Patent US3842639A successfully refreshed from Google Patents.
US3842639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side-shifting mill roll
Assignee: MESTA ENGINEERING COMPANY APARTNERSHIP OF PA
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Filing: 1973-06-20
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Granted: 1974-10-22
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Expires: 1993-06-20
Abstract
Abstract Mill roll changing apparatus for positioning transversely of a rolling mill pass line and arranged for receiving and inserting mill rolls relative to a juxtaposed mill stand comprises a movable floor section normally covering a roll changing pit adjacent the mill stand, a support structure for the floor section and positionable within the pit, and a number of rails on the floor section. Driving mechanism is provided for moving the floor section laterally of the support structure in a direction generally parallel to the mill pass line so that selected pairs of the floor section rails can be laterally aligned with a pair of rails within the mill stand. An elevating mechanism mountable within the pit is structured for elevating the floor section to a first position above an existing floor surrounding the pit so that the floor section can be moved laterally thereof and to a second position whereat the floor section is flush with the existing floor and to a third position whereat the floor section is recessed within the roll-changing pit.
Inventors
- 👤 A Petros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:47
CPC Classifications
B; B21; B21B; B21B31/00; B21B31/08; B21B31/10; B21B31/103
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
Mill roll changing apparatus for positioning transversely of a rolling mill pass line and arranged for receiving and inserting mill rolls relative to a juxtaposed mill stand, said apparatus comprising a movable floor section normally covering a roll changing pit adjacent said mill stand, a support structure for said floor section and positionable within said pit, a number of rails on said floor section, driving mechanism for moving said floor section laterally of said support structure in a direction generally parallel to said pass line so that selected pairs of said rails can be laterally aligned with a pair of rails within said mill stand, and an elevating mechanism mountable within said pit and structured for elevating said floor section to a first position above an existing floor surrounding said pit so that said floor section can be moved laterally thereof and to a second position whereat said floor section is flush with said existing floor and to a third position whereat said floor section is recessed within said pit.
Claim 2
Dependent Claim
170 words
Mill roll changing apparatus for positioning transversely of a rolling mill pass line and arranged for receiving and inserting mill rolls relative to a juxtaposed mill stand, said apparatus comprising a movable floor section normally covering a roll changing pit adjacent said mill stand, a support structure for said floor section and positionable within said pit, a number of rails on said floor section, driving mechanism for moving said floor section laterally of said support structure in a direction generally parallel to said pass line so that selected pairs of said rails can be laterally aligned with a pair of rails within said mill stand, and an elevating mechanism mountable within said pit and structured for elevating said floor section to a first position above an existing floor surrounding said pit so that said floor section can be moved laterally thereof and to a second position whereat said floor section is flush with said existing floor and to a third position whereat said floor section is recessed within said pit.
Claim 3
Dependent Claim
17 words
The combination according to claim 1 wherein said floor section rails are machined into the surface thereof.
Claim 4
Dependent Claim
19 words
The combination according to claim 1 wherein said driving mechanism is mounted on said support structure for movement therewith.
Claim 5
Dependent Claim
22 words
The combination according to claim 1 wherein said elevating mechanism includes at least one pair of piston-cylinder arrangements mounted back to back.
Claim 6
Dependent Claim
82 words
The combination according to claim 1 wherein said pit is elongated in a direction transversely of said mill pass line and extends beneath said existing floor, and guideways are mounted in said pit and beneath said existing floor, said guideways being aligned with the lowermost position of said floor section, and traction means are provided for drawing said floor section and its support along said guideways to a position beneath said existing floor and away from the open area of said pit.
Claim 7
Dependent Claim
56 words
The combination according to claim 5 wherein said pit is shaped to receive a lower backup roll assembly from said mill stand and said traction means are coupled to said lower assembly for drawing said assembly into said pit simultaneously with withdrawal of said floor section and said support to their position beneath said existing floor.
Claim 8
Dependent Claim
43 words
The combination according to claim 5 wherein said support structure is coupled to said traction means through a sliding pedestal and sleeve arrangement so that said support structure and said floor section remain coupled to said traction means irrespective of the elevation thereof.
Claim 9
Dependent Claim
22 words
The combination according to claim 5 wherein said driving mechanism is mounted on the underside of said support structure for movement therewith.
Claim 10
Dependent Claim
39 words
The combination according to claim 8 wherein said elevating means include a pair of elevating mechanisms spaced laterally of one another and of the central area of said pit in order to accommodate passage of said driving mechanism therebetween.
Claim 11
Dependent Claim
32 words
The combination according to claim 1 wherein said driving mechanism includes rack and pinion means mounted on said floor section and support structure and extending generally parallel to said mill pass line.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |