Flexible or portable closure – partition – or panel – Plural and/or with rigid closure – Roll type
Reexamination Certificate
2007-05-04
2010-11-09
Johnson, Blair M. (Department: 3634)
Flexible or portable closure, partition, or panel
Plural and/or with rigid closure
Roll type
C160S085000, C160S368100
Reexamination Certificate
active
07828037
ABSTRACT:
An apparatus for opening and closing a portal in a structure in which a curtain having elongated side portions is placed adjacent opposing sides of the portal. A first end of the curtain is attached to a first end of the portal. An opposite end of the curtain is upturned and attached to a varying means at the first end of the portal to vary the height of a pocket formed in the curtain. Magnetic sealing means are placed on the elongated side portions of the curtain and on the opposing sides of the portal. The portal is closed as the varying means lowers the height of the pocket, wherein the magnetic sealing means on the curtain engage the magnetic sealing means on the opposing sides of the portal, thereby sealing the portal. The portal is opened as the varying means raises the height of the pocket, wherein the magnetic sealing means on the curtain disengage the magnetic sealing means on the opposing sides of the portal, thereby unsealing the portal.
REFERENCES:
patent: 3789904 (1974-02-01), Takazawa
patent: 4344474 (1982-08-01), Berman
patent: 4418739 (1983-12-01), Woolnough et al.
patent: 4436137 (1984-03-01), Charles
patent: 4453584 (1984-06-01), Steele
patent: 4825921 (1989-05-01), Rigter
patent: 5195594 (1993-03-01), Allen et al.
patent: 5566736 (1996-10-01), Crider et al.
patent: 5785105 (1998-07-01), Crider et al.
patent: 5960847 (1999-10-01), Crider et al.
patent: 6138739 (2000-10-01), Crider et al.
patent: 6189592 (2001-02-01), Domel
patent: 6309076 (2001-10-01), McVicker
patent: 6901987 (2005-06-01), Graham
patent: 6942001 (2005-09-01), Crider et al.
Bush Kenneth M.
Bush Intellectual Property Law
Johnson Blair M.
Walsh Gerald M.
LandOfFree
Portal covering for controlled environments does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portal covering for controlled environments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portal covering for controlled environments will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4181419