US3756582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust and charging hood for tilting furnace
Assignee: Hawley Manufacturing Corp
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Filing: 1971-10-01
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Granted: 1973-09-04
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Expires: 1991-10-01
Abstract
Abstract A fumes controlling hood for a melting furnace, the hood being constructed and arranged to envelop the conventional upwardly opening charging mouth of the furnace, the lid therefor and the lid-actuating post and being provided in its ceiling with a port registering with the furnace mouth and with a cover for the port mounted to swing about an axis coincident with the axis of movement of the lid, and a driver movable with the lid and establishing a driving connection with the cover so that the cover is moved with the lid to open the port when the furnace mouth is opened. The hood may be mounted on the furnace for shifting movement toward and away from its pouring spout. In those instances in which the furnace lid is raised before it is swung to open the mouth, the driver movable with the lid may establish such driving connection only as a result of such lid elevation. The conventional charging bucket may be modified by the provision of a removable closure for its open top and by the addition of a perimetral skirt which, when the valved bottom portion of the bucket has been entered through the hood port to rest on the furnace top in registry with the furnace mouth, will cover and substantially enclose the hood port. An exhaust system is provided to maintain a subatmospheric pressure within the hood; and when the furnace is of the tilting variety with a pouring spout, the exhaust system will include swivel connections and telescoping ducts permitting the hood to shift on the furnace and to tilt with the furnace in its shifted position. The hood may include a section movable about a vertical axis to provide greater access to the mouth of the furnace.
Inventors
- 👤 R Overmyer
- 👤 J Scheel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:23
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; C21C5/40; F27D17/304; F27D3/00; F27D3/0025; F27D1/00; F27D1/18; F27D1/1858; F27D2001/0079; F27D2001/0083; F27D2001/0086; F27D2001/0096; F27D99/00; F27D99/0073; F27D2099/0078; F27D2099/008; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
151 words
The combination with a furnace which is provided with an upwardly opening mouth, a lid for said mouth and means supporting said lid to swing, about a substantially vertical axis outside the boundary of said mouth, between a position in registry with said mouth and a position laterally removed from such registry, of a hood associated with said furnace and enclosing said mouth, said hood having a ceiling disposed above the uppermost position of said lid and said ceiling being formed with a port registering with said furnace mouth, a cover for said port, means supporting said cover from said hood to swing, about said axis, between closing and opening relation with said port, means moving with said lid to establish a driving connection between said lid and said cover, means establishing a region of subatmospheric pressure, and duct means establishing communication between said region and the interior of said hood.
Claim 2
Dependent Claim
151 words
The combination with a furnace which is provided with an upwardly opening mouth, a lid for said mouth and means supporting said lid to swing, about a substantially vertical axis outside the boundary of said mouth, between a position in registry with said mouth and a position laterally removed from such registry, of a hood associated with said furnace and enclosing said mouth, said hood having a ceiling disposed above the uppermost position of said lid and said ceiling being formed with a port registering with said furnace mouth, a cover for said port, means supporting said cover from said hood to swing, about said axis, between closing and opening relation with said port, means moving with said lid to establish a driving connection between said lid and said cover, means establishing a region of subatmospheric pressure, and duct means establishing communication between said region and the interior of said hood.
Claim 3
Dependent Claim
47 words
The combination of claim 1 in which said lid is mounted for vertical movement when in registry with said mouth and in which said means moving with said lid establishes such driving connection only when said lid has been raised out of closing relation with said mouth.
Claim 4
Dependent Claim
85 words
The combination of claim 1, and a charging bucket, said bucket having a valved floor and an open top, closure means for said bucket top, the lower portion of said bucket being proportioned and designed to pass through said port and to rest upon said furnace in registry with said mouth, and a perimetral skirt on said bucket intermediate the ends thereof and positioned substantially to bear upon said hood ceiling in enveloping relation to said port when said bucket so rests upon said furnace.
Claim 5
Dependent Claim
48 words
The combination of claim 1 in which said furnace is mounted for tilting about a substantially horizontal axis and is provided with a pouring spout, said hood being supported from said furnace to move therewith, and said duct means including a swivel connection coaxial with said horizontal axis.
Claim 6
Dependent Claim
85 words
The combination of claim 4, and a charging bucket, said bucket having a valved floor and an open top, closure means for said bucket top, the lower portion of said bucket being proportioned and designed to pass through said port and to rest upon said furnace in registry with said mouth, and a perimetral skirt on said bucket intermediate the ends thereof and positioned substantially to bear upon said hood ceiling in enveloping relation to said port when said bucket so rests upon said furnace.
Claim 7
Dependent Claim
37 words
The combination of claim 1 in which said furnace is also provided with a pouring spout on one side of said mouth, and means for moving said hood on said furnace toward and away from said spout.
Claim 8
Dependent Claim
44 words
The combination of claim 1 in which said furnace is provided with a pouring spout on one side of said mouth, and means for supporting said hood for movement on said furnace toward and away from said spout, and means for moving said hood.
Claim 9
Dependent Claim
58 words
The combination of claim 1 in which said hood includes a movable section mounted for swinging movement away from said mouth and about a second substanTially vertical axis, said section including a portion of said ceiling bounding a major portion of the periphery of said port and wall portions extending downwardly from said ceiling portion to said furnace.
Claim 10
Dependent Claim
41 words
The combination of claim 1 in which said furnace is mounted for tilting about a substantially horizontal axis and is provided with a pouring spout on one side of said mouth, said hood being mounted on said furnace for movement therewith.
Claim 11
Dependent Claim
68 words
The combination of claim 9 in which said hood includes a movable section mounted for swinging movement away from said mouth and about a second substantially vertical axis disposed generally on the opposite side of said mouth from said spout, said section including a portion of said ceiling bounding approximately one-half the periphery of said port and wall portions extending downwardly from said ceiling portion to said furnace.
Claim 12
Dependent Claim
19 words
The combination of claim 10, and a plurality of casters for movably supporting said movable section on said furnace.
Claim 13
Dependent Claim
69 words
The combination of claim 1 in which said hood is provided with wall sections on generally opposite sides of said mouth and extending from said ceiling to said furnace, one of said wall sections being formed with a generally horizontally elongated aperture through which said lid moves outwardly to its said laterally removed position, said duct means establishing communication with said hood at the other of said wall sections.
Claim 14
Dependent Claim
69 words
The combination of claim 9 in which said hood is provided with wall sections on generally opposite sides of said mouth and extending from said ceiling to said furnace, one of said wall sections being formed with a generally horizontally elongated aperture through which said lid moves outwardly to its said laterally removed position, said duct means establishing communication with said hood at the other of said wall sections.
Claim 15
Dependent Claim
31 words
The combination of claim 12 in which said furnace is provided with a pouring spout, and means for moving said hood on said furnace toward and away from said pouring spout.
Claim 16
Dependent Claim
28 words
The combination of claim 9, and means for supporting said hood for movement on said furnace toward and away from said spout, and means for moving said hood.
Claim 17
Dependent Claim
69 words
The combination of claim 15 in which said hood is provided with wall sections on generally opposite sides of said mouth and extending from said ceiling to said furnace, one of said wall sections being formed with a generally horizontally elongated aperture through which said lid moves outwardly to its said laterally removed position, said duct means establishing communication with said hood at the other of said wall sections.
Claim 18
Dependent Claim
68 words
The combination of claim 16 in which said hood includes a movable section mounted for swinging movement away from said mouth and about a second substantially vertical axis disposed generally on the opposite side of said mouth from said spout, said section including a portion of said ceiling bounding approximately one-half the periphery of said port and wall portions extending downwardly from said ceiling portion to said furnace.
Claim 19
Dependent Claim
98 words
The combination of claim 15 in which said duct means includes a first duct rigidly attached to said hood for movement therewith, said first duct extending horizontally outwardly on a second horizontal axis parallel to the tilt axis for said furnace, a second duct, a swivel connection between said first and second ducts providing for swivel movement about said second horizontal axis, a third duct mounted for swivel movement at one of its ends about a third horizontal axis parallel to said furnace tilt axis and telescopically connected at the other of its ends to said second duct.
Claim 20
Dependent Claim
53 words
The combination of claim 15 in which said hood is formed with an opening adjacent to and registering with said spout and an outwardly extending cover for said spout bounding said opening, said cover including an outwardly and upwardly extending top panel and a downwardly extending skirt at each side of said panel.
Claim 21
Dependent Claim
74 words
The combination of claim 15 in which said hood is formed with a wall section extending from said ceiling to said furnace adjacent said spout, said wall section being formed to provide an opening through which said spout extends and an outwardly extending cover for said spout, said opening being proportioned and designed such that, when said hood is retracted away from said spout, a portion of said lid extends outwardly through said opening.
Claim 22
Dependent Claim
121 words
The combination with a furnace which is provided with an upwardly opening mouth, a spout on one side of said mouth, and a lid for said mouth, and which is mounted for tilting about a substantially horizontal axis to pour from said spout, of means for shifting said lid transaxially into and out of registry with said mouth, a hood associated with said furnace and enclosing said mouth, said hood having a perimetral wall formed with an opening therein to permit partial passage of said lid therethrough when said lid is shifted out of registry with said mouth, means establishing a region of subatmospheric pressure, and duct means establishing and maintaining communication between said region and the interior of said hood.
Claim 23
Dependent Claim
121 words
The combination with a furnace which is provided with an upwardly opening mouth, a spout on one side of said mouth, and a lid for said mouth, and which is mounted for tilting about a substantially horizontal axis to pour from said spout, of means for shifting said lid transaxially into and out of registry with said mouth, a hood associated with said furnace and enclosing said mouth, said hood having a perimetral wall formed with an opening therein to permit partial passage of said lid therethrough when said lid is shifted out of registry with said mouth, means establishing a region of subatmospheric pressure, and duct means establishing and maintaining communication between said region and the interior of said hood.
Claim 24
Dependent Claim
126 words
The combination with a furnace which is provided with an upwardly opening mouth, a spout on one side of said mouth, and a lid for said mouth, and which is mounted for tilting about a substantially horizontal axis to pour from said spout, of a hood associated with said furnace and enclosing said mouth, means for mounting said hood for movement on said furnace toward and away from said spout, said hood including a downwardly-extending wall section formed to provide an opening through which said spout extends and an outwardly extending cover for said spout, and said cover including a top panel extending outwardly and upwardly from the top edge of said opening and side panels extending outwardly respectively from the side edges of said opening.
Claim 25
Dependent Claim
126 words
The combination with a furnace which is provided with an upwardly opening mouth, a spout on one side of said mouth, and a lid for said mouth, and which is mounted for tilting about a substantially horizontal axis to pour from said spout, of a hood associated with said furnace and enclosing said mouth, means for mounting said hood for movement on said furnace toward and away from said spout, said hood including a downwardly-extending wall section formed to provide an opening through which said spout extends and an outwardly extending cover for said spout, and said cover including a top panel extending outwardly and upwardly from the top edge of said opening and side panels extending outwardly respectively from the side edges of said opening.
Claim 26
Dependent Claim
33 words
The combination of claim 22 in which the width of said opening is such that, when said hood is moved away from said spout, a portion of said lid extends through said opening.
Claim 27
Dependent Claim
57 words
The combination of claim 22 in which said cover is proportioned and designed such that, when said hood is moved away from said spout and said furnace is tilted to pour from said spout, said top panel and side panels define a downwardly opening duct generally in vertical registry with said spout to receive fumes arising therefrom.
Claim 28
Dependent Claim
98 words
The combination of claim 22 in which said duct means includes a first duct rigidly attached to said hood for movement therewith, said first duct extending horizontally outwardly on a second horizontal axis parallel to the tilt axis for said furnace, a second duct, a swivel connection between said first and second ducts providing for swivel movement about said second horizontal axis, a third duct mounted for swivel movement at one of its ends about a third horizontal axis parallel to said furnace tilt axis and telescopically connected at the other of its ends to said second duct.
Claim 29
Dependent Claim
59 words
The combination of claim 22 in which said duct means includes a pair of telescopically related ducts, one of said ducts being connected to said hood for swivel movement about an axis parallel to the tilt axis for said furnace and the other of said ducts being mounted for swivel movement about another axis parallel to said tilt axis.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |