Patent US3908318A successfully refreshed from Google Patents.
US3908318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of vibration dampening by surface griding
Assignee: AMBAR INVESTMENT Inc
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Filing: 1974-03-22
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Granted: 1975-09-30
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Expires: 1994-03-22
Abstract
Abstract The invention refers to a method of vibration damping in order to reduce vibrations of supports of slabs, for surface grinding. Individual supports, regularly arranged over the surface of a grinding table consist of hydraulic cylinders communicating with each other and lockable in reached final positions in contact with the slab. Between groups of cylinders valves are arranged for accommodating the number of active cylinders to the size of the slab on the table.
Inventors
- 👤 Sven-Herman Wallin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:23
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/0054; B23Q1/03; B23Q1/032; B24; B24B; B24B41/00; B24B41/06; B24B41/068
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
189 words
A levelling and vibration damping support system for a slab that is to be ground, said system being characterized by a. a horizontally disposed table bed, b. a plurality of upright hydraulic cylinders secured in a pattern on top of said table bed so that the upper portions of said cylinders will support said slab, c. a closed hydraulic communicating system interconnecting the hydraulic cylinders that are to support the slab, d. a plurality of magnetically operated valves in said system for controlling the flow of hydraulic fluid to and from each hydraulic cylinder, and e. means for activating or deactivating each of said magnetically operated valves, whereby when a slab is placed upon said upper portions of said pattern of hydraulic cylinders, all of said magnetically operated valves can be unlocked at once so as to equalize the pressure of the hydraulic fluid in each of said hydraulic cylinders and after the loading of the slab on said cylinders is accomplished and the grinding is to start, the magnetically operated valves can be locked so that there is no flow of fluid between any of the hydraulic cylinders.
Claim 2
Dependent Claim
189 words
A levelling and vibration damping support system for a slab that is to be ground, said system being characterized by a. a horizontally disposed table bed, b. a plurality of upright hydraulic cylinders secured in a pattern on top of said table bed so that the upper portions of said cylinders will support said slab, c. a closed hydraulic communicating system interconnecting the hydraulic cylinders that are to support the slab, d. a plurality of magnetically operated valves in said system for controlling the flow of hydraulic fluid to and from each hydraulic cylinder, and e. means for activating or deactivating each of said magnetically operated valves, whereby when a slab is placed upon said upper portions of said pattern of hydraulic cylinders, all of said magnetically operated valves can be unlocked at once so as to equalize the pressure of the hydraulic fluid in each of said hydraulic cylinders and after the loading of the slab on said cylinders is accomplished and the grinding is to start, the magnetically operated valves can be locked so that there is no flow of fluid between any of the hydraulic cylinders.
Claim 3
Dependent Claim
27 words
A system according to claim 1 in which the cylinders are arranged in a regular pattern of longitudinal and transverse rows with respect to the table bed.
Claim 4
Dependent Claim
29 words
A system according to claim 2 in which rows of cylinders not covered by a loading slab can be disconnected by said means for deactivating said magnetically operated valves.
Claim 5
Dependent Claim
25 words
A system according to claim 1 in which the magnetically operated valves are closed by the absence of a control current used for their operation.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |