EP0137861B1 - Ferme-porte automatique - Google Patents

Ferme-porte automatique Download PDF

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Publication number
EP0137861B1
EP0137861B1 EP83110196A EP83110196A EP0137861B1 EP 0137861 B1 EP0137861 B1 EP 0137861B1 EP 83110196 A EP83110196 A EP 83110196A EP 83110196 A EP83110196 A EP 83110196A EP 0137861 B1 EP0137861 B1 EP 0137861B1
Authority
EP
European Patent Office
Prior art keywords
door
piston
spring arrangement
door closer
support member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83110196A
Other languages
German (de)
English (en)
Other versions
EP0137861A1 (fr
Inventor
Giselher Sieg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dorma Baubeschlag GmbH and Co KG
Original Assignee
Dorma Baubeschlag GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dorma Baubeschlag GmbH and Co KG filed Critical Dorma Baubeschlag GmbH and Co KG
Priority to EP83110196A priority Critical patent/EP0137861B1/fr
Publication of EP0137861A1 publication Critical patent/EP0137861A1/fr
Application granted granted Critical
Publication of EP0137861B1 publication Critical patent/EP0137861B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/10—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction
    • E05F3/102—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction with rack-and-pinion transmission between driving shaft and piston within the closer housing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
    • E05F15/63—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by swinging arms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/12—Special devices controlling the circulation of the liquid, e.g. valve arrangement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/22—Additional arrangements for closers, e.g. for holding the wing in opened or other position
    • E05F3/224—Additional arrangements for closers, e.g. for holding the wing in opened or other position for assisting in opening the wing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators
    • E05F15/53—Power-operated mechanisms for wings using fluid-pressure actuators for swinging wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
    • E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
    • E05F15/622—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using screw-and-nut mechanisms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/404—Function thereof
    • E05Y2201/41—Function thereof for closing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • E05Y2400/30—Electronic control of motors
    • E05Y2400/3013—Electronic control of motors during manual wing operation
    • E05Y2400/3015—Power assistance
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • the invention relates to an automatic door closer with a closer shaft loaded by a spring arrangement in the closing direction, which guides the displaceable piston of a damping hydraulic piston-cylinder unit, the pressure chamber with the unpressurized space on the one hand via a throttle device and a return channel to the pressure chamber opening check valve is connected.
  • door closers The purpose of door closers is to keep door leaves closed in the normal case, because they can only perform the protective functions intended for them, such as fire protection, radiation protection, sound insulation, burglary protection and privacy protection, when closed.
  • door closers with hydraulic damping are usually provided, which have a spring arrangement with the aid of which the energy required for the automatic closing of the door leaf is stored during manual opening and is used to close the door leaf after the door opening process has ended.
  • the automatic door closing movement is usually dampened by a hydraulic throttle system and thus offers great convenience in terms of reliability and safety.
  • Door closers that meet today's standards now have sophisticated, high-quality technology that includes the function of securely closing the door leaf and, at the same time, ensures harmlessness and largely noiselessness during the closing process thanks to the hydraulic damping systems.
  • Door closers with hydraulic damping are standardized and - insofar as they meet the quality requirements of the standards and goods directives - are constantly monitored for quality.
  • the known door closers meet a high technical standard, they all have the common disadvantage that the energy required for the closing movement of the door leaf must first be applied by the door inspector in addition to the opening resistance of the door leaf during the opening movement. This disadvantage is particularly noticeable in the case of large and heavy doors which require a correspondingly large amount of locking, and in particular when they are e.g. B. by children or older, weaker people. Sometimes this group of people is unable to open such a door without outside help.
  • this known door closer In order to alleviate this generally known defect, the industry offers door closers with locking devices, such as have become known for example from DE-OS 25 41 790.
  • the door leaf In this known door closer, the door leaf is determined from a certain opening angle in that the return opening in the piston is closed by a needle penetrating this opening.
  • this known door closer In addition to this reflux opening in the piston, which can be closed by the needle, this known door closer has a reflux duct provided with a throttle device, which can be opened or closed by an electromagnetically supported holding valve. When this second return flow channel is closed by the electromagnetic valve, the door leaf remains in its open position when the return line located in the piston of the door closer is also closed by the needle.
  • the object of the present invention is to provide a door closer of the type mentioned, which brings about a self-closing of the door leaf at any time and after each door opening and yet enables effortless opening of the door leaf without substantial effort.
  • the support member is designed as a threaded nut acted upon by the spring arrangement, which is guided non-rotatably in the cylinder housing and is penetrated by a spindle having a movement thread, which engages through the spring arrangement and rotates in the door closer housing, but is axially immovably supported and over a transmission having a brake is coupled to an electric motor.
  • a movement thread it is possible that after the energy storage in the spring arrangement by releasing the gear brake, the spring arrangement presses back the support member and thus also the piston acted upon by it under hydraulic damping action, so that the door leaf can be returned in its closed position in a known manner.
  • the support member is designed as a pressure disk acted upon by the spring arrangement, which is connected to a piston rod which passes through the spring arrangement and is guided longitudinally displaceably in the door closer housing and which is connected to a tensioning piston in a engages extension cylinder separate from the master cylinder, which is connected to a pressure medium circuit operated by a pump controlled by an electric motor.
  • the movement of the support member is controlled by an electronic control logic triggered by the door actuation.
  • a door contact to be triggered when the door handle is depressed, for example, which activates the control logic in the sense that the spring preload is already initiated for a certain partial amount of the piston stroke.
  • a plunger coil system which can be actuated by negative pressure and which generates control pulses for the electronic control logic is assigned to the pressure chamber in front of the piston.
  • the door closers shown in FIGS. 1 and 2 have an elongated, rectangular housing 10, through which a cylindrical bore 11 extends, which is closed on both sides with plugs to be explained later. Crossing through the housing 10 extend in a known manner two mutually aligned, not shown stepped bores, which receive bearing inserts with sealing rings, in which the closer shaft 12 is rotatably guided. In its middle length range, the closer shaft has a pinion 13. Both end parts of the closer shaft 12 are prepared for the rotationally fixed reception of a link arm, not shown, for establishing a connection between the door frame and the door leaf by, for example, attaching square edges.
  • a piston 14 is arranged so as to be longitudinally displaceable, which consists of a first piston head 15, a second piston head 16 and a web 17 arranged between them.
  • This web 17 is designed as a rack which meshes with the pinion 13 of the closer shaft 12. Rotational movements of the closer shaft 12 therefore cause longitudinal movements of the piston 14 and vice versa.
  • a check valve 18 is arranged, which opens to the pressure chamber lying to the left of the piston head 15.
  • a spring-loaded pressure relief valve 19 is arranged in the piston head 15, which opens when an overpressure develops in the pressure chamber 20 to the left of the piston head 15, as it occurs for example, if the door leaf is forced shut.
  • a stepped bore 21 into which a throttle cone cooperating with a seat formed by a step is screwed on the left-hand end to form a throttle valve 22.
  • This throttle valve has a throttle cone 23 which can protrude into the stepped part of the stepped bore 21 to restrict the flow.
  • the left-hand end region of the door closer housing 10 is closed by a plug 27 screwed into the cylinder bore 11 with the aid of a sealing ring.
  • This plug 27 has a chamber 28 covered by a membrane towards the pressure chamber 20, into which a pointed plunger 29 of the spring-loaded core bolt 30 of a moving coil system 32, which plunges into a ring coil 31, projects.
  • a support member 33 Adjacent to the piston head 16 of the piston 14, a support member 33 is arranged in the cylinder bore 11, which is acted upon by a spring arrangement 34 in the sense of a displacement of the piston 17 to the left - ie in the closing direction of the door leaf.
  • a closing pressure spring spring assembly 34 which functions as a closing pressure spring spring assembly 34 is at the other 'supported on a housing 10 tightly closing plug 35th
  • the support member 33 consists of a threaded nut which projects with a nose 37 into a longitudinal groove 38 in the cylinder bore 11. So that the threaded nut 36 is longitudinally displaceable, but non-rotatably arranged in the door closer housing 10.
  • the threaded nut 36 engages over a spindle 39, which is sealed in the stopper 35 and can be rotated but axially immovably mounted and has a moving thread, which may be driven by an electric motor via a gear stage 41 and a reduction gear 42 having a brake.
  • An electronic control logic 44 is connected between the power supply and the electric motor 43, which can be controlled on the one hand by the moving coil system 32 and on the other hand by a door contact 45.
  • This door contact 45 may advantageously be actuated by the latch of the door leaf interacting with the striking plate of the door frame - ie by the door handle.
  • the support member 33 consists of a thrust washer 46 which is axially displaceably guided in the cylinder bore 11 and which is firmly connected to a piston rod 47 penetrating the spring arrangement 34 in the longitudinal direction.
  • the piston rod also penetrates the sealing plug 35, which continues into an extension cylinder 48 adjoining the master cylinder 11.
  • This extension cylinder 48 there is a tensioning piston 49 connected to the piston rod 47.
  • This schematically illustrated extension cylinder also houses in its housing part a pump 50 operated by an electric motor 43 and a control valve 51.
  • the channels 52 and 53 between which the pump 50 is connected.
  • a control valve 51 is connected between the channels 52 and 53, through which the pressure medium flow can only flow via the pump 50 when the control valve is blocked, while when the control valve is open, the pressure medium via the parallel channel directly from the cylinder space in front of the tensioning piston 49 in the latter can flow back bypassing the pump.
  • the control logic 44 is activated by the triggered pulse in such a way that the motor 43 is switched on and either in the case of the exemplary embodiment according to FIG. 1 via the gear 42 and the spindle 39 or in the case of 2 via the pump 50 and the tensioning piston 49 - the support member 33 is moved to the right against the force of the spring arrangement 34.
  • the displacement of the support member 33 is set by the control logic. Determines engine running time, which may be set such that the support member 33 has advanced by an amount corresponding to a certain door opening angle.
  • the piston 14 is moved, a negative pressure being generated in the pressure chamber 20, which is converted into an electrical pulse for the control logic 44 by the schematically illustrated moving coil system 32.
  • the motor 43 then receives the command to further bias the spring assembly 34, always according to the amount leading the door leaf movement, which was set when the door was closed. If the door is now opened more quickly, a correspondingly greater negative pressure is established in front of the piston in the pressure chamber and the measured value then changed by the moving coil system 32 is converted by the control logic 44 into a command to the motor 43 "rotate faster.
  • the control logic 44 now issues the command “Relieve the spring and in the embodiment shown in FIG. 1, the brake of the transmission 43 opens, while in the embodiment shown in FIG. 2, the control valve 51 is reversed in such a way that the Pressure medium from the cylinder space in front of the tensioning piston 49 can pass through the channel 53 into the channel 52 and from there into the cylinder space behind the tensioning piston 49.
  • the spring arrangement 34 is thus able to push the support member 33 forward, as a result of which the piston 14 is also pushed by the support member in the direction of the front cylinder end comprising the moving coil system 32. So that the closer shaft 12 is rotated in the closing direction via the rack 17, so that the door leaf is moved in the closed position.
  • the door closing movement is hydraulically damped by the throttle valve 22 which engages in the channels 26, 21, 24, 25.
  • the door contact 45 is actuated again in the closed direction and the electric motor 43 receives its first command again in order to move the support member 33 into its forward stroke corresponding to a preselected door opening angle.
  • control logic 44 reacts in the same way as when the door opening movement has ended and, after the predetermined time, gives the electric motor 43 or the brake of the transmission 42 or the control valve 51 the command "Relieve the spring", so that the full closing force again acts on the piston 14 and is therefore also present on the door leaf.
  • the embodiments shown represent the invention only by way of example, which is by no means limited to this. Rather, various changes and other configurations of the invention are possible.
  • the current representing the external energy can also be replaced by other known forms of energy.
  • the above-described moving coil system 32 is only given as an example and can be replaced by other known systems which are able to convert the movement of the piston into information for the control logic, which also does not necessarily have to be electrical.

Landscapes

  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Claims (5)

1. Dispositif ferme-porte automatique comportant un arbre de fermeture (12) sollicité dans le sens de la fermeture par un élément élastique (34) et guidant le piston déplaçable (14) d'une unité hydraulique à piston et cylindre qui sert à assurer l'amortissement et dont l'enceinte de pression (20) est reliée à l'enceinte sans pression d'une part par une conduite de retour pourvue d'un dispositif d'étranglement et, d'autre part, par une soupape de retenue (18) susceptible de s'ouvrir en direction de l'enceinte de pression (20), caractérisé en ce qu'il est prévu, entre le piston (14) et l'élément élastique (34), un élément d'appui (33) déplaçable indépendamment et susceptible d'être commandé à l'aide d'une énergie externe, au sens d'une pré-tension élastique fonction de l'actionnement de la porte.
2. Dispositif ferme-porte selon la revendication 1, caractérisé en ce que l'élément d'appui (33) est constitué par un écrou (36) sollicité par l'élément élastique (34) guidé dans le cylindre (10) formant carter, tout en étant immobilisé en rotation, ledit écrou étant traversé par une broche (39) pourvue d'un filetage d'entraînement (40) et qui traverse également l'élément élastique (34) tout en étant montée à rotation et de manière immobilisée axialement dans le carter (10) du dispositif ferme-porte et accouplée à un moteur électrique (43) par l'intermédiaire d'un engrenage de transmission (42) comportant un frein.
3. Dispositif ferme-porte selon la revendication 1, caractérisé en ce que l'élément d'appui (33) est constitué par un disque de pression (46) sollicité par l'élément élastique (34) et lié à une tige de piston (47) traversant l'élément élastique (34) guidée de manière longitudinalement déplaçable dans le carter (10) du dispositif ferme-porte, ladite tige de piston étant munie d'un piston tendeur (49) disposé dans un cylindre de rallonge (48) séparé du cylindre principal (11) et relié à un circuit de fluide sous pression commandé par un moteur électrique (43) par l'intermédiaire d'une pompe (50).
4. Dispositif ferme-porte selon une des revendications précédentes, caractérisé en ce que les déplacements de l'élément d'appui (33) sont commandés par un dispositif de commande logique électronique (logique de commande) (44) déclenché par l'actionnement de la porte.
5. Dispositif ferme-porte selon une des revendications précédentes, caractérisé en ce que l'enceinte de pression (20) définie devant le piston (14) est associée à un système de bobine à armature plongeuse (32) susceptible de travailler par dépression afin de produire des impulsions de commande pour la logique de commande (44).
EP83110196A 1983-10-13 1983-10-13 Ferme-porte automatique Expired EP0137861B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83110196A EP0137861B1 (fr) 1983-10-13 1983-10-13 Ferme-porte automatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83110196A EP0137861B1 (fr) 1983-10-13 1983-10-13 Ferme-porte automatique

Publications (2)

Publication Number Publication Date
EP0137861A1 EP0137861A1 (fr) 1985-04-24
EP0137861B1 true EP0137861B1 (fr) 1987-03-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110196A Expired EP0137861B1 (fr) 1983-10-13 1983-10-13 Ferme-porte automatique

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EP (1) EP0137861B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004059843C5 (de) * 2004-12-10 2010-10-07 Dorma Gmbh + Co. Kg Türantrieb
US8225458B1 (en) 2001-07-13 2012-07-24 Hoffberg Steven M Intelligent door restraint
EP1340877B1 (fr) 2002-03-01 2016-05-25 GEZE GmbH Commande de porte
CN109610966A (zh) * 2018-11-20 2019-04-12 中国煤炭科工集团太原研究院有限公司 矿用防爆人车气液控制客厢门启闭的安全联动装置

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Publication number Priority date Publication date Assignee Title
GB9418662D0 (en) * 1994-09-16 1994-11-02 Xcalibre Equipment Ltd Pneumatic system and device
ATE178969T1 (de) * 1995-11-04 1999-04-15 Friedrich Fischer Federgelenk mit parametervorgabe
DE50303560D1 (de) * 2003-01-10 2006-07-06 Olsberg Hermann Everken Gmbh Festbrennstofffeuerstätte für den häuslichen Bereich
FI114815B (fi) * 2003-09-18 2004-12-31 Abloy Oy Järjestely kääntöovilaitteistossa
DE102006026008A1 (de) * 2006-06-01 2007-12-06 Dorma Gmbh + Co. Kg Türantrieb mit während der Türbewegung veränderbarer Federvorspannung
DE102011001203A1 (de) * 2011-03-10 2012-09-13 Spartherm Feuerungstechnik Gmbh Kamin- oder Kachelofen oder Kamineinsatz
DE202012002922U1 (de) 2012-03-21 2012-05-08 Maximilian Sarnow Türgriffsystem welches selbständig die Oberfläche des Griffstücks reinigt und mit einem Hydrauliksystem betrieben wird
CN102704779B (zh) * 2012-05-29 2015-07-01 重庆广播电视大学 门防夹装置
DE102022205037A1 (de) * 2022-05-20 2023-11-23 Geze Gmbh Türantrieb

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
DE2541790C2 (de) * 1975-09-19 1985-08-01 Dorma-Baubeschlag Gmbh & Co Kg, 5828 Ennepetal Selbsttätiger Türschließer mit Feststellvorrichtung
US4115897A (en) * 1977-10-11 1978-09-26 Eaton Corporation Zero force hold open door closer
US4339843A (en) * 1978-03-20 1982-07-20 Reading-Dorma Closer Corporation Door closer with assist or door operating features
FI63622C (fi) * 1979-02-01 1983-07-11 Waertsilae Oy Ab Doerrmanoevreringssystem

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8225458B1 (en) 2001-07-13 2012-07-24 Hoffberg Steven M Intelligent door restraint
US9121217B1 (en) 2001-07-13 2015-09-01 Steven M. Hoffberg Intelligent door restraint
EP1340877B1 (fr) 2002-03-01 2016-05-25 GEZE GmbH Commande de porte
DE102004059843C5 (de) * 2004-12-10 2010-10-07 Dorma Gmbh + Co. Kg Türantrieb
CN109610966A (zh) * 2018-11-20 2019-04-12 中国煤炭科工集团太原研究院有限公司 矿用防爆人车气液控制客厢门启闭的安全联动装置
CN109610966B (zh) * 2018-11-20 2020-05-08 中国煤炭科工集团太原研究院有限公司 矿用防爆人车气液控制客厢门启闭的安全联动装置

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Publication number Publication date
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