Patent US4255753A successfully refreshed from Google Patents.
US3248917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrospark forming apparatus
Assignee: —
•
Filing: —
•
Granted: 1966-05-03
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Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/14; B21D26/02; B21D26/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN HYDROSPARK FORMING APPARATUS FOR FORMING A METAL BLANK BY MEANS OF A SHOCK WAVE GENERATED IN A FLUID IN CONTACT WITH THE BLANK, THE COMBINATION OF: A PAIR OF ELECTRODES ADAPTED TO BE SUBMERGED IN THE FLUID, MEANS MOUNTING SAID PAIR OF ELECTRODES FOR RELATIVE MOVEMENT ONE WITH RESPECT TO THE OTHER, FROM A FIRST POSITION DEFINING AN INITIAL SPARK GAP SETTING TO A SECOND POSITION DEFINING A FURTHER SPACIAL RELATIONSHIP OF SAID ELECTRODES, AND CAPACITOR MEANS CONNECTED TO SAID PAIR OF ELECTRODES AND OPERATIVE TO GENERATE A SHOCK WAVE BETWEEN THE ELECTRODES WHEN IN SAID FIRST POSITION WHICH TRAVELS THROUGH SAID FLUID TO CAUSE THE ELECTRODES TO BE PUSHED APART TO ASSUME SAID SECOND POSITION AND TO THEREBY INCREASE THE LENGTH OF THE SPARK THEREBETWEEN.
Claim 2
Dependent Claim
127 words
IN HYDROSPARK FORMING APPARATUS FOR FORMING A METAL BLANK BY MEANS OF A SHOCK WAVE GENERATED IN A FLUID IN CONTACT WITH THE BLANK, THE COMBINATION OF: A PAIR OF ELECTRODES ADAPTED TO BE SUBMERGED IN THE FLUID, MEANS MOUNTING SAID PAIR OF ELECTRODES FOR RELATIVE MOVEMENT ONE WITH RESPECT TO THE OTHER, FROM A FIRST POSITION DEFINING AN INITIAL SPARK GAP SETTING TO A SECOND POSITION DEFINING A FURTHER SPACIAL RELATIONSHIP OF SAID ELECTRODES, AND CAPACITOR MEANS CONNECTED TO SAID PAIR OF ELECTRODES AND OPERATIVE TO GENERATE A SHOCK WAVE BETWEEN THE ELECTRODES WHEN IN SAID FIRST POSITION WHICH TRAVELS THROUGH SAID FLUID TO CAUSE THE ELECTRODES TO BE PUSHED APART TO ASSUME SAID SECOND POSITION AND TO THEREBY INCREASE THE LENGTH OF THE SPARK THEREBETWEEN.
References Cited (Backward Citations)
US2559227A
Cited
US3163141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |