US3727940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension struts for independent wheel suspension systems of motor vehicles
Assignee: Motors Liquidation Co
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Filing: 1971-06-29
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Granted: 1973-04-17
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Expires: 1991-06-29
Abstract
Abstract A suspension strut for an independent wheel suspension of a motor vehicle comprises a telescopic damper with a helical compression spring arranged around the damper and seated at its ends on the cylinder tube and piston rod respectively of the damper. A wheel carrier is connected to the lower end of the damper cylinder tube and projects laterally therefrom. To compensate for the bending moment produced by the offset disposition of the wheel carrier relative to the damper axis, those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier - corresponding, in use, to the outboard side of the spring convolutions - are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the spring carrier. The spring starting material may for instance be circularsection spring stock, which, prior to convolution, has its crosssection locally reduced in area or changed in shape, by metal removal or by press-forming, to produce the portions having a smaller polar resistance moment.
Inventors
- 👤 K Hug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:51
CPC Classifications
B; B60; B60G; B60G15/00; B60G15/02; B60G15/06; B60G15/07; F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/042; F16F1/043
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
163 words
A suspension strut for an independent wheel suspension system of a motor vehicle, comprising a cylinder tube, a piston reciprocably mounted within the cylinder tube, and a piston rod secured to the piston and projecting from the cylinder tube, the cylinder tube, piston and piston rod together forming a telescopic damper, a wheel carrier connected to the cylinder tube and projecting laterally therefrom, means for connecting the piston rod to a vehicle body member, a helical compression spring arranged around the telescopic damper, and spring seat means at the ends of the spring and connected to the cylinder tube and piston rod respectively, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier.
Claim 2
Dependent Claim
163 words
A suspension strut for an independent wheel suspension system of a motor vehicle, comprising a cylinder tube, a piston reciprocably mounted within the cylinder tube, and a piston rod secured to the piston and projecting from the cylinder tube, the cylinder tube, piston and piston rod together forming a telescopic damper, a wheel carrier connected to the cylinder tube and projecting laterally therefrom, means for connecting the piston rod to a vehicle body member, a helical compression spring arranged around the telescopic damper, and spring seat means at the ends of the spring and connected to the cylinder tube and piston rod respectively, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier.
Claim 3
Dependent Claim
195 words
A suspension strut for an independent wheel suspension system of a motor vehicle, comprising a cylinder tube, a piston reciprocably mounted within the cylinder tube, and a piston rod secured to the piston and projecting from the cylinder tube, the cylinder tube, piston and piston rod together forming a telescopic damper, a wheel carrier connected to the cylinder tube and projecting laterally therefrom, means for connecting the piston rod to a vehicle body member, a helical compression spring arranged around the telescopic damper, and spring seat means at the ends of the spring and connected to the cylinder tube and piston rod respectively, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier, and in which there is a smooth transition in corss-section between the portions of the spring convolutions with the greater polar resistance moment and the portions with a smaller polar resistance moment.
Claim 4
Dependent Claim
195 words
A suspension strut for an independent wheel suspension system of a motor vehicle, comprising a cylinder tube, a piston reciprocably mounted within the cylinder tube, and a piston rod secured to the piston and projecting from the cylinder tube, the cylinder tube, piston and piston rod together forming a telescopic damper, a wheel carrier connected to the cylinder tube and projecting laterally therefrom, means for connecting the piston rod to a vehicle body member, a helical compression spring arranged around the telescopic damper, and spring seat means at the ends of the spring and connected to the cylinder tube and piston rod respectively, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier, and in which there is a smooth transition in corss-section between the portions of the spring convolutions with the greater polar resistance moment and the portions with a smaller polar resistance moment.
Claim 5
Dependent Claim
192 words
A suspension strut for an independent wheel suspension system of a motor vehicle, comprising a cylinder tube, a piston reciprocably mounted within the cylinder tube, and a piston rod secured to the piston and projecting from the cylinder tube, the cylinder tube, piston and piston rod together forming a telescopic damper, a wheel carrier connected to the cylinder tube and projecting laterally therefrom, means for connecting the piston rod to a vehicle body member, and a helical compression spring arranged around the telescopic damper, and spring seat means at the ends of the spring and connected to the cylinder tube and piston rod respectively, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier have a circular cross-section of larger cross-sectional area, and hence of greater polar resistance moment, than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier, said last-mentioned portions also having a circular cross-section, with a smooth transition in cross-section between the respective portions of the spring convolutions.
Claim 6
Dependent Claim
192 words
A suspension strut for an independent wheel suspension system of a motor vehicle, comprising a cylinder tube, a piston reciprocably mounted within the cylinder tube, and a piston rod secured to the piston and projecting from the cylinder tube, the cylinder tube, piston and piston rod together forming a telescopic damper, a wheel carrier connected to the cylinder tube and projecting laterally therefrom, means for connecting the piston rod to a vehicle body member, and a helical compression spring arranged around the telescopic damper, and spring seat means at the ends of the spring and connected to the cylinder tube and piston rod respectively, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier have a circular cross-section of larger cross-sectional area, and hence of greater polar resistance moment, than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier, said last-mentioned portions also having a circular cross-section, with a smooth transition in cross-section between the respective portions of the spring convolutions.
Claim 7
Dependent Claim
95 words
In a suspension strut for an independent wheel suspension system of a motor vehicle, comprising a telescopic damper and an assOciated helical compression spring arranged around the damper, with a wheel carrier projecting laterally from the damper, the improvement which comprises forming those portions of the convolutions of the helical spring which are disposed on the opposite side of the spring from the laterally projecting wheel carrier to have a lesser polar resistance moment than the portions of the spring convolutions which are disposed on the same side of the spring as the wheel carrier.
Claim 8
Dependent Claim
95 words
In a suspension strut for an independent wheel suspension system of a motor vehicle, comprising a telescopic damper and an assOciated helical compression spring arranged around the damper, with a wheel carrier projecting laterally from the damper, the improvement which comprises forming those portions of the convolutions of the helical spring which are disposed on the opposite side of the spring from the laterally projecting wheel carrier to have a lesser polar resistance moment than the portions of the spring convolutions which are disposed on the same side of the spring as the wheel carrier.
Claim 9
Dependent Claim
43 words
An arrangement according to claim 4, in which the portions of the spring convolutions which are disposed on the same side of the damper as the wheel carrier have a circular cross-section, and the portions on the opposite side have a flattened cross-section.
Claim 10
Dependent Claim
109 words
In a suspension strut for an independent wheel suspension system of a motor vehicle, comprising a telescopic damper and an associated helical compression spring arranged around the damper, with a wheel carrier projecting laterally from the damper, the improvement which comprises producing the helical compression spring by convoluting a spring-stock starting material which initially is of constant cross-section but subsequently is subjected to localised modification of the cross-section at predetermined intervals along the length of the spring-stock starting material corresponding generally to the circumference of the helical compression spring so that the polar resistance moment of each convolution of the helical compression spring is reduced at the localised modification.
Claim 11
Dependent Claim
109 words
In a suspension strut for an independent wheel suspension system of a motor vehicle, comprising a telescopic damper and an associated helical compression spring arranged around the damper, with a wheel carrier projecting laterally from the damper, the improvement which comprises producing the helical compression spring by convoluting a spring-stock starting material which initially is of constant cross-section but subsequently is subjected to localised modification of the cross-section at predetermined intervals along the length of the spring-stock starting material corresponding generally to the circumference of the helical compression spring so that the polar resistance moment of each convolution of the helical compression spring is reduced at the localised modification.
Claim 12
Dependent Claim
156 words
An independent wheel suspension system of a motor vehicle, comprising for each of a pair of dirigible front wheels of a vehicle, a telescopic damper, an associated helical compression spring arranged around the telescopic damper and reciprocable thereby, a wheel carrier connected to the telescopic damper and projecting laterally therefrom, pivotal link means articulated to one end of the telescopic damper and adapted for pivotal connection to a vehicle body member, and resilient means connected to the other end of the telescopic damper and adapted to form an angularly movable connection to a vehicle body member, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier.
Claim 13
Dependent Claim
156 words
An independent wheel suspension system of a motor vehicle, comprising for each of a pair of dirigible front wheels of a vehicle, a telescopic damper, an associated helical compression spring arranged around the telescopic damper and reciprocable thereby, a wheel carrier connected to the telescopic damper and projecting laterally therefrom, pivotal link means articulated to one end of the telescopic damper and adapted for pivotal connection to a vehicle body member, and resilient means connected to the other end of the telescopic damper and adapted to form an angularly movable connection to a vehicle body member, in an arrangement in which those portions of the convolutions of the helical spring which are disposed on the same side of the spring as the laterally projecting wheel carrier are constructed to have a greater polar resistance moment than the portions of the spring convolutions which are disposed on the opposite side of the spring from the wheel carrier.
References Cited (Backward Citations)
US3202237A
Cited
US3405929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |