US3137888A - Concealed overhead door closer - Google Patents

Concealed overhead door closer Download PDF

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Publication number
US3137888A
US3137888A US165483A US16548362A US3137888A US 3137888 A US3137888 A US 3137888A US 165483 A US165483 A US 165483A US 16548362 A US16548362 A US 16548362A US 3137888 A US3137888 A US 3137888A
Authority
US
United States
Prior art keywords
chamber
piston
door
cam
oil
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 - Lifetime
Application number
US165483A
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English (en)
Inventor
Conrad C Blom
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.)
BOMMER SPRING HINGE CO Inc
Original Assignee
BOMMER SPRING HINGE CO Inc
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 BOMMER SPRING HINGE CO Inc filed Critical BOMMER SPRING HINGE CO Inc
Priority to US165483A priority Critical patent/US3137888A/en
Priority to GB1227/63A priority patent/GB978967A/en
Priority to ES284035A priority patent/ES284035A1/es
Priority to DE19631459132 priority patent/DE1459132A1/de
Application granted granted Critical
Publication of US3137888A publication Critical patent/US3137888A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E05F3/104—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 cam-and-slide transmission between driving shaft and piston within the closer housing
    • 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
    • E05Y2800/00—Details, accessories and auxiliary operations not otherwise provided for
    • E05Y2800/20—Combinations of elements
    • E05Y2800/21—Combinations of elements of identical elements, e.g. of identical compression springs
    • 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

  • This invention relates to door closers and more particularly to concealed overhead door closers connected tothe upperedge of a door.
  • FIG. 1 is a longitudinal cross section partly broken away of the part to be installed in 'the upper frame portion of a doorframe and also the part to be installed in the upper edge of the (worm be connected. 2
  • FIG. 2 is across section at right angles to the cross section of FIG. 1 of the part illustrated in FIG. 1!
  • FIG. 3 is an exploded perspective on a larger scale than the scale of FIG. 1 with'parts broken away in 'the interest of clarity.
  • FIGQ4 is a side view of the arm secured to the door to beconnected.
  • the conventional arm 1 is securedto'the upper edge of (the door 2 which arm 1 is preferably countersun'k'in the upperedge of the door 2 as shown.
  • the armtl has anenlargement 3 ,at one end and a second enlargement 4 at the other end in which en- 1argem'ent"4 there is formed apolygonally shaped socket or'recess 5 concentric withtthe axis of.
  • Zand has' two recesses 17 and 18 on its periphery to formilow spots or recesses from the high main spot of, the cam .16 to cooperate with the rollers19 and 20 at the free end of the frame portions'21 and 22 and the ends 23 and 24.0f the bars 25 and 2 6 respectively.
  • Therollers 19 and 2.0 and ends 23'and 24 are provided with recesses 27,28, 2.9'and respectively, to c'lear the intermediate raised'portions 31 of the cam 16, the raised portions 31 being disposed intermediate to similar recesses 17 on one side of the cam 16 and to similar recesses 18 on the other side of the cam-16.
  • rollersll9 and 2 0 are pivotally connected to the free ends of the frame portions 21 and- 22 and by the shafts ,32 and the ends 23. and 2 4 of the-bars 25'and 26 areconnected to the frame portions'21 and 22 by the pins 33.
  • the shaft portion 15 of the shaft'7 is slidably mounted in the registering slots 34 in theframe portions 21 and 22 so that the frame portions 21 and 22 may be actuated by the cam 16 about its shaft 7 which is journalled in bearings 9and .13 fixed inuthe walls 10 and 14 relative to the movement of, the frame, portions 21 and 22, along the walls 10 and 14 of the housing 11.
  • the registering slots 34 in the frames 21 and 22 cooperating with the shaft 7 will in .turn cooperate with the rollers 19 and 20 cooperating with ,the cam 16"and still further cooperate with the bars 25 and 26 passing through in the partition37 to control the smooth movement of the frames 21 and 22, in turn to facilitate the smooth movement of the bars 25 and 26 in the interest of an even, uniform, smooth movernent of the door into and outof its open and closed door positions, when the door 2 throughthe cam 16 will cooperate with ithe rollers 19 and 26 either to compress the springs 49 and 50 when the door is moved into open position or to liberate the springs 49 and 50 when moving into closed door position.
  • the bars 25 and 2 6 extentd through 'the partition 37 of the housing 11 and are connected to one another by the yoke 38 which yoke 38 in turn is connected by the pivot pin 39 to the piston rod 40 which extends through the partition 41 of the housing portion 42 and then through the sealing disk 43 in the chamber formed by the cylindrical ,wall 44.
  • the sealing disk 43 there is provided the annulus 45 on the piston rod 40 andbeyond the annulus 45 the cylindrical portion 46, and beyond the cylindrical portion 46 the piston 40 is connected to the piston ahead 47 slidably mounted in the chamber 48 formed by the cylindrical wall 44.
  • the chamber 51 in the housing portion 42 is a supply charnberfthe oil heing suppliedthereto through the opening 53 provided with the screw cap 54. From vthe chamber 51 the oil may pass'through the orifice 55 into the portion of the chamber 48 between the piston head 47 and the annulus 45. From the chamber 51 the oil may also pass through the canal 56 to the common canal 57into t he portion of the chamber 48 disposed between the piston head 47 and the common canal 57. 'rmm the canal in turn through the canal 58, the oil may pass into the oil expansion chamber 59.
  • the oil expansion chamber 59 has a valve 60 under pressureof' the spring 61 disposed in the chamber 591between the valve '60 and the parti-tion 41 t'he part of the chamber betweenthe valve and the partition 41 being exposed to the atmosphere and thereby to the atmospheric pressure through the opening 71.
  • the'charnber 62 provided with a ball valve 63 to closethe entrance64to the canal 65 passing through the rod 40 into "the chamber 48 when .the pressure of the oil is exercised on the side of the piston head 47 disposed between the piston 'head 47 and the cana1'57.
  • the entrance 164 to the canal 65 and from the canal 65 through the piston 40 into the side of the chamber 48 disposed between the piston head 47 and the annulus 45 cooperates with the chamber 62 and the staked opening 71 to permit the oil in the portion of the chamber 48 disposed between the piston head 47 and the annulus 45 rapidly to pass to the portion of the chamber 48 disposed between the piston head 47 and the canal 57 when the door is swung from closed position into open position and the piston head 47 moves from right to left in which case the pressure of the oil is on the side of the piston head facing the annulus 45 and freeing the ball 63 from the entrance 64.
  • the door moves from the open position shown in FIGS.
  • the piston head 47 moves to the right, that is toward the canal 57, and the pressure of the oil will be on the side of the piston head 47 facing the canal 57 in turn to seat the ball valve 63 on the entrance 64 to the canal 65 and thereby cause the oil in the portion of the chamber 48 disposed between the piston head 47 and the canal 57 to pass out through the canal 57 and 56 into the supply chamber 51 and from the supply chamber 51 through the opening 55 into the side of the portion of the chamber 48 disposed between the piston head 47 and the annulus 45.
  • valve 60 and expansion chamber 59 of course act upon the medium, the oil as an instance, to maintain the same at a substantially uniform pressure.
  • the channels 56, 57 and 58 there is provided the chamber 67, the channels 56 and 58 being in communication with the chamber 67 so that oil from the supply chamber 51 may pass through the channel 56 into the chamber 67 and then through the channel 57 into the chamber 68 facing the piston head 47.
  • the expansion chamber 59 by means of the channel 58 communicates with the chamber 57 so that an increase or decrease in pressure in the oil in the expansion chamber 59 may be transmitted to the oil in the chamber 68.
  • the smooth action of the cam 16 in turn of the door 2 is thus supplemented by the oil in the expansion chamber 59 to insure the smooth, even operation of the door 2 at all temperatures regardless of the weather and in turn regardless of the speed of motion transmitted to the door when closing or opening the same.
  • the chamber 67 is provided with the conventional valve 69 for regulating the velocity of the movement of the oil through the channel 57 into the chamber portion 68 and thereby to regulate the speed of movement of the door 2 when opening or closing the same.
  • the low spots 17 and 18 of the cam 16 in turn cooperate with the rollers 17, 18 or ends 23, 24 to anchor the door in the open position as shown in FIGS. 1 and 2 in one case or in the closed position, depending upon the position of the cam 16, as per convention.
  • One of the advantages achieved from the concealed overhead door closer is that the danger of receiving foreign matter such as dirt, sweepings, and the like will be definitely avoided.
  • One of the problems heretofore encountered with overhead door closers was the problem of producing a closer that would fit into a comparatively small compact space. With a single spring construction, the diameter of the spring would call for a much deeper hole than would be necessary when two springs, such as the springs 49 and 50 in the present case, are used.
  • pivot pin 39 will impart the flexibility required to the bracket 38 and rods 25 and 26 when actuated by the shaft 7 to prevent binding;
  • a door closer housing having an end wall mounted in said overhead frame portion having a shaft having an axis registering with the axis of the pivot point of the door, a projection extending downwardly from said shaft having a polygonal periphery conforming to the polygonal shape of said socket and fitting said socket, a cam on said shaft, a pair of arms, a bracket connected to said arms, having abutments en gaging said cam and engaging said end wall as a stop to determine the extended position of said arms, a yoke connecting the inner ends of said arms, a fixed partition in said housing, said arms extending through said partition, springs mounted on said arms tensed between said yoke and said partition with said bracket disposed between said end wall and said partition, a closed piston chamber, a piston head mounted in said chamber, a piston rod connecting said head to said yoke

Landscapes

  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Fluid-Damping Devices (AREA)
US165483A 1962-01-11 1962-01-11 Concealed overhead door closer Expired - Lifetime US3137888A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US165483A US3137888A (en) 1962-01-11 1962-01-11 Concealed overhead door closer
GB1227/63A GB978967A (en) 1962-01-11 1963-01-10 Improvements in or relating to door closing devices
ES284035A ES284035A1 (es) 1962-01-11 1963-01-10 Un aparato para el cierre de puertas
DE19631459132 DE1459132A1 (de) 1962-01-11 1963-01-10 Tuerschliesser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US165483A US3137888A (en) 1962-01-11 1962-01-11 Concealed overhead door closer

Publications (1)

Publication Number Publication Date
US3137888A true US3137888A (en) 1964-06-23

Family

ID=22599087

Family Applications (1)

Application Number Title Priority Date Filing Date
US165483A Expired - Lifetime US3137888A (en) 1962-01-11 1962-01-11 Concealed overhead door closer

Country Status (4)

Country Link
US (1) US3137888A (de)
DE (1) DE1459132A1 (de)
ES (1) ES284035A1 (de)
GB (1) GB978967A (de)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507001A (en) * 1967-04-12 1970-04-21 James Gibbons Ltd Door closing springs and checks
US3668737A (en) * 1968-11-07 1972-06-13 Doerken & Mankel Kg Automatic door closer
US3887961A (en) * 1973-06-15 1975-06-10 Jaakko Saajos Damping assemblies for doors or the like
US3911527A (en) * 1971-10-14 1975-10-14 Lcn Closers Spring adjustment mechanism
US4075734A (en) * 1976-07-21 1978-02-28 Tokico Ltd. Door closer
US4349939A (en) * 1979-06-15 1982-09-21 Dorma-Baubeschlag Gmbh & Co. Kg Automatic door closer
EP0298514A1 (de) * 1987-07-10 1989-01-11 Kabushiki Kaisha Sankyo Seiki Seisakusho Mechanischer Türschliesser
EP0469697A1 (de) * 1990-07-31 1992-02-05 Dong Kwang Corporation Hydraulischer Türschliesser
EP0545680A1 (de) * 1991-12-06 1993-06-09 Ryobi Ltd. Fussbodentürschliesser
US5272787A (en) * 1991-08-08 1993-12-28 Mike Salena Overhead concealed door closer, mechanically, hydraulically operated
US5666692A (en) * 1996-01-31 1997-09-16 Jackson Corporation Adjustable power closure
US20030093872A1 (en) * 2001-10-10 2003-05-22 Jebron Limited Door closer
US20060021189A1 (en) * 2004-07-30 2006-02-02 Johnson Loring M Door closer
US20080034535A1 (en) * 2006-07-20 2008-02-14 Chi-Tsao Chiang Door closer
US20090093913A1 (en) * 2007-04-24 2009-04-09 Copeland Ii David James Door closer assembly
US20090139146A1 (en) * 2004-06-30 2009-06-04 Yale Security Inc. Door operator
US20100064472A1 (en) * 2007-01-12 2010-03-18 Dorma Gmbh + Co.Kg Door Closer
US20110030167A1 (en) * 2009-08-07 2011-02-10 Heng Kuo Co., Ltd. Adjustable hinged door closer
US20120117758A1 (en) * 2009-07-24 2012-05-17 Dorma Gmbh + Co. Kg Hinged Door with Hinge Plate
US20120117755A1 (en) * 2009-07-24 2012-05-17 Dorma Gmbh + Co. Kg Door Closer
US20120210540A1 (en) * 2011-02-22 2012-08-23 Mckibben Aaron Patrick Door actuator
US20130000074A1 (en) * 2009-12-01 2013-01-03 Volker Bienek Door Closer Comprising Cam Drive
US20130081227A1 (en) * 2010-03-29 2013-04-04 Ingersoll Rand Security Technologies Limited Door closer
US8415902B2 (en) 2010-04-16 2013-04-09 Yale Security Inc. Door closer with calibration mode
US8527101B2 (en) 2010-04-16 2013-09-03 Yale Security Inc. Door closer assembly
US8547046B2 (en) 2010-04-16 2013-10-01 Yale Security Inc. Door closer with self-powered control unit
US8564235B2 (en) 2010-04-16 2013-10-22 Yale Security Inc. Self-adjusting door closer
US8773237B2 (en) 2010-04-16 2014-07-08 Yale Security Inc. Door closer with teach mode
US8779713B2 (en) 2010-04-16 2014-07-15 Yale Security Inc. Door closer with dynamically adjustable latch region parameters
US8863357B1 (en) * 2013-05-08 2014-10-21 Heng Kuo Co., Ltd Adjustable door closer
US9163446B2 (en) 2010-03-17 2015-10-20 Yale Security Inc. Door control apparatus
US9714534B1 (en) * 2016-08-01 2017-07-25 International Door Closers, Inc. Door closer
USD858253S1 (en) * 2016-10-18 2019-09-03 International Door Closers, Inc. Door closer
US11261637B2 (en) * 2016-12-15 2022-03-01 In & Tec S.R.L. Hinge for the rotatable movement of a door, a shutter or the like

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN152704B (de) * 1979-03-20 1984-03-17 Perkins & Powell Ltd
CN107630616A (zh) * 2017-09-14 2018-01-26 天津思耐德精密机械有限公司 一种阻尼装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB512126A (en) * 1939-02-07 1939-08-29 Walter Rowley Ltd Improvements in door closing and checking appliances
US3009191A (en) * 1958-03-06 1961-11-21 Shelby Spring Hinge Company Door closer
US3021556A (en) * 1959-05-15 1962-02-20 Shelby Spring Hinge Company Double acting door closer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB512126A (en) * 1939-02-07 1939-08-29 Walter Rowley Ltd Improvements in door closing and checking appliances
US3009191A (en) * 1958-03-06 1961-11-21 Shelby Spring Hinge Company Door closer
US3021556A (en) * 1959-05-15 1962-02-20 Shelby Spring Hinge Company Double acting door closer

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3507001A (en) * 1967-04-12 1970-04-21 James Gibbons Ltd Door closing springs and checks
US3668737A (en) * 1968-11-07 1972-06-13 Doerken & Mankel Kg Automatic door closer
US3911527A (en) * 1971-10-14 1975-10-14 Lcn Closers Spring adjustment mechanism
US3887961A (en) * 1973-06-15 1975-06-10 Jaakko Saajos Damping assemblies for doors or the like
US4075734A (en) * 1976-07-21 1978-02-28 Tokico Ltd. Door closer
US4349939A (en) * 1979-06-15 1982-09-21 Dorma-Baubeschlag Gmbh & Co. Kg Automatic door closer
EP0298514A1 (de) * 1987-07-10 1989-01-11 Kabushiki Kaisha Sankyo Seiki Seisakusho Mechanischer Türschliesser
EP0469697A1 (de) * 1990-07-31 1992-02-05 Dong Kwang Corporation Hydraulischer Türschliesser
US5272787A (en) * 1991-08-08 1993-12-28 Mike Salena Overhead concealed door closer, mechanically, hydraulically operated
EP0545680A1 (de) * 1991-12-06 1993-06-09 Ryobi Ltd. Fussbodentürschliesser
US5666692A (en) * 1996-01-31 1997-09-16 Jackson Corporation Adjustable power closure
US20030093872A1 (en) * 2001-10-10 2003-05-22 Jebron Limited Door closer
US7003847B2 (en) * 2001-10-11 2006-02-28 Jebron Limited Door closer
US8109038B2 (en) 2004-06-30 2012-02-07 Yale Security Inc. Door operator
US20090139146A1 (en) * 2004-06-30 2009-06-04 Yale Security Inc. Door operator
US8499495B2 (en) 2004-06-30 2013-08-06 Yale Security Inc. Door operator
US20060021189A1 (en) * 2004-07-30 2006-02-02 Johnson Loring M Door closer
US20080034535A1 (en) * 2006-07-20 2008-02-14 Chi-Tsao Chiang Door closer
US8732904B2 (en) * 2007-01-12 2014-05-27 Dorma Gmbh + Co. Kg Door closer
US20100064472A1 (en) * 2007-01-12 2010-03-18 Dorma Gmbh + Co.Kg Door Closer
US20110231023A1 (en) * 2007-04-24 2011-09-22 Yale Security Inc. Door closer assembly
US7971316B2 (en) 2007-04-24 2011-07-05 Yale Security Inc. Door closer assembly
US9399884B2 (en) 2007-04-24 2016-07-26 Yale Security Inc. Door closer assembly
US20090093913A1 (en) * 2007-04-24 2009-04-09 Copeland Ii David James Door closer assembly
US8600567B2 (en) 2007-04-24 2013-12-03 Yale Security Inc. Door closer assembly
US20120117758A1 (en) * 2009-07-24 2012-05-17 Dorma Gmbh + Co. Kg Hinged Door with Hinge Plate
US20120117755A1 (en) * 2009-07-24 2012-05-17 Dorma Gmbh + Co. Kg Door Closer
US9695621B2 (en) * 2009-07-24 2017-07-04 Dorma Deutschland Gmbh Hinged door with hinge plate
US8181311B2 (en) * 2009-08-07 2012-05-22 Heng Kuo Co., Ltd. Adjustable hinged door closer
US20110030167A1 (en) * 2009-08-07 2011-02-10 Heng Kuo Co., Ltd. Adjustable hinged door closer
US20130000074A1 (en) * 2009-12-01 2013-01-03 Volker Bienek Door Closer Comprising Cam Drive
US8826494B2 (en) * 2009-12-01 2014-09-09 Dorma Gmbh + Co. Kg Door closer comprising cam drive
US9163446B2 (en) 2010-03-17 2015-10-20 Yale Security Inc. Door control apparatus
US20130081227A1 (en) * 2010-03-29 2013-04-04 Ingersoll Rand Security Technologies Limited Door closer
US8527101B2 (en) 2010-04-16 2013-09-03 Yale Security Inc. Door closer assembly
US8547046B2 (en) 2010-04-16 2013-10-01 Yale Security Inc. Door closer with self-powered control unit
US8564235B2 (en) 2010-04-16 2013-10-22 Yale Security Inc. Self-adjusting door closer
US8773237B2 (en) 2010-04-16 2014-07-08 Yale Security Inc. Door closer with teach mode
US8779713B2 (en) 2010-04-16 2014-07-15 Yale Security Inc. Door closer with dynamically adjustable latch region parameters
US9523230B2 (en) 2010-04-16 2016-12-20 Yale Security Inc. Door closer assembly
US8415902B2 (en) 2010-04-16 2013-04-09 Yale Security Inc. Door closer with calibration mode
US9482041B2 (en) * 2011-02-22 2016-11-01 Schlage Lock Company Llc Door actuator
US20150020350A1 (en) * 2011-02-22 2015-01-22 Schlage Lock Company Llc Door actuator
US20120210540A1 (en) * 2011-02-22 2012-08-23 Mckibben Aaron Patrick Door actuator
US8793838B2 (en) * 2011-02-22 2014-08-05 Schlage Lock Company Llc Door actuator
US20140331449A1 (en) * 2013-05-08 2014-11-13 Heng Kuo Co., Ltd Adjustable door closer
US8863357B1 (en) * 2013-05-08 2014-10-21 Heng Kuo Co., Ltd Adjustable door closer
US9714534B1 (en) * 2016-08-01 2017-07-25 International Door Closers, Inc. Door closer
WO2018026823A1 (en) * 2016-08-01 2018-02-08 International Door Closers, Inc. Door closer
USD858253S1 (en) * 2016-10-18 2019-09-03 International Door Closers, Inc. Door closer
US11261637B2 (en) * 2016-12-15 2022-03-01 In & Tec S.R.L. Hinge for the rotatable movement of a door, a shutter or the like

Also Published As

Publication number Publication date
DE1459132A1 (de) 1968-12-12
ES284035A1 (es) 1963-06-16
GB978967A (en) 1965-01-01

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