Patent US4779853A successfully refreshed from Google Patents.
US4779853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining and damping vibrations
Assignee: Nissan Motor Co Ltd
•
Filing: 1987-08-27
•
Granted: 1988-10-25
•
Expires: 2007-08-27
Abstract
Abstract The method comprises determining a first resonant frequency of a system comprising a vibratory body, a supporting body and a vibration damping device disposed therebetween. Vibrations at the first resonant frequency are dampened by defining first and second chambers in the device which are separate from each other and communicate with each other through a passage configured to impart a second resonant frequency to fluid received within the passage which substantially equals the first resonant frequency.
Inventors
- 👤 Masaru Sugino
- 👤 Shin Takehara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:34
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/06; F16F13/08; F16F13/10; B; B60; B60K; B60K5/00; B60K5/12; B60K5/1241; F16C; F16C7/00; F16C7/04; F16F13/14; F16F13/149
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A method, comprising: determining a first resonant frequency of a system comprising a vibratory body, a supporting body and a vibration damping device disposed therebetween having first and second fluid filled chambers not in communication with each other; and damping vibrations at said first resonant frequency in a system comprising a vibratory body, a supporting body and a vibration damping device disposed therebetween having first and second chambers which communicate with each other through a passage configured to impart a second resonant frequency to fluid received within said passage which substantially equals said first resonant frequency.
Claim 2
Independent Claim
96 words
A method, comprising: determining a first resonant frequency of a system comprising a vibratory body, a supporting body and a vibration damping device disposed therebetween having first and second fluid filled chambers not in communication with each other; and damping vibrations at said first resonant frequency in a system comprising a vibratory body, a supporting body and a vibration damping device disposed therebetween having first and second chambers which communicate with each other through a passage configured to impart a second resonant frequency to fluid received within said passage which substantially equals said first resonant frequency.
Claim 3
Dependent Claim
20 words
A method as claimed in claim 1 wherein said first resonant frequency is coincident with a frequency of engine shake.
Claim 4
Dependent Claim
23 words
A method as claimed in claim 1 wherein said vibratory body is a power unit and said supporting body is a vehicle body.
Claim 5
Dependent Claim
27 words
A method as claimed in claim 1 wherein said passage comprises an orifice having a cross section of about 0.15 cm 2 to 0.5 cm 2 .
Claim 6
Dependent Claim
25 words
A method as claimed in claim 1 wherein said vibration damping device includes a rubber block interposed between said vibratory body and said supporting body.
References Cited (Backward Citations)
DE1172550B
Cited
US4420060A
Cited
US4418897A
Cited
US4437653A
Cited
JPS5861345A
Cited
JPS58124841A
Cited
JPS58170934A
Cited
FR2536143A1
Cited
DE3316177A1
Cited
JPS60184739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |