US4873888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity damper
Assignee: Mitsubishi Electric Corp
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Filing: 1988-03-30
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Granted: 1989-10-17
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Expires: 2008-03-30
Abstract
Abstract Disclosed is a viscosity damper which includes a damper casing attached to a motor shaft to be driven therewith, a viscous fluid filled in the damper casing and a plurality of inertia bodies each having different diameters which are arranged in a co-axial relation with a space formed therebetween in the radial direction in the damper casing.
Inventors
- 👤 Jiro Matsuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:14
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/16; F16F15/167; F16F15/173; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121; Y10T74/2122
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A viscosity damper which comprises: a damper casing attached to a motor shaft to be driven therewith; a viscous fluid filled in said damper casing and at least two inertia bodies each being surrounded by said viscous fluid so as not to be restricted from moving by said casing and so as to be movable independent of said casing and having different diameters and which are arranged in a co-axial relation with a space formed between said inertia bodies in the radial direction in said damper casing.
Claim 2
Dependent Claim
87 words
A viscosity damper which comprises: a damper casing attached to a motor shaft to be driven therewith; a viscous fluid filled in said damper casing and at least two inertia bodies each being surrounded by said viscous fluid so as not to be restricted from moving by said casing and so as to be movable independent of said casing and having different diameters and which are arranged in a co-axial relation with a space formed between said inertia bodies in the radial direction in said damper casing.
Claim 3
Dependent Claim
15 words
The viscosity damper according to claim 1, wherein said inertia bodies have a ring shape.
Claim 4
Dependent Claim
106 words
A viscosity damper which comprises: a damper casing attached to a motor shaft to be driven therewith; a viscous fluid filled in said damper casing; and at least two inertia body arrangements each being surrounded by said viscous fluid so as not to be restricted from moving by said casing and so as to be movable independent of said casing and having different arc radius which are arranged in a co-axial relation with a space formed between said inertia body arrangments in the radial direction in said damper casing wherein each said inertia body arrangement is split in the circumferential direction into a plurality of pieces.
Claim 5
Dependent Claim
106 words
A viscosity damper which comprises: a damper casing attached to a motor shaft to be driven therewith; a viscous fluid filled in said damper casing; and at least two inertia body arrangements each being surrounded by said viscous fluid so as not to be restricted from moving by said casing and so as to be movable independent of said casing and having different arc radius which are arranged in a co-axial relation with a space formed between said inertia body arrangments in the radial direction in said damper casing wherein each said inertia body arrangement is split in the circumferential direction into a plurality of pieces.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |