US3645401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter changing device
Assignee: INTERLOOM INTERNATIONAL Inc
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Filing: 1970-03-06
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Granted: 1972-02-29
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Expires: 1990-03-06
Abstract
Abstract A filter changing device comprising a rotatory structure having first and second passage means therethrough in nonparallel, nonintersecting relationship, each of the passage means being adapted releasably to hold a filter, and means for supporting the rotatory structure for rotation about an axis from a first position in which the respective ends of the first passage means are at predetermined points to a second position in which the respective ends of the second passage means instead of the first passage means are located at the same predetermined points.
Inventors
- 👤 John S Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:42
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/05; B01D29/50; B01D29/96; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/69; B29C48/691; B29C48/6914; B29B; B29B7/00; B29B7/30; B29B7/58; B29C48/03; B29C48/05; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
212 words
A filter changing device comprising means defining a rotatory structure having passage means therethrough, means supporting said rotatory structure and permitting rotation of said rotatory structure about a fixed axis, a first of said passage means having entry and exit ports axially aligned on a first line perpendicular to said axis, a second of said passage means having entry and exit ports axially aligned on a second line perpendicular to said axis, said second line lying in the same plane as the first line and being rotationally displaced about said axis from said first line, said first and second passage means not intersecting with each other, one of the ports of each of said first and second passage means being adapted releasably to hold a filter, said means for supporting said rotatory structure having an entry port and an exit port axially aligned on a line intersecting said axis and lying in said plane, said rotatory structure thus being adapted to be rotated in said supporting means about said axis from a first position in which the ports of said first passage means communicate with the ports of the support means to a second position in which the ports of said second passage means communicate with the ports of the support means.
Claim 2
Dependent Claim
212 words
A filter changing device comprising means defining a rotatory structure having passage means therethrough, means supporting said rotatory structure and permitting rotation of said rotatory structure about a fixed axis, a first of said passage means having entry and exit ports axially aligned on a first line perpendicular to said axis, a second of said passage means having entry and exit ports axially aligned on a second line perpendicular to said axis, said second line lying in the same plane as the first line and being rotationally displaced about said axis from said first line, said first and second passage means not intersecting with each other, one of the ports of each of said first and second passage means being adapted releasably to hold a filter, said means for supporting said rotatory structure having an entry port and an exit port axially aligned on a line intersecting said axis and lying in said plane, said rotatory structure thus being adapted to be rotated in said supporting means about said axis from a first position in which the ports of said first passage means communicate with the ports of the support means to a second position in which the ports of said second passage means communicate with the ports of the support means.
Claim 3
Dependent Claim
66 words
A filter changing device according to claim 1, in which the ports of each of said passage means are of greater diameter than a portion of the passage means intermediate the ports, the intermediate portion of the first of said passage means lying in planes perpendicular to said axis completely outside planes perpendicular to said axis in which planes the second of said passage means lies.
Claim 4
Dependent Claim
37 words
A filter changing device according to claim 2, in which the intermediate portion of each of said passage means comprises two passages the axes of which are equidistantly spaced from the axis of the respective passage means.
Claim 5
Dependent Claim
58 words
A filter changing device according to claim 2, in which the two passages of one of the passage means are spaced from each other in a direction parallel to the axis of rotation and the two passages of the other of the passage means are spaced from each other in a direction perpendicular to the axis of rotation.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |