Patent US3830138A successfully refreshed from Google Patents.
US3830138A
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Control arrangement for a suspension system using a pressure medium
Assignee: Fried Krupp AG Hoesch Krupp
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Filing: 1972-05-17
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Granted: 1974-08-20
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Expires: 1992-05-17
Abstract
Abstract A constant distance is maintained between the body of a vehicle and a wheel axle by changing the quantity of pressure medium in the suspension system. First switches close automatically when the body of the vehicle is too close to the wheel axle. The signal furnished by the closing of the switches is time delayed and then acts to activate a pump increasing the quantity of pressure medium in the suspension. The raising of the vehicle by this increase in pressure medium is continued until second switches are closed which indicate that the body of the vehicle is too high relative to the wheel axle. The closing of the second switches furnishes a signal which terminates the operation of the pump and initiates immediately the opening of a valve which decreases the quantity of pressure medium in the suspension. If the second switches are closed without prior closure of the first switches, the valve is opened only after the above-mentioned time delay. In both instances, the valve is again closed when the second switch reopens. In this manner the body of the vehicle is at the same distance from the wheel axle regardless of whether a lifting or a lowering of the vehicle body was initially required.
Inventors
- 👤 K Joneleit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:12
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/0152; B60G17/018; B60G17/019; B60G17/01933; B60G21/00; B60G21/10; B60G21/106; B60G2204/00; B60G2204/10; B60G2204/11; B60G2204/111; B60G2204/112; B60G2400/00; B60G2400/25; B60G2400/252; B60G2401/00; B60G2401/17; B60G2401/20; B60G2500/00; B60G2500/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
In a system having a first member, a second member, and suspension means for suspending said first member relative to said second member at a distance varying at least in part as a function of pressure medium in said suspension means, in combination, first signal furnishing means for furnishing a first signal when the distance between said first member and said second member is less than a first predetermined distance; delay means connected to said first signal furnishing means, said delay means having input gating means including at least one bistable semiconductor logic circuit, timing circuit means connected to said input gating means for furnishing a predetermined time delay, and output gating means connected to said timing circuit means, said output gating means furnishing a first activating signal after said predetermined time delay following receipt of said first signal; and first activating means connected to said delay means for changing the quantity of said pressure medium in such a manner as to increase said distance between said first and second member, in response to said first activating signal.
Claim 2
Dependent Claim
178 words
In a system having a first member, a second member, and suspension means for suspending said first member relative to said second member at a distance varying at least in part as a function of pressure medium in said suspension means, in combination, first signal furnishing means for furnishing a first signal when the distance between said first member and said second member is less than a first predetermined distance; delay means connected to said first signal furnishing means, said delay means having input gating means including at least one bistable semiconductor logic circuit, timing circuit means connected to said input gating means for furnishing a predetermined time delay, and output gating means connected to said timing circuit means, said output gating means furnishing a first activating signal after said predetermined time delay following receipt of said first signal; and first activating means connected to said delay means for changing the quantity of said pressure medium in such a manner as to increase said distance between said first and second member, in response to said first activating signal.
Claim 3
Dependent Claim
233 words
In a system having a first member, a second member, and suspension means for suspending said first member relative to said second member at a distance varying at least in part as a function of pressure medium in said suspension means, in combination, first signal furnishing means for furnishing a first signal when the distance between said first member and said second member is less than a first predetermined distance; delay means connected to said first signal furnishing means, said delay means having input gating means, timing circuit means connected to said input gating means for furnishing a predetermined time delay, and output gating means connected to said timing circuit means, said output gating means furnishing a first activating signal after said predetermined time delay following receipt of said first signal; first activating means connected to said delay means for changing the quantity of said pressure medium in such a manner as to increase said distance between said first and second member, in response to said first activating signal; second signal furnishing means for furnishing a second signal when the distance between said first member and said second member is greater than a second predetermined distance; and third gating means interconnected between said second signal furnishing means and said output gating means for inhibiting the furnishing of said first activating signal in response to said second signal, thereby deactivating said first activating means.
Claim 4
Dependent Claim
233 words
In a system having a first member, a second member, and suspension means for suspending said first member relative to said second member at a distance varying at least in part as a function of pressure medium in said suspension means, in combination, first signal furnishing means for furnishing a first signal when the distance between said first member and said second member is less than a first predetermined distance; delay means connected to said first signal furnishing means, said delay means having input gating means, timing circuit means connected to said input gating means for furnishing a predetermined time delay, and output gating means connected to said timing circuit means, said output gating means furnishing a first activating signal after said predetermined time delay following receipt of said first signal; first activating means connected to said delay means for changing the quantity of said pressure medium in such a manner as to increase said distance between said first and second member, in response to said first activating signal; second signal furnishing means for furnishing a second signal when the distance between said first member and said second member is greater than a second predetermined distance; and third gating means interconnected between said second signal furnishing means and said output gating means for inhibiting the furnishing of said first activating signal in response to said second signal, thereby deactivating said first activating means.
Claim 5
Dependent Claim
118 words
A control system as set forth in claim 2, wherein said delay means further comprise first storage means connected to the output of said timing circuit means for storing said first signal following said predetermined time delay, thereby furnishing a stored first signal; and fourth gating means, having a first and second input respectively connected to said second signal furnishing means and said first storage means, for furnishing a second activating signal in response to said second signal and said stored first signal; and second activating means for changing the quantity of said pressure medium in such a manner as to decrease the distance between said first and said second member, in response to said second activating signal.
Claim 6
Dependent Claim
78 words
A control system as set forth in claim 3, further comprising means interconnecting said second signal furnishing means and said first storage means in such a manner that said first storage means also furnish said stored signal after said predetermined time delay following receipt of said second signal, whereby said fourth gating means furnish said second activating signal also in the absence of said first signal and following siad predetermined time delay after receipt of said second signal.
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |