US3824665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing an assembly of a metal tubing and serrated rod
Assignee: Nissan Motor Co Ltd
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Filing: 1972-10-13
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Granted: 1974-07-23
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Expires: 1992-10-13
Abstract
Abstract Herein disclosed are an improved method and apparatus for manufacturing an assembly of a hollow metal tubing and a rod having a serrated portion which is closely inserted into a reduced end portion of the tubing which has an inside diameter substantially larger than an outside diameter of the serrated portion of the rod. The rod is first loosely inserted through its serrated portion into the tubing and thereafter the reduced end portion of the tubing is radially squeezed by a swaging process so that the reduced end portion of the tubing is deformed under radial compression and closely fitted onto the serrated portion of the rod with an excess of wall of the reduced end flown into the grooves between the individual serrations of the rod. The assembly thus produced is specifically adapted to constitute a collapsible type steering column assembly which is used for the protection of a driver of a motor vehicle during a frontal collision.
Inventors
- 👤 S Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
B; B23; B23P; B23P11/00; B21; B21D; B21D39/00; B21D39/04; B62; B62D; B62D1/00; B62D1/02; B62D1/16; F; F16; F16D; F16D1/00; F16D1/02; F16D1/027; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885; Y10T29/49908; Y10T29/49925; Y10T29/49934; Y10T29/53; Y10T29/5367; Y10T29/53796; Y10T29/5383; Y10T29/53987; Y10T29/53996
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
An apparatus for forming an assembly of a hollow metal tubing and a metal rod having a serrated portion into said tubing which has a reduced end portion having an inside diameter appreciable larger than an outside diameter of said serrated portion of the rod, comprising a stationary die having an axial bore which at least partly has a diameter appreciably smaller than the outside diameter of said reduced end portion of said tubing, first driving means for forcing said tubiNg into said bore in said die, said tubing preliminarily relatively loosely receiving said serrated portion of the rod through said reduced end portion, a guide member having an axial bore which is substantially aligned with said bore in said die for guiding said rod and tubing when the tubing is being forced into said bore in the die, and second driving means for forcing the resultant assembly of the die and tubing out of said bore in the die.
Claim 2
Independent Claim
160 words
An apparatus for forming an assembly of a hollow metal tubing and a metal rod having a serrated portion into said tubing which has a reduced end portion having an inside diameter appreciable larger than an outside diameter of said serrated portion of the rod, comprising a stationary die having an axial bore which at least partly has a diameter appreciably smaller than the outside diameter of said reduced end portion of said tubing, first driving means for forcing said tubiNg into said bore in said die, said tubing preliminarily relatively loosely receiving said serrated portion of the rod through said reduced end portion, a guide member having an axial bore which is substantially aligned with said bore in said die for guiding said rod and tubing when the tubing is being forced into said bore in the die, and second driving means for forcing the resultant assembly of the die and tubing out of said bore in the die.
Claim 3
Dependent Claim
36 words
An apparatus as claimed in claim 1, in which said bore in said die has an outer enlarged portion having a diameter substantially equal to said outside diameter of said reduced end portion of said tubing.
Claim 4
Dependent Claim
29 words
An apparatus as claimed in claim 2, in which said outer enlarged portion of said bore in said die merges into an inner reduced portion through a circumferential chamfer.
Claim 5
Dependent Claim
21 words
An apparatus as claimed in claim 3, in which said chamfer has an angle ranging between about 30* and about 60*.
Claim 6
Dependent Claim
35 words
An apparatus as claimed in claim 3, in which said inner reduced portion of said bore in the die has a length substantially equal to a length of said reduced end portion of the tubing.
Claim 7
Dependent Claim
24 words
An apparatus as claimed in claim 1, further comprising a stationary bracket having an axial bore in which said guide member is axially slidable.
Claim 8
Dependent Claim
46 words
An apparatus as claimed in claim 1, in which said first and second driving means respectively comprise hydraulic cylinders having respective pistons which are operable to be moved for forcing said rod and tubing in opposite directions through said die during the squeezing and withdrawal operations.
Claim 9
Dependent Claim
24 words
An apparatus as claimed in claim 7, in which said pistons are aligned with said bore in said die and with said guide member.
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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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |