Movable or removable closures – Frame with closure feature
Patent
1989-08-03
1991-11-12
Chilcot, Jr., Richard E.
Movable or removable closures
Frame with closure feature
52211, E06B 104
Patent
active
050637118
DESCRIPTION:
BRIEF SUMMARY
This invention relates to an improved sealable frame structure for closable openings such as a door and surrounding frame structure.
In buildings used to house laboratories or other "clean" work areas in the pharmaceutical, biotechnology and allied fields, it is essential that the area be kept sterile while allowing free access for personnel.
The aim of the present invention is to provide a door frame structure or other closable opening which is easy to install and provides a sterile seal for a door when closing the opening.
Accordingly, the present invention provides a sealable frame structure for a closable opening, in which the frame structure comprises a sub-frame adapted to be built into an opening in a wall and a frame shroud adapted to be fixed to the sub-frame, wherein the sub-frame is substantially U-shaped in cross-section comprising a web and two limbs extending from the web, the web of said U being arranged to be secured to the wall around the edges of said opening, in that wherein the frame shroud is fixed to the sub-frame by means of a strip of stainless steel or like material which is fixed to one limb of said U-shaped sub-frame, the other limb of the sub-frame being provided with a series of holes and the frame shroud being provided with a series of studs engageable in said holes, and wherein said frame shroud is provided with a sealing member to form a gas-tight seal for a closing member.
Preferably, the frame shroud forms a channel with the sub-frame to house electrical cables, electric interlocks and/or indicator lights.
The frame shroud is desirably secured to said strip of stainless steel or like material by a series of screws.
According to a preferred embodiment of the invention, the a profiled strip of resilient material fitted over an edge of said strip of stainless steel or like material.
In a preferred form, the closable opening is a doorway and the closing member is a door.
Conveniently, a silicone rubber seal extends across the threshold of the closable opening to produce a gas tight seal with the closing member.
In a preferred construction the door has toughened plate glass windows.
An embodiment of a sealable frame structure in the form of a door frame structure according to the invention will now be described in detail, by way of example, with reference to the drawings in which:
FIG. 1 is an elevation of one side of a sub-frame forming part of the door frame structure;
FIG. 2 is an elevation of the other side of the partially-assembled door frame structure to which a seal is to be fitted; and
FIG. 3 is a cross-section taken along the line III--III of FIG. 2 and fitted with a shroud and seal for the door frame structure.
Referring to the drawings, a sub-frame 1 of a door frame structure is built into a wall 20 during construction of the wall forming a plastering stop to ensure accurate plastering and finishing around the frame. The sub-frame is made of mild steel channel section and is secured to the wall through holes 2 by anchor fixings such as screws 21 (FIG. 3). Located down one of the sub-frame channel walls 3 are a series of holes 4 spaced at 300 mm intervals, while the other channel wall 5 has a further series of holes 6 spaced at 600 mm intervals.
The upper mitred corners of the sub-frame are welded internally to form a rigid right angled structure.
Once the sub-frame 1 has been installed in a wall opening in the wall 20, a strip 9 of stainless steel having a series of threaded studs 10 welded to it is secured to the sub-frame, the spacing of the studs 10 being such that each is aligned with a respective hole 6 whereby the studs project through the holes 6 and the strip 9 is secured in place by means of nuts 11 as shown in FIG. 3.
A frame shroud 7 made of shaped 2 mm thick stainless steel can then be fitted over the sub-frame 1. Welded to the shroud 7 are a number of studs 8 which on assembly of the two part frame structure are located in the holes 4. The free end of the strip 9 is secured to the free end of the shroud 7 by countersunk set screws 12, which pass through
REFERENCES:
patent: 1998791 (1935-04-01), Schanz
patent: 2113152 (1938-04-01), Johnston
patent: 2121826 (1935-06-01), Roberts
patent: 4658548 (1987-04-01), Gevvitsen
Brown Laurence R.
Chilcot Jr. Richard E.
Van Patten Michele A.
LandOfFree
Door frame structure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Door frame structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Door frame structure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1005395