EP0192371A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Dynamic vibration attenuator utilizing inertial fluid
Assignee: Lord Corp
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Filing: 1986-02-03
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Granted: —
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Expires: 2006-02-03
Abstract
Abstract The attenuator (10) has a chamber (20) filled with hydraulic fluid and bordered by a diaphragm (22) effective to impart oscillatory movement to a slug (26) of such fluid. During high frequency excitation the inertial forces of the oscillating fluid slug (26) minimize the dynamic stiffness of the attenuating device. The particular excitation frequency at which the foregoing occurs is controlled by an annular tuning plate (28) or assembly disposed in non-engaging relationship to the diaphragm (22) and having an opening (30) which may be adjustable in size either automatically or manually.
Inventors
- 👤 Wallace Curtis Flower
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 04:32
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/06; F16F13/22; F16F13/08; F16F13/10; F16F13/105; F16F13/26; F16F13/262
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
A dynamic vibration attenuating device suitable for use as an engine mount or the like, comprising: a housing formed in part of spring-like elasto- merlc material, said housing having a variable volume working chamber containing hydraulic fluid, said chamber having a wall including resilient fluid oscillator means for during excitation of said mount imparting oscillatory movement to a slug of said hydraulic fluid, said oscillatory movement of said fluid slug generating inertial forces effecting a reduction of the dynamic stiffness of said mount at high frequency excitation thereof, and tuning means disposed within said chamber in non-engaging spaced relationship to said oscillator means and cooperable therewith for causing said stiffness reduction of said mount to occur at a selected excitation frequency of said mount.
Claim 2
Dependent Claim
124 words
A dynamic vibration attenuating device suitable for use as an engine mount or the like, comprising: a housing formed in part of spring-like elasto- merlc material, said housing having a variable volume working chamber containing hydraulic fluid, said chamber having a wall including resilient fluid oscillator means for during excitation of said mount imparting oscillatory movement to a slug of said hydraulic fluid, said oscillatory movement of said fluid slug generating inertial forces effecting a reduction of the dynamic stiffness of said mount at high frequency excitation thereof, and tuning means disposed within said chamber in non-engaging spaced relationship to said oscillator means and cooperable therewith for causing said stiffness reduction of said mount to occur at a selected excitation frequency of said mount.
Claim 3
Dependent Claim
26 words
A device as in claim 1, wherein said fluid oscillator means comprises a thin diaphragm-like member having a constrained peripheral portion and a flexible central portion.
Claim 4
Dependent Claim
34 words
A device as in claim 2, wherein said tuning means includes a tuning assembly extending in generally parallel relationship to said diaphragm and having at least one opening through which said fluid slug projects.
Claim 5
Dependent Claim
21 words
A device as in claim 3, wherein said tuning assembly includes adjustable means for adjustably varying the size of said opening.
Claim 6
Dependent Claim
46 words
A device as in claim 3 or claim 4, wherein said tuning assembly includes first and second members defining said opening therebetween, and means mounting each of said members for adjustive movement relative to the other of said members for varying the size of said opening.
Claim 7
Dependent Claim
22 words
A device as in claim 5, and further including means for imparting said adjustive movement to said members of said tuning assembly.
Claim 8
Independent Claim
62 words
A device as in anyone of the preceding claims, wherein said device has a second variable volume chamber also containing hydraulic fluid, and said wall has a long slender passageway interconnecting said working chamber and said second chamber, said oscillator means being effective during operation of said device to impart oscillatory movement to a second fluid slug disposed within said second chamber.
Claim 9
Dependent Claim
84 words
A device as in claim 7, wherein said tuning means includes a pair of tuning assemblies each having an opening therein, one of said assemblies being mounted within said working chamber and the other of assemblies being mounted within said second chamber, said assemblies extending in spaced non-engaging and substantially parallel relationship to each other and to said fluid oscillator means, said opening of each of assemblies being adapted to receive the one of said fluid slugs within its respective one of said chambers.
Claim 10
Dependent Claim
40 words
A device as in claim 8, and further including control means for adjustably varying the size of said opening of each of said tuning assemblies in response to changes in the operating speed of an engine mounted by said device.
References Cited (Backward Citations)
No citation records indexed.
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