US4085774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticavitation and low noise means for rotary valves
Assignee: Individual
•
Filing: 1976-07-19
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Granted: 1978-04-25
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Expires: 1996-07-19
Abstract
Abstract Anticavitation and low noise means attached to the downstream port of rotary valves, having spherical or semispherical plug means, consisting of a plate having one plane terminating surface and one opposite concave spherical indentation closely engaging the spherical plug surface and containing within its circumferential boundary line a multitude of individual flow passages, each of which has a reduced diameter discharge port within the terminating plane surface of the plate.
Inventors
- 👤 Hans D. Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:36
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/34; F16K3/22; F16K47/00; F16K47/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734; Y10T137/86743; Y10T137/86751
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
In a rotary valve including a body having inlet and outlet flow passages therein and a valve closure rotatably mounted therein, said closure having an arcuate convex spherical surface head portion, and cavitation resistance discharge means in said valve comprising: a plate secured in said outlet flow passage, said plate having an inner concave spherical surface complementary and closely spaced to, the path of rotation of said convex surface head portion; and a plurality of anti-cavitation passageways through said plate parallel to the axis of said outlet flow passage, each of said anti-cavitation passageways having an enlarged entrance portion opening from said concave surface and terminating within said plate near the downstream surface thereof, and an exit portion of smaller cross-section communicating with said entrance portion and opening from the downstream side of said plate.
Claim 2
Dependent Claim
135 words
In a rotary valve including a body having inlet and outlet flow passages therein and a valve closure rotatably mounted therein, said closure having an arcuate convex spherical surface head portion, and cavitation resistance discharge means in said valve comprising: a plate secured in said outlet flow passage, said plate having an inner concave spherical surface complementary and closely spaced to, the path of rotation of said convex surface head portion; and a plurality of anti-cavitation passageways through said plate parallel to the axis of said outlet flow passage, each of said anti-cavitation passageways having an enlarged entrance portion opening from said concave surface and terminating within said plate near the downstream surface thereof, and an exit portion of smaller cross-section communicating with said entrance portion and opening from the downstream side of said plate.
Claim 3
Dependent Claim
19 words
The rotary valve defined by claim 1 wherein: said entrance and exit portions of the anti-cavitation passageways are circular.
Claim 4
Dependent Claim
23 words
The rotary valve defined by claim 1 wherein: said exit and entrance portions of the anti-cavitation passageways are circular bores and counterbores, respectively.
Claim 5
Dependent Claim
19 words
The rotary valve defined by claim 1 wherein: said anti-cavitation passageways are relatively uniform spaced over said concave surface.
Claim 6
Dependent Claim
31 words
The rotary valve defined by claim 1 wherein: the ratio between the cross dimensions of the entrance and exit portions of the individual anti-cavitation passageways are at least 5 to 4.
Claim 7
Dependent Claim
30 words
The rotary valve defined by claim 1 wherein: the length of the exit portion of each individual anti-cavitation passageway is less than the cross dimension of the entrance portion thereof.
Claim 8
Dependent Claim
22 words
The rotary valve defined by claim 1 wherein: the lengths of the exit portion of the individual anti-cavitation passageways are substantially equal.
Claim 9
Dependent Claim
29 words
The rotary valve defined by claim 2 wherein: the length of the exit portion of each individual anti-cavitation passageway is less than the diameter of the entrance portion thereof.
Claim 10
Dependent Claim
24 words
The rotary valve defined by claim 3 wherein: the diametral ratio between each of said counterbore and bore is at least 5 to 4.
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) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |