Patent US3590844A successfully refreshed from Google Patents.
US3590844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for dividing the flow of liquid into two parts
Assignee: Individual
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Filing: 1969-05-07
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Granted: 1971-07-06
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Expires: 1989-05-07
Abstract
Abstract A device for dividing the flow of liquid into two parts comprises a control valve with two constant-section flow restrictors and a pair of restrictor means and another control valve with another pair of restrictor means arranged downstream of the first pair. Each restrictor means forms a variable transversal section slot whereas the outlet of each restrictor means of the first pair is connected to the inlet of one of the restrictor means of the second pair that permits division of the flow of liquid with a great accuracy under all operating conditions.
Inventors
- 👤 Boris Yakovlevich Ladenzon
- 👤 Iosif Naumovich Dekhtyar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:26
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/022; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2524
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
421 words
A device for dividing the flow of liquid into two parts comprising a housing having one inlet and two outlet pOrts; one longitudinal bore in said housing having closed edges; a movable spool shiftable in said longitudinal bore; said longitudinal bore accommodating said movable spool forming at each of the end faces of the spool an end chamber; said spool having therein an intermediate chamber communicating with said inlet port of the device; two constant throttles installed at the edges of said intermediate chamber; said spool having therein a pair of channels each of which communicates with the intermediate chamber through one of the constant throttles and with one of the end chambers; a pair of throttling means downstream of said constant throttles each of which is formed by throttling elements of the surface of said spool in combination with throttling elements of said longitudinal bore and creating a slot varying the area of its transversal section during longitudinal motion of said spool under the effect of a difference of pressures of liquid in said end chambers; said throttling means being arranged at both sides of said inlet port of the device and each having an inlet and outlet, the inlet of the throttling means communicating with one of said channels of said spool; said housing having a further longitudinal bore with closed edges wherein a further spool is installed and forms at its end faces further end chambers; said further spool having a pair of channels, a pair of further throttling means each of which is formed by throttling elements of the surface of the further spool in combination with throttling elements of said further longitudinal bore and creating a further slot varying the area of its transversal section during longitudinal motion of the further spool under the effect of a difference of liquid pressures in its end chambers; said channels and throttling means of the further spool being arranged at both sides of said inlet bore of the device and each of said further throttling means having an inlet and outlet; said housing having two intermediate bores each of which said bores communicates with the outlet of one of the throttling means of the first spool and communicates with the inlet of one of the throttling means of the further spool and through one of the channels in said further spool with one of its end chambers; the outlet of each of the throttling means of the further spool communicating with one of said outlet ports of the device.
Claim 2
Independent Claim
421 words
A device for dividing the flow of liquid into two parts comprising a housing having one inlet and two outlet pOrts; one longitudinal bore in said housing having closed edges; a movable spool shiftable in said longitudinal bore; said longitudinal bore accommodating said movable spool forming at each of the end faces of the spool an end chamber; said spool having therein an intermediate chamber communicating with said inlet port of the device; two constant throttles installed at the edges of said intermediate chamber; said spool having therein a pair of channels each of which communicates with the intermediate chamber through one of the constant throttles and with one of the end chambers; a pair of throttling means downstream of said constant throttles each of which is formed by throttling elements of the surface of said spool in combination with throttling elements of said longitudinal bore and creating a slot varying the area of its transversal section during longitudinal motion of said spool under the effect of a difference of pressures of liquid in said end chambers; said throttling means being arranged at both sides of said inlet port of the device and each having an inlet and outlet, the inlet of the throttling means communicating with one of said channels of said spool; said housing having a further longitudinal bore with closed edges wherein a further spool is installed and forms at its end faces further end chambers; said further spool having a pair of channels, a pair of further throttling means each of which is formed by throttling elements of the surface of the further spool in combination with throttling elements of said further longitudinal bore and creating a further slot varying the area of its transversal section during longitudinal motion of the further spool under the effect of a difference of liquid pressures in its end chambers; said channels and throttling means of the further spool being arranged at both sides of said inlet bore of the device and each of said further throttling means having an inlet and outlet; said housing having two intermediate bores each of which said bores communicates with the outlet of one of the throttling means of the first spool and communicates with the inlet of one of the throttling means of the further spool and through one of the channels in said further spool with one of its end chambers; the outlet of each of the throttling means of the further spool communicating with one of said outlet ports of the device.
References Cited (Backward Citations)
US3437103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |