US3745873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bullet mold
Assignee: Individual
•
Filing: 1971-08-03
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Granted: 1973-07-17
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Expires: 1991-08-03
Abstract
Abstract A bullet mold is provided with two block-like halves which are formed as part of an extruded aluminum bar, cut off, and then reversed to form a complimentary matching pair. Mating V-grooves and raised ribs disposed along the longitudinal edges of the inner mold block faces provide ease of transverse location. Pin and groove means provide longitudinal location. Longitudinal air vents are disposed proximate the mating V-grooves and ribs, and the planular mating faces are knurled to provide fine vent grooves leading from the mold cavity to the longitudinal vents. The sprue plate is held in position by a wave washer to eliminate undesirable torque. The mold cavity is formed by rotating the clamped halves in a screw machine spindle and using appropriate tools.
Inventors
- 👤 R Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:13
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/22
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A bullet mold comprising: a. a clamping device having a pair of facing relatively movable clamping members, b. and a pair of complimentary opposed mold blocks loosely mounted to said clamping members and pivotable relative thereto and movable thereby into and out of closed mating position, c. each of said mold blocks having a longitudinally extending bullet molding cavity portion which mates with the cavity portion of the other block when the mold is closed to form a complete molding cavity, d. first cooperative locator means disposed on the inner facing portions of said pair of mold blocks for locating said pivotable blocks transversely when the mold is closed, e. and second cooperative locator means disposed on the inner facing portions of said pair of mold blocks for locating said pivotable blocks longitudinally when the mold is closed.
Claim 2
Dependent Claim
138 words
A bullet mold comprising: a. a clamping device having a pair of facing relatively movable clamping members, b. and a pair of complimentary opposed mold blocks loosely mounted to said clamping members and pivotable relative thereto and movable thereby into and out of closed mating position, c. each of said mold blocks having a longitudinally extending bullet molding cavity portion which mates with the cavity portion of the other block when the mold is closed to form a complete molding cavity, d. first cooperative locator means disposed on the inner facing portions of said pair of mold blocks for locating said pivotable blocks transversely when the mold is closed, e. and second cooperative locator means disposed on the inner facing portions of said pair of mold blocks for locating said pivotable blocks longitudinally when the mold is closed.
Claim 3
Dependent Claim
78 words
The bullet mold of claim 1 wherein said first locator means comprises: a. a groove disposed along one longitudinal edge of the inner face of each said mold block, b. and a raised rib disposed along the other longitudinal edge of the inner face of each said mold block, c. the rib on each block being disposed opposite the groove of the other block so that the respective ribs and grooves complimentingly mate when the mold is closed.
Claim 4
Dependent Claim
57 words
The bullet mold of claim 1 wherein said second locator means comprises: a. a transverse groove extending across the inner face of each said mold block, with said grooves in facing positions, b. and a locator pin disposed in one of said grooves and adapted to enter the other of said grooves when the mold is closed.
Claim 5
Dependent Claim
34 words
The bullet mold of claim 3 wherein: a. the groove within which said pin is located is deeper than the other of said grooves, b. and said pin is press-fit into its respective groove.
Claim 6
Dependent Claim
25 words
The bullet mold of claim 2 which includes: vent means for providing escape of air from said cavity as it is filled with molten metal.
Claim 7
Dependent Claim
96 words
The bullet mold of claim 5 wherein the inner facing portions of each said mold block are provided with matable generally planular faces, and wherein said air vent means comprises: a. a plurality of closely spaced diagonally extending grooves disposed in said faces and communicating with said cavity, b. and a longitudinal venting groove extending parallel to and proximate the root of each said raised rib and communicating with said diagonal extending grooves, c. said venting grooves forming with the respective opposite block faces a pair of open-ended air venting channels when the mold is closed.
Claim 8
Dependent Claim
149 words
A bullet mold comprising: a. a clamping device having a pair of facing relatively movable clamping members, b. and a pair of complimentary opposed mold blocks loosely mounted to said clamping members and pivotable relative thereto and movable thereby into and out of closed mating position, c. each of said mold blocks having a longitudinally extending bullet molding cavity portion which mates with the cavity portion of the other block when the mold is closed to form a complete molding cavity, d. cooperative locator means disposed on the inner facing portions of said pair of pivotable mold blocks for locating said blocks transversely and longitudinally when the mold is closed, e. a sprue plate disposed at the end of one of said blocks and having a sprue movable into alignment with said cavity, f. and torque-less means for mounting said sprue plate on the said one of said blocks.
Claim 9
Dependent Claim
149 words
A bullet mold comprising: a. a clamping device having a pair of facing relatively movable clamping members, b. and a pair of complimentary opposed mold blocks loosely mounted to said clamping members and pivotable relative thereto and movable thereby into and out of closed mating position, c. each of said mold blocks having a longitudinally extending bullet molding cavity portion which mates with the cavity portion of the other block when the mold is closed to form a complete molding cavity, d. cooperative locator means disposed on the inner facing portions of said pair of pivotable mold blocks for locating said blocks transversely and longitudinally when the mold is closed, e. a sprue plate disposed at the end of one of said blocks and having a sprue movable into alignment with said cavity, f. and torque-less means for mounting said sprue plate on the said one of said blocks.
Claim 10
Dependent Claim
47 words
The mold of claim 7 wherein said torque-less means comprises: a. a screw extending through said sprue plate into the end of the said one of said blocks, b. and an annular uninterrupted undulating wave washer disposed between the head of said screw and said sprue plate.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |