US3197682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safet electro-responsive-fluid chuck
Assignee: Pure Oil Co
•
Filing: 1961-04-13
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Granted: 1965-07-27
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Donald L Klass
- 👤 Thomas W Martinek
- 👤 Lynn E Ellison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:40
CPC Classifications
B; B23; B23Q; B23Q3/00; B23Q3/15; B23Q3/154
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A CHUCK COMPRISING A PLURALITY OF SPACED ELECTRODES SUPPORTED IN CO-PLANAR AND ELECTRICALLY INSULATED RELATIONSHIP; A THIN LAYER OF DIELECTRIC MATERIAL SUPPORTED ADMACENT TO SAID PLURALITY OF ELECTRODES, THE EXPOSED ADJACENT SURFACES OF SAID ELECTRODES BEING IN PHYSICAL CONTACT WITH THE EXPOSED SURFACE OF SIAD DIELECTRIC LAYER; A FILM OF ELECTROVISCOUS LIQUID COVERING AND SUPPORTED BY THE OTHER EXPOSED SURFACE OF SAID DIELECTRIC LAYER NOT IN CONTACT WITH SAID PLURALITY OF ELECTRODES; MEANS TO CONNECT SAID PLURALITY OF ELECTRODES TO AN ALTERNATING POTENTIAL SOURCE; OTHER ELECTRODES DISPOSED ADJACENT TO, BUT INSULATED FROM, THE ELECTRODES COMPRISING SAID PLURALITY; AND MEANS FOR GROUNDING SAID OTHER ELECTRODES.
Claim 2
Dependent Claim
104 words
A CHUCK COMPRISING A PLURALITY OF SPACED ELECTRODES SUPPORTED IN CO-PLANAR AND ELECTRICALLY INSULATED RELATIONSHIP; A THIN LAYER OF DIELECTRIC MATERIAL SUPPORTED ADMACENT TO SAID PLURALITY OF ELECTRODES, THE EXPOSED ADJACENT SURFACES OF SAID ELECTRODES BEING IN PHYSICAL CONTACT WITH THE EXPOSED SURFACE OF SIAD DIELECTRIC LAYER; A FILM OF ELECTROVISCOUS LIQUID COVERING AND SUPPORTED BY THE OTHER EXPOSED SURFACE OF SAID DIELECTRIC LAYER NOT IN CONTACT WITH SAID PLURALITY OF ELECTRODES; MEANS TO CONNECT SAID PLURALITY OF ELECTRODES TO AN ALTERNATING POTENTIAL SOURCE; OTHER ELECTRODES DISPOSED ADJACENT TO, BUT INSULATED FROM, THE ELECTRODES COMPRISING SAID PLURALITY; AND MEANS FOR GROUNDING SAID OTHER ELECTRODES.
References Cited (Backward Citations)
US2025123A
Cited
US2897424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |