US3101671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable seal for pumps
Assignee: Allis Chalmers Corp
•
Filing: 1962-02-05
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Granted: 1963-08-27
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Expires: 1982-02-05
Abstract
No abstract record available.
Inventors
- 👤 Earle E Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:20
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/106; F04D29/40; F04D29/42; F04D29/426; F04D29/4286; F04D29/60; F04D29/62; F04D29/622
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PUMP COMPRISING A CASING DEFINING A PUMPING CHAMBER HAVING AN INLET AND AN OUTLET, A SHAFT ADAPTED TO BE CONNECTED TO A SOURCE OF POWER AND EXTENDING THROUGH SAID CASING INTO THE SAID CHAMBER, AN IMPELLER POSITIONED IN SAID CHAMBER; SAID IMPELLER HAVING A HUB CONNECTED TO SAID SHAFT; A STUFFING BOX SURROUNDING SAID SHAFT AND ENGAGING SAID CASING, THE INBOARD END OF SAID STUFFING BOX BEING POSITIONABLE ADJACENT THE HUB OF SAID IMPELLER TO FORM A CLEARANCE THEREBETWEEN; ADJUSTABLE MEANS FOR MOVING SAID STUFFING BOX AXIALLY RELATIVE SAID HUB TO VARY THE SIZE OF SAID CLEARANCE; PACKING MEANS POSITIONED WITHIN SAID STUFFING BOX AND SPACED FROM SAID HUB, A RECESS AREA FORMED IN SAID STUFFING BOX BETWEEN SAID INBOARD END AND SAID PACKING MEANS AND A BYPASS CONDUIT CONNECTING SAID RECESS AREA TO AN AREA OF LOWER PRESSURE.
Claim 2
Dependent Claim
140 words
A PUMP COMPRISING A CASING DEFINING A PUMPING CHAMBER HAVING AN INLET AND AN OUTLET, A SHAFT ADAPTED TO BE CONNECTED TO A SOURCE OF POWER AND EXTENDING THROUGH SAID CASING INTO THE SAID CHAMBER, AN IMPELLER POSITIONED IN SAID CHAMBER; SAID IMPELLER HAVING A HUB CONNECTED TO SAID SHAFT; A STUFFING BOX SURROUNDING SAID SHAFT AND ENGAGING SAID CASING, THE INBOARD END OF SAID STUFFING BOX BEING POSITIONABLE ADJACENT THE HUB OF SAID IMPELLER TO FORM A CLEARANCE THEREBETWEEN; ADJUSTABLE MEANS FOR MOVING SAID STUFFING BOX AXIALLY RELATIVE SAID HUB TO VARY THE SIZE OF SAID CLEARANCE; PACKING MEANS POSITIONED WITHIN SAID STUFFING BOX AND SPACED FROM SAID HUB, A RECESS AREA FORMED IN SAID STUFFING BOX BETWEEN SAID INBOARD END AND SAID PACKING MEANS AND A BYPASS CONDUIT CONNECTING SAID RECESS AREA TO AN AREA OF LOWER PRESSURE.
References Cited (Backward Citations)
US1563129A
Cited
US1555023A
Cited
GB432743A
Cited
US2365058A
Cited
US2583777A
Cited
US2707920A
Cited
US2858768A
Cited
US2900919A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |