Patent US495059A successfully refreshed from Google Patents.
Patent US3390638A successfully refreshed from Google Patents.
US3390638A
Expired / Lapsed
US
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Variable proportioning metering pump
Assignee: POWER ENGINEERING Inc
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Filing: 1966-08-08
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Granted: 1968-07-02
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Expires: 1986-08-08
Abstract
No abstract record available.
Inventors
- 👤 Hope B Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:37
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/60; B01F25/62; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/85986; Y10T137/85994
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A METERING PUMP WHICH COMPRISES: (A) A PAIR OF ENMESHED GEARS AT LEAST ONE OF WHICH IS DRIVEN AND WHICH ARE MOUNTED ON A SEALING PLATE, (B) A DISTRIBUTOR UNIT HAVING ONE FACE ADAPTED TO MATE WITH SAID SEALING PLATE AND HAVING A CHAMBER IN SAID FACE OF CONFIGURATION TO RECEIVE SAID GEARS AND HAVING AN INLET PORTION AND AN OUTLET PORTION ADJACENT TO THE ENMESHED ZONE OF SAID GEARS, (C) A FIRST FLOW PATH LEADING THROUGH SAID DISTRIBUTOR DIRECTLY TO SAID INLET PORTION, AND (D) A SECOND FLOW PATH LEADING TO SAID INLET PORTION FOR COMMINGLING WITH FLUIDS IN SAID SECOND PATH WITH FLUIDS FROM SAID FIRST PATH, SAID SECOND PATH INCLUDING A PORTION OF A CYLINDRICAL WELL IN SAID DISTRIBUTOR AND SAID WELL HAVING AN OPENING IN THE WALL THEREOF WHICH IS EXPOSED TO FLOW IN SAID SECOND PATH IN AN AREA WHICH VARIES WITH ROTATION OF SAID CYLINDER.
Claim 2
Dependent Claim
151 words
A METERING PUMP WHICH COMPRISES: (A) A PAIR OF ENMESHED GEARS AT LEAST ONE OF WHICH IS DRIVEN AND WHICH ARE MOUNTED ON A SEALING PLATE, (B) A DISTRIBUTOR UNIT HAVING ONE FACE ADAPTED TO MATE WITH SAID SEALING PLATE AND HAVING A CHAMBER IN SAID FACE OF CONFIGURATION TO RECEIVE SAID GEARS AND HAVING AN INLET PORTION AND AN OUTLET PORTION ADJACENT TO THE ENMESHED ZONE OF SAID GEARS, (C) A FIRST FLOW PATH LEADING THROUGH SAID DISTRIBUTOR DIRECTLY TO SAID INLET PORTION, AND (D) A SECOND FLOW PATH LEADING TO SAID INLET PORTION FOR COMMINGLING WITH FLUIDS IN SAID SECOND PATH WITH FLUIDS FROM SAID FIRST PATH, SAID SECOND PATH INCLUDING A PORTION OF A CYLINDRICAL WELL IN SAID DISTRIBUTOR AND SAID WELL HAVING AN OPENING IN THE WALL THEREOF WHICH IS EXPOSED TO FLOW IN SAID SECOND PATH IN AN AREA WHICH VARIES WITH ROTATION OF SAID CYLINDER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |