Patent US3323347A successfully refreshed from Google Patents.
US3323347A
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Hydraulic press of the pull-down type
Assignee: Loewy Engineering Co Ltd
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Filing: 1965-02-02
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Granted: 1967-06-06
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Leslie G Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:37
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/32; B21; B21C; B21C23/00; B21C23/002; B21J; B21J9/00; B21J9/02; B21J9/04; B21J9/10; B21J9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A HYDRAULIC PRESS OF THE PULL-DOWN TYPE, COMPRISING A STATIONARY BASE ARRANGED AT FLOOR LEVEL AND SUPPORTING A HOLDER FOR A WORKPIECE, A MOVABLE UPPER CROSSHEAD ON WHICH A PIERCING TOOL IS MOUNTED, A MOVABLE LOWER CROSSHEAD CONNECTED TO SAID MOVABLE UPPER CROSSHEAD BY COLUMNS, A MOVABLE BACK-UP CROSSHEAD ARRANGED BETWEEN SAID BASE AND SAID MOVABLE LOWER CROSSHEAD AND MOUNTING A BACK-UP STEM, AND A HYDRAULIC DRIVE FOR THE PIERCING TOOL WHICH DRIVE IS PARTLY ARRANGED ON SAID BACK-UP CROSSHEAD AND PARTLY ON SAID MOVABLE LOWER CROSSHEAD, SO THAT UPON THE DOWNSTROKE OF SAID DRIVE, THE UPPER MOVABLE CROSSHEAD WITH THE PIERCING TOOL IS PULLED DOWN AND PERFORMS ITS WORKING STROKE.
Claim 2
Dependent Claim
111 words
A HYDRAULIC PRESS OF THE PULL-DOWN TYPE, COMPRISING A STATIONARY BASE ARRANGED AT FLOOR LEVEL AND SUPPORTING A HOLDER FOR A WORKPIECE, A MOVABLE UPPER CROSSHEAD ON WHICH A PIERCING TOOL IS MOUNTED, A MOVABLE LOWER CROSSHEAD CONNECTED TO SAID MOVABLE UPPER CROSSHEAD BY COLUMNS, A MOVABLE BACK-UP CROSSHEAD ARRANGED BETWEEN SAID BASE AND SAID MOVABLE LOWER CROSSHEAD AND MOUNTING A BACK-UP STEM, AND A HYDRAULIC DRIVE FOR THE PIERCING TOOL WHICH DRIVE IS PARTLY ARRANGED ON SAID BACK-UP CROSSHEAD AND PARTLY ON SAID MOVABLE LOWER CROSSHEAD, SO THAT UPON THE DOWNSTROKE OF SAID DRIVE, THE UPPER MOVABLE CROSSHEAD WITH THE PIERCING TOOL IS PULLED DOWN AND PERFORMS ITS WORKING STROKE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |