US3926070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rack-and-pinion steering gear box incorporating a damper for motor vehicles
Assignee: Fiat Auto SpA
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Filing: 1973-09-07
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Granted: 1975-12-16
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Expires: 1993-09-07
Abstract
Abstract A steering gear box for motor vehicles is disclosed, of the rack-and-pinion type, in which the rack rod is utilized for providing a cylinder for a damper, a tubular form being imparted to the rack at least in the portion which is intended for use as a damper cylinder. A considerable space saving is thus achieved.
Inventors
- 👤 Giuseppe Busso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:14
CPC Classifications
B; B62; B62D; B62D7/00; B62D7/22; B62D3/00; B62D3/02; B62D3/12; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1967
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A rack-and-pinion steering-gear box for motor vehicles wherein a straight toothed rod is controlled to slide within a fixed tubular body by the rotation of a pinion, comprising aa two-membered hydraulic damper located inside an axially directed cavity of a hollow portion of said rod, said damper having a piston and a cylinder, which are respectively movable with a rectilinear motion along the axis of movement of said rod, the members of said damper being contained in the interior of said fixed body, one member being fastened to said body and the other to said rod.
Claim 2
Dependent Claim
96 words
A rack-and-pinion steering-gear box for motor vehicles wherein a straight toothed rod is controlled to slide within a fixed tubular body by the rotation of a pinion, comprising aa two-membered hydraulic damper located inside an axially directed cavity of a hollow portion of said rod, said damper having a piston and a cylinder, which are respectively movable with a rectilinear motion along the axis of movement of said rod, the members of said damper being contained in the interior of said fixed body, one member being fastened to said body and the other to said rod.
Claim 3
Dependent Claim
69 words
THe steering-gear box as defined in claim 1, wherein said piston is supported substantially at the end of a stem affixed to one of its faces, and the space comprised within said cylinder, in correspondence with one face of said piston, is connected to a compensation chamber through a valve which permits to discharge from said cylinder the liquid contained therein as the liquid pressure exceeds a preselected value.
Claim 4
Dependent Claim
33 words
The steering-gear box as defined in claim 1, wherein said one damper member is constituted by said piston while said other member is integral with said rod and is constituted by said cylinder.
Claim 5
Dependent Claim
20 words
The steering-gear box as defined in claim 3, wherein said cylinder is defined by said hollow portion of the rod.
Claim 6
Dependent Claim
109 words
A rack-and-pinion steering-gear box for motor vehicles wherein a straight toothed rod is controlled to slide within a fixed tubular body by the rotation of a pinion, comprising a two-membered hydraulic damper having a piston and a cylinder, which are respectively movable with a rectilinear motion along the axis of movement of said rod, the members of said damper being contained in the interior of said fixed body, one member being fastened to said body and the other to said rod, wherein the latter is at least partially hollow so as to provide therein said cylinder, and said piston is guided by a stem fastened to said fixed body.
Claim 7
Dependent Claim
109 words
A rack-and-pinion steering-gear box for motor vehicles wherein a straight toothed rod is controlled to slide within a fixed tubular body by the rotation of a pinion, comprising a two-membered hydraulic damper having a piston and a cylinder, which are respectively movable with a rectilinear motion along the axis of movement of said rod, the members of said damper being contained in the interior of said fixed body, one member being fastened to said body and the other to said rod, wherein the latter is at least partially hollow so as to provide therein said cylinder, and said piston is guided by a stem fastened to said fixed body.
Claim 8
Dependent Claim
83 words
The steering-gear box as defined in claim 5, wherein said rod has a first hollow portion forming said cylinder and a second hollow portion which freely houses said stem, the latter being fastened at one end to said piston and at the other end to a pin integral with a wall of said fixed body, and passed through a slot formed through a wall of said rod with an axis directed concordantly with its generating lines in correspondence with said second hollow portion.
References Cited (Backward Citations)
US3593592A
Cited
US3627346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |