US3812972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter and method for fabricating same
Assignee: Individual
•
Filing: 1972-05-02
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Granted: 1974-05-28
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Expires: 1992-05-02
Abstract
Abstract A liquid filter including at least two filter members having continuously contacting opposing surfaces, the members each being fabricated of a non-porous material, wherein at least a segment of a liquid flow path through the filter is defined at the interface of the contacting surfaces. A method of manufacturing the above filter comprising the steps of forming a groove in at least one of the opposing surfaces of the filter members and then mounting the filter members together in continuous superimposed contacting relation with the groove lying at the interface and defining at least a segment of a liquid flow path through the filter at said interface. In a preferred embodiment, the forming step includes chemical etching and the mounting step includes diffusion bonding.
Inventors
- 👤 J Rosenblum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:50
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/46; B01D25/00; B01D25/001
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
112 words
A filter for liquids comprising first and second nonporous substantially planar filter members having opposing sides in continuous surface to surface contact with one another, with an interface area defined between said sides, at least one of said sides including an elongated groove formed therein at said interface area, first filter member including a first hole therethrough in communication with the groove and the second filter member including a second hole therethrough in communication with the groove, the first hole being completely out of register with said second hole so that a tortuous liquid flow path is formed through the filter from said first hole through said groove to said second hole.
Claim 2
Dependent Claim
112 words
A filter for liquids comprising first and second nonporous substantially planar filter members having opposing sides in continuous surface to surface contact with one another, with an interface area defined between said sides, at least one of said sides including an elongated groove formed therein at said interface area, first filter member including a first hole therethrough in communication with the groove and the second filter member including a second hole therethrough in communication with the groove, the first hole being completely out of register with said second hole so that a tortuous liquid flow path is formed through the filter from said first hole through said groove to said second hole.
Claim 3
Dependent Claim
103 words
The filter of claim 1, wherein: a. the plates each include a multiplicity of holes therethrough which are arranged in the same spatial pattern on each plate with the holes in the first plate being completely out of register with the holes in the second plate; and b. a multiplicity of elongated grooves are defined in at least one of the contacting sides at said interface area, the grooves being arranged to provide liquid flow communication between the holes in the first plate and the holes in the second plate, a multiplicity of tortuous liquid flow paths thereby being defined through the filter.
Claim 4
Dependent Claim
26 words
The filter of claim 2, wherein each plate is fabricated of a noncorrosive material and wherein the plates are permanently bonded together at said opposing sides.
Claim 5
Dependent Claim
67 words
The filter of claim 1, wherein: a. the groove extends from the top surface of the first elongate bar to a terminal point above the bottom surface of said first elongate bar; and b. the second elongate bar includes a liquid flow path therethrough between an inlet end in communication with the groove at said terminal point and an outlet end communicating without said second elongate bar.
Claim 6
Dependent Claim
113 words
The filter of claim 4, wherein each elongate bar includes another side not in contact with the other elongate bar, and wherein the second elongate bar further comprises: a. an outlet groove formed in said other side of said second elongate bar and extending from the bottom surface of the second elongate bar to a junction point between the top and bottom surface of the second elongate bar; and b. an aperture formed through the second elongate bar and communicating between said terminal point of the groove in the first elongate bar and said junction point, said liquid flow path through the second elongate bar being defined by said aperture and outlet groove.
Claim 7
Dependent Claim
74 words
The filter of claim 4, wherein: a. the first elongate bar includes a plurality of grooves each extending between the top surface of said first elongate bar and a terminal point above the bottom surface of said first elongate bar; and b. the second elongate bar includes a plurality of liquid flow paths providing liquid flow communication through the second elongate bar between the grooves in said first elongate bar and the ambient environment.
Claim 8
Independent Claim
124 words
A method of fabricating a filter for liquids including first and second nonporous filter members having opposing sides in continuous surface to surface contact with one another with a liquid flow path defined at the interface of the fiLter members, the method comprising the steps of: a. forming a groove in at least one of said opposing sides so that said groove is out of communication with the edges of said filter members; b. mounting the members together with said opposing sides in continuous contact with one another at a location whereby said groove is defined at the interface; and c. providing said filter members with nonregistering holes which extend from the non-contacting surfaces of their respective filter members into communication with said groove.
Claim 9
Independent Claim
124 words
A method of fabricating a filter for liquids including first and second nonporous filter members having opposing sides in continuous surface to surface contact with one another with a liquid flow path defined at the interface of the fiLter members, the method comprising the steps of: a. forming a groove in at least one of said opposing sides so that said groove is out of communication with the edges of said filter members; b. mounting the members together with said opposing sides in continuous contact with one another at a location whereby said groove is defined at the interface; and c. providing said filter members with nonregistering holes which extend from the non-contacting surfaces of their respective filter members into communication with said groove.
Claim 10
Dependent Claim
21 words
The method of claim 7, wherein the forming step includes etching the groove into at least one of said opposing sides.
Claim 11
Dependent Claim
12 words
The method of claim 8, wherein the etching step includes chemical etching.
Claim 12
Dependent Claim
37 words
The method of claim 9, wherein the chemical etching step includes photochemical etching and wherein the mounting step includes diffuse bonding the members together with said opposing sides in continuous contact with one another at said location.
Claim 13
Dependent Claim
28 words
The method of claim 7, wherein the mounting step includes permanently bonding the members together with said opposing sides in continuous contact with one another at said location.
Claim 14
Dependent Claim
13 words
The method of claim 11, wherein the permanent bonding step includes diffusion bonding.
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |