Patent US3793868A successfully refreshed from Google Patents.
US3793868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Taper-rolling of metal
Assignee: Hille Engineering Co Ltd
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Filing: 1972-09-20
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Granted: 1974-02-26
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Expires: 1992-09-20
Abstract
Abstract A method of taper rolling for producing leaf springs and the like, including the step of reducing the width of the deformable blank, between a pair of auxiliary rolls, to a width somewhat less than the required final width so that during a final ''''pass'''' between a pair of main rolls the blank returns to the required final width as it is brought to the required taper form.
Inventors
- 👤 A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:05
CPC Classifications
B; B21; B21H; B21H7/00; B21H7/007; B21B; B21B2203/00; B21B2203/22; B21B31/00; B21B31/16; B21B31/20; B21B31/22; B21B31/28; B21B31/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
A method for the taper-rolling of metal including the steps of drawing a deformable blank between a pair of rolls and simultaneously controlling the position of at least one of said rolls in accordance with the linear movement of a drawbar for drawing said blank between the rolls, the deformable blank being drawn between the said rolls a number of times to reduce it to the required form, and before a final ''pass'' is effected the blank is reduced in width between a pair of auxiliary rolls to bring it to a width somewhat less than the required final width so that during the final ''pass'' between the first mentioned pair of rolls, that is to say the main rolls, the blank returns to said required final width as it is brought to the required final taper form.
Claim 2
Independent Claim
138 words
A method for the taper-rolling of metal including the steps of drawing a deformable blank between a pair of rolls and simultaneously controlling the position of at least one of said rolls in accordance with the linear movement of a drawbar for drawing said blank between the rolls, the deformable blank being drawn between the said rolls a number of times to reduce it to the required form, and before a final ''pass'' is effected the blank is reduced in width between a pair of auxiliary rolls to bring it to a width somewhat less than the required final width so that during the final ''pass'' between the first mentioned pair of rolls, that is to say the main rolls, the blank returns to said required final width as it is brought to the required final taper form.
Claim 3
Dependent Claim
63 words
The method according to claim 1, including the steps of advancing the drawbar a gradually greater distance to insert the deformable blank through the gap between the main rolls before successive ''passes'' therethrough, and controlling the movement of one of the rolls in accordance with the distance by which said drawbar has been advanced as the blank is drawn through the roll gap.
Claim 4
Dependent Claim
75 words
Apparatus for the taper-rolling of metal, the apparatus including a pair of main rolls, a drawbar for drawing a deformable blank between said main rolls, means for controlling the position of one of the rolls in accordance with the linear movement of said drawbar, and a pair of auxiliary rolls for bringing said deformable blank to a width somewhat less than the required final width before a final ''pass'' is effected between said main rolls.
Claim 5
Dependent Claim
75 words
Apparatus for the taper-rolling of metal, the apparatus including a pair of main rolls, a drawbar for drawing a deformable blank between said main rolls, means for controlling the position of one of the rolls in accordance with the linear movement of said drawbar, and a pair of auxiliary rolls for bringing said deformable blank to a width somewhat less than the required final width before a final ''pass'' is effected between said main rolls.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 3, in which the main rolls and said auxiliary rolls are freely rotatable.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 3, in which means for controlling the position of said one of the main rolls in accordance with the lineAr movement of the drawbar includes a template.
Claim 8
Dependent Claim
44 words
Apparatus according to claim 5, in which means for controlling the position of said one of the main rolls in accordance with the linear movement of the drawbar also includes a hydraulic ram connected to a wedge arrangement on which said roll is supported.
Claim 9
Dependent Claim
26 words
Apparatus according to claim 3, in which means are provided for laterally adjusting the drawbar so that selected portions of the main rolls can be employed.
Claim 10
Dependent Claim
30 words
Apparatus according to claim 3, in which the auxiliary rolls are carried by pivotally mounted levers so that they can be brought to their operative positions from retracted inoperative positions.
Claim 11
Dependent Claim
45 words
Apparatus according to claim 8, in which means for bringing said auxiliary rolls to their operative positions include a single hydraulic ram and also include wedge means capable of being brought to bear between ends of the pivotally mounted levers remote from the auxiliary rolls.
Claim 12
Dependent Claim
52 words
Apparatus according to claim 9, in which adjustment means are provided for adjusting the spacing between the auxiliary rolls when in their operative positions, said adjustment means taking the form of a screwthreaded adjustment for adjusting the travel of the wedge means into engagement between the ends of the pivotally mounted levers.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |