US3674112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centralized lubrication system
Assignee: Lubriquip Inc
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Filing: 1970-06-30
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Granted: 1972-07-04
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Expires: 1990-06-30
Abstract
Abstract A centralized lubrication system of the type in which a distributor periodically injects a predetermined quantity of lubricant to each of a plurality of lubrication sites in a predetermined sequence, including sensor means associated with each of the sites, a control means which receives signals from each of the sensor means, and an auxiliary delivery means actuated by the control means to inject additional amounts of lubricant to flood the lubrication site when the sensor associated with that site indicates that an excessive temperature has been reached. The control means may also include means for resetting the sensors after the condition of excessive temperature is reached to determine whether the flooding of the site has been effective to reduce the temperature below the predetermined maximum. Additionally, the system may include a timer which cuts off the additional supply of lubricant and signals that the particular site is in such a condition that additional amounts of lubricant are ineffective to reduce the temperature to an acceptable value.
Inventors
- 👤 Robert D Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:22
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/14; F; F01; F01M; F01M1/00; F01M1/18; F16; F16C; F16C17/00; F16C17/12; F16C17/24; F16C17/243; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/1045; F16N; F16N29/00; F16N29/02; F16C2300/00; F16C2300/02; F16N2230/00; F16N2230/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A centralized lubrication system for lubricating a plurality of points comprising distributor means arranged for connection to a source of pressurized lubricant and including first delivery means for delivering a predetermined quantity of lubricant to each of said plurality of points in a predetermined sequence, sensor means at each of said points of use for sensing the temperatures thereof, a thermally responsive element in each of said sensor means whose electrical resistance varies as a function of temperature, control means including said thermally responsive element as a current determining element therein, and second delivery means actuated by said control means and responsive to a change in resistance of said thermally responsive element indicative of an excessive temperature condition to deliver amounts of lubricant in excess of said predetermined quantity to the ones of said points in which the temperature is excessive until the temperature thereof is reduced.
Claim 2
Dependent Claim
147 words
A centralized lubrication system for lubricating a plurality of points comprising distributor means arranged for connection to a source of pressurized lubricant and including first delivery means for delivering a predetermined quantity of lubricant to each of said plurality of points in a predetermined sequence, sensor means at each of said points of use for sensing the temperatures thereof, a thermally responsive element in each of said sensor means whose electrical resistance varies as a function of temperature, control means including said thermally responsive element as a current determining element therein, and second delivery means actuated by said control means and responsive to a change in resistance of said thermally responsive element indicative of an excessive temperature condition to deliver amounts of lubricant in excess of said predetermined quantity to the ones of said points in which the temperature is excessive until the temperature thereof is reduced.
Claim 3
Dependent Claim
38 words
The system of claim 1 which includes reset means in each of said sensor means and a cycle timing means operable upon the sensor means reaching a predetermined temperature to send a resetting signal to said reset means.
Claim 4
Dependent Claim
46 words
The system of claim 2 which includes an overtime timing means actuated at the expiration of a predetermined cycle of said cycle timing means to discontinue delivery of said additional amounts of lubricant to the ones of said points at which an excessive temperature still exists.
Claim 5
Dependent Claim
13 words
The system of claim 1 in which each sensor means includes a thermistor.
Claim 6
Dependent Claim
17 words
The system of claim 1 in which said distributor means is a single line cyclic lubricant distributor.
Claim 7
Dependent Claim
94 words
The system of claim 1 in which each of said sensor means includes a thermistor, a resistance sensing circuit including a relay having a coil, means for supplying said relay coil with half wave pulses, a gating device connected to said relay coil, means connecting said thermistor to said gating device whereby said relay coil is energized with half wave pulses of opposite polarity from the aforementioned pulses upon energization of the gating device by increased current flow through said thermistor, and indicator means operable by said relay upon energization of said gating device.
Claim 8
Dependent Claim
27 words
The system of claim 1 in which said second delivery means delivers a continuous stream of lubricant to flood the point at which the excessive temperature exists.
Claim 9
Dependent Claim
20 words
The system of claim 3 which includes a signalling means connected to said overtime timing means to indicate energization thereof.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |