US3279378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starting means for an hydraulic pump
Assignee: Library and Archives Canada
•
Filing: 1964-12-02
•
Granted: 1966-10-18
•
Expires: 1984-12-02
Abstract
No abstract record available.
Inventors
- 👤 Robert S Sproule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:30
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/04; F04D13/043; F03; F03B; F03B15/00; F03B15/005; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A HYDRAULIC PUMP OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION, A CENTRAL SHAFT, AN IMPELLER MOUNTED ON SAID SHAFT, MOTOR MEANS FOR DRIVING SAID IMPELLER, A CASING SURROUNDING AT LEAST THE PERIPHERAL PORTION OF SAID IMPELLER, INLET AND OUTLET PASSAGES IN SAID CASING COMMUNICATING WITH THE IMPELLER, STARTER BLADES DISPOSED ON THE OUTER FACE OF THE IMPELLER, SAID STARTER BLADES BEING UNSHROUDED, MEANS INDEPENDENT OF THE INLET AND OUTLET PASSAGES FOR SUPPLYING JETS OF HYDRAULIC FLUID TO THE STARTER BLADES TO INITIATE ROTATION OF THE IMPELLER, MEANS FOR WITHDRAWING HYDRAULIC FLUID FROM THE STARTER BLADES AND MEANS FOR SUPPLYING AIR TO SPACE BETWEEN THE IMPELLER AND CASING WHEN THE MOTOR MEANS DRIVES THE IMPELLER.
Claim 2
Dependent Claim
114 words
A HYDRAULIC PUMP OF THE CLASS DESCRIBED COMPRISING, IN COMBINATION, A CENTRAL SHAFT, AN IMPELLER MOUNTED ON SAID SHAFT, MOTOR MEANS FOR DRIVING SAID IMPELLER, A CASING SURROUNDING AT LEAST THE PERIPHERAL PORTION OF SAID IMPELLER, INLET AND OUTLET PASSAGES IN SAID CASING COMMUNICATING WITH THE IMPELLER, STARTER BLADES DISPOSED ON THE OUTER FACE OF THE IMPELLER, SAID STARTER BLADES BEING UNSHROUDED, MEANS INDEPENDENT OF THE INLET AND OUTLET PASSAGES FOR SUPPLYING JETS OF HYDRAULIC FLUID TO THE STARTER BLADES TO INITIATE ROTATION OF THE IMPELLER, MEANS FOR WITHDRAWING HYDRAULIC FLUID FROM THE STARTER BLADES AND MEANS FOR SUPPLYING AIR TO SPACE BETWEEN THE IMPELLER AND CASING WHEN THE MOTOR MEANS DRIVES THE IMPELLER.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |