US2749867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled pressure metal forming apparatus
Assignee: Individual
•
Filing: 1952-12-03
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Granted: 1956-06-12
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Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 John H Engel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:58
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; Y; Y10; Y10S; Y10S425/00; Y10S425/019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A METAL FORMING APPARATUS FOR USE WITH A DROP HAMMER OR SIMILAR PERCUSSIVE MACHINES, A CUSHION CYLINDER HAVING ONE CLOSED END, A GUIDE BLOCK SECURED TO THE OTHER END OF SAID CYLINDER, A PISTON WITHIN SAID CYLINDER, MEANS TO ADMIT FLUID BETWEEN SAID PISTON AND SAID CLOSED END, A VARIABLE RESTRICTED OUTLET FOR SAID FLUID, A PLURALITY OF PUSH RODS SLIDABLY PASSING THROUGH HOLES N SAID GUIDE BLOCK, THE LOWER ENDS OF SAID PUSH RODS RESTING ON SAID PISTON, A PLATEN SECURED TO THE UPPER ENDS OF SAID PUSH RODS, A MALE DIE SECURED TO SAID GUIDE BLOCK, SAID PLATEN HAVING A CLEARANCE HOLE TO FIT AROUND SAID MALE DIE, A PLATEN COVER HAVING A CLEARANCE HOLE, AN IMPACT PRESSURE HEAD COMPRISING A CYLINDER HAVING ONE CLOSED END, AND A RESILIENT PAD WITHIN SAID CYLINDER; SAID MALE DIE HAVING A STOP PORTION INCORPORATED THEREIN TO ENGAGE AND ARREST SAID PLATEN COVER BEFORE SAID PAD REACHES SAID CUSHION CYLINDER.
Claim 2
Dependent Claim
159 words
IN A METAL FORMING APPARATUS FOR USE WITH A DROP HAMMER OR SIMILAR PERCUSSIVE MACHINES, A CUSHION CYLINDER HAVING ONE CLOSED END, A GUIDE BLOCK SECURED TO THE OTHER END OF SAID CYLINDER, A PISTON WITHIN SAID CYLINDER, MEANS TO ADMIT FLUID BETWEEN SAID PISTON AND SAID CLOSED END, A VARIABLE RESTRICTED OUTLET FOR SAID FLUID, A PLURALITY OF PUSH RODS SLIDABLY PASSING THROUGH HOLES N SAID GUIDE BLOCK, THE LOWER ENDS OF SAID PUSH RODS RESTING ON SAID PISTON, A PLATEN SECURED TO THE UPPER ENDS OF SAID PUSH RODS, A MALE DIE SECURED TO SAID GUIDE BLOCK, SAID PLATEN HAVING A CLEARANCE HOLE TO FIT AROUND SAID MALE DIE, A PLATEN COVER HAVING A CLEARANCE HOLE, AN IMPACT PRESSURE HEAD COMPRISING A CYLINDER HAVING ONE CLOSED END, AND A RESILIENT PAD WITHIN SAID CYLINDER; SAID MALE DIE HAVING A STOP PORTION INCORPORATED THEREIN TO ENGAGE AND ARREST SAID PLATEN COVER BEFORE SAID PAD REACHES SAID CUSHION CYLINDER.
References Cited (Backward Citations)
CA488409A
Cited
US2605731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |