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.

Patents

  1. Advanced Patent Search
Publication numberUS1707287 A
Publication typeGrant
Publication dateApr 2, 1929
Filing dateAug 30, 1926
Priority dateAug 30, 1926
Publication numberUS 1707287 A, US 1707287A, US-A-1707287, US1707287 A, US1707287A
InventorsTomitaro Sudzki
Original AssigneeTomitaro Sudzki
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fireproof shutter
US 1707287 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

April ,2, 1929. D 1,707,287

FIREPROOF SHUTTER Filed Aug. 30, 1926 fill Patented Apr. 2, 1929.

UNITED STATES TOMITARO SUDZKI, OF TOKYO-EU, JAPAN.

FIREPROOF SHUTTER.

Application filed August 30, 1926. Serial No. 132,598.

of Fig. 1. Ii shown in the drawing, each slat consis of outer and inner plates hav space left between them. The outer plate has its upper and lower edges 3, bent so as to form a channel at almost a right angle with the curved surface, edges gradually approaching each other. The ends of these edges are curled to make interlocking flanges as in The in nor plate bent to form a channel which tightly fits into the bent portions (3) (4) of the outer plate, the upper and lower edges 7, 8 being bent at almost a right angle with the curved surface, the distance between them gradually diverging.

As stated above, the outer plate (1) being in a shape of trapezoidal channel spreading at the bottom, and the inner plate also in the sonic shape but narrowing at the botton'i, they will be tightly .inti-zrloch'ed with each other and iiorrn a hollow slat it the latter is slipped into the former from its one end and then the bent portions oi the outer plate are pressed on the bent portions 7) (8) of the inner plate. Thus, the inner plate does not separate from the outer i" it i 1 Y reg plate, even it not connected to the latter by riveting or like means. However, in this shutterlike an ordinary one, it is necessary to attach an end lock or shield to both ends to prevent lateral movement of each slat, so that it is advisable to ensure the connection of the outer and inner plates still more terlocking joint. Its body (10) is provided with a tubular projection (11), the height of which is made equal to the width of space between the slats, namely a space between the outer and inner plates. The rivet (12) that passes through the said projection to connect the said. end. lock with the slats is used also for connecting the two plates. The outer surface of the end lock is made convex at as (13) to enable the slats to move up and down smoothly along rails. The air space between the outer and inner plates is intended for the prevention of heat ef- .iectively, and this space may sometimes be filled with heat insulating materials. The shutter of my invention is very effective against fire and can be rolled up around a shaft without dilliculty. Besides, it can be 1nanulactured easily. An ordinary slat consists oil a surface carving gradually between upper and lower interlocking flanges, while in this invention these flanges being bent at almost the right angle with the curved surface as in (S) (4:), the slat is more rigid.

Claims:

1. A fire-proof shutter consisting of slats jointed together, each slat comprising outer and inner plates having space left between them, both plates being bent obliquely at the upper and lower edges to form a channel having widened bottom and a channel having widened top respectively .and interlocked with iaeh other, both plates having air space between them, the edges of the ohter plate being extended laterally and curved whereby to be jointed to the correspondingly shaped edge oli an adjacent slat of the shutter.

2. A fire-proof shutter consisting of slats jointed together, each slat comprising outer and inner plates having space left between them, both plates being bent obliquely at the upper and lower edges to form a channel having widened bottom and a channel having widened top respectively and interlocked with each other, the edges of the outer plate being extended laterally and curved whereby to be jointed to the correspondingly shaped edge of an adjacent slat of the shutter. V

In testimony whereof I have affixed my signature. TOMITARO SUDZKI.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2902087 *May 13, 1957Sep 1, 1959Overhead Door CorpHinges and track engaging roller supports for slidable closures
US2958083 *Sep 19, 1955Nov 1, 1960NemoedeSwimming pool safety device
US3148724 *Dec 31, 1962Sep 15, 1964Fruehauf CorpRoll-up door
US4343340 *Jul 28, 1980Aug 10, 1982Prime Marketing Group, Inc.Shutter slat configuration
US4365660 *May 13, 1981Dec 28, 1982Johann HenkenjohannRoller blind
US5253694 *Nov 27, 1991Oct 19, 1993Bernardo Richard GRolling shutter slat end retainer
US8567591Jul 16, 2012Oct 29, 2013Thyssenkrupp Elevator Innovation Center, S.A.Longitudinal joint
DE1509271B1 *Dec 10, 1964Oct 23, 1969Dover Roller Shutters LtdRolladen aus scharnierartig ineinandergreifenden Leisten mit Fuehrungsbloecken an den Enden jeder zweiten Leiste
EP2177469A1 *Oct 16, 2009Apr 21, 2010Thyssenkrupp Elevator Innovation Center, S.A.Transverse longitudinal joint
EP2548833A1Jun 25, 2012Jan 23, 2013ThyssenKrupp Elevator Innovation Center S.A.Longitudinal joint
Classifications
U.S. Classification160/232, 160/235
International ClassificationE06B9/15, E06B9/17
Cooperative ClassificationE06B2009/1583, E06B2009/1594, E06B9/15, E06B2009/1572
European ClassificationE06B9/15