US5075175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite bar structures of interlocked multiple members
Assignee: Kawasaki Motors Ltd
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Filing: 1989-07-12
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Granted: 1991-12-24
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Expires: 2009-07-12
Abstract
Abstract A composite bar structure is composed of at least outer and inner members extending parallelly in the longitudinal direction of the structure and joined mechanically at an interface therebetween in an interlocked. The structure is fabricated by forming a plurality of projections on the inner member over the entire interface, preparing the outer member in a tubular shape to readily encompass the inner member, relatively positioning the members to place the inner member within the outer member in telescoped state, and applying a constrictive compression force on the outer member so that it undergoes plastic deformation and reduction in diameter, whereby the projections bite into the inner surface of the outer member. The members are thus joined tightly to form the integral composite bar structure.
Inventors
- 👤 Shigetomo Matsui
- 👤 Takeshi Yamada
- 👤 Yasuhiro Kumon
- 👤 Makoto Ryoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:55
CPC Classifications
B; B21; B21K; B21K25/00; E; E02; E02D; E02D5/00; E02D5/02; E02D5/03; E02D5/04; B21C; B21C37/00; B21C37/04; B21C37/042; B21C37/045; E02D5/22; E02D5/24; E02D5/30; F; F16; F16B; F16B11/00; F16B11/002; F16B17/00; F16B17/004; F16B35/00; F16B43/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12264; Y10T428/12292; Y10T428/12382; Y10T428/12451; Y10T428/12486
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
A composite bar structure comprising: at least an outer member an inner member, said members extending parallely in a longitudinal direction of said structure; and said members being joined together mechanically at an interface therebetween by the interlocking of a plurality of projections formed integrally on one said member and spaced in the longitudinal and circumferential directions with respective recesses formed in the other said member at said interface over the entire expanse thereof, said interlocking projections and recesses being of a configuration and having mechanical characteristics resulting from the application of a constrictive compressive force to said outer member sufficient to cause said outer member to undergo plastic deformation and reduction in size and to cause said projections in said one member to penetrate into said other member and to form said recesses therein.
Claim 2
Dependent Claim
135 words
A composite bar structure comprising: at least an outer member an inner member, said members extending parallely in a longitudinal direction of said structure; and said members being joined together mechanically at an interface therebetween by the interlocking of a plurality of projections formed integrally on one said member and spaced in the longitudinal and circumferential directions with respective recesses formed in the other said member at said interface over the entire expanse thereof, said interlocking projections and recesses being of a configuration and having mechanical characteristics resulting from the application of a constrictive compressive force to said outer member sufficient to cause said outer member to undergo plastic deformation and reduction in size and to cause said projections in said one member to penetrate into said other member and to form said recesses therein.
Claim 3
Dependent Claim
40 words
A composite bar structure as claimed in claim 1 wherein each of said projections has, at a distal tip thereof, an overhanging head, and the respective recess has a corresponding shape, whereby a tight joint is obtained between the members.
Claim 4
Dependent Claim
21 words
A composite bar structure as claimed in claim 1 wherein said inner member is in the shape of a solid bar.
Claim 5
Dependent Claim
17 words
A composite bar structure as claimed in claim 1 wherein said inner member is of tubular shape.
Claim 6
Dependent Claim
20 words
A composite bar structure as claimed in claim 1 wherein said inner member comprises at least two spaced-apart parallel bars.
References Cited (Backward Citations)
US309439A
Cited
US312485A
Cited
US1622825A
Cited
US1209948A
Cited
US1610945A
Cited
US1680369A
Cited
US1692529A
Cited
US1939768A
Cited
US2157456A
Cited
US2236257A
Cited
US2262074A
Cited
US2285583A
Cited
US2490548A
Cited
US2505937A
Cited
US2793571A
Cited
US2888742A
Cited
US3529858A
Cited
US3691340A
Cited
US4005991A
Cited
US4154900A
Cited
JPS55139540A
Cited
JPS61161796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |