US3304130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valves
Assignee: Hydrasearch Co Inc
•
Filing: 1965-07-02
•
Granted: 1967-02-14
•
Expires: 1985-07-02
Abstract
No abstract record available.
Inventors
- 👤 Roger E Doerfler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:26
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/26; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6969; Y10T137/6973; Y10T137/7722; Y10T137/7837; Y10T137/7859; Y10T137/7861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A HYDRAULICALLY OPERATED METERING, PROPORTIONING AND DELAY VALVE; SAID VALVE COMPRISING: A BODY HAVING A HYDRAULIC FLUID INLET MEANS AND AT LEAST TWO HYDRAULIC FLUID OUTLET MEANS; AT LEAST ONE SPOOL MEANS MOVABLE BETWEEN A FIRST POSITION ADJACENT SAID FIRST OUTLET MEANS AND A SECOND POSITION ADJACENT SAID INLET MEANS; CONNECTING MEANS INTERIORLY OF SAID SPOOL TO PROVIDE HYDRAULIC COMMUNICATION BETWEEN SAID FIRST OUTLET AND SAID INLET WHEN SAID SPOOL IS IN ITS FIRST POSITION AND MEANS TO SEAT SAID CONNECTING MEANS WHEN SAID SPOOL IS IN THE SECOND POSITION, SAID SPOOL HAVING A PROPORTIONING RATIO BETWEEN THE END THEREOF EXPOSED TO SAID FIRST OUTLET AND THE END THEREOF EXPOSED TO SAID INLET SUCH THAT THE HYDRAULIC FORCE EXERTED ON SAID SPOOL AT SAID FIRST OUTLET IS GREATER THAN THE HYDRAULIC FORCE EXERTED UPON SAID SPOOL AT SAID INLET; AND CHECK VALVE MEANS BETWEEN SAID FIRST OUTLET AND SAID INLET; SAID CHECK VALVE NORMALLY CLOSED WHEN PRESSURE IS APPLIED TO SAID INLET AND OPEN UPON RELEASE OF PRESSURE AT SAID INLET; CONDUIT MEANS BETWEEN SAID INLET MEANS AND SAID SECOND OUTLET MEANS; AND MEANS IN SAID CONDUIT RESPONSIVE TO THE INLET PRESSURE TO DELAY THE PRESSURE COMMUNICATION BETWEEN SAID INLET AND SAID SECOND OUTLET UNTIL A PREDETERMINED PRESSURE IS APPLIED TO SAID INLET.
Claim 2
Dependent Claim
213 words
A HYDRAULICALLY OPERATED METERING, PROPORTIONING AND DELAY VALVE; SAID VALVE COMPRISING: A BODY HAVING A HYDRAULIC FLUID INLET MEANS AND AT LEAST TWO HYDRAULIC FLUID OUTLET MEANS; AT LEAST ONE SPOOL MEANS MOVABLE BETWEEN A FIRST POSITION ADJACENT SAID FIRST OUTLET MEANS AND A SECOND POSITION ADJACENT SAID INLET MEANS; CONNECTING MEANS INTERIORLY OF SAID SPOOL TO PROVIDE HYDRAULIC COMMUNICATION BETWEEN SAID FIRST OUTLET AND SAID INLET WHEN SAID SPOOL IS IN ITS FIRST POSITION AND MEANS TO SEAT SAID CONNECTING MEANS WHEN SAID SPOOL IS IN THE SECOND POSITION, SAID SPOOL HAVING A PROPORTIONING RATIO BETWEEN THE END THEREOF EXPOSED TO SAID FIRST OUTLET AND THE END THEREOF EXPOSED TO SAID INLET SUCH THAT THE HYDRAULIC FORCE EXERTED ON SAID SPOOL AT SAID FIRST OUTLET IS GREATER THAN THE HYDRAULIC FORCE EXERTED UPON SAID SPOOL AT SAID INLET; AND CHECK VALVE MEANS BETWEEN SAID FIRST OUTLET AND SAID INLET; SAID CHECK VALVE NORMALLY CLOSED WHEN PRESSURE IS APPLIED TO SAID INLET AND OPEN UPON RELEASE OF PRESSURE AT SAID INLET; CONDUIT MEANS BETWEEN SAID INLET MEANS AND SAID SECOND OUTLET MEANS; AND MEANS IN SAID CONDUIT RESPONSIVE TO THE INLET PRESSURE TO DELAY THE PRESSURE COMMUNICATION BETWEEN SAID INLET AND SAID SECOND OUTLET UNTIL A PREDETERMINED PRESSURE IS APPLIED TO SAID INLET.
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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |