US3741701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame for producing casting flasks
Assignee: Individual
•
Filing: 1971-06-11
•
Granted: 1973-06-26
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Expires: 1991-06-11
Abstract
Abstract A frame for producing casting flasks is provided with pin-andsocket means for locating fixedly within the frame a model to be impressed within a flask.
Inventors
- 👤 A Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
B; B29; B29C; B29C33/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
In combination: a open ended boxing frame having all inner wall surfaces parallel to the axis of the cavity of said frame to receive rubber-like impression material; a screw member passing through a wall of said boxing frame into its cavity; a sprue-former and a model to be reproduced located wholly within said cavity; and inter engaged pin-and-socket means within said cavity joining said sprue-former and said screw to fixedly support said sprueformer and model on the axis of said screw within the frame cavity.
Claim 2
Dependent Claim
85 words
In combination: a open ended boxing frame having all inner wall surfaces parallel to the axis of the cavity of said frame to receive rubber-like impression material; a screw member passing through a wall of said boxing frame into its cavity; a sprue-former and a model to be reproduced located wholly within said cavity; and inter engaged pin-and-socket means within said cavity joining said sprue-former and said screw to fixedly support said sprueformer and model on the axis of said screw within the frame cavity.
Claim 3
Dependent Claim
25 words
Structure according to claim 1 in which the socket is carried by the screw member and the sprue-former includes a pin seating in said socket.
Claim 4
Dependent Claim
25 words
Structure according to claim 1 in which the socket is carried by the sprue-former and the screw member includes a pin seating in said socket.
Claim 5
Dependent Claim
31 words
Structure according to claim 1 in which the sprue-former comprises a pin and the inner end of the screw member is conical and has a central socket to receive said pin.
Claim 6
Dependent Claim
19 words
Structure according to claim 3 in which the sprue-former includes a conical base having the socket axially located therein.
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |