US3750888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter assembly
Assignee: Caterpillar Inc
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Filing: 1971-09-13
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Granted: 1973-08-07
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Expires: 1991-09-13
Abstract
Abstract A filter assembly for filtering fluid returning to a reservoir including a filter housing, a base closing one end of the housing, an outlet port in the base, and a perforated fluiddiffusing member enclosing said base together with the housing in an axially stacked arrangement therewith to disperse the discharge of fluid from the outlet port in a relatively wide flow pattern in order to minimize surface turbulence and resultant aeration of the fluid within the reservoir.
Inventors
- 👤 J Rinaldo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:42
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/041; B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D35/00; B01D35/14; B01D35/147; B01D2201/00; B01D2201/18; B01D2201/182
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
122 words
A cartridge-type filter assembly comprising a longitudinal tubular housing, having a top end and a discharge end, a fluid inlet into said tubular housing near the top end thereof, the discharge end of said housing extending into a reservoir; a base within said tubular housing disposed at the discharge end of said housing; a fluid outlet port formed in said base, a filter element within said housing disposed between said fluid inlet and said fluid outlet, and a perforated frustoconical shaped fluid-diffusing means having a plurality of apertures formed therein and enclosing said base in cooperation with said housing to communicate and disperse fluid discharged from the outlet port in said base in a relatively wide flow pattern directly into said reservoir.
Claim 2
Dependent Claim
122 words
A cartridge-type filter assembly comprising a longitudinal tubular housing, having a top end and a discharge end, a fluid inlet into said tubular housing near the top end thereof, the discharge end of said housing extending into a reservoir; a base within said tubular housing disposed at the discharge end of said housing; a fluid outlet port formed in said base, a filter element within said housing disposed between said fluid inlet and said fluid outlet, and a perforated frustoconical shaped fluid-diffusing means having a plurality of apertures formed therein and enclosing said base in cooperation with said housing to communicate and disperse fluid discharged from the outlet port in said base in a relatively wide flow pattern directly into said reservoir.
Claim 3
Dependent Claim
22 words
The filter assembly of claim 1 wherein said perforated diffusing means, said base and said filter housing form an axially aligned unit.
Claim 4
Dependent Claim
42 words
The filter assembly of claim 1 wherein the base is a generally frustoconical member having an upper smaller end and a larger lower end, and has an annular flange at the larger end thereof which abuts the discharge end of the housing.
Claim 5
Dependent Claim
40 words
The invention defined in claim 3 wherein said frustoconical member has an annular flat formed in the side thereof to provide a seat for an annular filter cartridge, and wherein said outlet port is formed in the smaller end thereof.
Claim 6
Dependent Claim
30 words
The filter assembly of claim 1 wherein said perforated diffusing member includes an annular flange which abuts the base and extends circumferentially of the housing at the discharge end thereof.
Claim 7
Dependent Claim
14 words
The filter assembly of claim 5 wherein said flange is welded to said housing.
Claim 8
Dependent Claim
28 words
The filter assembly of claim 5 further comprising a tie-bolt extending therethrough along the axis thereof, and a nut abutting said diffusing member and threadably engaging said tie-bolt.
Claim 9
Dependent Claim
32 words
The invention defined in claim 7 wherein said nut is secured to said diffusing member. 9 The invention of claim 4 further comprising a tubular filter cartridge seated on the annular flat.
References Cited (Backward Citations)
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US1609856A
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US3256989A
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US3353680A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |