Patent US3707169A successfully refreshed from Google Patents.
US3707169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatically balanced plate valve with low flow resistance
Assignee: Eisenwerk Weserhuette AG
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Filing: 1971-03-31
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Granted: 1972-12-26
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Expires: 1991-03-31
Abstract
Abstract The invention relates to a valve having low flow resistance. The valve is hydrostatically balanced with a pressure field located eccentrically opposite a kidney-shaped control slot in a valve disc.
Inventors
- 👤 Ingo Friedrichs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:26
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0002; F01B3/0008; F03; F03C; F03C1/00; F03C1/02; F03C1/04; F03C1/0403; F03C1/0435; F03C1/0444; F04; F04B; F04B1/00; F04B1/04; F04B1/0404; F04B1/0452; F04B1/0465; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86638
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
A hydrostatically relieved control for use in pressure operated machines, comprising a housing, a valve means and a valve disc means, wherein said valve means and valve disc means are rotatable relative to said housing and wherein a pressure field is arranged eccentrically in relation to the axis of rotation of said valve means and opposite to a control slot in said valve disc means.
Claim 2
Dependent Claim
65 words
A hydrostatically relieved control for use in pressure operated machines, comprising a housing, a valve means and a valve disc means, wherein said valve means and valve disc means are rotatable relative to said housing and wherein a pressure field is arranged eccentrically in relation to the axis of rotation of said valve means and opposite to a control slot in said valve disc means.
Claim 3
Dependent Claim
27 words
A control in accordance with claim 1, wherein a section of a pressure disc serving to adjust the slot is located eccentrically opposite the valve disc means.
Claim 4
Dependent Claim
24 words
A control in accordance with claim 2, wherein an axially adjustable thrust collar is fitted between the valve disc means and the pressure disc.
Claim 5
Dependent Claim
25 words
A control in accordance with claim 2, wherein a packing producing an axial force is fitted between the valve disc means and the pressure disc.
Claim 6
Dependent Claim
25 words
A control in accordance with claim 2, wherein the pressure disc is axially adjustable and is fitted in such a way that it cannot turn.
Claim 7
Dependent Claim
30 words
A control in accordance with claim 1, including a plurality of control slots at least one of which differs in width in a radial direction from the axis of rotation.
Claim 8
Dependent Claim
21 words
A control in accordance with claim 1, including a plurality of control slots at least one of which is opened radially.
Claim 9
Dependent Claim
14 words
A control in accordance with claim 1, wherein the valve has its own bearings.
Claim 10
Dependent Claim
18 words
A control in accordance with claim 1, including a pressure pin between a plurality of the control slots.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |