Patent US3930462A successfully refreshed from Google Patents.
US3930462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry dip tank
Assignee: RTX Corp
•
Filing: 1975-05-08
•
Granted: 1976-01-06
•
Expires: 1995-05-08
Abstract
Abstract An enclosure designed to maintain the purity and physical characteristics of a slurry within a preferred range during the manufacture of shell molds is disclosed. The tank is in the form of a trough with flat side walls and a curved member forming the front, bottom and back of the trough. The entire trough is water cooled and a cover along the top completes the enclosure. The enclosure is fitted with means for circulating the slurry and a liner having an airfoil member. Various sensing and control means are interconnected through a feedback system which continuously monitors and controls the conditions of the slurry.
Inventors
- 👤 Edward G. Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:13
CPC Classifications
B; B22; B22C; B22C13/00; B22C13/08; B22C13/085; G; G05; G05D; G05D27/00; G05D27/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A tank assembly for maintaining a slurry used in the formation of a shell mold over a pattern comprising: a tank; a removable, resilient liner which conforms to the general internal contour of the tank and fits into the tank; pump means which extend into the tank for circulating slurry contained by the liner; and said liner including a wing type airfoil member extending across the liner, at an intermediate vertical position thereof and spaced from the bottom, whereby to enhance said circulation.
Claim 2
Dependent Claim
83 words
A tank assembly for maintaining a slurry used in the formation of a shell mold over a pattern comprising: a tank; a removable, resilient liner which conforms to the general internal contour of the tank and fits into the tank; pump means which extend into the tank for circulating slurry contained by the liner; and said liner including a wing type airfoil member extending across the liner, at an intermediate vertical position thereof and spaced from the bottom, whereby to enhance said circulation.
Claim 3
Dependent Claim
47 words
The invention according to claim 1 wherein the tank is in the shape of a trough comprising a first and a second flat vertical side and a curved member which extends between the sides along its entire length from the front to the back of the trough.
Claim 4
Dependent Claim
18 words
The invention according to claim 2 including further a cover which fits across the top of the trough.
Claim 5
Dependent Claim
20 words
The invention according to claim 2 wherein the side profile of the curved member is an arc of constant radius.
Claim 6
Dependent Claim
13 words
The invention according to claim 1 including further means for cooling the trough.
Claim 7
Dependent Claim
15 words
The invention according to claim 5 including further means for injecting water into the slurry.
Claim 8
Dependent Claim
24 words
The invention according to claim 6 including further means for sensing the temperature of slurry in the trough and providing a slurry temperature signal.
Claim 9
Dependent Claim
25 words
The invention according to claim 6 including further means for sensing the density of the slurry in the trough and providing a slurry density signal.
Claim 10
Dependent Claim
25 words
The invention according to claim 6 including further means for sensing the viscosity of the slurry in the trough and providing a slurry viscosity signal.
Claim 11
Dependent Claim
25 words
The invention according to claim 6 including further means for sensing the level of the slurry in the trough and providing a slurry level signal.
Claim 12
Dependent Claim
67 words
The invention according to claim 1 including further a data response and control unit adapted to receive at least one signal from temperature, density, viscosity and level sensing means associated with said tank and slurry, to compare said at least one signal with a preselected range of values and, responsive to a signal of said comparater, to actuate a control means for maintaining said slurry control signals.
References Cited (Backward Citations)
US1988955A
Cited
US1861142A
Cited
US2127413A
Cited
US2222630A
Cited
US2819188A
Cited
US3196038A
Cited
US3671298A
Cited
US3892197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |