US3782501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating-oil control device for use in machines, for instance machine tools
Assignee: Olivetti SpA
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Filing: 1971-02-22
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Granted: 1974-01-01
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Expires: 1991-02-22
Abstract
Abstract A machine control device for arresting the operation of a machine in response to an insufficient rate of lubricant flow in the machine lubrication system. A chamber interposed in the lubricant return circuit to the reservoir comprises a float for sensing the level of lubricant therein, an upper discharge port, and a lower discharge port of such size as to allow a flow equal to that necessary in the lubrication system to allow the machine to complete its cycle. A signal responsive to a predetermined position of the float announces the condition of insufficient rate of flow, and provides an input to an AND gate. The other input to the AND gate is provided by the machine control system at the end of a cycle, whereby the arresting of machine operation thereupon occurs.
Inventors
- 👤 E Pagella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:31
CPC Classifications
F; F16; F16N; F16N29/00; F16N29/04; B; B23; B23Q; B23Q11/00; B23Q11/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
158 words
A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a first chamber of predetermined capacity having first and second discharge of openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, a second chamber in communication with the machine and with said first chamber for admitting lubricant to said first chamber, a third chamber in communication with said first and second discharge openings and in communication with said reservoir for admitting lubricant to said reservoir, lubricant level sensing means comprising a float in said first chamber, and signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said first chamber is below said second discharge opening.
Claim 2
Dependent Claim
158 words
A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a first chamber of predetermined capacity having first and second discharge of openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, a second chamber in communication with the machine and with said first chamber for admitting lubricant to said first chamber, a third chamber in communication with said first and second discharge openings and in communication with said reservoir for admitting lubricant to said reservoir, lubricant level sensing means comprising a float in said first chamber, and signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said first chamber is below said second discharge opening.
Claim 3
Dependent Claim
23 words
A machine lubrication system according to claim 1 wherein said second discharge opening is located in a plane above said first discharge opening.
Claim 4
Dependent Claim
216 words
A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising a relay circuit actuated by said switch, a visual signal switch enabled by said relay circuit for operating a visual signal, and an AND gate having a first input enabled by said relay circuit and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.
Claim 5
Dependent Claim
216 words
A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising a relay circuit actuated by said switch, a visual signal switch enabled by said relay circuit for operating a visual signal, and an AND gate having a first input enabled by said relay circuit and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.
Claim 6
Dependent Claim
195 words
A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising an AND gate having a first input from means operated by said switch and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.
Claim 7
Dependent Claim
195 words
A machine lubrication system for sending lubricant along a closed flow path, said machine being adapted to effect several working cycles, said system comprising: a chamber of predetermined capacity having first and second discharge openings, said first discharge opening being of such size as to allow therethrough a predetermined rate of flow sufficient for proper machine lubrication for the longest working cycle of the machine, lubricant level sensing means comprising a float in said chamber, signal means responsive to a decrease in the rate of flow of said lubricant comprising a switch operated by said float whenever the lubricant level in said chamber is below said second discharge opening, and a program unit for controlling the machine, said program unit generating at the end of each machine cycle an end-of-cycle signal and being capable of arresting the operation of the machine in response to an arresting signal, said program unit comprising an AND gate having a first input from means operated by said switch and a second input comprising said end-of-cycle signal, said AND gate generating an output arresting signal upon receipt of said first and second inputs for arresting the operation of said machine.
References Cited (Backward Citations)
US2713678A
Cited
US2543784A
Cited
US2676315A
Cited
US2675514A
Cited
US2751044A
Cited
US2934861A
Cited
US3358790A
Cited
US3507359A
Cited
US3583437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |