Patent US3802718A successfully refreshed from Google Patents.
US3802718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring suspension for motor vehicle axles
Assignee: Individual
•
Filing: 1971-12-30
•
Granted: 1974-04-09
•
Expires: 1991-12-30
Abstract
Abstract In a resilient axle suspension there is provided, on each side of the vehicle, an axle bracket formed of a first or conventional leaf spring and a second or parabolic leaf spring substantially parallel with the conventional leaf spring. At one end the springs are rigidly clamped to one another and to an axle tube, whereas at the other end the conventional spring - having a uniform thickness along its length - is attached to the chassis to swing about a pivot without clearance and the parabolic spring - having a thickness increasing along its length towards the axle tube - is attached to the chassis to swing about the same pivot with the possibility of a linear forward and rearward shift with respect to the conventional spring.
Inventors
- 👤 F Schaeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:11
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/32; B60G11/34; B60G11/46; B60G11/465; B60G2200/00; B60G2200/30; B60G2200/31; B60G2204/00; B60G2204/40; B60G2204/43; B60G2204/4306; B60G2206/00; B60G2206/01; B60G2206/60; B60G2206/601
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
202 words
In a spring suspension for an axle of a motor vehicle having a chassis and an axle body spaced therefrom, the improvement comprising A. a hinge means secured to said chassis on either side of the longitudinal central axis of the vehicle, B. an axle bracket situated on either side of the longitudinal central axis of the vehicle and extending in the length dimension thereof, each axle bracket having 1. a first or conventional leaf spring of constant moment of resistance along its effective length, said conventional leaf spring being attached to said hinge means for pivotal motion about an axis normal to the central vehicular plane, 2. a second or parabolic leaf spring of decreasing moment of resistance along its length towards said hinge means, said parabolic leaf spring being attached to said hinge means with at least a horizontal clearance for permitting, in the length dimension of the vehicle, a shift of said parabolic spring in said hinge means in response to torsional forces acting about the length dimension of said axle bracket, said parabolic spring transmitting in said hinge means vertically directed forces, and C. means for securing said conventional spring and said parabolic spring to said axle body.
Claim 2
Dependent Claim
202 words
In a spring suspension for an axle of a motor vehicle having a chassis and an axle body spaced therefrom, the improvement comprising A. a hinge means secured to said chassis on either side of the longitudinal central axis of the vehicle, B. an axle bracket situated on either side of the longitudinal central axis of the vehicle and extending in the length dimension thereof, each axle bracket having 1. a first or conventional leaf spring of constant moment of resistance along its effective length, said conventional leaf spring being attached to said hinge means for pivotal motion about an axis normal to the central vehicular plane, 2. a second or parabolic leaf spring of decreasing moment of resistance along its length towards said hinge means, said parabolic leaf spring being attached to said hinge means with at least a horizontal clearance for permitting, in the length dimension of the vehicle, a shift of said parabolic spring in said hinge means in response to torsional forces acting about the length dimension of said axle bracket, said parabolic spring transmitting in said hinge means vertically directed forces, and C. means for securing said conventional spring and said parabolic spring to said axle body.
Claim 3
Dependent Claim
31 words
An improvement as defined in claim 1, wherein on either side of the longitudinal axis of the vehicle there is disposed solely one conventional leaf spring of constant moment of resistance.
Claim 4
Dependent Claim
94 words
a second or parabolic leaf spring of decreasing moment of resistance along its length towards said hinge means, said parabolic leaf spring being attached to said hinge means with at least a horizontal clearance for permitting, in the length dimension of the vehicle, a shift of said parabolic spring in said hinge means in response to torsional forces acting about the length dimension of said axle bracket, said parabolic spring transmitting in said hinge means vertically directed forces, and C. means for securing said conventional spring and said parabolic spring to said axle body.
Claim 5
Dependent Claim
94 words
a second or parabolic leaf spring of decreasing moment of resistance along its length towards said hinge means, said parabolic leaf spring being attached to said hinge means with at least a horizontal clearance for permitting, in the length dimension of the vehicle, a shift of said parabolic spring in said hinge means in response to torsional forces acting about the length dimension of said axle bracket, said parabolic spring transmitting in said hinge means vertically directed forces, and C. means for securing said conventional spring and said parabolic spring to said axle body.
Claim 6
Dependent Claim
26 words
An improvement as defined in claim 1, wherein on either side of the longitudinal axis of the vehicle there is disposed solely one parabolic leaf spring.
Claim 7
Dependent Claim
31 words
An improvement as defined in claim 1, wherein on either side of the longitudinal axis of the vehicle there is disposed solely one conventional leaf spring and one parabolic leaf spring.
Claim 8
Dependent Claim
19 words
An improvement as defined in claim 1, said conventional leaf spring having a constant cross-sectional configuration along its length.
Claim 9
Dependent Claim
61 words
An improvement as defined in claim 1, including A. a pivot pin forming part of said hinge means, B. a first spring eye constituting one terminus of said conventional spring, said first spring eye surrounding said pivot pin and C. a second spring eye constituting one terminus of said parabolic leaf spring, said second spring eye surrounding said first spring eye.
Claim 10
Dependent Claim
17 words
An improvement as defined in claim 1, said conventional leaf spring extending above said parabolic leaf spring.
Claim 11
Dependent Claim
18 words
An improvement as defined in claim 6, including a vertical clearance between said first and second spring eyes.
Claim 12
Dependent Claim
28 words
An improvement as defined in claim 6, including horizontal clearances between said first and second spring eyes in both the forward and the rearward directions of the vehicle.
Claim 13
Dependent Claim
29 words
An improvement as defined in claim 1, said means for securing said conventional spring and said parabolic spring to said axle body being formed of a rigid clamping mechanism.
Claim 14
Dependent Claim
25 words
An improvement as defined in claim 1, including air spring means in engagement with said chassis and at least indirectly supported by said axle bracket.
Claim 15
Dependent Claim
37 words
An improvement as defined in claim 11, including a carrier arm, one associated with each axle bracket, each carrier arm supporting said air spring means and being rigidly clamped together with said conventional and parabolic leaf springs.
Claim 16
Dependent Claim
15 words
An improvement as defined in claim 1, each axle bracket extending below said axle body.
Claim 17
Dependent Claim
15 words
An improvement as defined in claim 1, each axle bracket extending above said axle body.
Claim 18
Dependent Claim
40 words
An improvement as defined in claim 12, said carrier arm having an extension oriented towards said hinge means and connected to said axle bracket between its clamped location and said hinge means to provide a support for said axle bracket.
Claim 19
Dependent Claim
30 words
An improvement as defined in claim 15, said extension supporting half of the length of said axle bracket between said axle body and said hinge means nearest to the axle.
Claim 20
Dependent Claim
59 words
An improvement as defined in claim 1, wherein said conventional spring extending rearwardly beyond the location of attachment to said axle body, said improvement further includes guide means to guide the terminal portion of said conventional leaf spring remote from said hinge means, said guide means permitting longitudinal motion of said conventional leaf spring and preventing lateral displacements thereof.
Claim 21
Dependent Claim
30 words
An improvement as defined in claim 17, said guide means being formed of a longitudinally movable suspension carrying the terminus of said conventional leaf spring remote frOm said hinge means.
References Cited (Backward Citations)
US3434707A
Cited
US3493222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |