Patent US3583567A successfully refreshed from Google Patents.
US3583567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent filter particularly designed for drycleaning plants
Assignee: Individual
•
Filing: 1969-08-01
•
Granted: 1971-06-08
•
Expires: 1989-08-01
Abstract
Abstract A solvent filter particularly designed for drycleaning plants, comprising a filtering assembly consisting of a plurality of elongated filtering elements supported by, radially extending from and evenly spaced about a shaft rotatably supported within a stationary casing coaxial to said assembly and provided with inwardly protruding ridges adapted for promoting a turbulent motion of the liquid in the spaces confined between adjacent filtering elements when said assembly is rotated within said casing, whereby the liquid is caused to lap the surface of said element and sweep the exhausted filtering powder and dirt thereof.
Inventors
- 👤 Gino Maestrelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:17
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/62; B01D29/70; B01D29/74; B01D29/44; B01D29/48; B01D29/50; B01D29/52; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0453
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
162 words
A solvent filter comprising a casing having lateral wall means and a vertical axis enclosing an elongated cylindrical space, a filter assembly supported for rotation about said axis comprising a shaft at said axis, drive means outside said casing to be rotated for filter cleansing, a plurality of elongated filtering elements having filtering surfaces and mounted about said shaft for rotation therewith and arranged in evenly spaced planes radial to said shaft, inlet duct means connected to said casing and outlet duct means for circulating the solvent through said filtering surfaces for solvent filtering, and drain duct means at the bottom of said casing for exhausting the muddy liquid resulting from filter cleansing, wherein the improvement comprises liquid rotation discontinuing abutting means inwardly protruding from the inner face of the lateral wall means in a space outside said cylindrical space and positioned to promote liquid vortices in said space and between said filtering elements as said assembly is rotated for filter cleansing.
Claim 2
Dependent Claim
162 words
A solvent filter comprising a casing having lateral wall means and a vertical axis enclosing an elongated cylindrical space, a filter assembly supported for rotation about said axis comprising a shaft at said axis, drive means outside said casing to be rotated for filter cleansing, a plurality of elongated filtering elements having filtering surfaces and mounted about said shaft for rotation therewith and arranged in evenly spaced planes radial to said shaft, inlet duct means connected to said casing and outlet duct means for circulating the solvent through said filtering surfaces for solvent filtering, and drain duct means at the bottom of said casing for exhausting the muddy liquid resulting from filter cleansing, wherein the improvement comprises liquid rotation discontinuing abutting means inwardly protruding from the inner face of the lateral wall means in a space outside said cylindrical space and positioned to promote liquid vortices in said space and between said filtering elements as said assembly is rotated for filter cleansing.
Claim 3
Dependent Claim
64 words
A filter as set forth in claim 1, wherein said casing has cylindrical lateral wall means and said abutting means consist of a plurality of baffles forming ridges evenly spaced about and inwardly protruding from the cylindrical inner face of said wall means. 3. A filter as set forth in claim 2, wherein said ridges are arranged parallel to the axis of said casing.
Claim 4
Dependent Claim
22 words
A filter as set forth in claim 2, wherein the said ridges are helically arranged respectively to the axis of said casing.
Claim 5
Dependent Claim
23 words
A filter as set forth in claim 2, wherein the said ridges consist of inwardly bent portions of the said lateral wall means.
Claim 6
Dependent Claim
46 words
A filter as set forth in claim 2, wherein the said ridges are positioned to form a slant directed in counterflow relatively to the direction of the rotational motion of the liquid in said casing, as promoted by the rotation of said assembly within said casing.
Claim 7
Dependent Claim
35 words
A filter as set forth in claim 1, wherein said casing has a noncircular configuration in planes perpendicular to its axis and said noncircular configuration includes sharp dihedral angles facing towards said elongated cylindrical space.
Claim 8
Dependent Claim
40 words
A filter as set forth in claim 7, wherein said casing is of square cross-sectional configuration in planes perpendicular to said axis and dimensiOned to confine at little clearance said elongated cylindrical space between its planar opposite lateral wall portions.
References Cited (Backward Citations)
US2822926A
Cited
US3491887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |