US3902352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for checking the efficiency of shock absorbers on vehicles
Assignee: Individual
•
Filing: 1974-04-01
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Granted: 1975-09-02
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Expires: 1994-04-01
Abstract
Abstract A suspension check-up device for a motor car is disclosed, which is capable of checking up the efficiency of the shock absorbers of a vehicle without removing it from the vehicle. The device comprises means for causing a wheel of the vehicle and its suspension to be periodically oscillated, a phase indicator to count the oscillations, and a force detector for measuring the force impressed to the wheel. A comparator compares the phase signal with the force signal and gives the time shift between the two signals. The waveform of the force plot (if drawn by a plotting device) can also give to a skilled operator an indication as to the nature of the possible defect of a shock absorber.
Inventors
- 👤 Luigi Buzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
G; G01; G01M; G01M17/00; G01M17/007; G01M17/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A device for measuring the dampening efficiency of a shock absorber mounted between two members of a vehicle suspension which are relatively movable with respect to one another, such deviCe comprising a support means including a wheel supporting portion for at least one wheel of the vehicle, actuating means engaged with an actuated portion of said support means to impart thereto a periodical vertical oscillatory motion to cause corresponding movement of the wheel, first sensing means adapted to measure the displacements of said actuated portion of the support means and to produce corresponding periodical displacement signals, second sensing means located on said support means between said actuated and wheel supporting portions thereof to measure the force transferred by said support means to the wheel resting thereon and to produce corresponding periodical force signals and processing means for processing said displacement and force signals and indicating the phase relationship therebetween.
Claim 2
Independent Claim
149 words
A device for measuring the dampening efficiency of a shock absorber mounted between two members of a vehicle suspension which are relatively movable with respect to one another, such deviCe comprising a support means including a wheel supporting portion for at least one wheel of the vehicle, actuating means engaged with an actuated portion of said support means to impart thereto a periodical vertical oscillatory motion to cause corresponding movement of the wheel, first sensing means adapted to measure the displacements of said actuated portion of the support means and to produce corresponding periodical displacement signals, second sensing means located on said support means between said actuated and wheel supporting portions thereof to measure the force transferred by said support means to the wheel resting thereon and to produce corresponding periodical force signals and processing means for processing said displacement and force signals and indicating the phase relationship therebetween.
Claim 3
Dependent Claim
54 words
A device according to claim 1, wherein said support means is formed by an oscillating platform having a horizontal pivot axis and said actuating means are formed by a rotating cam on which said platform is resting, said wheel supporting portion of the support means being formed by a yielding portion of said platform.
Claim 4
Dependent Claim
18 words
A device according to claim 2, wherein said first sensing means are operatively connected to said rotating cam.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |