Patent US3368440A successfully refreshed from Google Patents.
US3368440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing machines for trimming sheet material
Assignee: Maschinenfabrik Sack GmbH
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Filing: 1966-04-01
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Granted: 1968-02-13
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Expires: 1986-04-01
Abstract
No abstract record available.
Inventors
- 👤 Griese Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:30
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/04; Y; Y10; Y10T; Y10T83/00; Y10T83/808; Y10T83/869; Y10T83/8737
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A SHEARING MACHINE FOR TRIMMING SHEET MATERIAL, COMPRISING A FRAME STRUCTURE, A STATIONARY LOWER BLADE ON SAID STRUCTURE, A RECIRPOCATING UPPER BLADE FOR SHEARING ACTION WITH SAID LOWER BLADE IN A GIVEN CUTTING PLANE, A SLIDER GUIDING SAID UPPER BLADE FOR RECIPROCATION IN SAID PLANE, MEANS GUIDING SAID SLIDER FOR MOVEMENT IN A DIRECTION INCLINED TO SAID PLANE, DRIVE MECHANISMS CONNECTED TO SAID UPPER BLADE AND TO SAID SLIDER RESPECTIVELY AND HAVING A DRIVING CYCLE FOR CAUSING SAID UPPER BLADE TO MOVE DOWNWARD IN SAID PLANE TO MAKE A CUT AND THEN MOVING SAID SLIDER WITH SAID UPPER BLADE AWAY FROM THE CUT SO THAT UPWARD MOVEMENT OF SAID UPPER BLADE TAKES PLACE IN A PLANE OFFSET FROM SAID CUTTING PLANE.
Claim 2
Dependent Claim
121 words
A SHEARING MACHINE FOR TRIMMING SHEET MATERIAL, COMPRISING A FRAME STRUCTURE, A STATIONARY LOWER BLADE ON SAID STRUCTURE, A RECIRPOCATING UPPER BLADE FOR SHEARING ACTION WITH SAID LOWER BLADE IN A GIVEN CUTTING PLANE, A SLIDER GUIDING SAID UPPER BLADE FOR RECIPROCATION IN SAID PLANE, MEANS GUIDING SAID SLIDER FOR MOVEMENT IN A DIRECTION INCLINED TO SAID PLANE, DRIVE MECHANISMS CONNECTED TO SAID UPPER BLADE AND TO SAID SLIDER RESPECTIVELY AND HAVING A DRIVING CYCLE FOR CAUSING SAID UPPER BLADE TO MOVE DOWNWARD IN SAID PLANE TO MAKE A CUT AND THEN MOVING SAID SLIDER WITH SAID UPPER BLADE AWAY FROM THE CUT SO THAT UPWARD MOVEMENT OF SAID UPPER BLADE TAKES PLACE IN A PLANE OFFSET FROM SAID CUTTING PLANE.
References Cited (Backward Citations)
US3263546A
Cited
US3246552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-12 | 1971-08-14 | 1972-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-12 | 1975-08-14 | 1976-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-12 | 1979-08-14 | 1980-02-13 | $7700.00 | Window Closed / Lapsed |