US3421769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seals
Assignee: Commercial Shearing Inc
•
Filing: 1964-08-27
•
Granted: 1969-01-14
•
Expires: 1984-08-27
Abstract
No abstract record available.
Inventors
- 👤 John L Boop
- 👤 Robert F Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:56
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/54; F16J9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A HOUSING FOR CONTAINING FLUID UNDER PRESSURE HAVING AN END MEMBER AND A ROTATABLE SHAFT JOURNALED IN SAID END MEMBER, A SEALING STRUCTURED COMPRISING AN ANNULAR WELL IN SAID END MEMBER OPENING INTO THE INTERIOR OF THE HOUSING AND CONCENTRIC WITH THE ROTATABLE SHAFT, SAID ANNULAR WELL HAVING AN MAJOR SURFACE IN A PLANE TRANSVERSE TO THE AXIS OF THE SHAFT AND AT LEAST ONE SEPARATE, SINGLE, METAL RING MOUNTED ON AND CONCENTRIC WITH SAID SHAFT IN SAID WELL AND AXIALLY SLIDABLE ON SAID SHAFT, SAID RING HAVING A MAJOR SURFACE PARALLEL WITH THE MAJOR SURFACE OF THE
Claim 2
Dependent Claim
99 words
IN A HOUSING FOR CONTAINING FLUID UNDER PRESSURE HAVING AN END MEMBER AND A ROTATABLE SHAFT JOURNALED IN SAID END MEMBER, A SEALING STRUCTURED COMPRISING AN ANNULAR WELL IN SAID END MEMBER OPENING INTO THE INTERIOR OF THE HOUSING AND CONCENTRIC WITH THE ROTATABLE SHAFT, SAID ANNULAR WELL HAVING AN MAJOR SURFACE IN A PLANE TRANSVERSE TO THE AXIS OF THE SHAFT AND AT LEAST ONE SEPARATE, SINGLE, METAL RING MOUNTED ON AND CONCENTRIC WITH SAID SHAFT IN SAID WELL AND AXIALLY SLIDABLE ON SAID SHAFT, SAID RING HAVING A MAJOR SURFACE PARALLEL WITH THE MAJOR SURFACE OF THE
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) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |