Patent US4767531A successfully refreshed from Google Patents.
US4767531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retractor for permeator or filter module
Assignee: Eastman Technology Inc
•
Filing: 1987-11-02
•
Granted: 1988-08-30
•
Expires: 2007-11-02
Abstract
Abstract A retractor handle is attached to the retraction end of a core wound permeator or filter module for withdrawing the module form its containment housing without requiring special tools. The retraction handle can be a resin pull ring flexibly attached to a flange of a plug that closes the retraction end of the core of the permeator or filter module. The retraction handle can also be a wire pull ring having ends seated in sockets formed in a plugged end region of the core.
Inventors
- 👤 Joseph C. Holzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:12
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; B01D65/00; B01D2313/00; B01D2313/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
In a permeator module of the type adapted to be mounted within a filtration-system housing and of the type having a membrane wound on a core having an open-end region, a plug-retractor device comprising: (a) a plug having a body tightly fitted within said open-end region of said core to secure it to said core sufficient to withstand the force required to remove the module from said housing; and (b) a retraction handle formed as a ring integrally attached to a head of said plug, the arrangement being such that, when sufficient force is applied to said handle, said module is removed from said housing.
Claim 2
Dependent Claim
105 words
In a permeator module of the type adapted to be mounted within a filtration-system housing and of the type having a membrane wound on a core having an open-end region, a plug-retractor device comprising: (a) a plug having a body tightly fitted within said open-end region of said core to secure it to said core sufficient to withstand the force required to remove the module from said housing; and (b) a retraction handle formed as a ring integrally attached to a head of said plug, the arrangement being such that, when sufficient force is applied to said handle, said module is removed from said housing.
Claim 3
Dependent Claim
18 words
The retractor of claim 1 wherein said body, head, and ring are molded of a flexible resin material.
Claim 4
Dependent Claim
45 words
The retractor of claim 2 wherein the force holding said body within said core is larger than the force applied to said body by pulling on said flexible ring, which in turn is larger than a force tending to hold said module within said housing.
Claim 5
Dependent Claim
23 words
The retractor of claim 1 wherein said body has a socket for receiving an end region of a tube arranged within said core.
Claim 6
Dependent Claim
16 words
The retractor of claim 4 wherein said head has a through opening communicating with said socket.
Claim 7
Dependent Claim
78 words
The retractor of claim 1 wherein the attachment of said ring and said head occurs in a region spaced between said core and said housing around said module, and said ring extends radially from said attachment region to the region of said housing around said module and is fixed to said plug and has a portion which engages the housing so as to serve as a fulcrum for leveraging the initial withdrawal of said module from said housing.
References Cited (Backward Citations)
US2642187A
Cited
US2731155A
Cited
US2822201A
Cited
DE947841C
Cited
US3189179A
Cited
US3542203A
Cited
US3504796A
Cited
US3568843A
Cited
DE1932585A1
Cited
US3883430A
Cited
US4016083A
Cited
US4110219A
Cited
GB2004472A
Cited
US4301013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |