Patent US3172369A successfully refreshed from Google Patents.
US3172369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump assembly
Assignee: Individual
•
Filing: 1962-03-29
•
Granted: 1965-03-09
•
Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Vincent P M Ballu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:07
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/102; F04B11/00; F04B11/0008; F04B11/0016; F04B43/00; F04B43/0009; F04B43/0054; F04B43/02; F04B43/025; F04B43/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A PUMPING SYSTEM COMPRISING IN COMBINATION: AN INNER CASING FORMED WITH OPPOSITE AXIALLY ALIGNED CYLINDERS; A PAIR OF OPPOSITE PISTONS RESPECTIVELY MOUNTED FOR RECIPROCATION IN SAID CYLINDERS, SAID PISTONS HAVING CYLINDRICAL BOSSES PROJECTING TOWARD EACH OTHER; A DRIVER MEMBER PROVIDED WITH A BORE PREPENDICULAR TO THE AXIS OF SAID CYLINDERS AND SLIDABLY MOUNTED BETWEEN SAID BOSSES; A SPACER SLEEVE, PROVIDED WITH HOLES REGISTERING WITH SAID BORE AND RIGIDLY SECURED ONTO SAID BOSSES FOR INTERCONNECTING SAID PISTON COAXIALLY; A DRIVING SHAFT MOUNTED FOR ROTATION ACROSS SAID CASING AND PASSING THROUGH SAID HOLES AND THROUGH SAID BORE, SAID SHAFT BEING PROVIDED WITH AN ECCENTRIC SECTION ENGAGING SAID BORE; A PAIR OF CUP-SHAPED FLEXIBLE DIAPHRAGMS EXTERNALLY FITTED ONTO THE ENDS OF SAID CYLINDERS AND ENGAGING THE OUTER FACES OF SAID PISTONS RESPECTIVELY; SHELL MEMBERS FITTED TO
Claim 2
Dependent Claim
133 words
A PUMPING SYSTEM COMPRISING IN COMBINATION: AN INNER CASING FORMED WITH OPPOSITE AXIALLY ALIGNED CYLINDERS; A PAIR OF OPPOSITE PISTONS RESPECTIVELY MOUNTED FOR RECIPROCATION IN SAID CYLINDERS, SAID PISTONS HAVING CYLINDRICAL BOSSES PROJECTING TOWARD EACH OTHER; A DRIVER MEMBER PROVIDED WITH A BORE PREPENDICULAR TO THE AXIS OF SAID CYLINDERS AND SLIDABLY MOUNTED BETWEEN SAID BOSSES; A SPACER SLEEVE, PROVIDED WITH HOLES REGISTERING WITH SAID BORE AND RIGIDLY SECURED ONTO SAID BOSSES FOR INTERCONNECTING SAID PISTON COAXIALLY; A DRIVING SHAFT MOUNTED FOR ROTATION ACROSS SAID CASING AND PASSING THROUGH SAID HOLES AND THROUGH SAID BORE, SAID SHAFT BEING PROVIDED WITH AN ECCENTRIC SECTION ENGAGING SAID BORE; A PAIR OF CUP-SHAPED FLEXIBLE DIAPHRAGMS EXTERNALLY FITTED ONTO THE ENDS OF SAID CYLINDERS AND ENGAGING THE OUTER FACES OF SAID PISTONS RESPECTIVELY; SHELL MEMBERS FITTED TO
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |