Patent US1765946A successfully refreshed from Google Patents.
Patent US3311433A successfully refreshed from Google Patents.
US3311433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary thrust bearing
Assignee: Forboro Co
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Filing: 1965-04-20
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Granted: 1967-03-28
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Expires: 1985-04-20
Abstract
No abstract record available.
Inventors
- 👤 James W Graham
- 👤 George E Sgourakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:28
CPC Classifications
F; F16; F16C; F16C27/00; F16C27/08; F16C17/00; F16C17/04; F16C17/08; F16C23/00; F16C23/02; F16C23/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A SELF-CENTERING ROTARY THRUST BEARING COMPRISING A FIRST BEARING CONTACT MEMBER HAVING A FLAT SURFACE, A SECOND BEARING CONTACT MEMBER HAVING A FLAT SURFACE OPPOSING THE FLAT SURFACE OF SAID FIRST MEMBER AND PARALLEL THERETO, ONE OF SAID TWO MEMBERS BEING MOUNTED FOR ROTATIONAL MOVEMENT RELATIVE TO THE OTHER MEMBER ABOUT AN AXIS TRANSVERSE TO SAID FLAT SURFACES; A BALL BETWEEN SAID TWO SURFACES AND ENGAGED THEREWITH TO SUPPORT A THRUST LOAD ALONG SAID ROTATIONAL AXIS; SAID TWO SURFACES BEING FORMED OF MATERIALS HAVING DISSIMILAR CHARACTERISTICS OF ENGAGEMENT WITH SAID BALL DEVELOPING A DIFFERENTIAL ACTION PRODUCING A FORCE THEREON TOWARDS SAID AXIS
Claim 2
Dependent Claim
102 words
A SELF-CENTERING ROTARY THRUST BEARING COMPRISING A FIRST BEARING CONTACT MEMBER HAVING A FLAT SURFACE, A SECOND BEARING CONTACT MEMBER HAVING A FLAT SURFACE OPPOSING THE FLAT SURFACE OF SAID FIRST MEMBER AND PARALLEL THERETO, ONE OF SAID TWO MEMBERS BEING MOUNTED FOR ROTATIONAL MOVEMENT RELATIVE TO THE OTHER MEMBER ABOUT AN AXIS TRANSVERSE TO SAID FLAT SURFACES; A BALL BETWEEN SAID TWO SURFACES AND ENGAGED THEREWITH TO SUPPORT A THRUST LOAD ALONG SAID ROTATIONAL AXIS; SAID TWO SURFACES BEING FORMED OF MATERIALS HAVING DISSIMILAR CHARACTERISTICS OF ENGAGEMENT WITH SAID BALL DEVELOPING A DIFFERENTIAL ACTION PRODUCING A FORCE THEREON TOWARDS SAID AXIS
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |