US4772402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coolant processing system
Assignee: NUMOR SYSTEMS COMPANY A CO-PARTNERSHIP OF MI
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Filing: 1987-05-06
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Granted: 1988-09-20
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Expires: 2007-05-06
Abstract
Abstract A system for processing and reclaiming machine tool coolant wherein filtering apparatus mounted upon a portable frame is transported to the machine tool and includes pumps for cycling coolant from the machine tool coolant reservoir through coarse and fine filters to remove contaminating foreign matter, including bacteria. The apparatus includes an accumulating reservoir receiving and supplying pumped coolant and the pumps are controlled by float-operated switches maintaining a sequence of pump operation to assure efficient pump operation.
Inventors
- 👤 Ray B. Love
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:14
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/02; B24B55/03; B01; B01D; B01D36/00; B01D36/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
97 words
A process comprising reclaiming machine tool coolant within a machine tool coolant circulation system wherein the machine tool coolant circulation system includes a reservoir by (a) pumping the coolant from the machine tool reservoir into a first filter, (b) filtering the larger foreign matter particles from the coolant to produce a coarse filtered first filtered coolant, (c) pumping said first filtered coolant through a second filter to produce a finely filtered second filtered coolant, and (d) discharging said second filtered coolant into the machine tool reservoir until the coolant within the reservoir attains an acceptable filtered condition.
Claim 2
Dependent Claim
36 words
In a process for reclaiming machine tool coolant as in claim 1 including the step of: (a) accumulating said first filtered coolant in a receptacle prior to pumping said first filtered coolant through the second filter.
Claim 3
Dependent Claim
25 words
In a process for reclaiming machine tool coolant as in claim 1, the second filter removing the majority of bacteria from said second filtered coolant.
Claim 4
Dependent Claim
152 words
Apparatus comprising: means for reclaiming machine tool coolant within a tool coolant circulation system, including, a frame, first and second electrically operated pumps mounted upon said frame, each of said pumps having an inlet and an outlet, a first conduit connected to said first pump inlet for receiving coolant from a machine tool, a second conduit connected to said first pump outlet, an accumulation reservoir defined on said frame, said second conduit discharging into said reservoir, control means for said first and second pumps mounted on said frame sensing the coolant level within said reservoir, a third conduit connected to said second pump inlet and in communication with said reservoir, a fine filter mounted on said frame having an inlet and an outlet, a fourth conduit connecting said second pump outlet with said filter inlet, and a fifth conduit connected to said filter outlet for returning filtered coolant to the machine tool.
Claim 5
Dependent Claim
32 words
Apparatus for reclaiming machine tool coolant as in claim 4, a coarse filter within said reservoir, said second conduit discharging into said coarse filter and said coarse filter discharging into said reservoir.
Claim 6
Dependent Claim
50 words
Apparatus for reclaiming machine tool coolant as in claim 5, said coarse filter comprising a basket located within said reservoir defined by bottom and side walls, and a screened opening defined in at least one of said walls in communication with said reservoir, said second conduit discharging into said basket.
Claim 7
Dependent Claim
38 words
Apparatus for reclaiming machine tool coolant as in claim 6, said reservoir comprising first and second chambers, a weir separating said chambers, said basket being located within said first chamber, said third conduit communicating with said second chamber.
Claim 8
Dependent Claim
20 words
Apparatus for reclaiming machine tool coolant as in claim 7, a flotation baffle interposed between said first and second chambers.
Claim 9
Dependent Claim
37 words
Apparatus for reclaiming machine tool coolant as in claim 4, a coarse filter mounted upon said frame having an inlet in communication with the discharge of said second conduit and an outlet in communication with said reservoir.
Claim 10
Dependent Claim
55 words
Apparatus for reclaiming machine tool coolant as in claim 4, said control means comprising a first float-operated switch mounted on said frame controlling operation of said first pump having a float within said reservoir, and a second float-operated switch mounted on said frame controlling operation of said second pump having a float within said reservoir.
Claim 11
Dependent Claim
90 words
Apparatus for reclaiming machine tool coolant as in claim 4, said fine filter comprising a receptacle having a flow passage defined therein, a filter element within said receptacle flow passage and having upstream and downstream sides, upstream and downstream chambers defined in said receptacles on opposite sides of said filter element adjacent corresponding filter element sides, said filter inlet being in communication with said upstream chamber and said filter outlet being in communication with said downstream chamber, and filter element positioning means located within said receptacle positioning said element therein.
Claim 12
Dependent Claim
16 words
Apparatus for reclaiming machine tool coolant as in claim 11, said filter element comprising activated charcoal.
Claim 13
Dependent Claim
31 words
Apparatus for reclaiming machine tool coolant as in claim 11, said filter element positioning means comprising perforated plates and spacer columns affixed to each plate, a plate engaging each element side.
Claim 14
Dependent Claim
34 words
Apparatus for reclaiming machine tool coolant as in claim 11, flow control means within said receptacle upstream chamber located between filter inlet and said filter element upstream side directing fluid toward said filter element.
Claim 15
Dependent Claim
28 words
Apparatus for reclaiming machine tool coolant as in claim 14, said flow control means comprising a conical deflector having a central opening and converging toward said filter element.
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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |