US3851366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of pulley manufacture
Assignee: EAST DAYTON TOOL AND DIE CO
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Filing: 1973-04-09
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Granted: 1974-12-03
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Expires: 1993-04-09
Abstract
Abstract Structure and methods for production of single and multiplegroove pulleys from cold deformable metal. Several steps are used in the formation of a pulley as a pulley is produced by progressive forming die members. During some of the first operations, several definite and critical break rings and angles are established in the blank so that in subsequent forming operations consistent desired shape can be obtained during collapsing of the metal.
Inventors
- 👤 O Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:56
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/26; B21D53/261; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49453; Y10T29/4946
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
117 words
The method of forming a V-belt pulley from a single sheet of metal, comprising: drawing the sheet to form a cup-shape blank having a base and a peripheral portion at spaced-apart positions, with a wall extending between the base and the peripheral portion and with a plurality of well-defined break rings separating angular portions in the wall, there being a cylindrical part and a frusto-conical part in the wall, separated by a break ring; followed by collapsing and folding, one against the other, said frusto-conical part of the wall and a cylindrical part of the wall to form an entire one side of a groove; another portion of the sheet forming the other side of the groove.
Claim 2
Independent Claim
117 words
The method of forming a V-belt pulley from a single sheet of metal, comprising: drawing the sheet to form a cup-shape blank having a base and a peripheral portion at spaced-apart positions, with a wall extending between the base and the peripheral portion and with a plurality of well-defined break rings separating angular portions in the wall, there being a cylindrical part and a frusto-conical part in the wall, separated by a break ring; followed by collapsing and folding, one against the other, said frusto-conical part of the wall and a cylindrical part of the wall to form an entire one side of a groove; another portion of the sheet forming the other side of the groove.
Claim 3
Dependent Claim
44 words
The method of claim 1 in which said drawing is followed by a second drawing which forms at least one more break ring in the wall between the base and the peripheral portion, prior to said collapsing and folding of parts of the wall.
Claim 4
Dependent Claim
95 words
The method of claim 2 in which the first drawing is followed by a second drawing, and in which the second drawing is followed by retaining the shape of the portion of the wall of the blank between the base and the break ring adjacent thereto and the shape of the wall portion of the blank between the peripheral portion and the break ring adjacent thereto, during collapsing and folding parts of the wall which are between the break ring which is adjacent the peripheral portion and the break ring which is adjacent the base.
Claim 5
Dependent Claim
73 words
The method of claim 1 in which the drawing is followed by retaining the shape of the wall between the peripheral portion and the break ring adjacent thereto and the shape of the wall between the peripheral portion and the break ring adjacent thereto while collapsing and folding parts of the wall which are between the break ring which is adjacent the peripheral portion and the break ring which is adjacent the base.
Claim 6
Dependent Claim
36 words
The method of claim 1 in which the parts of the wall which are collapsed and folded are the parts of the wall which are between the two break rings which are closest to the base.
Claim 7
Dependent Claim
47 words
The method of claim 1 in which the wall is provided with a groove while the part of the wall between two of the break rings is collapsed and folded, the groove being formed in the wall between the peripheral portion and the collapsed and folded part.
Claim 8
Dependent Claim
50 words
The method of claim 1 in which the wall is provided with a plurality of coaxial grooves while the part of the wall between two of the break rings is collapsed and folded, the grooves being formed in the wall between the peripheral portion and the collapsed and folded part.
Claim 9
Independent Claim
134 words
A method of producing a pulley having a peripheral groove adapted to receive an endless V-belt, comprising the steps of drawing a sheet of metal to form a cup portion surrounded by an outwardly projecting frusto-conical peripheral wall portion defining one side of the groove, said cup portion including a generally radial base surrounded by a cylindrical side wall portion having an outwardly projecting generally angular configuration in axial cross-section and defining a break ring, gripping said peripheral wall portion and said base with corresponding inner and outer die members, and moving said die members one toward the other to force said side wall portion outwardly and to fold said side wall at said break ring into a frusto-conical configuration defining the other side of said groove, while maintaining the cylindrical side wall portion.
Claim 10
Independent Claim
134 words
A method of producing a pulley having a peripheral groove adapted to receive an endless V-belt, comprising the steps of drawing a sheet of metal to form a cup portion surrounded by an outwardly projecting frusto-conical peripheral wall portion defining one side of the groove, said cup portion including a generally radial base surrounded by a cylindrical side wall portion having an outwardly projecting generally angular configuration in axial cross-section and defining a break ring, gripping said peripheral wall portion and said base with corresponding inner and outer die members, and moving said die members one toward the other to force said side wall portion outwardly and to fold said side wall at said break ring into a frusto-conical configuration defining the other side of said groove, while maintaining the cylindrical side wall portion.
Claim 11
Independent Claim
149 words
A method of producing a pulley having a peripheral groove adapted to receive an endless V-belt, comprising the steps of drawing a sheet of metal to form a cuP portion surrounded by an outwardly projecting frusto-conical peripheral wall portion defining one side of the groove, said cup portion including a generally radial end wall portion integrally connected to said peripheral wall portion by a generally cylindrical side wall portion and a frusto-conical side wall portion forming an outwardly projecting break ring, gripping said peripheral wall portion and said end wall portion with corresponding inner and outer die members, and moving said die members one toward the other to force said side wall portions outwardly and to fold said side wall portions at said break ring to form said side wall portions into a frusto-conical configuration defining the other side of said groove, while maintaining the cylindrical side wall portion.
Claim 12
Independent Claim
149 words
A method of producing a pulley having a peripheral groove adapted to receive an endless V-belt, comprising the steps of drawing a sheet of metal to form a cuP portion surrounded by an outwardly projecting frusto-conical peripheral wall portion defining one side of the groove, said cup portion including a generally radial end wall portion integrally connected to said peripheral wall portion by a generally cylindrical side wall portion and a frusto-conical side wall portion forming an outwardly projecting break ring, gripping said peripheral wall portion and said end wall portion with corresponding inner and outer die members, and moving said die members one toward the other to force said side wall portions outwardly and to fold said side wall portions at said break ring to form said side wall portions into a frusto-conical configuration defining the other side of said groove, while maintaining the cylindrical side wall portion.
Claim 13
Dependent Claim
80 words
A method as defined in claim 9 wherein said cup portion includes a first set of generally cylindrical and frusto-conical side wall portions defining a first outwardly projecting break ring and a second set of generally cylindrical and frusto-conical side wall portions defining a second outwardly projecting break ring and wherein each set of said side wall portions is folded outwardly at said corresponding break rings by moving corresponding die members together to form a pulley having two said grooves.
Claim 14
Independent Claim
155 words
The method of producing a wheel having a peripheral groove therein, comprising: drawing a sheet of metallic material into a cup shape member having a base and a peripheral portion with a side wall between the peripheral portion and the base, in which the side wall has a cylindrical wall portion extending from the base with a frusto-conical wall portion joined to the cylindrical wall portion and separated from the cylindrical wall portion by a break ring, and in which there is an intermediate wall portion between the peripheral portion and the frusto-conical wall portion, the intermediate portion being separated from the frusto-conical portion by a break ring; followed by folding the frusto-conical wall portion against the intermediate wall portion to form a wall portion of double thickness as one side of a groove; a wall portion adjacent the peripheral portion being retained during the folding operation to form the other side of the groove.
Claim 15
Independent Claim
155 words
The method of producing a wheel having a peripheral groove therein, comprising: drawing a sheet of metallic material into a cup shape member having a base and a peripheral portion with a side wall between the peripheral portion and the base, in which the side wall has a cylindrical wall portion extending from the base with a frusto-conical wall portion joined to the cylindrical wall portion and separated from the cylindrical wall portion by a break ring, and in which there is an intermediate wall portion between the peripheral portion and the frusto-conical wall portion, the intermediate portion being separated from the frusto-conical portion by a break ring; followed by folding the frusto-conical wall portion against the intermediate wall portion to form a wall portion of double thickness as one side of a groove; a wall portion adjacent the peripheral portion being retained during the folding operation to form the other side of the groove.
Claim 16
Dependent Claim
58 words
The method of claim 11 in which said drawing includes the formation of a second cylindrical wall portion between the peripheral portion and the frusto-conical wall portion; the second cylindrical wall portion being that wall portion which is folded against the frusto-conical wall portion to form a wall portion of double thickness as one side of a groove.
Claim 17
Independent Claim
329 words
The method of producing a wheel having a peripheral groove therein, comprising: drawing a sheet of metallic material into a cup shape member having a base and a peripheral portion with a side wall between the peripheral portion and the base, in which the side wall has a cylindrical wall portion extending from the base with a frusto-conical wall portion joined to the cylindrical wall portion and separated from the cylindrical wall portion by a break ring, and in which there is a break ring in a wall portion between the frusto conical wall portion and the peripheral portion; followed by folding the frusto-conical wall portion against an adjacent wall portion to form a wall portion of double thickness as one side of a groove; a wall portion adjacent the peripheral portion being retained during the folding operation to form the other side of the groove, said drawing including the formation of a second cylindrical wall portion which is joined to the frusto-conical wall portion by a break ring and in which said drawing includes the formation of a second frusto-conical wall portion which is joined to the second cylindrical wall portion by a break ring and in which a third cylindrical wall portion is joined to the second frusto-conical wall portion by a break ring and in which a third frusto-conical wall portion is joined to the third cylindrical wall portion by a break ring, the Third frusto-conical wall portion forming one side of a first groove; followed by collapsing the second frusto-conical wall portion and the third cylindrical wall portion so that the third cylindrical wall portion forms the other side of said first groove and so that the second frusto-conical wall portion forms one side of a second groove; followed by retaining the formation of the first groove while collapsing the second cylindrical wall portion and the first frusto-conical wall portion so that the second cylindrical wall portion forms the other side of the second groove.
Claim 18
Independent Claim
329 words
The method of producing a wheel having a peripheral groove therein, comprising: drawing a sheet of metallic material into a cup shape member having a base and a peripheral portion with a side wall between the peripheral portion and the base, in which the side wall has a cylindrical wall portion extending from the base with a frusto-conical wall portion joined to the cylindrical wall portion and separated from the cylindrical wall portion by a break ring, and in which there is a break ring in a wall portion between the frusto conical wall portion and the peripheral portion; followed by folding the frusto-conical wall portion against an adjacent wall portion to form a wall portion of double thickness as one side of a groove; a wall portion adjacent the peripheral portion being retained during the folding operation to form the other side of the groove, said drawing including the formation of a second cylindrical wall portion which is joined to the frusto-conical wall portion by a break ring and in which said drawing includes the formation of a second frusto-conical wall portion which is joined to the second cylindrical wall portion by a break ring and in which a third cylindrical wall portion is joined to the second frusto-conical wall portion by a break ring and in which a third frusto-conical wall portion is joined to the third cylindrical wall portion by a break ring, the Third frusto-conical wall portion forming one side of a first groove; followed by collapsing the second frusto-conical wall portion and the third cylindrical wall portion so that the third cylindrical wall portion forms the other side of said first groove and so that the second frusto-conical wall portion forms one side of a second groove; followed by retaining the formation of the first groove while collapsing the second cylindrical wall portion and the first frusto-conical wall portion so that the second cylindrical wall portion forms the other side of the second groove.
Claim 19
Independent Claim
149 words
The method of producing a grooved pulley from a sheet metal blank comprising the steps of grasping a peripheral portion of the blank while forming the central portion of the blank into a wall provided with a plurality of well-defined break rings and angular portions adjacent thereto, followed by collapsing a part of the wall so that folding action occurs between at least two of the well-defined break rings, the well-defined break rings including a break ring adjacent the peripheral portion and a break ring most remote from the peripheral portion and in which the collapsing occurs between the break ring which is adjacent the peripheral portion and the break ring which is most remote from the peripheral portion, there being a plurality of break rings established between the break ring which is adjacent the peripheral portion and the break ring which is most remote from the peripheral portion.
Claim 20
Independent Claim
149 words
The method of producing a grooved pulley from a sheet metal blank comprising the steps of grasping a peripheral portion of the blank while forming the central portion of the blank into a wall provided with a plurality of well-defined break rings and angular portions adjacent thereto, followed by collapsing a part of the wall so that folding action occurs between at least two of the well-defined break rings, the well-defined break rings including a break ring adjacent the peripheral portion and a break ring most remote from the peripheral portion and in which the collapsing occurs between the break ring which is adjacent the peripheral portion and the break ring which is most remote from the peripheral portion, there being a plurality of break rings established between the break ring which is adjacent the peripheral portion and the break ring which is most remote from the peripheral portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |