| Title of Invention | A PRODUCTION PROCESS FOR MANUFACTURING A LEAF SPRING FOR A VEHICLE |
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| Abstract | A leaf spring for vehicle capable of increasing a durability even if an inexpensive spring steel such as SUP9 and SUP11 is used as a material, wherein, while a spring body made of a spring steel having a Brinell hardness of 388 HBW to less than 555 HBW (Brinell ball dent diameter of 3.10 mm to less than 2.70 mm) is kept at a temperature of 150 to 400 °C, a first shot peening is applied to the tensile stress acting surface of the spring body with a load given thereto in the same direction as that for using the spring body (FIG. - 1) |
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679-kolnp-2004-granted-abstract.pdf
679-kolnp-2004-granted-assignment.pdf
679-kolnp-2004-granted-claims.pdf
679-kolnp-2004-granted-correspondence.pdf
679-kolnp-2004-granted-description (complete).pdf
679-kolnp-2004-granted-drawings.pdf
679-kolnp-2004-granted-examination report.pdf
679-kolnp-2004-granted-form 1.pdf
679-kolnp-2004-granted-form 18.pdf
679-kolnp-2004-granted-form 3.pdf
679-kolnp-2004-granted-form 5.pdf
679-kolnp-2004-granted-gpa.pdf
679-kolnp-2004-granted-letter patent.pdf
679-kolnp-2004-granted-reply to examination report.pdf
679-kolnp-2004-granted-specification.pdf
| Patent Number | 221107 | |||||||||||||||
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| Indian Patent Application Number | 00679/KOLNP/2004 | |||||||||||||||
| PG Journal Number | 25/2008 | |||||||||||||||
| Publication Date | 20-Jun-2008 | |||||||||||||||
| Grant Date | 18-Jun-2008 | |||||||||||||||
| Date of Filing | 24-May-2004 | |||||||||||||||
| Name of Patentee | NHK SPRING CO, LTD. | |||||||||||||||
| Applicant Address | 10 FUKUURA 3-CHOME KANAZAWA-KU, YOKOHAMA -SHI KANGAWA 236-0004 | |||||||||||||||
Inventors:
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| PCT International Classification Number | B24C 1/10 | |||||||||||||||
| PCT International Application Number | PCT/JP02/12552 | |||||||||||||||
| PCT International Filing date | 2002-11-29 | |||||||||||||||
PCT Conventions:
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