Patent US3259077A successfully refreshed from Google Patents.
US3259077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-syringe-type pump
Assignee: Dow Chemical Co
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Filing: 1964-10-26
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Granted: 1966-07-05
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Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Wiley
- 👤 Thomas D Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:25
CPC Classifications
F; F04; F04B; F04B7/00; F04B7/0076; F04B9/00; F04B9/02; F04B9/04; F04B9/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN A MULTI-SYRINGE-TYPE PUMP HAVING A BODY RESTING ON A BASE, A PLURALITY OF SYRINGES SUPPORTED BY SAID BODY, EACH SYRINGE HAVING A HOLLOW CYLINDER, A PLUNGER SHAFT SNUGLY AND SLIDABLY FITTED WITHIN SAID CYLINDER, EACH CYLINDER HAVING AN ORIFICE AT ITS END AND A NOZZLE POSITIONED OVER SAID ORIFICE, AND A LIQUID INLET AND A LIQUID OUTLET IN COMMUNICATION WITH EACH OF SAID SYRINGES OF SAID PUMP, THE IMPROVEMENT WHICH COMPRISES: (A) AN ELECTRICALLY OPERATED 4-WAY INLET AND OUTLET VALVE SYSTEM IN COMMUNICATION WITH EACH PAIR OF SAID SYRINGES; AND (B) A TWO DIRECTIONAL PLUNGER DRIVE MECHANISM IN COMMUNICATION WITH EACH SYRINGE, SAID DRIVE MECHANISM COMPRISING: (1) A SHAFT ROTATABLY MOUNTED IN THE PUMP BODY BELOW SAID PLUNGER SHAFT OF SAID SYRINGE; (2) POWER MEANS TO DRIVE SAID SHAFT; (3) A PLATE CAM FIXEDLY MOUNTED TO SAID SHAFT; (4) A CAM ROLLER ROTATABLY MOUNTED ON THE PLUNGER SHAFT ON SAID SYRINGE AND IN CONTACT WITH SAID PLATE CAM; (5) AN L-SHAPED RETURN ARM PIVOTALLY ATTACHED TO THE PUMP BODY, ONE LEG OF SAID L-SHAPED MEM-
Claim 2
Dependent Claim
176 words
IN A MULTI-SYRINGE-TYPE PUMP HAVING A BODY RESTING ON A BASE, A PLURALITY OF SYRINGES SUPPORTED BY SAID BODY, EACH SYRINGE HAVING A HOLLOW CYLINDER, A PLUNGER SHAFT SNUGLY AND SLIDABLY FITTED WITHIN SAID CYLINDER, EACH CYLINDER HAVING AN ORIFICE AT ITS END AND A NOZZLE POSITIONED OVER SAID ORIFICE, AND A LIQUID INLET AND A LIQUID OUTLET IN COMMUNICATION WITH EACH OF SAID SYRINGES OF SAID PUMP, THE IMPROVEMENT WHICH COMPRISES: (A) AN ELECTRICALLY OPERATED 4-WAY INLET AND OUTLET VALVE SYSTEM IN COMMUNICATION WITH EACH PAIR OF SAID SYRINGES; AND (B) A TWO DIRECTIONAL PLUNGER DRIVE MECHANISM IN COMMUNICATION WITH EACH SYRINGE, SAID DRIVE MECHANISM COMPRISING: (1) A SHAFT ROTATABLY MOUNTED IN THE PUMP BODY BELOW SAID PLUNGER SHAFT OF SAID SYRINGE; (2) POWER MEANS TO DRIVE SAID SHAFT; (3) A PLATE CAM FIXEDLY MOUNTED TO SAID SHAFT; (4) A CAM ROLLER ROTATABLY MOUNTED ON THE PLUNGER SHAFT ON SAID SYRINGE AND IN CONTACT WITH SAID PLATE CAM; (5) AN L-SHAPED RETURN ARM PIVOTALLY ATTACHED TO THE PUMP BODY, ONE LEG OF SAID L-SHAPED MEM-
References Cited (Backward Citations)
US1781416A
Cited
US2685840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |