US3878879A - Roll-up door - Google Patents

Roll-up door Download PDF

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Publication number
US3878879A
US3878879A US38821173A US3878879A US 3878879 A US3878879 A US 3878879A US 38821173 A US38821173 A US 38821173A US 3878879 A US3878879 A US 3878879A
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Prior art keywords
door
up
roll
leaf
pulleys
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Expired - Lifetime
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Bernt Hugo Manns
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NOMAFA BOX 509M S-301 80 HALMSTAD SWEDEN A CORP OF SWEDEN ` AB
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Nordiska Maskinfilt AB
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    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/58Guiding devices
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06BFIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/62Counterweighting arrangements

Abstract

In a roll-up door having a flexible door-leaf arranged to be wound about a roller for closing and opening the door, means for maintaining said door-leaf in a stretched condition laterally, said means including trolleys running in guide rails provided in vertical side frames, and means for maintaining said door-leaf in a stretched condition vertically, said means including a movable pulley loaded by a weight, said weight being divided into two opposing load components by a wire running from the trolley around two stationary pulleys and over said loaded movable pulley to a winding drum supported on the shaft of said roll-up roller.

Description

United States Patent [1 1 Manns Apr. 22, 1975 1 ROLL-UP DOOR [75] Inventor: Bernt Hugo Manns, Halmstad.

Sweden [22] Filed: Aug. 14, 1973 [21] Appl. No.: 388,211

[30] Foreign Application Priority Data Aug. 18, 1972 Sweden 10759/72 [52] US. Cl. 160/273; 160/23; 160/133; 160/285 [51] Int. Cl E06b 9/08 [58] Field of Search 160/23-26, 160/133, 238, 266-273, 284-287 [56] References Cited UNlTED STATES PATENTS 472.832 4/1892 Sweeney 160/285 1,088,139 2/1914 Fischer 160/273 2,839,135 6/1958 Anderson 160/133 3.050.743 8/1962 Lamb 160/271 X Primary Examiner-.1. Karl Bell [5 7 ABSTRACT In a roll-up door having a flexible door-leaf arranged to be wound about a roller for closing and opening the door, means for maintaining said door-leaf in a stretched condition laterally, said means including trolleys running in guide rails provided in vertical side frames, and means for maintaining said door-leaf in a stretched condition vertically, said means including a movable pulley loaded by a weight, said weight being divided into two opposing load components by a wire running from the trolley around two stationary pulleys and over said loaded movable pulley to a winding drum supported on the shaft of said roll-up roller.

4 Claims, 3 Drawing Figures ROLL-UP DOOR BACKGROUND OF THE INVENTION To avoid disturbances such as air currents. noise. etc. :between two premises, e.g. factory halls. or between an indoor room and an outdoor room, it is necessary that the interconnecting opening is blocked off by a door or gate. The doors available on the market are manufactured in the shape of a. continuous, rigid door-panels.

b. divided, rigid doorpanels. the divisions being hingedly interconnected,

c. door-panels consisting of steel lamellae. and

d. doors made from aluminium profiles arranged to be telescopically nested in one another.

A feature common to all types of doors mentioned above is that in open condition they are collected above the door opening and several of them require considerable headroom space vertically or in plane above the opening. The speed of opening up the doors is for all the door types mentioned very low and in consequence thereof considerable hold-up time is required for internal transports, particularly in case double doors are used including an air lock where one door has to be shut before the second one opens.

SUMMARY OF THE INVENTION The roll-up door in accordance with the present invention is of the type where the door-leaf is flexible and arranged to be wound about a roller into open position. It is characterised in that the door-leaf is maintained in a stretched condition laterally by means of trolleys having preferably grooved wheels running in contact with guide rails provided in vertical side frames. The opening and closing movements of the door in accordance with the invention may be performed rapidly. the door is noiseless and the space required to accommodate the door-leaf in open positions minimal. In accordance with one embodiment of the invention the weight of the door-leaf may be completely balanced. making it possible to easily operate the door manually. should this be required.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described more in detail in the following with reference to the accompanying drawings wherein.

FIG. 1 is a front view of a roll-up door in accordance with the invention. the door being in a semi-open positlon.

FIG. 2 is a sideview of the door, and

FIG. 3 is a horizontal section along line III-III of FIG. 1.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT These trolleys maintain the door'leaf l in a stretched condition in the lateral direction. To each trolley 3 is attached one end of a wire 7. Each wire 7 runs around stationary pulleys 8 and 9 and over a movable pulley ll loaded by a weight 10. The opposite end of each wire 7 is attached to a winding drum 12 which is rigidly secured to the same shaft as in the roll-up roller 2 and onto which the respective one of the wires 7 is wound.

The wires 7 are wound off and on its respective winding drum 12 in the opposite direction to the unwinding and rolling-on of the door-leaf 1 onto and off the rollup roller 2 which means that when the door-leaf l is wound off (the door closes), the wires 7 will be wound on, and the reverse for opening the door. On account of the heaviness of the weight 10, the wires 7 will exert a downwards pulling effect on the trolleys 3 and in doing so will maintain the door-leaf in a stretched condition in the vertical direction. The weight of the trolleys 3 and that of the door-leaf 1 may be balanced through a suitable choice of diameter relations between the roller 2 and the winding drum 12. This balancing may be carried out in such a manner that the door, when released. may be brought to a standstill in the position desired.

The door is driven in the conventional manner by means ofa motor 13 which is coupled to the roll-up roller 2. The operation may be effected electrically from a position which is convenient for instance for the truck drivers, and may be effected either manually or automatically with the aid of eg photoelectric cells. Owing to the balancing a rather small power is required for the motor 13 to effect the closing and opening movements.

What I claim is:

I. An improved roll-up door including a flexible door-leaf. a roller onto which said door is wound. first and second vertical side frames, guide means supported by said side frames for guiding said door during vertical movement. trolleys in said frames for maintaining said door in stretched condition laterally. the improvement comprising first and second pulleys. arranged in said vertical side frames respectively. first and second weights respectively secured to said pulleys for maintaining said flexible door in stretched condition in the vertical direction and simultaneously balancing said door. a groove in each of said pulleys. first and second ropes running in said respective grooves in each of said pulleys. first and second winding drums respectively at the ends of said roll-up roller, and first andsecond stationary pulleys in said frames, each of said ropes arranged to divide said respective weight into two opposing load components. one through the connection of one of the rope ends to said respective winding drum and the other one through the connection of the re- 7 maining rope end to said trolley via said first and second stationary pulleys, each of said ropes being respectively wound onto and off itsrespective winding drum in a direction opposite to the winding-on and windingoff directions of the door-leaf onto and off said roll-up roller.

2. An improved roll-up door as claimed in claim 1, wherein said door-leaf is made from a fabric.

3. An improved roll up door as claimed in claim 2, wherein said fabric is coated with polyvinyl chloride.

4. An improved roll-up door as claimed in claim 2,

wherein said fabric is coated with an epoxy resin.

l l l

Claims (4)

1. An improved roll-up door including a flexible door-leaf, a roller onto which said door is wound, first and second vertical side frames, guide means supported by said side frames for guiding said door during vertical movement, trolleys in said frames for maintaining said door in stretched condition laterally, the improvement comprising first and second pulleys, arranged in said vertical side frames respectively, first and second weights respectively secured to said pulleys for maintaining said flexible door in stretched condition in the vertical direction and simultaneously balancing said door, a groove in each of said pulleys, first and second ropes running in said respective grooves in each of said pulleys, first and second winding drums respectively at the ends of said roll-up roller, and first and second stationary pulleys in said frames, each of said ropes arranged to divide said respective weight into two opposing load components, one through the connection of one of the rope ends to said respective winding drum and the other one through the connection of the remaining rope end to said trolley via said first and second stationary pulleys, each of said ropes being respectively wound onto and off its respective winding drum in a direction opposite to the winding-on and winding-off directions of the door-leaf onto and off said roll-up roller.
1. An improved roll-up door including a flexible door-leaf, a roller onto which said door is wound, first and second vertical side frames, guide means supported by said side frames for guiding said door during vertical movement, trolleys in said frames for maintaining said door in stretched condition laterally, the improvement comprising first and second pulleys, arranged in said vertical side frames respectively, first and second weights respectively secured to said pulleys for maintaining said flexible door in stretched condition in the vertical direction and simultaneously balancing said door, a groove in each of said pulleys, first and second ropes running in said respective grooves in each of said pulleys, first and second winding drums respectively at the ends of said roll-up roller, and first and second stationary pulleys in said frames, each of said ropes arranged to divide said respective weight into two opposing load components, one through the connection of one of the rope ends to said respective winding drum and the other one through the connection of the remaining rope end to said trolley via said first and second stationary pulleys, each of said ropes being respectively wound onto and off its respective winding drum in a direction opposite to the winding-on and winding-off directions of the door-leaf onto and off said roll-up roller.
2. An improved roll-up door as claimed in claim 1, wherein said door-leaf is made from a fabric.
3. An improved roll up door as claimed in claim 2, wherein said fabric is coated with polyvinyl chloride.
US3878879A 1972-08-18 1973-08-14 Roll-up door Expired - Lifetime US3878879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE1075972 1972-08-18

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US3878879A Expired - Lifetime US3878879A (en) 1972-08-18 1973-08-14 Roll-up door

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DE (1) DE2341328C3 (en)
GB (1) GB1444017A (en)

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478268A (en) * 1980-12-29 1984-10-23 Copper Cliff Door Manufacturing (1980) Limited Door structure
EP0125217A2 (en) * 1983-02-03 1984-11-14 Nomafa Ab Roll-up door
US4690194A (en) * 1983-12-13 1987-09-01 Kurt Seuster Door which can be rolled up
EP0247849A2 (en) * 1986-05-27 1987-12-02 Machin Designs Limited Roller blind assembly
US4718471A (en) * 1984-11-05 1988-01-12 Nergeco Fixing and protective housing for the drive means of a concertina type door
US4727919A (en) * 1984-11-07 1988-03-01 Nergeco Safety and emergency actuator device for a concertina type door
GB2200157A (en) * 1987-01-17 1988-07-27 Clark Door Ltd Roller doors
US4760873A (en) * 1985-10-23 1988-08-02 Richard Bubendorff Rolling shutter for roof window
US4800946A (en) * 1986-05-27 1989-01-31 Frommelt Industries, Inc. Windstrap for pliable roll-type overhead door
US4846242A (en) * 1987-10-26 1989-07-11 Paul Baier Roll shutter for roof windows
US4884617A (en) * 1986-12-23 1989-12-05 Coenraets Benoit J Roll-up shutter structure
US4887660A (en) * 1988-06-30 1989-12-19 Frommelt Industries, Inc. Roll-up door
US4896714A (en) * 1987-03-24 1990-01-30 Hy-Roll Manufacturing, Inc. Roll door
US4953608A (en) * 1986-10-09 1990-09-04 Nomafa Ab Safety device, particularly for roll-up doors
US5025847A (en) * 1989-06-27 1991-06-25 Rytec Corporation Apparatus for accommodating application of a force in excess of a predetermined magnitude and closure employing such apparatus
US5048588A (en) * 1989-06-26 1991-09-17 Kelley Company Inc. Roll-up door construction
US5078197A (en) * 1990-04-05 1992-01-07 Kelley Company Inc. Manually operated industrial roll door
US5083600A (en) * 1990-04-05 1992-01-28 Kelley Company Inc. Drive mechanism for an industrial door
US5129442A (en) * 1991-12-26 1992-07-14 Kelley Company Inc. Roll-up industrial door having a combined pulley for counterweight and spring tension belts
US5170833A (en) * 1991-03-22 1992-12-15 M & I Door Systems Limited Compensating mechanism for variable speed roll-up door
US5271448A (en) * 1992-07-27 1993-12-21 Rytec Corporation Movable barrier with two part guide follower
US5299617A (en) * 1991-01-25 1994-04-05 Asi Technologies, Inc. Breakaway roll-up door
US5307857A (en) * 1992-03-27 1994-05-03 Nergeco (Societe Anonyme) Balancing device for a raisable-curtain goods-handling door
US5368084A (en) * 1991-01-25 1994-11-29 Asi Technologies, Inc. Breakaway roll-up door
US5392836A (en) * 1992-06-23 1995-02-28 Rite Hite Corporation Door assembly
US5445209A (en) * 1993-06-04 1995-08-29 Lichy; Dale M. Guide system for vertically moveable flexible door
US5482104A (en) * 1993-06-04 1996-01-09 Lichy; Dale M. Guide system for vertically moveable flexible door
US5488982A (en) * 1990-05-11 1996-02-06 Efaflex Transport Und Lagertechnik Gmbh Lifting door with a slatted armor having articulated slats
US5579820A (en) * 1994-11-10 1996-12-03 Lepage; Robert Roll-up door for vehicle shelters
US5601133A (en) * 1995-03-31 1997-02-11 Overhead Door Corporation Roll-up door
US5620039A (en) * 1995-02-10 1997-04-15 Rytec Corporation Apparatus for providing a slidingly-separable connection between a movable barrier and a means for guiding the barrier
US5632317A (en) * 1995-03-31 1997-05-27 Overhead Door Corporation Roll-up door
US5638883A (en) * 1995-02-10 1997-06-17 Rite-Hite Corporation Breakaway guide assembly for a roller door
US5655591A (en) * 1995-03-31 1997-08-12 Rite-Hite Corporation Tension assembly for roller door
EP0808407A1 (en) * 1995-02-10 1997-11-26 Rite-Hite Corporation Curtain bottom tensioning assembly
US5730197A (en) * 1996-07-24 1998-03-24 Rite-Hite Corporation Tension and release mechanism for belt member on roller door
US5944086A (en) * 1995-02-10 1999-08-31 Rite-Hite Holding Corporation Curtain bottom tensioning assembly
US6067911A (en) * 1998-03-25 2000-05-30 Burrell Leder Beltech, Inc. Flexible vandal-resistant panels
US6089305A (en) * 1995-02-10 2000-07-18 Rite-Hite Holding Corporation Curtain guiding assembly for a soft edge door with a selectively tensioned leading edge
US6155326A (en) * 1999-04-07 2000-12-05 Swiss Bell Farms, Inc. Roll-up doors and curtains
US20030046870A1 (en) * 1999-04-14 2003-03-13 Guido Langenbach Crash protection device
US20030230388A1 (en) * 2002-06-13 2003-12-18 Cormark, Inc. Security cover
US6775936B2 (en) 2002-06-13 2004-08-17 Cormark, Inc. Movable display sign
US20050115688A1 (en) * 2003-02-24 2005-06-02 Friedhelm Frede Rollup door with rollable door leaf
US20050211391A1 (en) * 2002-04-03 2005-09-29 Overhead Door Corporation Rollup door with direct connected drive motor unit
US20050224436A1 (en) * 2003-11-25 2005-10-13 Rosiello Keith M Safety restraint and lift system
US20050247412A1 (en) * 2004-05-04 2005-11-10 Mikael Bengtsson High load operation of an industrial roll door
US20070277942A1 (en) * 2006-06-05 2007-12-06 Jason Dondlinger Track and guide system for a door
US20070277941A1 (en) * 2006-06-05 2007-12-06 Rite-Hite Holding Corporation Track and guide system for a door
US20070277943A1 (en) * 2006-06-05 2007-12-06 Rite-Hite Holding Corporation Track and guide system for a door
US7913711B2 (en) 2008-07-28 2011-03-29 Shelterlogic Llc Door assembly for use in a shelter and a shelter including same
US20110073262A1 (en) * 2009-09-25 2011-03-31 Friedhelm Frede Adjustable counterbalance system for roller doors
CN102452601A (en) * 2010-10-27 2012-05-16 匡立军 Cage curtain electric opening-closing device operated in cage
US9045928B1 (en) * 2013-10-29 2015-06-02 Floating Door, LLC Method and apparatus to raise and lower an overhead door
US20150337594A1 (en) * 2012-11-29 2015-11-26 Efaflex Inzeniring D.O.O. Ljubljana Rolling Gate Having a Door Leaf in the Form of a Flexible Curtain
US9267326B2 (en) 2013-04-22 2016-02-23 Mckeon Rolling Steel Door Company, Inc. Drive assisted roller assembly for rolling door
US9556672B2 (en) * 2014-10-28 2017-01-31 Rite-Hite Holding Corporation Rolling windbars for roll-up doors
US9624708B2 (en) * 2015-03-10 2017-04-18 Ciw Enterprises, Inc. Closure with roller endlock

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DE2742787C2 (en) * 1977-09-23 1983-11-03 Paul 7592 Renchen De Baier
FR2537200A1 (en) * 1982-12-02 1984-06-08 Gonzalez Jean Pierre Invisible counterweight, for lowering a blind and a shutter, above the roofing of a veranda
DE3429781A1 (en) * 1984-04-02 1985-10-10 Schieffer Gmbh Co Kg Roller door with a flexible door leaf
FR2563555A1 (en) * 1984-04-27 1985-10-31 Pons Pierre Tension device enabling a canopy-type blind to be wound and unwound
DE3869433D1 (en) * 1987-01-17 1992-04-30 Clark Door Ltd Rolling doors.
DE3735850C1 (en) * 1987-10-23 1989-02-23 Labex Gmbh Imp Exp Industriean rolling gate
DE29721938U1 (en) * 1997-12-11 1998-02-12 Flexion Ind Doors & Dock Equip Tor, particularly rapid roll-up door
EP1598515A1 (en) * 2004-05-14 2005-11-23 Cardo Door Ab Method of operating a roller door arrangement
DE102013104777A1 (en) * 2013-05-08 2014-11-13 Peter Kochenrath Retractable Awning with engaging on a tensioning cable clamping device

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Cited By (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4478268A (en) * 1980-12-29 1984-10-23 Copper Cliff Door Manufacturing (1980) Limited Door structure
EP0125217A2 (en) * 1983-02-03 1984-11-14 Nomafa Ab Roll-up door
EP0125217A3 (en) * 1983-02-03 1985-01-23 Nordiskafilt Ab Roll-up door
US4690194A (en) * 1983-12-13 1987-09-01 Kurt Seuster Door which can be rolled up
US4718471A (en) * 1984-11-05 1988-01-12 Nergeco Fixing and protective housing for the drive means of a concertina type door
US4727919A (en) * 1984-11-07 1988-03-01 Nergeco Safety and emergency actuator device for a concertina type door
US4760873A (en) * 1985-10-23 1988-08-02 Richard Bubendorff Rolling shutter for roof window
EP0247849A2 (en) * 1986-05-27 1987-12-02 Machin Designs Limited Roller blind assembly
US4800946A (en) * 1986-05-27 1989-01-31 Frommelt Industries, Inc. Windstrap for pliable roll-type overhead door
EP0247849A3 (en) * 1986-05-27 1988-06-08 Machin Designs Limited Roller blind assembly
US4836264A (en) * 1986-05-27 1989-06-06 Machin Designs Limited Roller blind assembly
US4953608A (en) * 1986-10-09 1990-09-04 Nomafa Ab Safety device, particularly for roll-up doors
US4884617A (en) * 1986-12-23 1989-12-05 Coenraets Benoit J Roll-up shutter structure
GB2200157A (en) * 1987-01-17 1988-07-27 Clark Door Ltd Roller doors
GB2200157B (en) * 1987-01-17 1991-03-13 Clark Door Ltd Improvements in and relating to roller doors
US5159967A (en) * 1987-01-17 1992-11-03 Clark Door Limited Improvements in and relating to roller doors
US4896714A (en) * 1987-03-24 1990-01-30 Hy-Roll Manufacturing, Inc. Roll door
US4846242A (en) * 1987-10-26 1989-07-11 Paul Baier Roll shutter for roof windows
US4887660A (en) * 1988-06-30 1989-12-19 Frommelt Industries, Inc. Roll-up door
US5048588A (en) * 1989-06-26 1991-09-17 Kelley Company Inc. Roll-up door construction
US5025847A (en) * 1989-06-27 1991-06-25 Rytec Corporation Apparatus for accommodating application of a force in excess of a predetermined magnitude and closure employing such apparatus
US5078197A (en) * 1990-04-05 1992-01-07 Kelley Company Inc. Manually operated industrial roll door
US5083600A (en) * 1990-04-05 1992-01-28 Kelley Company Inc. Drive mechanism for an industrial door
US5488982A (en) * 1990-05-11 1996-02-06 Efaflex Transport Und Lagertechnik Gmbh Lifting door with a slatted armor having articulated slats
US5368084A (en) * 1991-01-25 1994-11-29 Asi Technologies, Inc. Breakaway roll-up door
US5299617A (en) * 1991-01-25 1994-04-05 Asi Technologies, Inc. Breakaway roll-up door
US5170833A (en) * 1991-03-22 1992-12-15 M & I Door Systems Limited Compensating mechanism for variable speed roll-up door
US5129442A (en) * 1991-12-26 1992-07-14 Kelley Company Inc. Roll-up industrial door having a combined pulley for counterweight and spring tension belts
GB2262760A (en) * 1991-12-26 1993-06-30 Kelley Co Inc Roll-up industrial door
GB2262760B (en) * 1991-12-26 1995-07-12 Kelley Co Inc Roll-up industrial door
US5307857A (en) * 1992-03-27 1994-05-03 Nergeco (Societe Anonyme) Balancing device for a raisable-curtain goods-handling door
US5392836A (en) * 1992-06-23 1995-02-28 Rite Hite Corporation Door assembly
US5271448A (en) * 1992-07-27 1993-12-21 Rytec Corporation Movable barrier with two part guide follower
US5445209A (en) * 1993-06-04 1995-08-29 Lichy; Dale M. Guide system for vertically moveable flexible door
US5482104A (en) * 1993-06-04 1996-01-09 Lichy; Dale M. Guide system for vertically moveable flexible door
USRE42198E1 (en) 1994-11-10 2011-03-08 Rite-Hite Holding Corporation Roll-up door for vehicle shelters
US5579820A (en) * 1994-11-10 1996-12-03 Lepage; Robert Roll-up door for vehicle shelters
US5620039A (en) * 1995-02-10 1997-04-15 Rytec Corporation Apparatus for providing a slidingly-separable connection between a movable barrier and a means for guiding the barrier
EP0808407A4 (en) * 1995-02-10 1998-05-27 Rite Hite Corp Curtain bottom tensioning assembly
US5638883A (en) * 1995-02-10 1997-06-17 Rite-Hite Corporation Breakaway guide assembly for a roller door
US5957187A (en) * 1995-02-10 1999-09-28 Rite-Hite Holding Corporation Releaseable assembly for a door
US5915448A (en) * 1995-02-10 1999-06-29 Rite-Hite Holding Corporation Curtain bottom tensioning assembly
US5944086A (en) * 1995-02-10 1999-08-31 Rite-Hite Holding Corporation Curtain bottom tensioning assembly
US6089305A (en) * 1995-02-10 2000-07-18 Rite-Hite Holding Corporation Curtain guiding assembly for a soft edge door with a selectively tensioned leading edge
EP0808407A1 (en) * 1995-02-10 1997-11-26 Rite-Hite Corporation Curtain bottom tensioning assembly
US5632317A (en) * 1995-03-31 1997-05-27 Overhead Door Corporation Roll-up door
US5655591A (en) * 1995-03-31 1997-08-12 Rite-Hite Corporation Tension assembly for roller door
US5601133A (en) * 1995-03-31 1997-02-11 Overhead Door Corporation Roll-up door
US5730197A (en) * 1996-07-24 1998-03-24 Rite-Hite Corporation Tension and release mechanism for belt member on roller door
US6435101B1 (en) 1998-03-25 2002-08-20 Burrell Leder Beltech, Inc. Flexible vandal-resistant panels
US6067911A (en) * 1998-03-25 2000-05-30 Burrell Leder Beltech, Inc. Flexible vandal-resistant panels
US6155326A (en) * 1999-04-07 2000-12-05 Swiss Bell Farms, Inc. Roll-up doors and curtains
US20030046870A1 (en) * 1999-04-14 2003-03-13 Guido Langenbach Crash protection device
US6901703B2 (en) 1999-04-14 2005-06-07 Rite-Hite Holding Corporation Crash protection device
US7231953B2 (en) * 2002-04-03 2007-06-19 Overhead Door Corporation Rollup door with direct connected drive motor unit
US20050211391A1 (en) * 2002-04-03 2005-09-29 Overhead Door Corporation Rollup door with direct connected drive motor unit
US6775936B2 (en) 2002-06-13 2004-08-17 Cormark, Inc. Movable display sign
US6805187B2 (en) * 2002-06-13 2004-10-19 Cormark, Inc. Security cover
US20030230388A1 (en) * 2002-06-13 2003-12-18 Cormark, Inc. Security cover
US20050115688A1 (en) * 2003-02-24 2005-06-02 Friedhelm Frede Rollup door with rollable door leaf
US20050224436A1 (en) * 2003-11-25 2005-10-13 Rosiello Keith M Safety restraint and lift system
US20050247412A1 (en) * 2004-05-04 2005-11-10 Mikael Bengtsson High load operation of an industrial roll door
US7252133B2 (en) 2004-05-04 2007-08-07 Albany International Corp. High load operation of an industrial roll door
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Also Published As

Publication number Publication date Type
DE2341328B2 (en) 1978-07-20 application
DE2341328A1 (en) 1974-03-14 application
DE2341328C3 (en) 1979-03-08 grant
GB1444017A (en) 1976-07-28 application

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