlet aperture and an outlet aperture formed therein; and a ball plug having an indentation formed therein rotatably mounted within said casing; said indentation being formed by a plurality of overlapping conical cavities of different diameters, whereby the presentation of different portions of said indentation to the periphery of said inlet aperture varies the flow through said valve.
Claim 2
Dependent Claim
68 words
A modulating ball valve comprising: a valve casing having an inlet aperture and an outlet aperture formed therein; and a ball plug having an indentation formed therein rotatably mounted within said casing; said indentation being formed by a plurality of overlapping conical cavities of different diameters, whereby the presentation of different portions of said indentation to the periphery of said inlet aperture varies the flow through said valve.
Claim 3
Dependent Claim
52 words
A modulating ball valve, according to claim 1, further comprising: a conical inlet tube connected to said inlet aperture, said inlet tube being tapered to an increasing diameter in a direction away from said inlet aperture and cooperating with the indentation of said ball plug to provide said flow through said valve.
Claim 4
Dependent Claim
22 words
A modulating ball valve, according to claim 2, wherein the characteristic of the flow through said valve is an equal percentage characteristic.
Claim 5
Dependent Claim
28 words
A modulating ball valve, according to claim 1, wherein said plug further comprises a circular arc aperture formed therein, said circular arc aperture being displaced from said indentation.
Claim 6
Dependent Claim
42 words
A modulating ball valve, according to claim 4, wherein said indentation reaches the periphery of said inlet aperture to provide a first flow aperture before said circular arc aperture reaches said periphery as said plug rotates to provide flow through said valve.
Claim 7
Dependent Claim
34 words
A modulating ball valve, according to claim 5, wherein said circular arc aperture moves toward said periphery to form a second flow aperture as said plug rotates to further open said first flow aperture.
Claim 8
Dependent Claim
51 words
A modulating ball valve, according to claim 6, wherein said indentation and said circular arc aperture are so positioned that said second flow aperture begins to open before said first flow aperture is fully closed and said first flow aperture is fully closed before said second flow aperture is fully opened.
Claim 9
Dependent Claim
41 words
A modulating ball valve, according to claim 7, further comprising: a seating ring mounted within said casing adjacent said ball plug, said plug and said ring being spaced one from the other so that fluid flow occurs during maximum valve closing.
Claim 10
Dependent Claim
22 words
A modulating ball valve, according to claim 1, wherein the apexes of said conical cavities are serially joined one to the other.
Claim 11
Dependent Claim
25 words
A modulating ball valve, according to claim 1, wherein the tangents of the bases of said conical cavities are serially joined one to the other.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |