US3831410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for rolling mills
Assignee: Individual
•
Filing: 1973-07-09
•
Granted: 1974-08-27
•
Expires: 1993-07-09
Abstract
Abstract In a rolling mill, particularly a multistand rolling mill for the drawing of metal rods and the like, the improvement consisting in a safety device provided on at least the last stand and consisting of the shearable means securing the outlet guide for the rolled material to the same stand, whereby when the shearable fixing means are subjected to a thrust greater than a predetermined value, the outlet guide is separated from the rolling stand and engages switch means by which the drive to the rolling stands is disengaged.
Inventors
- 👤 I Properzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:23
CPC Classifications
B; B21; B21B; B21B33/00; B21B1/00; B21B1/16; B21B39/00; B21B39/14; B21B39/16; B21B39/165; F; F16; F16P; F16P5/00; F16P5/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A safety device for rolling mills arranged to interrupt the transmission of motion from the motor to the rolling stands, in which the outlet guide for the rolled material of at least the last stand of the rolling mill is fixed to the housing of the respective stand by fixing means arranged to allow the guide to separate from the housing when said fixing means are subjected to a thrust greater than a predetermined value, said outlet guide being arranged to engage switch means for interrupting the transmission of motion from the motor to the rolling stands.
Claim 2
Dependent Claim
97 words
A safety device for rolling mills arranged to interrupt the transmission of motion from the motor to the rolling stands, in which the outlet guide for the rolled material of at least the last stand of the rolling mill is fixed to the housing of the respective stand by fixing means arranged to allow the guide to separate from the housing when said fixing means are subjected to a thrust greater than a predetermined value, said outlet guide being arranged to engage switch means for interrupting the transmission of motion from the motor to the rolling stands.
Claim 3
Dependent Claim
41 words
A device as claimed in claim 1, in which said fixing means consist of screws having a weakened zone for starting the fracture when the outlet guide is thrust axially in a direction away from the housing of the rolling stand.
Claim 4
Dependent Claim
40 words
A device as claimed in cLaim 1, in which said outlet guide is slidably mounted in a bush fixed rigidly to the housing of the rolling stand, said guide being fixed to said bush by means of a shearable pin.
Claim 5
Dependent Claim
32 words
A device as claimed in claim 1, in which the outlet guides of all the rolling stands can be separated from their respective housings by a thrust acting axially on the guide.
Claim 6
Dependent Claim
23 words
A device as claimed in claim 1, in which all the rolling stands are provided with a separable outlet guide as heretofore claimed.
Claim 7
Dependent Claim
33 words
A device as claimed in claim 1, in which said switch means are connected so as to disengage the electromagnetic connecting clutch between the motor and drive pinion of the kinematic transmission chain.
References Cited (Backward Citations)
US1599045A
Cited
US3651674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |