Patent US3643546A successfully refreshed from Google Patents.
US3643546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuned damping means for increasing the minimum dynamic stiffness of a spindle system
Assignee: Milacron Inc
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Filing: 1969-12-18
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Granted: 1972-02-22
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Expires: 1989-12-18
Abstract
Abstract The minimum dynamic stiffness of a milling cutter and its holder, which form a spindle system, is increased by disposing a tuned damped vibration absorber, which comprises a damping mass supported by a viscoelastic material element, within the milling cutter. The element of viscoelastic material is retained within the damping mass by retaining means.
Inventors
- 👤 Robert C Richter
- 👤 Shimoga K Srinath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:14
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0952; B23Q17/0971; B23Q17/0976; B23C; B23C5/00; B23C5/003; Y; Y10; Y10T; Y10T279/00; Y10T279/24; Y10T279/35; Y10T408/00; Y10T408/76; Y10T409/00; Y10T409/30; Y10T409/304312
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
118 words
A tuned damped vibration absorber for a machine tool having cutting means including a rotating cutting element, said absorber including: an element of viscoelastic material supported within the rotating cutting element; a damping mass supported solely by said element of viscoelastic material; said damping mass and said element of viscoelastic material cooperating to absorb vibrations from the cutting means; means to retain said damping mass and said element of viscoelastic material on the cutting means; said element of viscoelastic material having a conical shape; said damping mass having a conical surface to receive said conical-shaped element of viscoelastic material; and means to hold said element of viscoelastic material in engagement with the conical surface of said damping mass.
Claim 2
Dependent Claim
118 words
A tuned damped vibration absorber for a machine tool having cutting means including a rotating cutting element, said absorber including: an element of viscoelastic material supported within the rotating cutting element; a damping mass supported solely by said element of viscoelastic material; said damping mass and said element of viscoelastic material cooperating to absorb vibrations from the cutting means; means to retain said damping mass and said element of viscoelastic material on the cutting means; said element of viscoelastic material having a conical shape; said damping mass having a conical surface to receive said conical-shaped element of viscoelastic material; and means to hold said element of viscoelastic material in engagement with the conical surface of said damping mass.
Claim 3
Dependent Claim
21 words
The vibration absorber according to claim 1 in which said element of viscoelastic material is a strip having its ends free.
Claim 4
Dependent Claim
18 words
The vibration absorber according to claim 1 in which said element of viscoelastic material is a continuous strip.
Claim 5
Dependent Claim
49 words
The vibration absorber according to claim 1 including means cooperating with said damping mass remote from the conical surface of said damping mass and with the cutting means to prevent said damping mass from spinning when the cutting means starts or stops, said cooperating means being a viscoelastic material.
Claim 6
Dependent Claim
114 words
A tuned damped vibration absorber for a machine tool having cutting means including a rotating cutting element, said absorber including: an element of viscoelastic material supported within the rotating cutting element; a damping mass supported solely by said element of viscoelastic material; said damping mass and said element of viscoelastic material cooperating to absorb vibrations from the cutting means; means to retain said damping mass and said element of viscoelastic material on the cutting means; and means to prevent said damping mass from spinning when the cutting means starts or stops, said preventing means comprising a plurality of elements of viscoelastic material disposed in recesses in both said damping mass and the cutting means.
Claim 7
Dependent Claim
114 words
A tuned damped vibration absorber for a machine tool having cutting means including a rotating cutting element, said absorber including: an element of viscoelastic material supported within the rotating cutting element; a damping mass supported solely by said element of viscoelastic material; said damping mass and said element of viscoelastic material cooperating to absorb vibrations from the cutting means; means to retain said damping mass and said element of viscoelastic material on the cutting means; and means to prevent said damping mass from spinning when the cutting means starts or stops, said preventing means comprising a plurality of elements of viscoelastic material disposed in recesses in both said damping mass and the cutting means.
Claim 8
Dependent Claim
16 words
The vibration absorber according to claim 1 in which said element of viscoelastic material is preloaded.
Claim 9
Dependent Claim
17 words
The vibration absorber according to claim 1 in which said damping mass partially surrounds said viscoelastic material.
Claim 10
Dependent Claim
21 words
The vibration absorber according to claim 5 in which said element of viscoelastic material preloads said elements of said preventing means.
Claim 11
Dependent Claim
18 words
The vibration absorber according to claim 8 in which said element of viscoelastic material has a conical shape.
Claim 12
Dependent Claim
16 words
The vibration absorber according to claim 5 in which said element of viscoelastic material is preloaded.
Claim 13
Dependent Claim
21 words
The vibration absorber according to claim 5 in which said element of viscoelastic material is a strip having its ends free.
Claim 14
Dependent Claim
18 words
The vibration absorber according to claim 5 in which said element of viscoelastic material is a continuous strip.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |