Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3516469 A
Publication typeGrant
Publication dateJun 23, 1970
Filing dateJan 2, 1969
Priority dateJan 2, 1969
Publication numberUS 3516469 A, US 3516469A, US-A-3516469, US3516469 A, US3516469A
InventorsMcdonald Bruce D
Original AssigneeMcdonald Bruce D
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Power operated flexible wall section
US 3516469 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

June 23, 1970 B. L. MCDONALD POWER OPERATED FLEXIBLE WALL SECTION Filed Jan. 2, 1969 2 Sheets-Sheet 1 5y www fm. @We

TTO/Q/Vfy June 23, 1970 B. l.. MCDONALD POWER OPERATED FLEXIBLE WALL SECTION 2 Sheets-Sheet 2 Filed Jan. 2, 1969 TTO/Q/VEV United States Patent Oihce 3,516,469 POWER OPERATED FLEXIBLE WALL SECTION Bruce L. McDonald, 302 1st St., Jackson, Mich. 49203 Filed Jan. 2, 1969, Ser. No. 788,516 Int. Cl. E06b 9/08, 9/14 U.S. Cl. 160-26 2 Claims ABSTRACT OF THE DISCLOSURE This invention relates to doors, windows, partitions, blinds and the like, wherein it is desired to provide a closure member for any type of wall opening.

An object of the inveniton is to generally improve devices of the character indicated and to provide such a closure which is simple in construction, economical to manufacture and efficient in operation.

Another object of the invention is to provide a closure for a wall opening which has almost universal application, whereby the overall costs of the closure may be reduced, particularly the many expensive on-site costs which can be eliminated through mass production methods.

Another object of the invention is to provide a device of the character indicated which may be used as a movable partition, which may be erected and taken down with a minimum of effort and expense.

Another object of this invention is to provide a device of the character indicated which, because of its construction, greatly conserves space which must ordinarily be provided for hinged doors, and the like. This device also requires much less space for storage when it is not in use.

Another object of the invention is to provide a closure for a wall opening which is constructed in a manner to provide maximum sound and thermal insulation by having an air space trapped between spaced layers of material.

Another object of the invention is to provide a closure for a wall opening which makes it economically feasible to provide power operated doors, and the like, within the budget of the average home owner.

Anoter object of the invention is to reduce the weight and thickness of doors, partitions and the like, by employing tension in the layers of material, which provides rigidity and indestructibility to the structure, without the necessity of using stiff substances as plywood, and the like.

Another object of the invention is to provide builders and architects with an additional medium of expression, through the use of a great variety of colors, textures and materials for the exposed surfaces of the wall closure, such as a door or a partition.

The foregoing and other objects and advantages of the invention will become more apparent as the description proceeds, reference being made from time to time to the accompanying drawing, forming part of the w1th1n disclosure, in which drawing:

FIG. 1 is a perspective view of the device embodying the invention.

FIG. 2 is a vertical section, taken substantially on the line 2 2 of FIG. 1.

FIG. 3 is a vertical section, taken substantially on the 3,516,469 Patented June 23, 1970 line 3-3 of FIG. 1, with a power source shown in broken lines. This figure also shows an elevational view of one end of the closure member.

FIG. 4 is an enlarged, horizontal section taken substantially on the line 4 4 of FIG. 1.

FIG. 5 is a modification showing an exploded view of the device when used as a partition.

FIG. 6 is a compacted View of the device shown in FIG. 5, with a driving mechanism in place.

FIG. 7 is an enlarged, perspective view of a plurality of spacer elements strung together like beads on a pair of heavy cords. This figure also illustrates the driven elements which receive the driving sprockets.

FIG. 8 is an enlarged, end, elevational view of one of the spacers shown in FIG. 7, illustrating the manner in which it is received in the track, which is shown in cross section.

FIG. 9 is a perspective view illustrating the drive mechanism and the manner in which the tracks coil within the frame structure, which is partly shown in broken lines.

FIG. 10 is a diagrammatic view illustrating the manner in which the strung together spacers are received in the coiled track.

Referring now more particularly to the drawing, it will be understood that in the embodiment herein disclosed, the reference character 11 indicates, in general, the frame in which is housed the device embodying the invention. The frame 11 includes a base member 12, a top member 13, a side member 14, and a side member 15. The base member 12, and the top member 13, house and support laterally positioned track members 16, one of which is shown in section, in FIG. 8, which track members terminate, at one side of the frame, in spirals 17 and 18, (FIGS. 4 and 9). The spiral ends 17 and 18 of tracks 16 are housed in a frame member 19, as shown in FIG. 4. The frame member 19 also encases the drive shaft 20, which moves the closure member, as hereinafter described. The drive shaft 20 is driven by a suitable motor 21, which may be located within the frame member 19, as conditions dictate. The drive shaft 20 is provided, at either end, with suitable bearings 22. The drive shaft 20 has mounted for rotation therewith, upper and lower sprockets 23 and 24, which are housed in the upper and lower frame members 13 and 12, and are arranged to move the closure member, which is generally indicated by the reference character 25.

The closure member 25 is constructed of a plurality of spacers 26 (FIGS. 7 and 8) Awhich are strung together, like beads, on the heavy cords 27, which may be made of nylon or other suitable material. The spacers 26 are preferably made of a plastic material also, so that they will withstand moisture, heat, etc. The spacers 26 are preferably made of hexagonal (in cross section) stock (FIGS. 4 and 10) so that there are three faces on each side, to which faces is cemented the material layers 28, 29 (FIGS. 2 and 4) to form the enclosure 25. The spacers 26 extend inwardly from the upper and lower edges of the material layers 28-29, a predetermined distance, except at the extreme ends of the closure 25 where the spacers 26A and 26B extend from the upper edge to the lower edge of the closure 25. The material is cemented onto the faces of the spacers 26 so that there is an insulating dead air space Ibetween the layers 28-29 throughout a substantial portion of their area. Although I have shown only one thickness to each layer 28-29, it will be understood that a multiple thickness may be employed, if desired, to give more strength to the closure 25.

As shown in FIG. 8, each spacer 26 is formed with a recess 30 to receive the flange 31 of the track 16, and with a set back 32 to receive the ange 33 of the track. Each spacer is also formed with a recess 34 (FIG. 7) for receiving the teeth of the drive sprockets 23-24, so that upon rotation of the shaft 20, in either direction, by the reversible motor 21, the closure 25 will move longitudinally. When the closure 25 moves to the left in FIG. 1 and 4, to open the door, it will coil on the coiled track sections 17 and 18. When it is moved to the right, the end spacer 26B Will be received snugly in the offset 35 of the member 14 to close the opening. The tracks 16, 17, 18 at top and bottom maintain tension at all times on the layers of material, yet the closure is flexible enough to negotiate the coils.

It is believed that the operation of the device is obvious from the foregoing description.

Having described my invention, what I claim and desire to secure by Letters Patent is:

1. A closure for a Wall opening comprising a frame, channel like tracks supported by said frame, each of said tracks terminating at one end in a coil, and a exible closure -member supported by said tracks and frame and slideable therein, said exible closure member consisting of a plurality of rigid spacers having their ends received in said tracks and having elements thereon arranged to engage the teeth of power driven sprockets, said spacers having bores through which is strung at least one heavy cord, there being at least one layer of eXible material secured to front and back of said spacers to form a dead air space between said layers, each of said tracks having means thereon for exerting lateral and longitudinal tension on said flexible closure member.

2. The structure of claim 1 in which said tracks and said spacers cooperatae to develop longitudinal and lateral tension in said flexible closure member.

References Cited 641,3101 `6/1962 Italy.

J. KARL BELL, Primary Examiner U.S. Cl. X.R. -36, 133

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2173900 *Jun 25, 1938Sep 26, 1939Otis Elevator CoOperating mechanism for closures for moving stairway wellway openings
US2188509 *May 14, 1938Jan 30, 1940Cornell Iron Works IncEscalator cover
US2248538 *Aug 26, 1940Jul 8, 1941George LieblerCollapsible automobile roof
US2726911 *Jun 18, 1954Dec 13, 1955Mason Samuel JRoll top extension table
US2934139 *Jun 5, 1957Apr 26, 1960Cookson CompanySide coiling articulated partition and drive mechanism therefor
FR1275812A * Title not available
IT641310B * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4889381 *Mar 25, 1988Dec 26, 1989American & Overseas CorporationRetractable truck bed cover apparatus
US4947937 *Mar 24, 1989Aug 14, 1990Fas Industries, Inc.Spring-operated tambour apparatus
US5484007 *Nov 10, 1992Jan 16, 1996Rejc; GabrijelVertical lift gate with strip cladding in guideways
US5488982 *Nov 10, 1992Feb 6, 1996Efaflex Transport Und Lagertechnik GmbhLifting door with a slatted armor having articulated slats
US5584333 *Apr 21, 1995Dec 17, 1996Super Seal Mfg. Ltd.Releasable panel for overhead door
US5722476 *Apr 3, 1996Mar 3, 1998Ceraper S.L.Reversible slatted shutter
US6119758 *Apr 20, 1995Sep 19, 2000Dynaco InternationalClosure device with a flexible screen
US6296039 *Mar 8, 2000Oct 2, 2001Wayne-Dalton CorporationApparatus and method for windlocking a building opening
US6305456 *Jun 25, 1999Oct 23, 2001Ceraper S.L.Operating devices and slats for reversible window blinds
US6341639Aug 23, 2000Jan 29, 2002Wayne-Dalton CorporationApparatus and method for windlocking a building opening
US6431250May 9, 2001Aug 13, 2002Wayne-Dalton CorporationApparatus and method for windlocking a building opening
US6848734 *May 23, 2003Feb 1, 2005Tim MulvaneySealing mechanism for truck box cover device
US7695230 *Feb 5, 2004Apr 13, 2010Gea Lyophil GmbhApparatus for loading and unloading freeze-drying chambers
US7748431Jan 25, 2007Jul 6, 2010Rite-Hite Holding CorporationTrack and guide system for a door
US7766152 *Jun 6, 2005Aug 3, 2010Ima Life S.R.L.Freeze dryer
US8037921Jun 5, 2006Oct 18, 2011Rite-Hite Holding CorporationTrack and guide system for a door
US8857498Jul 23, 2010Oct 14, 2014Rite-Hite Holding CorporationTrack and guide system for a door
US8863815Apr 28, 2010Oct 21, 2014Rite-Hite Holding CorporationTrack and guide system for a door
US20050115688 *Jan 11, 2005Jun 2, 2005Friedhelm FredeRollup door with rollable door leaf
US20060263179 *Feb 5, 2004Nov 23, 2006Johannes SelchApparatus having a supporting surface
US20070277941 *Jan 25, 2007Dec 6, 2007Rite-Hite Holding CorporationTrack and guide system for a door
US20070277942 *Jun 5, 2006Dec 6, 2007Jason DondlingerTrack and guide system for a door
US20070277943 *Sep 13, 2006Dec 6, 2007Rite-Hite Holding CorporationTrack and guide system for a door
US20080134537 *Jun 6, 2005Jun 12, 2008Franciscus DamenFreeze Dryer
US20100263286 *Apr 28, 2010Oct 21, 2010Tom JansenTrack and guide system for a door
US20110067307 *Jul 23, 2010Mar 24, 2011Jason DondlingerTrack and guide system for a door
US20150364065 *Dec 12, 2013Dec 17, 2015Boe Technology Group Co., Ltd.Flexible display device
WO1988007122A1 *Mar 20, 1987Sep 22, 1988Crawford Door Production AbArrangement for a door
WO1988007618A1 *Mar 23, 1988Oct 6, 1988Efaflex Transport- Und Lagertechnik GmbhGate, in particular a motor-driven industrial gate
WO1990002056A1 *Aug 31, 1989Mar 8, 1990Romano Frank SCover assembly with spiral storage grooves
WO1995030064A1 *Apr 20, 1995Nov 9, 1995Dynaco InternationalClosure device with a flexible screen
U.S. Classification160/26, 160/133, 160/36
International ClassificationE06B9/08
Cooperative ClassificationE06B9/08
European ClassificationE06B9/08