Patent US3746970A successfully refreshed from Google Patents.
Patent US3885809A successfully refreshed from Google Patents.
US3885809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle suspension
Assignee: Whitnash PLC
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Filing: 1973-02-20
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Granted: 1975-05-27
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Expires: 1993-02-20
Abstract
Abstract A vehicle suspension in which the load of the vehicle is transmitted to each road wheel through liquid in a liquid-filled telescopic strut and in which liquid is supplied to or released from the struts automatically to counteract any tendency of the vehicle to roll due to transverse load transference when cornering has one pair of valves which control the supply of liquid to and the release of liquid from all the struts, the said valves being mounted in such relation to one pair of struts associated with one pair of vehicle wheels that the load changes at that pair of wheels control the roll resistance at one or more other pairs of wheels of the vehicle.
Inventors
- 👤 Robert Hazell Pitcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:43
CPC Classifications
B; B60; B60G; B60G21/00; B60G21/02; B60G21/06; B60G17/00; B60G17/02; B60G17/033
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
244 words
A vehicle suspension system including a wheel mounted structure with a first and a second pair of wheels, first liquid filled struts with a chamber therein connecting one of said first pair of wheels with a source of liquid pressure and a drain source to oppose relative up and down movement of the wheel mounted structure and the wheel to which said strut is connected, valves connecting one of said first pair of wheels to said source of liquid pressure and drain source to produce roll resistance for said first pair of wheels, second liquid filled struts each having a first and second chamber connecting one wheel of said second pair of wheels to said wheel mounted structure, another valve in communication with the second chamber of said second struts selectively operatively connected to said second chamber and a source of pressure and drain source to connect either second chamber therewith, said first chambers being in open communication with the chamber of one of the struts of said first pair of wheels, whereby the pressure in said first chamber of each strut of the second pair of wheels varies with the pressure in the first chamber of one of the struts of the first pair of wheels, the arrangement being such that the changes of pressure in said second chambers produce roll resistance at the second pair of wheels in the same sense as the roll resistance produced at the first pair of wheels.
Claim 2
Dependent Claim
244 words
A vehicle suspension system including a wheel mounted structure with a first and a second pair of wheels, first liquid filled struts with a chamber therein connecting one of said first pair of wheels with a source of liquid pressure and a drain source to oppose relative up and down movement of the wheel mounted structure and the wheel to which said strut is connected, valves connecting one of said first pair of wheels to said source of liquid pressure and drain source to produce roll resistance for said first pair of wheels, second liquid filled struts each having a first and second chamber connecting one wheel of said second pair of wheels to said wheel mounted structure, another valve in communication with the second chamber of said second struts selectively operatively connected to said second chamber and a source of pressure and drain source to connect either second chamber therewith, said first chambers being in open communication with the chamber of one of the struts of said first pair of wheels, whereby the pressure in said first chamber of each strut of the second pair of wheels varies with the pressure in the first chamber of one of the struts of the first pair of wheels, the arrangement being such that the changes of pressure in said second chambers produce roll resistance at the second pair of wheels in the same sense as the roll resistance produced at the first pair of wheels.
Claim 3
Dependent Claim
61 words
A vehicle suspension system according to claim 1, wherein the second chambers in the second struts are respectively connected to the chambers of struts of the first pair of wheels on the same side of the vehicle, liquid pressure in said second chamber of each strut of the second pair of wheels acting to oppose the load of the wheel-mounted structure.
Claim 4
Dependent Claim
64 words
A vehicle suspension system according to claim 1, wherein the second chambers in the second struts of the second pair of wheels are respectively connected to the chambers of struts of the first pair of wheels on opposite sides of the vehicle, liquid pressure in said second chambers of each strut acting in the same direction as the load of the wheel mounted structure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |