Patent US5840094A successfully refreshed from Google Patents.
US5840094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter element; assembly; and, method
Assignee: Donaldson Co Inc
•
Filing: 1997-11-12
•
Granted: 1998-11-24
•
Expires: 2017-11-12
Abstract
Abstract A filter assembly having first and second opposite frame members and a filter element removably secured to the first and second frame members is provided. The filter element is preferably a pleated paper filter, positioned in extension between opposite end panels. An arrangement is provided for securing the end panels to, and in extension between, the first and second opposite frame members. When the arrangement is assembled, an outer frame comprising the two frame members in the two end panels is provided. In the assembly, the pleated filter fills the area within the frame. The filter media can be conveniently removed and replaced in the frame, as desired.
Inventors
- 👤 Richard J. Osendorf
- 👤 Brad Alan Terlson
- 👤 Wallace Ronald Saldin
- 👤 Eugene Joseph Takach, Jr.
- 👤 Timothy John Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:39
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/0001; B01D46/0002; B01D46/0005; B01D46/10
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
187 words
A filter assembly comprising: (a) first and second, opposite, separate frame members; (i) each frame member comprising an elongate extension having first and second sides; (b) a filter element removably and replaceably secured to said first and second frame members; said filter element comprising: (i) a filter media member; and, (ii) first and second, opposite, end panels; said filter member being secured in extension between said first and second end panels; (A) each one of said first and second end panels having first and second engagement portions hingedly secured thereto: (c) each frame member having a filter element panel engagement arrangement on a side thereof opposite from a side directed toward said filter media member; and (d) said filter element being releasably secured to said first and second, opposite, frame members, by selected engagement between said engagement portions of said end panels and said panel engagement arrangement of each frame member; and said filter element being selectively removable and replaceable from said first and second frame members by selected disengagement between said engagement portions of said end panels and said panel engagement arrangement of each frame member.
Claim 2
Dependent Claim
187 words
A filter assembly comprising: (a) first and second, opposite, separate frame members; (i) each frame member comprising an elongate extension having first and second sides; (b) a filter element removably and replaceably secured to said first and second frame members; said filter element comprising: (i) a filter media member; and, (ii) first and second, opposite, end panels; said filter member being secured in extension between said first and second end panels; (A) each one of said first and second end panels having first and second engagement portions hingedly secured thereto: (c) each frame member having a filter element panel engagement arrangement on a side thereof opposite from a side directed toward said filter media member; and (d) said filter element being releasably secured to said first and second, opposite, frame members, by selected engagement between said engagement portions of said end panels and said panel engagement arrangement of each frame member; and said filter element being selectively removable and replaceable from said first and second frame members by selected disengagement between said engagement portions of said end panels and said panel engagement arrangement of each frame member.
Claim 3
Dependent Claim
33 words
A filter assembly according to claim 1 wherein: (a) each filter panel engagement arrangement comprises a pair of projections constructed and arranged to form receiving slots for selected portions of said end panels.
Claim 4
Dependent Claim
74 words
A filter assembly according to claim 2 wherein: (a) said engagement portions of said end panels includes on each of said end panels first and second, opposite, end tabs hingedly secured therein; and, (b) each filter panel engagement arrangement comprises a pair of longitudinal rails, positioned on a side of each frame member elongate extension, sized and configured to receive a selected portion of one end tab from each end panel thereunder, during assembly.
Claim 5
Dependent Claim
39 words
A filter assembly according to claim 3 wherein: (a) each longitudinal rail, of each filter panel engagement arrangement, is sized and configured to apply a clamping pressure to a selected portion of each end tab positioned thereunder, during assembly.
Claim 6
Dependent Claim
16 words
A filter assembly according to claim 4 wherein: (a) each frame member comprises an elongate extrusion.
Claim 7
Dependent Claim
17 words
A filter assembly according to claim 5 wherein: (a) each frame member comprises an elongate plastic extrusion.
Claim 8
Dependent Claim
23 words
A filter assembly according to claim 4 wherein: (a) said filter media member is pleated and includes at least one pleat spacer therein.
Claim 9
Dependent Claim
17 words
A filter assembly according to claim 7 wherein: (a) each pleat spacer comprises a molded plastic spacer.
Claim 10
Dependent Claim
59 words
A filter assembly according to claim 4 wherein: (a) each longitudinal rail comprises a clamping surface spaced, nominally, from a second side of an associated one of said frame members, by a first distance; and, (b) each end tab has a first thickness; (i) said first distance being within a range of 30% to 70% of said first thickness.
Claim 11
Dependent Claim
29 words
A filter assembly according to claim 9 wherein: (a) each clamping surface of each longitudinal rail is secured with an associated frame member by an elongate, curved, spring extension.
Claim 12
Dependent Claim
25 words
A filter assembly according to claim 10 wherein: (a) said elongate, curved, spring extension has a curvature with a radius of 0.17 to 0.19 inch.
Claim 13
Dependent Claim
70 words
A pleat spacer comprising: (a) a molded, plastic, comb having a plurality of pleat spacing fingers projecting outwardly therefrom; (b) a media pincher positioned between each pair of adjacent fingers in said pleat spacer; (i) each media pincher comprising a pair of beads forming an s-shaped media bite; said media pincher being constructed and arranged to provide for gripping of filter media when selectively positioned in contact with filter media.
Claim 14
Dependent Claim
70 words
A pleat spacer comprising: (a) a molded, plastic, comb having a plurality of pleat spacing fingers projecting outwardly therefrom; (b) a media pincher positioned between each pair of adjacent fingers in said pleat spacer; (i) each media pincher comprising a pair of beads forming an s-shaped media bite; said media pincher being constructed and arranged to provide for gripping of filter media when selectively positioned in contact with filter media.
Claim 15
Dependent Claim
104 words
A frame member for a filter assembly; said frame member comprising: (a) an elongate, extruded, extension having first and second, opposite, sides and first and second opposite edges; (i) said extension having first and second, opposite, side edge members, projecting outwardly from said first side of said frame member, to form a trough; and (ii) said frame member including a pair of longitudinal rails spaced a distance from said first and second opposite edges and positioned in projection outwardly from said second side of said frame member; each rail including a clamping surface secured within said frame member by an elongate, curved, spring extension.
Claim 16
Dependent Claim
104 words
A frame member for a filter assembly; said frame member comprising: (a) an elongate, extruded, extension having first and second, opposite, sides and first and second opposite edges; (i) said extension having first and second, opposite, side edge members, projecting outwardly from said first side of said frame member, to form a trough; and (ii) said frame member including a pair of longitudinal rails spaced a distance from said first and second opposite edges and positioned in projection outwardly from said second side of said frame member; each rail including a clamping surface secured within said frame member by an elongate, curved, spring extension.
Claim 17
Dependent Claim
25 words
A frame member according to claim 13 wherein: (a) said elongate, curved, spring extension has a radius within the range of 0.17 to 0.19 inch.
Claim 18
Dependent Claim
32 words
A frame member according to claim 14 wherein: (a) said clamping surface, of each rail, is spaced, nominallym from said second side a distance within the range of 0.020 to 0.040 inches.
Claim 19
Dependent Claim
32 words
A frame member according to claim 13 wherein: (a) said clamping surface, of each rail, is spaced, nominally, from said second side a distance within the range of 0.020 to 0.040 inches.
References Cited (Backward Citations)
US1899007A
Cited
US2058669A
Cited
US2081553A
Cited
US2135863A
Cited
US2415579A
Cited
US2915426A
Cited
US2945559A
Cited
US3138443A
Cited
US3168917A
Cited
US3216578A
Cited
US3222850A
Cited
US3292348A
Cited
US3438180A
Cited
US3486626A
Cited
US3494113A
Cited
US3606739A
Cited
US3695012A
Cited
US3823926A
Cited
US3712033A
Cited
US3747773A
Cited
US3869392A
Cited
US3778985A
Cited
US3793813A
Cited
US3793692A
Cited
US3789589A
Cited
US4056376A
Cited
US4042358A
Cited
CA1073826A
Cited
US4086071A
Cited
US4177050A
Cited
US4133661A
Cited
US4215079A
Cited
US4151095A
Cited
US4488966A
Cited
US4452619A
Cited
US4512891A
Cited
US4488888A
Cited
US4547950A
Cited
US4584005A
Cited
US4617122A
Cited
US4615804A
Cited
US4724749A
Cited
US4701196A
Cited
US4747341A
Cited
US4883513A
Cited
US4946484A
Cited
US4819549A
Cited
US5236480A
Cited
US4963171A
Cited
US5066400A
Cited
US5133789A
Cited
US5183488A
Cited
US5273563A
Cited
US5273564A
Cited
US5290345A
Cited
US5346519A
Cited
US5322117A
Cited
US5531892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-11-23 | 2002-05-25 | 2002-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-23 | 2006-05-25 | 2006-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-23 | 2010-05-25 | 2010-11-24 | $7700.00 | Window Closed / Lapsed |