Patent US1081849A successfully refreshed from Google Patents.
US5536089A
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Method of producing a component having at least one split running face for rolling elements
Assignee: Sintermetallwerk Krebsoege GmbH
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Filing: 1994-01-26
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Granted: 1996-07-16
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Expires: 2014-01-26
Abstract
Abstract A component having a split running face for rolling elements, running face being disposed partially on a bearing cap, and a method of producing the same. According to the method, a preform is made from a material having a carbon content of at least 0.5 percent by weight; the preform is separated by fracture separation at a separation location of the preform thereby producing the bearing cap and a remainder; skin layer hardening is performed on the running face thereby producing a skin hardened layer such that the running face acquires a Rockwell hardness of 55 according to the Rockwell cone method.
Inventors
- 👤 Manfred Weber
- 👤 Harald Neubert
- 👤 Uwe Eilrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:08
CPC Classifications
F; F16; F16C; F16C9/00; F16C9/04; B; B22; B22F; B22F5/00; B22F5/003; B23; B23D; B23D31/00; B23D31/002; B23D31/003; B23P; B23P25/00; C; C21; C21D; C21D1/00; C21D1/06; C21D9/00; C21D9/0068; F16C19/00; F16C19/22; F16C19/44; F16C19/46; F16C33/00; F16C33/30; F16C33/58; F16C33/60; F16C9/045; B22F2998/00; C21D1/09; C21D1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49288
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
102 words
A method of producing a component having a split running face for rolling elements, the running face being disposed partially on a bearing cap, comprising the steps of: making a preform from a material having a carbon content of at least 0.5 percent by weight; separating the preform by fracture separation at a separation location of the preform thereby producing the bearing cap and a remainder which includes the running face; performing skin layer hardening on the running face thereby producing a skin hardened layer such that the running face acquires a Rockwell hardness of 55 according to the Rockwell cone method.
Claim 2
Independent Claim
102 words
A method of producing a component having a split running face for rolling elements, the running face being disposed partially on a bearing cap, comprising the steps of: making a preform from a material having a carbon content of at least 0.5 percent by weight; separating the preform by fracture separation at a separation location of the preform thereby producing the bearing cap and a remainder which includes the running face; performing skin layer hardening on the running face thereby producing a skin hardened layer such that the running face acquires a Rockwell hardness of 55 according to the Rockwell cone method.
Claim 3
Dependent Claim
17 words
The method according to claim 1, wherein the step of making includes the step of utilizing powder-metallurgy.
Claim 4
Dependent Claim
18 words
The method according to claim 1, wherein the step of performing is performed before the step of separating.
Claim 5
Dependent Claim
18 words
The method according to claim 1, wherein the step of performing is performed after the step of separating.
Claim 6
Dependent Claim
22 words
The method according to claim 1, further including the step of precision-fittingly processing the running face by mechanically superfinishing the running face.
Claim 7
Dependent Claim
37 words
The method according to claim 1, further including the step of detachably connecting the bearing cap to the remainder after the step of separating, wherein the step of performing is performed after the step of detachably connecting.
Claim 8
Dependent Claim
47 words
The method according to claim 1, further including the step of: making a fracture-initiating notch at the separation location of the preform before the step of separating; and removing the notch essentially completely after the step of separating by mechanically processing the bearing cap and the remainder.
Claim 9
Dependent Claim
18 words
The method according to claim 7, wherein the step of performing is performed after the step of removing.
Claim 10
Dependent Claim
26 words
The method according to claim 8, further including the step precision-fittingly processing the running face by mechanically superfinishing the running face after the step of removing.
Claim 11
Dependent Claim
66 words
The method according to claim 7, wherein the step of making a fracture-initiating notch includes the step of making a fracture-initiating notch having a depth smaller than a depth of the skin hardened layer, wherein the method further includes the step of precision-fittingly processing the running face by mechanically superfinishing the running face, wherein the step of removing is performed during the step of precision-fittingly processing.
Claim 12
Dependent Claim
34 words
The method according to claim 1, wherein the step of making a preform includes the step of making a preform from a material having a carbon content of 0.5 to 1 percent by weight.
Claim 13
Dependent Claim
30 words
The method according to claim 1, wherein the step of making includes the step of making a preform from a material having a carbon content of 0.7 percent by weight.
Claim 14
Dependent Claim
62 words
The method according to claim 1, wherein the step of making includes the step of making a preform by sinter-forging, the method further including the steps of: making a fracture-initiating notch at the separation location of the preform before the step of forging; and making a protective layer over the notch for closing the notch essentially completely during the step of forging.
Claim 15
Dependent Claim
26 words
The method according to claim 1, wherein the step of performing includes the step of performing skin layer hardening on the running face by induction hardening.
Claim 16
Dependent Claim
24 words
The method according to claim 1, further including the step of making a connecting rod having a split connecting rod head as the component.
Claim 17
Dependent Claim
85 words
A component made of a material having a carbon content of at least 0.5 percent by weight and comprising: a split running face for rolling elements, the running face being disposed partially on a bearing cap; a hardened layer having a Rockwell hardness of at least 55 according to the Rockwell cone method disposed on at least a region of the running face; and a separation surface between the bearing cap and the component produced by fracture separation of the bearing cap from the component.
Claim 18
Dependent Claim
85 words
A component made of a material having a carbon content of at least 0.5 percent by weight and comprising: a split running face for rolling elements, the running face being disposed partially on a bearing cap; a hardened layer having a Rockwell hardness of at least 55 according to the Rockwell cone method disposed on at least a region of the running face; and a separation surface between the bearing cap and the component produced by fracture separation of the bearing cap from the component.
Claim 19
Dependent Claim
20 words
The component according to claim 16, wherein the material has a carbon content of 0.5 to 1 percent by weight.
Claim 20
Dependent Claim
18 words
The component according to claim 16, wherein the material has a carbon content of 0.7 percent by weight.
Claim 21
Dependent Claim
13 words
The component according to claim 16, wherein the material is a sintered material.
Claim 22
Dependent Claim
19 words
The component according to claim 16, wherein the component is a connecting rod having a split connecting rod end.
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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) | 1999-07-16 | 2000-01-15 | 2000-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-16 | 2004-01-15 | 2004-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-16 | 2008-01-15 | 2008-07-16 | $7700.00 | Window Closed / Lapsed |