Patent US3715468A successfully refreshed from Google Patents.
Patent US3129799A successfully refreshed from Google Patents.
US3129799A
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Ram arrester for press brakes
Assignee: Niagara Machine and Tool Works
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Filing: 1961-10-04
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Granted: 1964-04-21
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Expires: 1981-10-04
Abstract
No abstract record available.
Inventors
- 👤 Reeve W Dean
- 👤 Willard J Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:21
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/14; B21; B21D; B21D5/00; B21D5/02; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4564; Y10T83/4567; Y10T83/4569
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
IN A POWER OPERATED PRESS BRAKE HAVING A RAM AND POWER MEANS FOR RECIPROCATING SAID RAM TO EFFECT WORKING AND RETURN STROKES, A MANUALLY OPERABLE MEMBER AND A CONTROL MEMBER FOR RENDERING SAID POWER MEANS SELECTIVELY OPERABLE AND INOPERABLE, EACH OF SAID MEMBERS HAVING OFF AND ON POSITIONS AND EACH BEING RESILIENTLY BIASED TO OFF POSITION, YIELDABLE MEANS NORMALLY CONNECTING SAID MEMBERS FOR JOINT MOVEMENT BETWEEN OFF AND ON POSITIONS BUT RELEASABLE UNDER THE FORCE NORMALLY REQUIRED TO MOVE SAID CONTROL MEMBER TO ON POSITION AND HOLD THE SAME THEREAT, ELECTROMAGNETIC MEANS AND A CIRCUIT THEREFOR NORMALLY ENERGIZED TO PREVENT RELEASE OF SAID MEMBERS, LIMIT SWITCH MEANS ACTUATABLY BY SAID RAM AT A PREDETERMINED POINT IN ITS WORKING STROKE TO OPEN SAID CIRCUIT WHEREBY SAID YIELDABLE CONNECTION RELEASES AND SAID CONTROL MEMBER RETURNS TO OFF POSITION, AND ALTERNATIVE CIRCUIT MEANS FOR SAID ELECTROMAGNETIC MEANS ENERGIZABLE BY RETURN OF SAID MANUAL MEMBER TO OFF POSITION, WHEREBY RETURN OF SAID MANUAL MEMBER TO OFF POSITION ESTABLISHES RECONNECTION OF SAID MEMBERS AND ENERGIZATION OF SAID ELECTROMAGNETIC MEANS WHEREBY SUBSEQUENT MOVEMENT OF SAID MANUAL MEMBER TO ON POSITION MOVES SAID CONTROL MEMBER TO ON POSITION TO COMPLETE A WORKING STROKE.
Claim 2
Dependent Claim
196 words
IN A POWER OPERATED PRESS BRAKE HAVING A RAM AND POWER MEANS FOR RECIPROCATING SAID RAM TO EFFECT WORKING AND RETURN STROKES, A MANUALLY OPERABLE MEMBER AND A CONTROL MEMBER FOR RENDERING SAID POWER MEANS SELECTIVELY OPERABLE AND INOPERABLE, EACH OF SAID MEMBERS HAVING OFF AND ON POSITIONS AND EACH BEING RESILIENTLY BIASED TO OFF POSITION, YIELDABLE MEANS NORMALLY CONNECTING SAID MEMBERS FOR JOINT MOVEMENT BETWEEN OFF AND ON POSITIONS BUT RELEASABLE UNDER THE FORCE NORMALLY REQUIRED TO MOVE SAID CONTROL MEMBER TO ON POSITION AND HOLD THE SAME THEREAT, ELECTROMAGNETIC MEANS AND A CIRCUIT THEREFOR NORMALLY ENERGIZED TO PREVENT RELEASE OF SAID MEMBERS, LIMIT SWITCH MEANS ACTUATABLY BY SAID RAM AT A PREDETERMINED POINT IN ITS WORKING STROKE TO OPEN SAID CIRCUIT WHEREBY SAID YIELDABLE CONNECTION RELEASES AND SAID CONTROL MEMBER RETURNS TO OFF POSITION, AND ALTERNATIVE CIRCUIT MEANS FOR SAID ELECTROMAGNETIC MEANS ENERGIZABLE BY RETURN OF SAID MANUAL MEMBER TO OFF POSITION, WHEREBY RETURN OF SAID MANUAL MEMBER TO OFF POSITION ESTABLISHES RECONNECTION OF SAID MEMBERS AND ENERGIZATION OF SAID ELECTROMAGNETIC MEANS WHEREBY SUBSEQUENT MOVEMENT OF SAID MANUAL MEMBER TO ON POSITION MOVES SAID CONTROL MEMBER TO ON POSITION TO COMPLETE A WORKING STROKE.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |