US3859016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder metallurgy composite
Assignee: Amsted Industries Inc
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Filing: 1973-04-06
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Granted: 1975-01-07
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Expires: 1993-04-06
Abstract
Abstract A bi-metallic powder metal compact is formed by filling a die cavity with at least two different kinds of metal powder separated by divider means which are then withdrawn from the die cavity so that the powders in the cavity may be compacted in the usual manner. One or a plurality of mated bottom punches fill the cavity until a shoe, which is fed from an external source, carrying the separated different kinds of powder is correctly positioned above the cavity. The punches are then withdrawn to the same or different depths as desired, and the shoe is then removed so that the powders may be compressed in the cavity by a top punch and by said bottom punches.
Inventors
- 👤 Sherwood W Mcgee
- 👤 James H Mikoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:51
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
192 words
In apparatus for producing a bi-metallic powdered metal compact; the combination of a die with a cavity extending therethrough, punch means closing the bottom of said cavity, a hollow shoe fed with powders from an external source slideably seated on the die above the cavity, a blade mounted in the shoe for movement toward and away from said punch means, said blade dividing the interior of said shoe into spaced compartments containing, respectively, metallic powders having different characteristics, actuating means mounted on the shoe for moving the blade toward the punch means into tight engagement therewith as the punch means are retracted from the cavity to permit the powders to enter the cavity at opposite sides of the blade, said blade snugly engaging opposite sides of the cavity to prevent mixing of the powders entering the cavity, and actuating means mounted on the shoe for retracting the blade from said cavity after the powders have entered the cavity, said shoe being moveable in a direction parallel to the plane of the blade from said cavity with the blade retracted to accommodate compression of the powders in said cavity against said punch means.
Claim 2
Dependent Claim
192 words
In apparatus for producing a bi-metallic powdered metal compact; the combination of a die with a cavity extending therethrough, punch means closing the bottom of said cavity, a hollow shoe fed with powders from an external source slideably seated on the die above the cavity, a blade mounted in the shoe for movement toward and away from said punch means, said blade dividing the interior of said shoe into spaced compartments containing, respectively, metallic powders having different characteristics, actuating means mounted on the shoe for moving the blade toward the punch means into tight engagement therewith as the punch means are retracted from the cavity to permit the powders to enter the cavity at opposite sides of the blade, said blade snugly engaging opposite sides of the cavity to prevent mixing of the powders entering the cavity, and actuating means mounted on the shoe for retracting the blade from said cavity after the powders have entered the cavity, said shoe being moveable in a direction parallel to the plane of the blade from said cavity with the blade retracted to accommodate compression of the powders in said cavity against said punch means.
Claim 3
Dependent Claim
60 words
Apparatus according to claim 1 wherein means are provided for vibrating the shoe parallel to the plane of the blade while the blade is in said cavity engaging said punch means, and wherein resiliently mounted plugs snugly fitted in side walls of the shoe from top to bottom thereof engage opposite edges, respectively, of the blade to accommodate such vibration.
Claim 4
Dependent Claim
70 words
Apparatus according to claim 1, wherein the blade actuating means are characterized by a power cylinder device having a piston pin, and wherein means are connected to the pin and the blade for accommodating movement of the device parallel to the plane of the blade, and wherein means are provided for accommodating movement of the shoe parallel to said plane without disengaging the blade from the shoe or the die.
Claim 5
Dependent Claim
55 words
Apparatus according to claim 1, wherein the punch means comprises separate punches engaging the blade and snugly fitted against each other and against the perimeter of said cavity and wherein one punch is urged further into the cavity relative to the other during compression of the powders to afford differential compression of the respective powders.
Claim 6
Dependent Claim
138 words
In apparatus for producing a bi-metallic powdered metal compact, the combination of means for inserting punch means into one end of a die cavity open at the opposite end thereof, means for inserting a divider into said opposite end and for engaging said punch means and for dividing the cavity into spaced compartments, loading means for loading respective compartments from said open end with metal powder having different characteristics, means for retracting the divider from said opposite end of the cavity, means for moving said loading means in a direction parallel to the plane of the divider to clear said opposite end of said cavity and means for inserting another punch means into said opposite end of the cavity and means for compressing said powder in said cavity between the first-mentioned punch means and the second-mentioned punch means.
Claim 7
Dependent Claim
138 words
In apparatus for producing a bi-metallic powdered metal compact, the combination of means for inserting punch means into one end of a die cavity open at the opposite end thereof, means for inserting a divider into said opposite end and for engaging said punch means and for dividing the cavity into spaced compartments, loading means for loading respective compartments from said open end with metal powder having different characteristics, means for retracting the divider from said opposite end of the cavity, means for moving said loading means in a direction parallel to the plane of the divider to clear said opposite end of said cavity and means for inserting another punch means into said opposite end of the cavity and means for compressing said powder in said cavity between the first-mentioned punch means and the second-mentioned punch means.
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |