Patent US3718324A successfully refreshed from Google Patents.
US3718324A
Expired / Lapsed
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Vacuum furnace and work cart for use therein
Assignee: HAYES C INC US
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Filing: 1971-11-12
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Granted: 1973-02-27
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Expires: 1991-11-12
Abstract
Abstract A high vacuum electric furnace for heat treating metallic articles having a work cart mounted for movement therein and including a heating chamber for receiving said work cart during the heat treating operation, said work cart having heat shielding means fixed thereto, and roller assembles located in said furnace over which said work cart moves for transfer to and from said heating chamber.
Inventors
- 👤 V Scotto
- 👤 W Vanderford
- 👤 H Westeren
- 👤 W Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:45
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C21D1/773
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A vacuum furnace construction, comprising a housing having a heating zone and a transfer zone located in adjacent relation, a work cart mounted for movement in said housing to anD from said heating and transfer zones, means located in said zones on which said work cart is moved, said heating zone including insulating side walls in which horizontal slots are formed through which a portion of said work cart extends when it is moved into said heating zone, and means secured to said cart for shielding the slots to prevent heat loss therethrough when the work cart is located in said heating zone.
Claim 2
Dependent Claim
103 words
A vacuum furnace construction, comprising a housing having a heating zone and a transfer zone located in adjacent relation, a work cart mounted for movement in said housing to anD from said heating and transfer zones, means located in said zones on which said work cart is moved, said heating zone including insulating side walls in which horizontal slots are formed through which a portion of said work cart extends when it is moved into said heating zone, and means secured to said cart for shielding the slots to prevent heat loss therethrough when the work cart is located in said heating zone.
Claim 3
Dependent Claim
71 words
A vacuum furnace construction as set forth in claim 1, said work cart being defined by a u-shaped frame having parallel legs, said means on which work cart is moved including a plurality of rollers mounted in fixed position in said housing in horizontal spaced relation, each of the legs of the work cart having a channel configuration for receiving said rollers therein and for facilitating movement of said work cart.
Claim 4
Dependent Claim
53 words
A vacuum furnace construction as set forth in claim 2, said work cart having a plurality of cross bars interconnected to said legs for receiving a work basket thereon, said cross bars defining the portion of the work cart that extends through said slots in the insulating side walls of said heating zone.
Claim 5
Dependent Claim
52 words
A vacuum furnace as set forth in claim 3, said shielding means including a plurality of heat shields fixed to the legs of said work cart and being disposed in shielding position relative to the slots in the insulating side walls of said heating zone when said work cart is located therein.
Claim 6
Dependent Claim
55 words
A vacuum furnace as set forth in claim 4, said heat shields including outer elements spaced inwardly of said work cart legs and outwardly of said insulating side walls, and inner elements being spaced inwardly of said outer elements and being receivable in said slots when said work cart is located in said heating zone.
Claim 7
Dependent Claim
62 words
A vacuum furnace as set forth in claim 1, said work cart including side legs that are normally located exteriorly of the insulating side walls when the work cart is positioned in said heating zone, cross bars interconnecting said legs and extending through the slots in said side walls, said shielding means being interconnected to said side legs for shielding said slots.
Claim 8
Dependent Claim
31 words
A vacuum furnace as set forth in claim 6, said shielding means including a plurality of heat shields that are plate-like in conformation and that are positioned in spaced, parallel relation.
Claim 9
Dependent Claim
31 words
A vacuum furnace as set forth in claim 7, a first set of heat shields located exteriorly of the side walls of said heating zone in adjacent relation to said slots.
Claim 10
Dependent Claim
66 words
A vacuum furnace as set forth in claim 8, a second set of heat shields interconnected to said legs and being disposed inwardly of said first set of heat shields and being receivable in the slots in the side walls of said heating zone when the work cart is located therein, wherein radiation of heat through said slots is effectively prevented during a heat treating operation.
References Cited (Backward Citations)
US3441452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |