US3264899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid lock device
Assignee: Hoover Universal Inc
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Filing: 1964-01-13
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Granted: 1966-08-09
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Expires: 1984-01-13
Abstract
No abstract record available.
Inventors
- 👤 William H Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:02
CPC Classifications
F; F16; F16B; F16B1/00; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7845; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A FLUID LOCKING DEVICE COMPRISING, IN COMBINATION, (A) AN ELONGATED TUBULAR CYLINDER, HAVING FIRST AND SECOND ENDS, (B) ANCHOR MEANS AFFIXED TO SAID CYLINDER FRIST END, (C) A SPRING ABUTMENT TO SAID CYLINDER ADJACENT SAID SECOND END, (D) A PARTITION FIXEDLY MOUNTED WITHIN SAID CYLINDER INTERMEDIATE THE ENDS THEREOF AND SEALED WITH RESPECT THERETO, (E) A PISTON ROD WITHIN SAID CYLINDER SLIDABLY EXTENDING THROUGH SAID PARTITION AND SEALED WITH RESPECT THERETO, (F) A FIRST PISTON WITHIN SAID CYLINDER AND MOUNTED ON SAID PISTON ROD INTERMEDIATE SAID CYLINDER SECOND END AND SAID PARTITION, (G) A SECOND PISTON WITHIN SAID CYLINDER AND MOUNTED ON SAID PISTON ROD INTERMEDIATE SAID CYLINDER FIRST END AND SAID PARTITION, (H) A PISTON ROD EXTENSION EXTENDING FROM SAID CYLINDER SECOND END, (I) A COMPRESSION SPRING WITHIN SAID CYLINDER OPERATIVELY INTERPOSED BETWEEN SAID SPRING ABUTMENT AND SAID FIRST PISTON, (J) AN ORIFICE DEFINED WITHIN SAID PARTITION ESTABLISHING FLUID COMMUNICATION BETWEEN THE CYLINDER CHAMBERS
Claim 2
Dependent Claim
155 words
A FLUID LOCKING DEVICE COMPRISING, IN COMBINATION, (A) AN ELONGATED TUBULAR CYLINDER, HAVING FIRST AND SECOND ENDS, (B) ANCHOR MEANS AFFIXED TO SAID CYLINDER FRIST END, (C) A SPRING ABUTMENT TO SAID CYLINDER ADJACENT SAID SECOND END, (D) A PARTITION FIXEDLY MOUNTED WITHIN SAID CYLINDER INTERMEDIATE THE ENDS THEREOF AND SEALED WITH RESPECT THERETO, (E) A PISTON ROD WITHIN SAID CYLINDER SLIDABLY EXTENDING THROUGH SAID PARTITION AND SEALED WITH RESPECT THERETO, (F) A FIRST PISTON WITHIN SAID CYLINDER AND MOUNTED ON SAID PISTON ROD INTERMEDIATE SAID CYLINDER SECOND END AND SAID PARTITION, (G) A SECOND PISTON WITHIN SAID CYLINDER AND MOUNTED ON SAID PISTON ROD INTERMEDIATE SAID CYLINDER FIRST END AND SAID PARTITION, (H) A PISTON ROD EXTENSION EXTENDING FROM SAID CYLINDER SECOND END, (I) A COMPRESSION SPRING WITHIN SAID CYLINDER OPERATIVELY INTERPOSED BETWEEN SAID SPRING ABUTMENT AND SAID FIRST PISTON, (J) AN ORIFICE DEFINED WITHIN SAID PARTITION ESTABLISHING FLUID COMMUNICATION BETWEEN THE CYLINDER CHAMBERS
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |