US3680348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable draw die
Assignee: INTERNATIONAL LIGHT METALS Corp
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Filing: 1970-04-06
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Granted: 1972-08-01
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Expires: 1990-04-06
Abstract
Abstract An apparatus for drawing T-shaped members using a die assembly having a pair of die blocks each constructed to adjustably engage two adjoining sides of the members to be drawn. These die blocks can be adjusted simultaneously to uniformly vary the thickness of both the stem and head of a T-bar being drawn.
Inventors
- 👤 Fernando J Nino
- 👤 Donald Q Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:12
CPC Classifications
B; B21; B21C; B21C3/00; B21C3/02; B21C3/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
153 words
An adjustable die suitable for drawing T-bars without prior size reduction of one end of the work piece to be drawn, which comprises: a. A body having a cavity extending axially therethrough; b. A base die block positioned within said cavity; c. A pair of upper die blocks within said cavity, co-acting with said base die block to form a die opening, each upper die block having a slanted side and being axially and radially slideable within the cavity of said body; d. A pair of wedge members, each positioned intermediate said body and one of said upper die blocks, and each having a slanted side in frictional engagement with a corresponDing slanted side of one of said upper die blocks; whereby axial sliding movement of an upper die block effects radial displacement thereof, thereby changing the size of the die opening through which both head and stem of a T-bar are drawn.
Claim 2
Dependent Claim
153 words
An adjustable die suitable for drawing T-bars without prior size reduction of one end of the work piece to be drawn, which comprises: a. A body having a cavity extending axially therethrough; b. A base die block positioned within said cavity; c. A pair of upper die blocks within said cavity, co-acting with said base die block to form a die opening, each upper die block having a slanted side and being axially and radially slideable within the cavity of said body; d. A pair of wedge members, each positioned intermediate said body and one of said upper die blocks, and each having a slanted side in frictional engagement with a corresponDing slanted side of one of said upper die blocks; whereby axial sliding movement of an upper die block effects radial displacement thereof, thereby changing the size of the die opening through which both head and stem of a T-bar are drawn.
Claim 3
Dependent Claim
58 words
The adjustable die of claim 1, wherein each of the wedge members have a slanted side engaging a corresponding slanted side of the body whereby axial sliding movement of a wedge member effects radial displacement of its companion die block changing the size of the die opening through which both head and stem of the T-bar is drawn.
Claim 4
Dependent Claim
29 words
The adjustable die of claim 1, further comprising detachable cover plates partially closing open ends of the cavity and limiting movement of the die blocks and wedge members therein.
Claim 5
Dependent Claim
29 words
The adjustable die of claim 3, further comprising wedge adjustment means extending through at least one cover plate and adapted to engage the wedge members for axial adjustment thereof.
Claim 6
Dependent Claim
22 words
The adjustable die of claim 4, wherein the wedge adjustment means extends through and is in threaded engagement with both cover plates.
Claim 7
Dependent Claim
26 words
The adjustable die of claim 2, further comprising transmission means for cooperatively and simultaneously moving upper die blocks to effect uniform adjustment of the die opening.
Claim 8
Dependent Claim
25 words
The adjustable die of claim 6, wherein the transmission means operatively engages wedge adjustment means to effect simultaneous radial adjustment of both upper die blocks.
Claim 9
Dependent Claim
34 words
The adjustable die of claim 1, wherein a wedge member is positioned intermediate the body and the base die block whereby to effect a change in the thickness of the T-bar head being drawn.
Claim 10
Dependent Claim
27 words
The adjustable die of claim 5, wherein the wedge adjustment means and transmission means are adjustable during drawing to produce a taper in a workpiece being drawn.
Claim 11
Dependent Claim
23 words
An adjustable die of claim 1, further comprising gripper means for holding the end of the workpiece being drawn through the die opening.
Claim 12
Dependent Claim
41 words
The adjustable die of claim 10, wherein the gripper means detachably engages the upper die blocks and moves them axially within the body until contact is made with a cover plate whereupon the gripper means detaches from the upper die blocks.
Claim 13
Dependent Claim
46 words
The adjustable die of claim 1, wherein each of the upper die blocks is adjustable radially at an angle of 26* 34'' with the plane of the T-bar stem, whereby to uniformly vary the thickness of both the stem and head of the T-bar being drawn.
Claim 14
Dependent Claim
25 words
The adjustable die of claim 12, further comprising transmission means for cooperatively moving upper die blocks simultaneously to effect uniform adjustment of the die opening.
Claim 15
Dependent Claim
18 words
The adjustable die of claim 1, wherein said base die block has parallel sides and is immovable radially.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |