Patent US3856489A successfully refreshed from Google Patents.
US3856489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder for annular filter
Assignee: Evo Corp
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Filing: 1973-06-22
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Granted: 1974-12-24
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Expires: 1993-06-22
Abstract
Abstract A holder for an annular filter including a support body, a sealing annulus and a core cap. The support body has a conical section at one end and the sealing annulus has a conical section for mating with the conical section of the support body and clamping the filter between the conical sections to form a continuous seal with the annular filter. The core cap engages the sealing annulus and draws the conical section of the sealing annulus toward the conical section of the support body.
Inventors
- 👤 E Vokral
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:32
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/06; Y; Y10; Y10S; Y10S55/00; Y10S55/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
A filter holder unit comprising: an annular filter having an open end; body means for supporting the annular filter, said body means having a first conical section at one end thereof for receiving the open end of the annular filter; a sealing annulus having a second conical section for sealing the open end of the annular filter to the first conical section of said body means; a core cap including means for drawing the second conical section of said sealing annulus toward the first conical section of said body means in such manner as to clamp the annular filter between said first and second conical sections and form a continuous seal around the open end of the annular filter; and wherein the first conical section of said body means has a sealing lip for engaging said core cap and forming a seal therewith.
Claim 2
Dependent Claim
143 words
A filter holder unit comprising: an annular filter having an open end; body means for supporting the annular filter, said body means having a first conical section at one end thereof for receiving the open end of the annular filter; a sealing annulus having a second conical section for sealing the open end of the annular filter to the first conical section of said body means; a core cap including means for drawing the second conical section of said sealing annulus toward the first conical section of said body means in such manner as to clamp the annular filter between said first and second conical sections and form a continuous seal around the open end of the annular filter; and wherein the first conical section of said body means has a sealing lip for engaging said core cap and forming a seal therewith.
Claim 3
Dependent Claim
143 words
A filter holder unit comprising: an annular filter having an open end; body means for supporting the annular filter, said body means having a first conical section at one end thereof for receiving the open end of the annular filter; a sealing annulus having a second conical section for sealing the open end of the annular filter to the first conical section of said body means; a core cap including means for drawing the second conical section of said sealing annulus toward the first conical section of said body means in such manner as to clamp the annular filter between said first and second conical sections and form a continuous seal around the open end of the annular filter; and wherein the first conical section of said body means has a sealing lip for engaging said core cap and forming a seal therewith.
Claim 4
Dependent Claim
143 words
A filter holder unit comprising: an annular filter having an open end; body means for supporting the annular filter, said body means having a first conical section at one end thereof for receiving the open end of the annular filter; a sealing annulus having a second conical section for sealing the open end of the annular filter to the first conical section of said body means; a core cap including means for drawing the second conical section of said sealing annulus toward the first conical section of said body means in such manner as to clamp the annular filter between said first and second conical sections and form a continuous seal around the open end of the annular filter; and wherein the first conical section of said body means has a sealing lip for engaging said core cap and forming a seal therewith.
Claim 5
Dependent Claim
16 words
The unit of claim 1 wherein said core cap has a threaded neck extending upwardly therefrom.
Claim 6
Dependent Claim
18 words
The unit of claim 2 wherein said core cap has an annular groove for retaining a sealing ring.
Claim 7
Dependent Claim
37 words
The unit of claim 1 wherein the angle of divergence of the first conical section of said body means and the angle of divergence of the second conical section of said sealing annulus are substantially the same.
Claim 8
Dependent Claim
38 words
The unit of claim 4 wherein said sealing annulus includes a first threaded portion and the drawing means of said core cap includes a second threaded portion for mating with the first threaded portion of said sealing annulus.
Claim 9
Dependent Claim
32 words
The unit of claim 5 wherein said body means includes a filter support cage, said first conical section of said body means being positioned at one end of said filter support cage.
Claim 10
Dependent Claim
27 words
The unit of claim 1 wherein the second conical section of said sealing annulus is concentric with and surrounds the first conical section of said body means.
Claim 11
Dependent Claim
34 words
The unit of claim 8 wherein said sealing annulus has a first threaded portion and said drawing means has a second threaded portion for mating with the first threaded portion of said sealing annulus.
Claim 12
Dependent Claim
37 words
The unit of claim 9 wherein the angle of divergence of the first conical section of said body means and the angle of divergence of the second conical section of said sealing annulus is substantially the same.
Claim 13
Dependent Claim
27 words
The unit of claim 8 wherein the second conical section of said sealing annulus is concentric with and surrounds the first conical section of said body means.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |