US4413863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic support device
Assignee: Centre dEtudes et de Recherches de la Machine Outil CERMO
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Filing: 1981-07-30
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Granted: 1983-11-08
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Expires: 2001-07-30
Abstract
Abstract The invention relates to a hydrostatic support device placed between two elements movable one with respect to the other, comprising a hydrostatic guide-block, a magnet being mounted on one of the said elements, opposite the second element, so that the latter is traversed by the lines of magnetic forces pulling the second element towards the first element. This device comprises a demagnetizing circuit associated to each magnet and constituted by an A.C.-supplied electro-magnet. The present invention finds an application in the production of hydrostatic guide-blocks for use in the construction of machine-tools.
Inventors
- 👤 Jean Lombard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:29
CPC Classifications
F; F16; F16C; F16C29/00; F16C29/02; F16C29/025; F16C29/12; F16C32/00; F16C32/06; F16C32/0662; F16C32/0666; F16C32/067; F16C32/0674; F16C2322/00; F16C2322/39
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
Hydrostatic support device for movably supporting one element above another element comprising: (a) at least one hydrostatic guide block mounted on one of said elements; (b) at least one magnet mounted on one of said elements such that the other element is traversed by the lines of magnetic forces thereby pulling the elements toward each other; and (c) demagnetizing means associated with the magnet, said demagnetizing means comprising an electromagnet electrically connected to an A.C. power source, and located such that the poles of the electromagnet extend beyond each hydrostatic guide block and are offset with respect to the active face of said guide block.
Claim 2
Dependent Claim
105 words
Hydrostatic support device for movably supporting one element above another element comprising: (a) at least one hydrostatic guide block mounted on one of said elements; (b) at least one magnet mounted on one of said elements such that the other element is traversed by the lines of magnetic forces thereby pulling the elements toward each other; and (c) demagnetizing means associated with the magnet, said demagnetizing means comprising an electromagnet electrically connected to an A.C. power source, and located such that the poles of the electromagnet extend beyond each hydrostatic guide block and are offset with respect to the active face of said guide block.
Claim 3
Dependent Claim
86 words
Hydrostatic device as claimed in claim 1 wherein the magnet: is associated with the hydrostatic guide-block; is mounted substantially symmetrically with respect to a median plane of the said hydrostatic guide-block taken perpendicular to the direction of relative movement of the two elements; and comprises a U-shaped armature, the ends of the two branches of which issue into a pressure pocket of the hydrostatic guide-block whilst being slightly offset inside said pocket from the line joining the opposite edges of the border delimiting the said pocket.
Claim 4
Dependent Claim
29 words
Hydrostatic device as claimed in claim 1, wherein each magnet also comprises an electro-magnet having a coil connected to a device for adjusting the intensity of the magnetizing current.
Claim 5
Dependent Claim
29 words
Hydrostatic device as claimed in claim 2, wherein each magnet also comprises an electromagnet having a coil connected to a device for adjusting the intensity of the magnetizing current.
Claim 6
Dependent Claim
149 words
Hydrostatic support device for movably supporting one element above another element comprising: (a) at least one hydrostatic guide block mounted on one of said elements; (b) at least one magnet mounted on one of said elements such that the other element is traversed by the lines of magnetic forces thereby pulling the elements toward each other, the magnet being mounted substantially symmetrically with respect to a median plane of said hydrostatic guide block taken perpendicular to the direction of relative movement of the two elements and comprising a U-shaped armature, the ends of the two branches of which issue into a pressure pocket of the hydrostatic guide block whilst slightly offset inside said pocket from the line joining the opposite edges of the border delimiting the said pocket; and (c) demagnetizing means associated with each magnet, said demagnetizing means comprising an electromagnet electrically connected to an A.C. power source.
Claim 7
Dependent Claim
149 words
Hydrostatic support device for movably supporting one element above another element comprising: (a) at least one hydrostatic guide block mounted on one of said elements; (b) at least one magnet mounted on one of said elements such that the other element is traversed by the lines of magnetic forces thereby pulling the elements toward each other, the magnet being mounted substantially symmetrically with respect to a median plane of said hydrostatic guide block taken perpendicular to the direction of relative movement of the two elements and comprising a U-shaped armature, the ends of the two branches of which issue into a pressure pocket of the hydrostatic guide block whilst slightly offset inside said pocket from the line joining the opposite edges of the border delimiting the said pocket; and (c) demagnetizing means associated with each magnet, said demagnetizing means comprising an electromagnet electrically connected to an A.C. power source.
Claim 8
Dependent Claim
29 words
Hydrostatic device as claimed in claim 5 wherein each magnet also comprises an electromagnet having a coil connected to a device for adjusting the intensity of the magnetizing current.
References Cited (Backward Citations)
AT194216B
Cited
US3164753A
Cited
FR1353247A
Cited
CH415188A
Cited
GB1236411A
Cited
US3746407A
Cited
US3947153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |