US4090734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcement member for an automobile door
Assignee: Nissan Motor Co Ltd
•
Filing: 1976-09-24
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Granted: 1978-05-23
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Expires: 1996-09-24
Abstract
Abstract A reinforcement member for an automobile door is constructed of a central piece formed from a plate of a high tensile strength steel and two end pieces of a mild steel that is the same material as the material forming an inner panel of the automobile door. The two end pieces are secured to end portions of the central piece and formed with attachment areas, respectively, at which the reinforcement member is secured to the door inner panel.
Inventors
- 👤 Sumio Inami
- 👤 Kiyoshi Koike
- 👤 Masayoshi Hayashida
- 👤 Shigeyuki Yamaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:41
CPC Classifications
B; B60; B60J; B60J5/00; B60J5/04; B60J5/042; B60J5/0422; B60J5/0437; B60J5/0438; B60J5/0443; B60J5/0444; B60J5/0447
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
In an automobile: a door having an inner panel made of a mild steel; a reinforcement member having an elongated central piece made of a high tensile strength steel, the central piece having a cross section with an undulation and two end portions spaced from each other along a longitudinal direction of the central piece, and two end pieces made of a similar mild steel to the mild steel of which said inner panel is made, the two end pieces being secured to the central piece at the two end portions of the central piece, respectively, the two end pieces being formed with attachment areas, respectively, and being welded at that attachment areas to the inner panel of said door.
Claim 2
Dependent Claim
120 words
In an automobile: a door having an inner panel made of a mild steel; a reinforcement member having an elongated central piece made of a high tensile strength steel, the central piece having a cross section with an undulation and two end portions spaced from each other along a longitudinal direction of the central piece, and two end pieces made of a similar mild steel to the mild steel of which said inner panel is made, the two end pieces being secured to the central piece at the two end portions of the central piece, respectively, the two end pieces being formed with attachment areas, respectively, and being welded at that attachment areas to the inner panel of said door.
Claim 3
Dependent Claim
27 words
The combination as claimed in claim 1, in which crests of the undulation on one side of the central piece are bridged by at least one plate.
Claim 4
Dependent Claim
28 words
The combination as claimed in claim 2, in which crests of the undulation on the opposite side of the central pieces are bridged by at least one plate.
References Cited (Backward Citations)
US3263387A
Cited
DE1959988A1
Cited
DE1962279A1
Cited
US3938288A
Cited
US3868796A
Cited
DE2319124A1
Cited
DE2426705A1
Cited
US3964208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |