Patent US2283500A successfully refreshed from Google Patents.
Patent US3260211A successfully refreshed from Google Patents.
US3260211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple pump apparatus
Assignee: Individual
•
Filing: 1965-08-16
•
Granted: 1966-07-12
•
Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Bernard John Springer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:12
CPC Classifications
F; F02; F02M; F02M43/00; F02M43/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A DUAL DELIVERY PUMP APPARATUS HAVING A CYLINDER BLOCK, A FIRST CYLINDER BORE IN SAID BLOCK, A FIRST RECIPROCATING PLUNGER SLIDEABLY REIVED IN SAID FIRST BORE, A LIQUID DUCT THROUGH SAID BLOCK AND ANGLED THROUGH SAID FIRST BORE BETWEEN THE INWARD AND THE OUTWARD RECIPROCATING LIMITS OF SAID FIRST PLUNGER, AN OBSTRUCTION WITHIN AND PARTIALLY BLOCKING SAID FIRST BORE BELOW THE INNERMOST RECIPROCATING LIMIT OF SAID FIRST RECIPROCATING PLUNGER, AND AUXILIARY PISTON MOUNTED FOR RECIPROCATING WITHIN SAID FIRST BORE INWARD FROM SAID OBSTRUCTION, A COMPRESSION SPRING WITHIN SAID BORE BELOW SAID FREE PISTON, A RELIEF DUCT COMMUNICATING THE BOTTOM OF SAID FIRST BORE WITH SAID FIRST LIQUID AND A SECOND CYLINDER BORE IN SAID BLOCK VERTICALLY ALIGNED WITH SAID FIRST BORE, THERE BEING A SECOND RECIPROCATING PLUNGER MEMBER SLIDEABLY RECEIVED IN SAID SECOND BORE AND A CAP MEANS JOINING THE FREE ENDS OF SAID PLUNGERS OUTSIDE OF SAID BLOCK, SAID CAP ENGAGED WITH THE APPARATUS RECIPROCATING MEANS.
Claim 2
Dependent Claim
157 words
A DUAL DELIVERY PUMP APPARATUS HAVING A CYLINDER BLOCK, A FIRST CYLINDER BORE IN SAID BLOCK, A FIRST RECIPROCATING PLUNGER SLIDEABLY REIVED IN SAID FIRST BORE, A LIQUID DUCT THROUGH SAID BLOCK AND ANGLED THROUGH SAID FIRST BORE BETWEEN THE INWARD AND THE OUTWARD RECIPROCATING LIMITS OF SAID FIRST PLUNGER, AN OBSTRUCTION WITHIN AND PARTIALLY BLOCKING SAID FIRST BORE BELOW THE INNERMOST RECIPROCATING LIMIT OF SAID FIRST RECIPROCATING PLUNGER, AND AUXILIARY PISTON MOUNTED FOR RECIPROCATING WITHIN SAID FIRST BORE INWARD FROM SAID OBSTRUCTION, A COMPRESSION SPRING WITHIN SAID BORE BELOW SAID FREE PISTON, A RELIEF DUCT COMMUNICATING THE BOTTOM OF SAID FIRST BORE WITH SAID FIRST LIQUID AND A SECOND CYLINDER BORE IN SAID BLOCK VERTICALLY ALIGNED WITH SAID FIRST BORE, THERE BEING A SECOND RECIPROCATING PLUNGER MEMBER SLIDEABLY RECEIVED IN SAID SECOND BORE AND A CAP MEANS JOINING THE FREE ENDS OF SAID PLUNGERS OUTSIDE OF SAID BLOCK, SAID CAP ENGAGED WITH THE APPARATUS RECIPROCATING MEANS.
References Cited (Backward Citations)
US1051171A
Cited
US1293853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |