US3692370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damping means for increasing the minimum dynamic stiffness of a shaft
Assignee: Individual
•
Filing: 1971-09-23
•
Granted: 1972-09-19
•
Expires: 1991-09-23
Abstract
Abstract The minimum dynamic stiffness of a spindle of a grinding wheel is increased by having a sleeve of viscoelastic material bonded to the spindle between the bearing supports for the spindle. A sleeve surrounds the viscoelastic material sleeve to constrain the sleeve of viscoelastic material to increase its shear strains and is bonded thereto.
Inventors
- 👤 John R Hasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:05
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/10; F16F15/14; F16F15/1407; F16F15/1414; F16F15/1435; F16F15/1442; B; B24; B24B; B24B41/00; B24B41/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
In combination: a rotating shaft; bearing means to support longitudinally spaced portions of said rotating shaft; damping means disposed between said bearing means to increase the minimum dynamic stiffness of said rotating shaft; and said damping means including: a layer of viscoelastic material of substantially uniform thickness extending longitudinally along said rotating shaft in at least partial surrounding relation to said rotating shaft to be movable in response to vibrations of said rotating shaft to absorb the vibrations; first means to prevent relative sliding movement between said rotating shaft and said layer of viscoelastic material; a member disposed in at least partial surrounding relation to said layer of viscoelastic material; second means to prevent relative sliding movement between said layer of viscoelastic material and said member; and said member constraining said layer of viscoelastic material to increase the strains in said layer of viscoelastic material.
Claim 2
Dependent Claim
145 words
In combination: a rotating shaft; bearing means to support longitudinally spaced portions of said rotating shaft; damping means disposed between said bearing means to increase the minimum dynamic stiffness of said rotating shaft; and said damping means including: a layer of viscoelastic material of substantially uniform thickness extending longitudinally along said rotating shaft in at least partial surrounding relation to said rotating shaft to be movable in response to vibrations of said rotating shaft to absorb the vibrations; first means to prevent relative sliding movement between said rotating shaft and said layer of viscoelastic material; a member disposed in at least partial surrounding relation to said layer of viscoelastic material; second means to prevent relative sliding movement between said layer of viscoelastic material and said member; and said member constraining said layer of viscoelastic material to increase the strains in said layer of viscoelastic material.
Claim 3
Dependent Claim
40 words
The combination according to claim 1 in which: said first preventing means includes bonding of said layer of viscoelastic material to said rotating shaft; and said second preventing means includes bonding of said member to said layer of viscoelastic material.
Claim 4
Dependent Claim
60 words
The combination according to claim 2 in which: said layer of viscoelastic material comprises a sleeve disposed in surrounding relation to said rotating shaft; and said member comprises a second sleeve disposed in surrounding relation to said sleeve of viscoelastic material, said second sleeve constraining said sleeve of viscoelastic material to increase the strains in said sleeve of viscoelastic material.
Claim 5
Dependent Claim
21 words
The combination according to claim 3 in which said second sleeve extends for the length of said sleeve of viscoelastic material.
Claim 6
Dependent Claim
17 words
The combination according to claim 2 in which said layer of viscoelastic material surrounds said rotating shaft.
Claim 7
Dependent Claim
20 words
The combination according to claim 5 in which said member extends for the length of said layer of viscoelastic material.
Claim 8
Dependent Claim
20 words
The combination according to claim 2 in which said member extends for the length of said layer of viscoelastic material.
Claim 9
Dependent Claim
60 words
The combination according to claim 1 in which: said layer of viscoeLastic material comprises a sleeve disposed in surrounding relation to said rotating shaft; and said member comprises a second sleeve disposed in surrounding relation to said sleeve of viscoelastic material, said second sleeve constraining said sleeve of viscoelastic material to increase the strains in said sleeve of viscoelastic material.
Claim 10
Dependent Claim
21 words
The combination according to claim 8 in which said second sleeve extends for the length of said sleeve of viscoelastic material.
Claim 11
Dependent Claim
17 words
The combination according to claim 1 in which said layer of viscoelastic material surrounds said rotating shaft.
Claim 12
Dependent Claim
20 words
The combination according to claim 10 in which said member extends for the length of said layer of viscoelastic material.
Claim 13
Dependent Claim
20 words
The combination according to claim 1 in which said member extends for the length of said layer of viscoelastic material.
References Cited (Backward Citations)
US1478797A
Cited
US1697046A
Cited
US2001167A
Cited
US2582873A
Cited
US2747440A
Cited
US3292237A
Cited
US3385009A
Cited
US3463048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |