US4087084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for changing blast furnace tuyeres
Assignee: Grant Louis A Inc
•
Filing: 1977-08-24
•
Granted: 1978-05-02
•
Expires: 1997-08-24
Abstract
Abstract An apparatus for removing and replacing blast furnace tuyeres. The apparatus is indexed with the centerline of the tuyere and downcomer from the bustle pipe to permit removal and replacement of the blowpipe-elbow, tuyere and tuyere cooler.
Inventors
- 👤 Leo J. Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:03
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/16; C21B7/166
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
Apparatus for removing and replacing blast furnace tuyeres and attendant structure comprising: (a) mobile undercarriage means having uneven ground engaging jack means attached thereto to raise and lower said undercarriage to different fixed levels, (b) first subcarriage means mounted on said undercarriage movable longitudinally with respect thereto, (c) second subcarriage means mounted on said first subcarriage and movable laterally with respect to said first subcarriage and said undercarriage, (d) rotatable platform means mounted on said second subcarriage means and rotatable in relation to said subcarriages and undercarriage means, and (e) an elongated member movable longitudinally on said rotatable platform means and adapted to carry tool means at each end, and hammer means for impacting said elongated member so as to vibrate it longitudinally.
Claim 2
Dependent Claim
123 words
Apparatus for removing and replacing blast furnace tuyeres and attendant structure comprising: (a) mobile undercarriage means having uneven ground engaging jack means attached thereto to raise and lower said undercarriage to different fixed levels, (b) first subcarriage means mounted on said undercarriage movable longitudinally with respect thereto, (c) second subcarriage means mounted on said first subcarriage and movable laterally with respect to said first subcarriage and said undercarriage, (d) rotatable platform means mounted on said second subcarriage means and rotatable in relation to said subcarriages and undercarriage means, and (e) an elongated member movable longitudinally on said rotatable platform means and adapted to carry tool means at each end, and hammer means for impacting said elongated member so as to vibrate it longitudinally.
Claim 3
Dependent Claim
23 words
Apparatus of claim 1 in which the means for impacting said elongated member are adjusted to impact it in one longitudinal direction only.
Claim 4
Dependent Claim
47 words
Apparatus of claim 1 in which said tool means comprise catch means for withdrawing a tuyere from a tuyere cavity, said tuyere withdrawing means being mounted on an end of said elongated member so as to be vibrated by said hammer means away from said tuyere cavity.
Claim 5
Dependent Claim
51 words
Apparatus of claim 3 in which the tuyere withdrawing means comprise an arm pivotally mounted adjacent the end of said elongated member so as to extend forward of that pivot and terminating in a catch which overlies the inside end of a tuyere when said arm is inserted into said tuyere.
Claim 6
Dependent Claim
44 words
Apparatus of claim 1 in which said tool means comprise cutter means for removing slag from a tuyere cavity, said cutter means being mounted on an end of said elongated member so as to be vibrated by said hammer means toward said tuyere cavity.
Claim 7
Dependent Claim
59 words
Apparatus of claim 5 in which said slag cutter means comprise cutter tools mounted on the outer ends of toggles pivoted forwardly of the end of said elongated member and means for rotating those toggles so as to force said cutter tools into slag accumulations in a tuyere cavity when said cutter means are advanced into a tuyere cooler.
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) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |