US4640771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid intake screening device
Assignee: Caterpillar Inc
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Filing: 1982-11-04
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Granted: 1987-02-03
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Expires: 2002-11-04
Abstract
Abstract A fluid intake screening device (10) is installed in a case (12) defining a sump (14), an opening (20), and an intake passage (28). A tubular baffle member (36) extends from the opening (20) into the sump (14), supports a tubular filter assembly (34) within it, and defines a chamber (52) therebetween. The baffle member (36) has a slot (54) for controllably directing fluid from the sump (14) to the chamber (52). An indexing apparatus (56) positions the slot (54) of the baffle member (36) and adjacent the bottom of the sump (14) and minimizes fluid aeration and turbulence with low fluid levels. A closure apparatus (38) can be removed from the case (12) to permit servicing of the filter assembly (34).
Inventors
- 👤 Charles E. Whalen
- 👤 Wilbur G. Hoover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:46
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D35/00; B01D35/02; B01D35/027; B01D35/0273; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/306
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
220 words
A fluid intake screening device (10) comprising: a case (12) defining a sump (14), an opening (20) therethrough having inner and outer ends (22,24) and an outwardly facing shoulder (48) therebetween, and an intake passage (28) communicating with the opening (20) intermediate the ends (22,24); a tubular filter assembly (34) including a tubular filter element (62) and a skeleton frame (64) of a construction sufficient for protectingly supporting the filter element (62) concentrically therewithin; a tubular baffle member (36) releasably connected to the case (12) and extending from the inner end (22) of the opening (20) into the sump (14), the baffle member (36) supporting the skeleton frame (64) of the filter assembly (34) concentrically therewithin and defining therewith a generally tubular chamber (52) therebetween, the baffle member (36) defining flow directing means (50) for controllably directing fluid flow from the sump (14) to the chamber (52) in a limited region of the baffle member (36); and closure means (38) for blocking the outer end (24) of the opening (20) and urging the skeleton frame (64) against the baffle member (36) and the baffle member (36) seatably against the shoulder (48) and alternatively permitting the removal of the filter assembly (34) and the baffle member (36) for servicing upon the release of the closure means (38) from the case (12).
Claim 2
Dependent Claim
220 words
A fluid intake screening device (10) comprising: a case (12) defining a sump (14), an opening (20) therethrough having inner and outer ends (22,24) and an outwardly facing shoulder (48) therebetween, and an intake passage (28) communicating with the opening (20) intermediate the ends (22,24); a tubular filter assembly (34) including a tubular filter element (62) and a skeleton frame (64) of a construction sufficient for protectingly supporting the filter element (62) concentrically therewithin; a tubular baffle member (36) releasably connected to the case (12) and extending from the inner end (22) of the opening (20) into the sump (14), the baffle member (36) supporting the skeleton frame (64) of the filter assembly (34) concentrically therewithin and defining therewith a generally tubular chamber (52) therebetween, the baffle member (36) defining flow directing means (50) for controllably directing fluid flow from the sump (14) to the chamber (52) in a limited region of the baffle member (36); and closure means (38) for blocking the outer end (24) of the opening (20) and urging the skeleton frame (64) against the baffle member (36) and the baffle member (36) seatably against the shoulder (48) and alternatively permitting the removal of the filter assembly (34) and the baffle member (36) for servicing upon the release of the closure means (38) from the case (12).
Claim 3
Dependent Claim
42 words
The intake screening device (10) of claim 1 wherein the case (12) defines a depression (58) and the baffle member (36) defines a projection (60) receivable in the depression sufficient to locate the flow directing means (50) in a preselected angular attitude.
Claim 4
Dependent Claim
34 words
The intake screening device (10) of claim 2 wherein the flow directing means (50) is a slot (54) located by the projection (60) and depression (58) at the bottom of the baffle member (36).
Claim 5
Dependent Claim
25 words
The intake screening device (10) of claim 1 wherein the skeleton frame (64) has a flanged head portion (66) located at the intake passage (28).
Claim 6
Dependent Claim
39 words
The intake screening device (10) of claim 4 wherein the closure means (38) includes a fastener (78) screwthreadably received in the case opening (20) and a resilient element (84) located between the fastener (78) and the filter assembly (34).
Claim 7
Dependent Claim
50 words
The intake screening device (10) of claim 1 wherein the closure means (38) includes a releasable fastener (78) and a resilient member (84) bearable against the fastener (78) for urging the tubular filter assembly (34) against the baffle member (36), and the baffle member (36) seatably against the shoulder (48).
Claim 8
Dependent Claim
51 words
The intake screening device (10) of claim 1 wherein the baffle member (36) has a flanged head portion (40) engageable against the shoulder (48), and the skeleton frame (64) of the filter assembly (34) has a flanged head portion (66) engageable against the head portion (40) of the baffle member (36).
Claim 9
Dependent Claim
136 words
A fluid intake screening device (10) adapted for insertion into a case (12) defining a sump (14), an opening (20) therethrough having inner and outer ends (22,24), and an outwardly facing shoulder (48) therebetween, comprising: a tubular filter assembly (34) including a filter element (62) and a skeleton frame (64) of a construction sufficient for protectively supporting the filter element (62) concentrically therewithin; a tubular baffle member (36) supporting the skeleton frame (64) concentrically therewithin and being extendable from the inner end (22) of the opening (20) into the sump (14) and defining an opening (54) therethrough; and releasable closure means (38) for blocking the outer end (24) of the opening (20) and resiliently urging the skeleton frame (64) against the baffle member (36) and the baffle member (36) into seated engagement against the shoulder (48).
Claim 10
Dependent Claim
136 words
A fluid intake screening device (10) adapted for insertion into a case (12) defining a sump (14), an opening (20) therethrough having inner and outer ends (22,24), and an outwardly facing shoulder (48) therebetween, comprising: a tubular filter assembly (34) including a filter element (62) and a skeleton frame (64) of a construction sufficient for protectively supporting the filter element (62) concentrically therewithin; a tubular baffle member (36) supporting the skeleton frame (64) concentrically therewithin and being extendable from the inner end (22) of the opening (20) into the sump (14) and defining an opening (54) therethrough; and releasable closure means (38) for blocking the outer end (24) of the opening (20) and resiliently urging the skeleton frame (64) against the baffle member (36) and the baffle member (36) into seated engagement against the shoulder (48).
Claim 11
Dependent Claim
39 words
The fluid intake screening device of claim 8 wherein the closure means (38) includes a releasable fastener (78) and a resilient member (84) bearable against the fastener (78) and continually urging the skeleton frame (64) toward the shoulder (48).
Claim 12
Dependent Claim
46 words
The fluid intake screening device of claim 9 wherein the baffle member (36) has a flanged head portion (40) engageable against the shoulder (48) and the skeleton frame (64) has a flanged head portion (66) engageable against the head portion (40) of the baffle member (36).
Claim 13
Dependent Claim
70 words
The fluid intake screening device of claim 8 wherein the case (12) defines an intake passage (28) in communication with the opening (20), the filter assembly (34) and baffle member (36) being so constructed and arranged that, in use, fluid flows from the sump (14) into the opening (54) in a preselected region of the baffle member (36), inwardly through the filter element (62) and to the intake passage (28).
References Cited (Backward Citations)
US1305735A
Cited
US880240A
Cited
US1800585A
Cited
US1694668A
Cited
US2057779A
Cited
US2744776A
Cited
US2788129A
Cited
US3456799A
Cited
US3447685A
Cited
US3662887A
Cited
US4082665A
Cited
US4279746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |