US3693470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power steering mechanism
Assignee: Individual
•
Filing: 1970-12-09
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Granted: 1972-09-26
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Expires: 1990-12-09
Abstract
Abstract A torsion bar system is provided for a power steering mechanism which makes use of liquid pressure for steering operation. The torsion bar system comprises a torsion bar and two brims joined to both ends thereof, at least one brim being joined to one end of the torsion bar via a tube covering the torsion bar and the brims being closely opposed to each other. Such two brims have a plurality of recessed portions on their respective peripheries, which are different in phase and in which projections from input and output members are received and held so that the torsion bar system may be easily incorporated in the power steering mechanism with initial load being applied to the torsion bar and so that torsion may be given over the full length thereof in handling operation.
Inventors
- 👤 Toshio Masuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:21
CPC Classifications
B; B62; B62D; B62D5/00; B62D5/06; B62D5/20; B62D5/24; B60; B60G; B60G2206/00; B60G2206/01; B60G2206/40; B60G2206/42; B60G2206/427
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
239 words
In a power steering mechanism, in combination, a torsion bar having spaced end portions; a pair of axially adjacent flanges extending radially of said torsion bar and each operatively connected with one of said end portions, said flanges each having a circumference; a plurality of circumferentially spaced first recesses provided in said circumference of one of said flanges, and a plurality of circumferentially spaced second recesses provided in said circumference of the other of said flanges and each initially angularly offset with reference to said first recesses; and an input and an output member having respective pluralities of circumferentially spaced projections each of which is of lesser circumferential dimension than said recesses, the projections of one of said members being received in said first recesses and the projections of the other member being received in said second recesses after application of torsion to said torsion bar of sufficient magnitude to effect axial alignment of the respective first and second recesses, whereby said projections of said one member abut against one and are spaced from the opposite circum-ferential side bounding said first recesses, and said projections of said other member abut against the opposite and are spaced from the one circumferential side bounding said second recesses, so that said torsion bar may be twisted over its full length for increasing the reaction force produced by twisting when said input member is turned in one or the other opposite circumferential direction.
Claim 2
Dependent Claim
239 words
In a power steering mechanism, in combination, a torsion bar having spaced end portions; a pair of axially adjacent flanges extending radially of said torsion bar and each operatively connected with one of said end portions, said flanges each having a circumference; a plurality of circumferentially spaced first recesses provided in said circumference of one of said flanges, and a plurality of circumferentially spaced second recesses provided in said circumference of the other of said flanges and each initially angularly offset with reference to said first recesses; and an input and an output member having respective pluralities of circumferentially spaced projections each of which is of lesser circumferential dimension than said recesses, the projections of one of said members being received in said first recesses and the projections of the other member being received in said second recesses after application of torsion to said torsion bar of sufficient magnitude to effect axial alignment of the respective first and second recesses, whereby said projections of said one member abut against one and are spaced from the opposite circum-ferential side bounding said first recesses, and said projections of said other member abut against the opposite and are spaced from the one circumferential side bounding said second recesses, so that said torsion bar may be twisted over its full length for increasing the reaction force produced by twisting when said input member is turned in one or the other opposite circumferential direction.
Claim 3
Dependent Claim
59 words
In a power steering mechanism as defined in claim 1, one of said flanges being provided on one end portion of said torsion bar; and further comprising a tubular element surrounding said torsion bar and having one end fixedly connected with the other end portion of said torsion bar, and another end provided with the other of said flanges.
Claim 4
Dependent Claim
61 words
In a power steering mechanism as defined in claim 1, said flanges extending radially of said torsion bar intermediate said end portions thereof; and further comprising a pair of tubular elements surrounding said torsion bar and each having one end provided with one of said flanges and another end fixedly connected with one of said end portions of said torsion bar.
References Cited (Backward Citations)
US2534621A
Cited
GB878212A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |