US3970563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and bypass valve arrangement
Assignee: Caterpillar Inc
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Filing: 1975-01-15
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Granted: 1976-07-20
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Expires: 1995-01-15
Abstract
Abstract A system for filtering hydraulic fluid wherein a high flow rate of uncontaminated fluid is required. A filling facility is provided for initial filling or for the addition of make-up fluid to the system which facility assures that such added fluid must pass through a filtration unit prior to integration with fluid already in the system. A by-pass valve is provided to provide pressure relief in the event that the filtration unit becomes clogged during use. The valve, along with an accompanying coarse filtration unit, are readily manually removable from the system for cleaning or repair.
Inventors
- 👤 Edward A. Codo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:02
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/027; B01D35/14; B01D35/147; Y; Y10; Y10T; Y10T137/00; Y10T137/7504
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
In a fluid supply system, a readily removable valve assembly comprising: a housing member, said housing member having a pair of recesses therein, valve means mounted within and removable from said housing member, bail means attached to said valve means and movable between a first position out of the fluid flow path and a second position, said bail means having two end portions each of which being constructed and arranged for engagement with one of said recesses, lug means associated with said valve means for coacting with said bail means to cause the retraction of said end portions from said recesses in said housing member upon movement of said bail means from said first position to said second position to allow removal of said bail means and said valve means from said housing member.
Claim 2
Dependent Claim
134 words
In a fluid supply system, a readily removable valve assembly comprising: a housing member, said housing member having a pair of recesses therein, valve means mounted within and removable from said housing member, bail means attached to said valve means and movable between a first position out of the fluid flow path and a second position, said bail means having two end portions each of which being constructed and arranged for engagement with one of said recesses, lug means associated with said valve means for coacting with said bail means to cause the retraction of said end portions from said recesses in said housing member upon movement of said bail means from said first position to said second position to allow removal of said bail means and said valve means from said housing member.
Claim 3
Dependent Claim
38 words
The invention of claim 1 wherein said valve means include gross filtration basket means and wherein said basket means is removable with said valve means and said bail means upon retraction of said end portions from said recesses.
References Cited (Backward Citations)
US1790603A
Cited
CA549618A
Cited
US2709524A
Cited
US3107687A
Cited
US3348689A
Cited
US3388864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |