US3719214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Investing apparatus
Assignee: Precision Metalsmiths Inc
•
Filing: 1970-07-09
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Granted: 1973-03-06
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Expires: 1990-07-09
Abstract
Abstract Investing apparatus including a vacuum chamber in which flasks are filled with refractory slurry, a mixing kettle adapted to be charged with the materials required to make the slurry, and equipment for measuring out and charging into the kettle predetermined amounts of the slurry materials. A system for automatically controlling the operations of the apparatus is provided.
Inventors
- 👤 E Erndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:51
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/001; B; B22; B22C; B22C13/00; B22C13/08; B22C13/085; G05D11/02; G05D11/035
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
362 words
An investment apparatus comprising: a. a container for use in mixing refractory powder and liquid to make an investment slurry, b. power actuated mixing means in said container, c. powder supply means including a portable bin and a power driven feed member associated with said bin for assisting in discharging powder therefrom, d. a feed hopper for receiving powder discharged from said portable bin, said feed hopper having a discharge outlet and gate means selectively actuatable to open and close said outlet, e. a power driven feed member associated with said feed hopper for feeding powder through said discharge outlet when it has been opened by said gate means, f. weighing means for weighing out a desired amount of powder, said weighing means including a weigh hopper positioned to receive powder discharged from said feed hopper, g. control means in electrical circuit relation with said gate means, said power driven feed members and said weighing means for automatically closing said gate means and deactivating said feed members in response to a preselected weight of powder in said weigh hopper, h. vacuum transfer means for conveying the weighed amount of powder from said weigh hopper to said container, said transfer means including a conduit connected to said weigh hopper and to said container, a vacuum line communicable with said conduit so that the powder can be forced through said conduit into said container, and valve means in said conduit and said vacuum line, i. liquid supply means connected to said container for introducing a measured volume of liquid into said container, said liquid supply means including a liquid supply pipe, valve means in said pipe operable to open and close said pipe, and means responsive to a predetermined volume of liquid flow in said pipe for closing said valve means, j. means for placing said container under a vacuum during mixing of the slurry, k. a chamber in which flasks are filled with slurry, said chamber including an opening and a door for said opening, l. flask-filling means in said chamber, m. a vacuum line connected to said chamber and, n. means including a valve connecting said container to said flask filling means.
Claim 2
Dependent Claim
362 words
An investment apparatus comprising: a. a container for use in mixing refractory powder and liquid to make an investment slurry, b. power actuated mixing means in said container, c. powder supply means including a portable bin and a power driven feed member associated with said bin for assisting in discharging powder therefrom, d. a feed hopper for receiving powder discharged from said portable bin, said feed hopper having a discharge outlet and gate means selectively actuatable to open and close said outlet, e. a power driven feed member associated with said feed hopper for feeding powder through said discharge outlet when it has been opened by said gate means, f. weighing means for weighing out a desired amount of powder, said weighing means including a weigh hopper positioned to receive powder discharged from said feed hopper, g. control means in electrical circuit relation with said gate means, said power driven feed members and said weighing means for automatically closing said gate means and deactivating said feed members in response to a preselected weight of powder in said weigh hopper, h. vacuum transfer means for conveying the weighed amount of powder from said weigh hopper to said container, said transfer means including a conduit connected to said weigh hopper and to said container, a vacuum line communicable with said conduit so that the powder can be forced through said conduit into said container, and valve means in said conduit and said vacuum line, i. liquid supply means connected to said container for introducing a measured volume of liquid into said container, said liquid supply means including a liquid supply pipe, valve means in said pipe operable to open and close said pipe, and means responsive to a predetermined volume of liquid flow in said pipe for closing said valve means, j. means for placing said container under a vacuum during mixing of the slurry, k. a chamber in which flasks are filled with slurry, said chamber including an opening and a door for said opening, l. flask-filling means in said chamber, m. a vacuum line connected to said chamber and, n. means including a valve connecting said container to said flask filling means.
Claim 3
Dependent Claim
362 words
An investment apparatus comprising: a. a container for use in mixing refractory powder and liquid to make an investment slurry, b. power actuated mixing means in said container, c. powder supply means including a portable bin and a power driven feed member associated with said bin for assisting in discharging powder therefrom, d. a feed hopper for receiving powder discharged from said portable bin, said feed hopper having a discharge outlet and gate means selectively actuatable to open and close said outlet, e. a power driven feed member associated with said feed hopper for feeding powder through said discharge outlet when it has been opened by said gate means, f. weighing means for weighing out a desired amount of powder, said weighing means including a weigh hopper positioned to receive powder discharged from said feed hopper, g. control means in electrical circuit relation with said gate means, said power driven feed members and said weighing means for automatically closing said gate means and deactivating said feed members in response to a preselected weight of powder in said weigh hopper, h. vacuum transfer means for conveying the weighed amount of powder from said weigh hopper to said container, said transfer means including a conduit connected to said weigh hopper and to said container, a vacuum line communicable with said conduit so that the powder can be forced through said conduit into said container, and valve means in said conduit and said vacuum line, i. liquid supply means connected to said container for introducing a measured volume of liquid into said container, said liquid supply means including a liquid supply pipe, valve means in said pipe operable to open and close said pipe, and means responsive to a predetermined volume of liquid flow in said pipe for closing said valve means, j. means for placing said container under a vacuum during mixing of the slurry, k. a chamber in which flasks are filled with slurry, said chamber including an opening and a door for said opening, l. flask-filling means in said chamber, m. a vacuum line connected to said chamber and, n. means including a valve connecting said container to said flask filling means.
Claim 4
Dependent Claim
362 words
An investment apparatus comprising: a. a container for use in mixing refractory powder and liquid to make an investment slurry, b. power actuated mixing means in said container, c. powder supply means including a portable bin and a power driven feed member associated with said bin for assisting in discharging powder therefrom, d. a feed hopper for receiving powder discharged from said portable bin, said feed hopper having a discharge outlet and gate means selectively actuatable to open and close said outlet, e. a power driven feed member associated with said feed hopper for feeding powder through said discharge outlet when it has been opened by said gate means, f. weighing means for weighing out a desired amount of powder, said weighing means including a weigh hopper positioned to receive powder discharged from said feed hopper, g. control means in electrical circuit relation with said gate means, said power driven feed members and said weighing means for automatically closing said gate means and deactivating said feed members in response to a preselected weight of powder in said weigh hopper, h. vacuum transfer means for conveying the weighed amount of powder from said weigh hopper to said container, said transfer means including a conduit connected to said weigh hopper and to said container, a vacuum line communicable with said conduit so that the powder can be forced through said conduit into said container, and valve means in said conduit and said vacuum line, i. liquid supply means connected to said container for introducing a measured volume of liquid into said container, said liquid supply means including a liquid supply pipe, valve means in said pipe operable to open and close said pipe, and means responsive to a predetermined volume of liquid flow in said pipe for closing said valve means, j. means for placing said container under a vacuum during mixing of the slurry, k. a chamber in which flasks are filled with slurry, said chamber including an opening and a door for said opening, l. flask-filling means in said chamber, m. a vacuum line connected to said chamber and, n. means including a valve connecting said container to said flask filling means.
Claim 5
Dependent Claim
82 words
An apparatus as claimed in claim 1 including means for controlling the transfer of powder from said weigh hopper to said container comprising switch means and a timer in electrical circuit relation with said valve means of said vacuum transfer means, said timer being operable to maintain said vacuum transfer valve means in an open position for a predetermined period of time during which powder is transferred to said container and thereafter to cause said vacuum transfer valve means to be closed.
Claim 6
Dependent Claim
99 words
An apparatus as claimed in claim 2 including actuator means for moving said door of said chamber between open and closed positions, valving means located in said vacuum line connected to said chamber, means electrically connected to said valving means and operated in response to movement of said door to said closed position for causing said chamber to be placed under a vacuum, flask holding means movable into and out of said chamber through said opening, and means for moving said flask holding means out of said chamber in response to movement of said door to said open position.
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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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |