US4566519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a connecting rod
Assignee: Honda Motor Co Ltd
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Filing: 1982-12-02
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Granted: 1986-01-28
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Expires: 2002-12-02
Abstract
Abstract A method of making a connecting rod for an internal combustion engine which includes shaping a bundle of unidirectional inorganic fibers, placing the bundle into a shaping container and heating it partially in order to fuse the fibers to each other. The partially fused bundle is positioned in a mold in such a manner to produce an extra gap for a predetermined machining allowance between the bundles and cavities. A molten light metal alloy is squeeze cast into the mold under high pressure, i.e., 500-2000 kg/cm 3 , forming a matrix annular layer around the bundle. The rod portion of the obtained connecting rod is machined to remove defects in casting, such as a fatigue crack, a blow-hole or mixing of oxidated substances and takes the shape of a circular or elliptical cross-section.
Inventors
- 👤 Keisuke Ban
- 👤 Yasuo Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
F; F16; F16C; F16C7/00; F16C7/02; F16C7/023; B; B22; B22D; B22D18/00; B22D18/02; B22D19/00; B22D19/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A method of making a connecting rod for an internal combustion engine, the rod having a smaller annular end portion, a larger end portion, and a rod portion therebetween, the rod portion having a longitudinal axis, the method comprising the steps of: shaping a bundle of inorganic reinforcing fibers; placing the bundle in a mold, the mold having cavities to form the annular end portions and a rod portion having a circular cross-section, the bundle being placed along the longitudinal axis of the rod portion cavity, the mold being sized such that there is a predetermined near uniform annular gap between the bundle and the cavity wall for the rod portion; squeeze casting a molten light metal alloy into the mold, forming a matrix annular layer of the alloy around the bundle in said gap; machining the matrix annular layer to a predetermined shape thereby removing a predetermined machining allowance from the rod portion.
Claim 2
Independent Claim
154 words
A method of making a connecting rod for an internal combustion engine, the rod having a smaller annular end portion, a larger end portion, and a rod portion therebetween, the rod portion having a longitudinal axis, the method comprising the steps of: shaping a bundle of inorganic reinforcing fibers; placing the bundle in a mold, the mold having cavities to form the annular end portions and a rod portion having a circular cross-section, the bundle being placed along the longitudinal axis of the rod portion cavity, the mold being sized such that there is a predetermined near uniform annular gap between the bundle and the cavity wall for the rod portion; squeeze casting a molten light metal alloy into the mold, forming a matrix annular layer of the alloy around the bundle in said gap; machining the matrix annular layer to a predetermined shape thereby removing a predetermined machining allowance from the rod portion.
Claim 3
Dependent Claim
45 words
The method of claim 1, wherein the step of shaping bundle includes, forming bundle of a plurality of uni-directional inorganic fibers, placing the bundle in a heat-resistant shaping container, and heating the contained bundle to at least partially fuse the inorganic fibers to each other.
Claim 4
Dependent Claim
47 words
The method of claim 1, wherein the step of squeeze casting includes applying a hydrostatic high pressure of from about 500 to about 2000 kg/cm 2 to a molten light metal alloy poured into the mold, and solidifying the molten light metal alloy under such high pressure.
Claim 5
Dependent Claim
16 words
The method of claim 2, wherein the heating step is at a temperature of 700° C.
Claim 6
Dependent Claim
15 words
The method of claim 2, wherein the bundle is shaped to have a circular cross-section.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |