US3659985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Presses
Assignee: Birmingham Small Arms Co Ltd
•
Filing: 1969-12-09
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Granted: 1972-05-02
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Expires: 1989-12-09
Abstract
Abstract A machine for compacting metal powder comprises a static frame, a die having a bore, a lower punch defining a receiving die cavity in the bore, an upper punch, an upper punch downwardly movable to enter the die cavity, and a reaction frame to which the lower punch is fixed slidably mounted on the static frame, the reaction frame and the lower punch being moved upwardly by a reaction force generated when the upper punch is moved downwardly. The die is moved upwardly after the die cavity has been filled with powder a distance at least equal to the upward movement of the lower punch completed before the upper punch enters the die cavity, and the die is moved downwardly after the upper punch has entered the die cavity.
Inventors
- 👤 Alec Frank Marshall
- 👤 Hugh Gordon Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:27
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; B22F3/03; B30; B30B; B30B11/00; B30B11/02; B22F2998/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
A machine for compacting metal powder comprising a static frame, a die having a bore therethrough, a lower punch extending into said bore which thereby forms a powder receiving die cavity in the bore, an upper punch, a reaction frame to which the lower punch is fixed slidably mounted in the static frame, firing means for moving said upper punch downwardly to enter the die cavity to compact the powder therein and for creating a reaction force on said reaction frame, said reaction frame and the lower punch affixed thereto being moved upwardly by said reaction force generated when the upper punch is moved downwardly in a powder compaction stroke, means to move the die upwardly after the die cavity has been filled with powder a distance at least equal to the upward movement of the lower punch completed before the upper punch enters the die cavity, and means to move the die downwardly a predetermined distance after the upper punch has entered the die cavity.
Claim 2
Dependent Claim
166 words
A machine for compacting metal powder comprising a static frame, a die having a bore therethrough, a lower punch extending into said bore which thereby forms a powder receiving die cavity in the bore, an upper punch, a reaction frame to which the lower punch is fixed slidably mounted in the static frame, firing means for moving said upper punch downwardly to enter the die cavity to compact the powder therein and for creating a reaction force on said reaction frame, said reaction frame and the lower punch affixed thereto being moved upwardly by said reaction force generated when the upper punch is moved downwardly in a powder compaction stroke, means to move the die upwardly after the die cavity has been filled with powder a distance at least equal to the upward movement of the lower punch completed before the upper punch enters the die cavity, and means to move the die downwardly a predetermined distance after the upper punch has entered the die cavity.
Claim 3
Dependent Claim
39 words
A machine for compacting metal powders according to claim 1 wherein a reversible fluid pressure operated linear actuator carried by the reaction frame is the means for moving the die upwardly and the means for moving the die downwardly.
Claim 4
Dependent Claim
29 words
A machine for compacting metal powder according to claim 1 having means to hold the die stationary whilst the upper punch completes its downward movement before entering the die.
Claim 5
Dependent Claim
43 words
A machine for compacting metal powder as defined in claim 1, comprising a first stop means on said reaction frame movable into the path of descent of the die for determining the powder filling position of said die relative to the lower punch.
Claim 6
Dependent Claim
50 words
A machine for compacting metal powder as defined in claim 4, comprising a second stop means on said reaction frame movable into the path of descent of said die for determining the distance between the lower punch and the upper surface of the die at the moment of final compaction.
References Cited (Backward Citations)
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US2796633A
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US2825092A
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US3571854A
Cited
US3452121A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |