US4090700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring assister
Assignee: Individual
•
Filing: 1977-07-26
•
Granted: 1978-05-23
•
Expires: 1997-07-26
Abstract
Abstract A device supported by a vehicle frame for engagement with a leaf spring, attached to the rear axle of the vehicle, to increase the resistance afforded by the spring in supporting the rear part of the vehicle frame and the load carried thereby.
Inventors
- 👤 Robert E. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:02
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; F16F1/22; B; B60; B60G; B60G17/00; B60G17/02; B60G17/023
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
207 words
In combination with a rear leaf spring of a motor vehicle having an intermediate portion secured to a rear axle and end portions connected to parts of the vehicle frame by spring shackles; spring assisters connected to and depending from the vehicle frame and bearing on the leaf spring between and adjacent the shackles, each spring assister comprising a bracket secured to a part of the vehicle frame and having an upright leg disposed on the outer side of the frame, a support member, means securing said support member to an outer side of said upright bracket leg, said support member being disposed upright in an operative position thereof and having a bottom portion bearing on the leaf spring for assisting the spring in supporting the rear end of the vehicle and the load carried thereby, said bottom portion being recessed to define a downwardly opening fork, a roller carried by the fork, said roller constituting the part of the bottom portion bearing on the spring, and said means clamping the support member in different vertically adjusted positions on the bracket and functioning to secure the support member in an inoperative position crosswise of the upright leg of the bracket and out of engagement with the spring.
Claim 2
Dependent Claim
207 words
In combination with a rear leaf spring of a motor vehicle having an intermediate portion secured to a rear axle and end portions connected to parts of the vehicle frame by spring shackles; spring assisters connected to and depending from the vehicle frame and bearing on the leaf spring between and adjacent the shackles, each spring assister comprising a bracket secured to a part of the vehicle frame and having an upright leg disposed on the outer side of the frame, a support member, means securing said support member to an outer side of said upright bracket leg, said support member being disposed upright in an operative position thereof and having a bottom portion bearing on the leaf spring for assisting the spring in supporting the rear end of the vehicle and the load carried thereby, said bottom portion being recessed to define a downwardly opening fork, a roller carried by the fork, said roller constituting the part of the bottom portion bearing on the spring, and said means clamping the support member in different vertically adjusted positions on the bracket and functioning to secure the support member in an inoperative position crosswise of the upright leg of the bracket and out of engagement with the spring.
Claim 3
Dependent Claim
19 words
In a combination as defined by claim 1, said upright bracket leg and support member having inter-engaging serrated faces.
References Cited (Backward Citations)
US1546144A
Cited
US1959118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |