Patent US193764A successfully refreshed from Google Patents.
Patent US4243266A successfully refreshed from Google Patents.
US3962899A
Expired / Lapsed
US
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Method and apparatus for making an eccentric locking collar
Assignee: Torrington Co Ltd
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Filing: 1975-03-26
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Granted: 1976-06-15
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Expires: 1995-03-26
Abstract
Abstract The invention contemplates low-cost and improved manufacture of an eccentric locking collar, as for use in securing a bearing ring or the like to a shaft. The locking collar is made by cold-forming a cylindrical metal blank with an eccentric cylindrical recess at one end and with a concentric cylindrical recess at the other end. A coining tool having the desired locking surface profile is inserted into the eccentric bore and is driven in axial compression causing blank material to flow or extrude around the profile. Thereafter, a punching operation completes definition of the concentric cylindrical bore which is ultimately to accommodate assembly to a shaft, and finishing steps are performed, such as set-screw adapting and tumbling.
Inventors
- 👤 Henry Hubbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:56
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/02; B21K; B21K1/00; B21K1/76
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
168 words
The method of making an eccentric locking collar for locking a bearing ring or the like to a shaft, which comprises die-forming a blank of coinable metal into a cylindrical body having a central radial wall between opposed axially recessed and outwardly open end bores one of which is characterized generally cylindrical and eccentric and the other of which is concentric to the cylinder, thereby defining projecting body annuli at the ends of the blank, the eccentric-bore formation involving insertion of a die element into the blank, said die element being selected for a blank-working profile characterized by a radially outward arcuate projection fully contained within the blank-insertion region and said projection being angularly oriented for minimal radial offset from the concentric-bore axis, so that the body annulus of the eccentric bore is the result of coining into local conformity with said profile, and punching out of the central radial wall a cylindrical bore concentric with the body-cylinder axis and of radius to clear the coined eccentric bore.
Claim 2
Independent Claim
168 words
The method of making an eccentric locking collar for locking a bearing ring or the like to a shaft, which comprises die-forming a blank of coinable metal into a cylindrical body having a central radial wall between opposed axially recessed and outwardly open end bores one of which is characterized generally cylindrical and eccentric and the other of which is concentric to the cylinder, thereby defining projecting body annuli at the ends of the blank, the eccentric-bore formation involving insertion of a die element into the blank, said die element being selected for a blank-working profile characterized by a radially outward arcuate projection fully contained within the blank-insertion region and said projection being angularly oriented for minimal radial offset from the concentric-bore axis, so that the body annulus of the eccentric bore is the result of coining into local conformity with said profile, and punching out of the central radial wall a cylindrical bore concentric with the body-cylinder axis and of radius to clear the coined eccentric bore.
Claim 3
Dependent Claim
14 words
The method of claim 1, in which the coinable metal is plain carbon steel.
Claim 4
Dependent Claim
22 words
The method of claim 1, in which the eccentric end bore is of larger diameter than that of the concentric end bore.
Claim 5
Dependent Claim
23 words
The method of claim 1, in which the punch-out radius of the last step is substantially the radius of the concentric end bore.
Claim 6
Independent Claim
199 words
The method of making an eccentric locking collar for locking a bearing ring or the like to a shaft, which comprises die-forming a blank of coinable metal into a cylindrical body having a central radial wall between opposed axially recessed and outwardly open cylindrical end bores one which is eccentrically relieved and the other of which is concentric to the cylinder, thereby defining projecting body annuli at the ends of the blank, the eccentric-bore formation involving insertion of a die element axially into the blank, said die element being selected for a blank-working profile characterized by a radially outwardly projecting arcuate undercut-forming eccentric surface within the blank-insertion region, the arcuate surface of the die element being so angularly oriented that said arcuate surface is at lesser radial extent with respect to the axis of the concentric bore than is the remainder of the blank-insertion region of said die element, so that the projecting body annulus of the eccentric bore is the result of coining into local conformity with the eccentric portion of said profile, and punching out of the central radial wall a cylindrical bore concentric with the body-cylinder axis and of radius to clear the coined eccentric bore.
Claim 7
Independent Claim
199 words
The method of making an eccentric locking collar for locking a bearing ring or the like to a shaft, which comprises die-forming a blank of coinable metal into a cylindrical body having a central radial wall between opposed axially recessed and outwardly open cylindrical end bores one which is eccentrically relieved and the other of which is concentric to the cylinder, thereby defining projecting body annuli at the ends of the blank, the eccentric-bore formation involving insertion of a die element axially into the blank, said die element being selected for a blank-working profile characterized by a radially outwardly projecting arcuate undercut-forming eccentric surface within the blank-insertion region, the arcuate surface of the die element being so angularly oriented that said arcuate surface is at lesser radial extent with respect to the axis of the concentric bore than is the remainder of the blank-insertion region of said die element, so that the projecting body annulus of the eccentric bore is the result of coining into local conformity with the eccentric portion of said profile, and punching out of the central radial wall a cylindrical bore concentric with the body-cylinder axis and of radius to clear the coined eccentric bore.
Claim 8
Dependent Claim
20 words
The method of claim 5, in which the axis offset for each of the two eccentricities is substantially the same.
Claim 9
Independent Claim
207 words
The method of making an eccentric locking collar for locking a bearing ring or the like to a shaft, which comprises die-forming a blank of coinable metal into a cylindrical body having a central radial wall between opposed axially recessed and outwardly open cylindrical end bores one of which is eccentrically relieved and the other of which is concentric to the cylinder, thereby defining projecting body annuli at the ends of the blank, the eccentric-bore formation involving insertion of a die element axially into the blank, said die element being selected for a blank-working profile characterized by a radially outwardly projecting arcuate undercut-forming eccentric surface defining an open arcuate eccentric groove within the bore-insertion region, the arcuate eccentric groove of the die element being so angularly oriented that said arcuate surface is at lesser radial extent with respect to the axis of the concentric bore than is the remainder of the blank-insertion region of the die element, so that the projecting body annulus of the eccentric bore is the result of coining into local conformity with the eccentric portion of said profile, and punching out of the central radial wall a cylindrical bore concentric with the body-cylinder axis and of radius to clear the coined eccentric bore.
Claim 10
Independent Claim
207 words
The method of making an eccentric locking collar for locking a bearing ring or the like to a shaft, which comprises die-forming a blank of coinable metal into a cylindrical body having a central radial wall between opposed axially recessed and outwardly open cylindrical end bores one of which is eccentrically relieved and the other of which is concentric to the cylinder, thereby defining projecting body annuli at the ends of the blank, the eccentric-bore formation involving insertion of a die element axially into the blank, said die element being selected for a blank-working profile characterized by a radially outwardly projecting arcuate undercut-forming eccentric surface defining an open arcuate eccentric groove within the bore-insertion region, the arcuate eccentric groove of the die element being so angularly oriented that said arcuate surface is at lesser radial extent with respect to the axis of the concentric bore than is the remainder of the blank-insertion region of the die element, so that the projecting body annulus of the eccentric bore is the result of coining into local conformity with the eccentric portion of said profile, and punching out of the central radial wall a cylindrical bore concentric with the body-cylinder axis and of radius to clear the coined eccentric bore.
Claim 11
Dependent Claim
30 words
The method of claim 7, in which the body of the die element is cylindrical and the projecting arcuate surface is within the geometric axial projection of the cylindrical body.
Claim 12
Dependent Claim
27 words
The method of claim 8, in which the limited arcuate extent of the arcuate surface and groove are approximately one half the periphery of the die element.
Claim 13
Dependent Claim
30 words
The method of claim 7, in which the groove has a generally conical surface sloped with increasing radius in the axial direction of the insertion end of the die element.
Claim 14
Dependent Claim
27 words
The method of claim 7, in which the maximum depth of the groove is of substantially the same extent as the eccentric offset of the two bores.
Claim 15
Dependent Claim
21 words
The method of claim 11, in which the groove is arcuate about the cylindrical axis of the body of the die.
Claim 16
Dependent Claim
127 words
Tool structure for use in forming an "undercut" eccentric-locking surface in a coinable workpiece of cylindrical external shape and having an eccentric bore at one axial end, said structure comprising a work-supporting body having a first bore of diameter to coaxially support the work-piece and having a communicating guide bore eccentric to the first bore, anvil means within said first bore to support the workpiece at its other axial end, the eccentric work bore being contained within the body bore, and die means including a coining-punch element reciprocably guided by the eccentric guide bore, said punch element having a radially outwardly projecting "undercut"-characterizing formation of limited arcuate extent and enterable into the workpiece, when the workpiece is axially compressed between said die means and said anvil means.
Claim 17
Dependent Claim
127 words
Tool structure for use in forming an "undercut" eccentric-locking surface in a coinable workpiece of cylindrical external shape and having an eccentric bore at one axial end, said structure comprising a work-supporting body having a first bore of diameter to coaxially support the work-piece and having a communicating guide bore eccentric to the first bore, anvil means within said first bore to support the workpiece at its other axial end, the eccentric work bore being contained within the body bore, and die means including a coining-punch element reciprocably guided by the eccentric guide bore, said punch element having a radially outwardly projecting "undercut"-characterizing formation of limited arcuate extent and enterable into the workpiece, when the workpiece is axially compressed between said die means and said anvil means.
Claim 18
Dependent Claim
46 words
Tool structure according to claim 13, in which the characterized arcuate projecting formation terminates at substantially diametrically opposed locations, thereby providing draft clearance for transverse displacement of the workpiece with respect to the first-bore axis upon die-projected displacement of the workpiece out of the first bore.
Claim 19
Dependent Claim
22 words
Tool structure according to claim 14, in which said terminations are essentially tangential to the arc of said characterized arcuate projecting formation.
Claim 20
Dependent Claim
73 words
An "undercut"-forming tool, comprising a cylindrical body, one end of which is characterized by a first limited arcuate projection within the geometrical projection of the cylinder of said body, said projection being spaced from the cylindrical body by a correspondingly arcuate groove, said end being further characterized by a bevel of arcuate extent generally diametrically opposite to said projection and of axial extent approximately the combined axial extent of the groove and projection.
Claim 21
Dependent Claim
73 words
An "undercut"-forming tool, comprising a cylindrical body, one end of which is characterized by a first limited arcuate projection within the geometrical projection of the cylinder of said body, said projection being spaced from the cylindrical body by a correspondingly arcuate groove, said end being further characterized by a bevel of arcuate extent generally diametrically opposite to said projection and of axial extent approximately the combined axial extent of the groove and projection.
Claim 22
Dependent Claim
13 words
The tool of claim 16, in which said arcuate extents are generally equal.
Claim 23
Dependent Claim
31 words
The tool of claim 16, in which the groove has a generally conical contour of slope approximating that of said bevel, thereby affording draft clearance for tool removal from a workpiece.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |