US3601229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic vibration damper
Assignee: Individual
•
Filing: 1969-06-09
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Granted: 1971-08-24
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Expires: 1989-06-09
Abstract
Abstract An hydraulic vibration damper arrests vibration of a boring bar, lathe chuck, or other support. It comprises an inertia member adapted to be mounted on the support for vibration-induced movement. A case is mounted for relative movement on one end of the inertia member with its walls spaced from the walls of the latter. Seal means divide the space between the walls into two chambers. Both chambers are filled with mercury or viscous oil. Upon vibration of the support, the liquid is driven from one side to the other, providing an hydraulic vibration damping effect which supplements the inertia damping effect of the inertia member. In addition, frictional engagement of the end of the inertia member with the case provides a frictional damping effect.
Inventors
- 👤 Norval E Shurtliff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:40
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0952; B23Q17/0971; B23Q17/0976; B23B; B23B29/00; B23B29/02; B23B29/022; Y; Y10; Y10S; Y10S82/00; Y10S82/904; Y10T; Y10T408/00; Y10T408/76
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
123 words
For use in arresting the vibration of a vibrating support, an hydraulic damper comprising: a. an inertia member adapted to be mounted on the support for vibration-induced movement, b. a case mounted on the inertia member with its walls spaced from the walls of the inertia member, c. the case and the inertia member being relatively movable transversely and longitudinally with respect to each other, and d. seal means sealing the space between the case and the inertia member and forming a chamber, e. the chamber being filled with liquid, f. the liquid upon relative movement of the case and the inertia member being driven from one side of the chamber to the other, thereby exerting an hydraulic damping effect upon the support.
Claim 2
Dependent Claim
123 words
For use in arresting the vibration of a vibrating support, an hydraulic damper comprising: a. an inertia member adapted to be mounted on the support for vibration-induced movement, b. a case mounted on the inertia member with its walls spaced from the walls of the inertia member, c. the case and the inertia member being relatively movable transversely and longitudinally with respect to each other, and d. seal means sealing the space between the case and the inertia member and forming a chamber, e. the chamber being filled with liquid, f. the liquid upon relative movement of the case and the inertia member being driven from one side of the chamber to the other, thereby exerting an hydraulic damping effect upon the support.
Claim 3
Dependent Claim
132 words
For use in arresting the vibration of a vibrating support, an hydraulic damper comprising: a. an inertia member adapted to be mounted on the support for vibration-induced movement, b. cap mounted on an end of the inertia member for transverse and longitudinal movement with its walls spaced from the walls of the inertia member, c. means for pressing the inertia member against the inner surface of the cap, forming a first chamber, d. seal means interposed between the sidewalls of the inertia member and the cap and defining a second chamber, e. tHe chambers being filled with liquid, f. the liquid upon relative movement of the case and the inertia member being driven from one side of the chambers to the other by relative movement of the case and the inertia member.
Claim 4
Dependent Claim
132 words
For use in arresting the vibration of a vibrating support, an hydraulic damper comprising: a. an inertia member adapted to be mounted on the support for vibration-induced movement, b. cap mounted on an end of the inertia member for transverse and longitudinal movement with its walls spaced from the walls of the inertia member, c. means for pressing the inertia member against the inner surface of the cap, forming a first chamber, d. seal means interposed between the sidewalls of the inertia member and the cap and defining a second chamber, e. tHe chambers being filled with liquid, f. the liquid upon relative movement of the case and the inertia member being driven from one side of the chambers to the other by relative movement of the case and the inertia member.
Claim 5
Dependent Claim
24 words
The damper of claim 2 including piston means mounted within the inertia member and exerting predetermined pressure on the liquid in the first chamber.
Claim 6
Dependent Claim
69 words
The damper of claim 2 wherein the outer end of the inertia member and the inner surface of the cap are tapered to provide bearing surfaces having a friction damping action and including spring-pressed means mounted in the inertia member and bearing against the liquid in the first chamber, the spring pressure being predetermined to adjust the frictional engagement of the inertia member and cap to a predetermined level.
Claim 7
Dependent Claim
40 words
The damper of claim 4 wherein the inertia member comprises an elongated body having a central axial bore communicating with the first chamber at its forward end and at its rearward end being enlarged to mount the spring-pressed piston means.
Claim 8
Dependent Claim
59 words
The damper of claim 2 wherein the inertia member is provided with an axial bore, communicating with one of the chambers, spring pressed piston means mounted in the bore, and a rod divided transversely into segments having a cross-sectional area less than the cross-sectional ares of the bore mounted within the bore in bearing engagement with the piston means.
Claim 9
Dependent Claim
100 words
The damper of claim 2 wherein the inertia member is provided with an axial bore communicating with the first chamber, spring-pressed piston means mounted in the bore, a rod divided transversely into segments having a cross-sectional area less than the cross-sectional area of the bore mounted within the bore in bearing engagement with the piston means, the outermost of the segments being spring pressed in a direction opposing the force of the piston means for retaining the segments in frictional abutting relationship to each other, the force exerted by the spring being less than that exerted by the piston means.
Claim 10
Dependent Claim
85 words
The damper of claim 2 wherein the inertia member is provided with an axial bore communicating with the first chamber, piston means mounted in the inner end of the bore, a second inertia member mounted in the forward part of the bore, the rearward end of the second inertia member engaging the piston means and the forward end being in frictional engagement with the inner surface of the cap, the second inertia member having a cross-sectional area less than the cross-sectional area of the bore.
Claim 11
Dependent Claim
19 words
The damper of claim 8 wherein the second inertia member comprises a hollow case filled with a damping liquid.
Claim 12
Dependent Claim
12 words
The damper of claim 2 wherein the liquid comprises a viscous oil.
Claim 13
Dependent Claim
10 words
The damper of claim 2 wherein the liquid comprises mercury.
Claim 14
Dependent Claim
15 words
The damper of claim 2 including a passageway interconnecting the two chambers from pressure equalization.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |