US3583101A - Device for sealing sliding windows, sliding doors and the like - Google Patents

Device for sealing sliding windows, sliding doors and the like Download PDF

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Publication number
US3583101A
US3583101A US766918A US3583101DA US3583101A US 3583101 A US3583101 A US 3583101A US 766918 A US766918 A US 766918A US 3583101D A US3583101D A US 3583101DA US 3583101 A US3583101 A US 3583101A
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United States
Prior art keywords
casement
seal carrier
displacement direction
carrier means
fixed guide
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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
US766918A
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English (en)
Inventor
Ernst Pudenz
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Individual
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Individual
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Publication date
Priority claimed from DE19671683382 external-priority patent/DE1683382C3/de
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Publication of US3583101A publication Critical patent/US3583101A/en
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
    • E06B7/18—Sealing arrangements on wings or parts co-operating with the wings by means of movable edgings, e.g. draught sealings additionally used for bolting, e.g. by spring force or with operating lever
    • E06B7/20—Sealing arrangements on wings or parts co-operating with the wings by means of movable edgings, e.g. draught sealings additionally used for bolting, e.g. by spring force or with operating lever automatically withdrawn when the wing is opened, e.g. by means of magnetic attraction, a pin or an inclined surface, especially for sills
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/42—Sliding wings; Details of frames with respect to guiding
    • E06B3/46—Horizontally-sliding wings
    • E06B3/4609—Horizontally-sliding wings for windows
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
    • E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
    • E06B3/42—Sliding wings; Details of frames with respect to guiding
    • E06B3/46—Horizontally-sliding wings
    • E06B3/4636—Horizontally-sliding wings for doors
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
    • E06B7/18—Sealing arrangements on wings or parts co-operating with the wings by means of movable edgings, e.g. draught sealings additionally used for bolting, e.g. by spring force or with operating lever

Definitions

  • My invention relates to device for sealing sliding windows, sliding doors and the like, and more particularly of the bypass wherein each casement is displaceable in a single plane.
  • Sliding windows and doors which are lifted are also known wherein the casement or the sliding door respectively is raised by means of a lever system from the locked position thereof and is displaced by means of built-in rollers.
  • similar structures were known in the art heretofore wherein the sliding casements or sliding doors slide on rollers which travel into depressions formed in the guide rails when placed in locking position.
  • the sealing of the respective windows or doors is effected by pressing the rigidly built-in seals against portions of the blind frame.
  • the functional capability of the upper horizontal sealing of the windows or doors is dependent, however, upon the precise assembly of the upper blind frame.
  • a further disadvantage of sliding windows and doors that are furnished with lifting mechanism is that the costs of the auxiliary devices are very high.
  • a considerable disadvantage of the lifting mechanism of the aforementioned type is that only two guide rollers can be employed, which limitation is particularly disadvantageous for windows of relatively heavy construction.
  • a further disadvantage is that a great amount of force is necessary in order to start the casement with its entire weight moving from the rest (lowered) position thereof.
  • a sliding window or sliding door of such construction that the horizontal lower and upper seals thereof, in a locked position of the window or door, are brought yieldably into sealing position by spring-biasing action.
  • I provide in accordance with my invention device for sealing sliding windows, sliding doors and the like having a plurality of casements each displaceable in a single plane, comprising seal carriers mounted within the space formed in the casement frame and constrained to move in a direction perpendicular to the displacement direction of the casement; and sealing strips carried by the seal carriers in the space and extending in the displacement direction of the casement.
  • FIGS. 1 to 3 are front elevational, top plan and side elevational views of a sash window constructed in accordance with my invention
  • FIG. 4 is a much enlarged longitudinal sectional view of FIG. 3;
  • FIG. 5 is a much enlarged fragmentary view of the lower left-hand side of the casement shown in FIG. 1.
  • a sash window formed of a blind frame 1 (FIG. I) and a pair of sliding casements 2 and 3 which are displaceable by means of ball bearing support rollers 7 to 9 along profiled guide rails 5 and 6 (FIG. 2, 4 and 5).
  • the blind frame 1 is assembled from a lower blind frame section 10, an upper blind frame section 11, as well as U-shaped lateral blind frame sections 12 and 13.
  • the lower blind frame section (FIG. 4) is provided at the inner side thereof with two pairs of longitudinal ribs 14, 15 and 16, 17, which accommodate the profiled guide rails 5 and 6 respectively therebetween.
  • the upper blind frame section 11 is also constructed in the same manner as that of the lower section 10 and has longitudinal rib pairs 18 and 19 which respectively receive therebetween guide rails 20 and 21.
  • the lower and upper profile shanks 22 and 23 of the casement 2 have an H-shaped cross section or profile, whereas the vertical profile shanks 24 and 25 (FIG. 2) are of U-shaped cross section.
  • the inner vertical profile shank 25 is additionally provided with a hook-shaped profile section 26 on the side thereof facing the easement 3.
  • the hook-shaped profile section 26 of the casement 2 catches in a corresponding hook-shaped profile section 27 of the easement 3, and can be additionally furnished with a nonillustrated sealing strip for the purpose of effecting better exclusion of air.
  • the profile shanks 22 to 25 are provided with substantially U-shaped elastic seals 28, 29 and 30, 31, adapted to receive glass panes 32a and 32b respectively therein.
  • the casement 2 is provided with relatively wide support rollers 7 mounted on shafts 33 that are secured in U shaped bearing stands 34 respectively.
  • Each bearing stand 34 is screwed to a transverse rib 35 of the respective casement section.
  • a U-shaped seal carrier 36 is displaceably disposed under the transverse rib 35 of the lower casement section and is guided by side portions 37 and 38. Both shanks 39 and 40 of the seal carrier 36 are reinforced and widened at the free ends thereof and are respectively formed thereat with a longitudinal groove 41, 42 serving for receiving therein elastic sealing strips 43 and 44 respectively.
  • the seal carrier 36 is under the biasing influence of several compression springs 45 and 46 which abut at one end in a groove 47 formed in the transverse rib 35, and is carried by two or more lifting rollers 48 and 49 having relatively narrow bearing surfaces and mounted on respective shafts 50 and 51 secured in the shanks 39 and 40.
  • the somewhat curved peakroof shaped guide surface 52 of the guide rail 5 on which the aforementioned wide support rollers 7 of the sliding casement 2 and the lifting rollers 48 and 49 of the seal carrier 36 slide during the displacement operation of the casement is provided with depressions 53 and 54, fitting or accommodating to the width and the radius of the narrow lifting rollers 48 and 49, into which the lifting rollers 48 and 49 run, when the sliding casement 2 is closed.
  • the seal carrier 36 is pressed downward under the biasing action of the compression springs 45 and 46 so that the sealing strips 43 and 44 seal the respective airgaps 55 and 56 between the guide rail 5 and the sidewalls 37 and 38.
  • the lifting rollers 48 and 49 run out of their depressions 53 and 54 and onto the curved guide surface 52, thereby pressing the sealing carrier 36 in an upward direction as viewed in FIG. 4, so that the sealing strips 43 and 44 are raised from the guiding surface.
  • the guide rail 20 of the blind frame section 11 is provided with corresponding depressions 57 and 58 into which the lifting rollers 59 and 60 run when the sliding frame 2 is being closed.
  • the lifting rollers 59 and 60 are mounted on shafts 61 and 62, respectively, which are end supported in the shanks 63 and 64 of the upper seal carrier 65, as viewed in FIG. 4.
  • the reinforced ends 66 and 67 of the shanks 63 and 64 are formed with grooves in which sealing strips 68 and 69 are respectively received.
  • the upper seal carrier 65 is guided laterally by means of the walls 70 and 71 and is subjected to the biasing influence of several leaf springs 72 and 73 which continually maintain the lifting rollers 59 and 60 in engagement with the guide surface of the profiled section 74 of the guide rail 20.
  • the lifting rollers 59 and 60 run into the depressions 57 and 58, respectively as they are moved into the closing position of the of the window.
  • the leaf springs 72 and 73 then force the seal carrier 65 upwardly, as viewed in FIG. 4, and the sealing strips 68 and 69 then assume the task of sealing both the upper and lower sides of the casement.
  • the sliding casement 3 and the guide rail 6 provided therefor, as well as the guide rail 21, are constructed in precisely the same manner as the aforementioned casement 2 and the guide rails associated therewith.
  • the sliding casements 2 and 3 are shown, respectively, in open and closed position in FIG. 4.
  • tandem rollers or more than two roller pairs can be employed instead of rollers 7 or 8, 9, in order to maintain the specific bearing or applied forces of the rollers as small as possible. Since the guide surfaces of the rollers 7, 8, 9 are of considerably wider construction than those of the lifting rollers 48 and 49, the narrow depressions 53 and 54 do not hinder the sliding operation because the rollers 7, 8, 9 roll thereover without changing their relative vertical position.
  • the sealing function of the lower sealing strips 43 and 44 as well as of the upper sealing strips 68 and 69, as viewed in FIG. 4, is always ensured in the condition wherein the associated guide rollers 48 and 49 on the one hand and 59, 60 on the other hand have run into the respective depressions by means of the compression springs 45 and 46 acting together with the intrinsic weight of the sealing carrier 36 or by means of leaf springs 72, 73 which have a relatively high spring force constant.
  • the sealing strips 43 and 44 on the one hand and 68 and 69 on the other hand are preferably ofcircular construction on the side thereof engageable with the guide surfaces of the guide rails, so that an especially good deformation thereof occurs, conforming to the surfaces which are to be sealed.
  • the seal carriers 36, 65 can preferably be combined with the sealing strips 43 and 44 on the one hand and 68 and 69 on the other hand by making them in one piece from plastic material having partially hard and soft structural portions.
  • sealing carriers 36 and 65 and the members associated therewith are preferably formed of light metal or plastic material and are therefore of relatively lightweight, a relatively easy lifting of the sealing carriers 36 and 65 can be achieved when opening the sliding frames 2 and 3, respectively, by suitably curing the guide rails on approaching and leaving the depressions 53 and 54 on the one hand and 57 and 58 on the other hand.
  • the displacing operation proper for relatively large and heavy sliding easements can therefore be relatively easily effected.
  • the sliding casements 2 and 3 are latched by nonillustrated well-known locking devices. These locking devices are preferably constructed so that the sliding easements 2 and 3 can be fixed in any desired position.
  • a draft-free ventilation can be effected by a slight lateral displacement of the sliding casements 2 and 3 so that the sealing strips 43 and 44 on the one hand and 68 and 69 on the other hand are raised slightly from the position wherein they are engaged with the guide rails surfaces and so as to thereby permit the circulation of air into the interior of the building.
  • sliding doors and the like instead of the aforedescribed sliding windows can be furnished in a similar manner with the aforedescribed sealing members, in which case only the lower guide rails have to meet special requirements.
  • the invention is not limited only to sliding windows, sliding doors or the like, which have easements that are movable in horizontal direction, but can also be used obviously for devices with vertically displaceable easements.
  • Device for sealing sliding windows, sliding doors and the like having at least one casement displaceable in a single plane, comprising seal carrier means mounted within spaced formed in upper and lower profile shanks, respectively, of the casement frame and constrained to move in a direction perpendicular to the displacement direction of the casement; sealing strip means carried by said seal carrier means in said space and extending in the displacement direction of the casement, said seal carrier means being actually movable perpendicularly to the displacement direction of the casement in a locking position of the latter for displacing said sealing strip means from a nonsealing position thereof into a position wherein it seals the casement, spring means supported by the casement frame and biasing said seal carrier means in said direction perpendicular to the displacement direction of the casing, fixed guide means extending in said displacement direction of the easement adjacent said casement frame, and lifting roller means supporting said seal carrier means and rollable along said fixed guide means, said lifting roller means cooperating with said fixed guide means for determining the position of said seal carrier means.
  • said fixed guide means comprises a guide rail having a profile formed with at least one depression therein, said lifting roller means being receivable in said depression so as to displace said seal carrier means in substantially vertical direction.
  • Device for sealing sliding windows, sliding doors and the like having at least one casement displaceable in a single plane, comprising seal carrier means mounted within space formed in the easement frame and constrained to move in a direction perpendicular to the displacement direction of the easement, sealing strip means carrier by said seal carrier means in said space and extending in the displacement direction of the casement, spring means supported by the easement frame and biasing said seal carrier means in said direction perpendicular to the displacement direction of the casing, fixed guide means extending in said displacement direction of the casement adjacent said casement frame, lifting roller means supporting said seal carrier means and rollable along said fixed guide means, said lifting roller means cooperating with said fixed guide means for determining the said support rollers, without variation in the vertical position thereof, and said lifting roller means supporting said seal carrier means are movable on the same plane, said lifting rollers means, in closing position of the easements, being rollable into said depression.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
US766918A 1967-10-16 1968-10-11 Device for sealing sliding windows, sliding doors and the like Expired - Lifetime US3583101A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671683382 DE1683382C3 (de) 1967-10-16 1967-10-16 Vorrichtung zum Abdichten von Fenstern, Türen od.dgl. mit mindestens einem verschiebbaren Flügel

Publications (1)

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US766918A Expired - Lifetime US3583101A (en) 1967-10-16 1968-10-11 Device for sealing sliding windows, sliding doors and the like

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JP (1) JPS4821608B1 (de)
AT (1) AT298756B (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762460A (en) * 1969-10-30 1973-10-02 Modernfold Of Canada Ltd Bottom edge seal for movable space divider panels
US3946524A (en) * 1973-02-24 1976-03-30 Dynamit Nobel Ag Blind frame and sash constructions for sash windows, sliding doors, and the like
US4219971A (en) * 1978-04-03 1980-09-02 Curtis Mauroner Pocket window
US4733499A (en) * 1986-02-28 1988-03-29 Guddas Juergen Device for locating the panels of sliding doors and the like in selected positions
US4936049A (en) * 1989-06-26 1990-06-26 Hansen Leslie N Airtight door
WO1993018260A1 (en) * 1992-03-10 1993-09-16 Anthony's Manufacturing Company, Inc. Slider door return and running gear mechanisms
US5884361A (en) * 1994-10-06 1999-03-23 Anthony's Manufacturing Company Slider door mechanism, running gear mechanism and closure return
FR2882780A1 (fr) * 2005-03-04 2006-09-08 Norsk Hydro As Ouvrant pour fenetre de type a ouvrant coulissant, comportant, des moyens de filtre acoustique
US20070022663A1 (en) * 2005-07-30 2007-02-01 F. Athmer Sealing configuration for a sliding door
US20080246375A1 (en) * 2007-04-03 2008-10-09 Berg Neil M Security cabinet
CN100551809C (zh) * 2003-07-28 2009-10-21 东芝电梯株式会社 用于电梯的密封装置
CN1697775B (zh) * 2003-05-14 2010-05-12 东芝电梯株式会社 用于电梯门的密封装置
US20100218430A1 (en) * 2009-03-02 2010-09-02 Open Building Solutions Limited Joinery
US20110283621A1 (en) * 2000-12-22 2011-11-24 Glover J Raymond Gliding door, with vertical movement for providing sealing/ unsealing when closed/opened
AU2015210472B1 (en) * 2014-08-11 2016-02-25 Guangdong Jma Aluminium Profile Factory (Group) Co., Ltd High-tightness sliding device
US20160076293A1 (en) * 2013-04-22 2016-03-17 Hardoor Top Design & Technology Ltd System and device for soft closing
US20160230458A1 (en) * 2013-09-17 2016-08-11 Filobe Co., Ltd. Sliding anti-insect window constructing structure having segmented detachable rail frames
US20190242168A1 (en) * 2016-09-01 2019-08-08 Mypro Research S.R.L. Slide device
US10851572B1 (en) * 2016-12-14 2020-12-01 Andersen Corporation Height compensating sliding fenestration systems and methods
US20220170688A1 (en) * 2019-08-27 2022-06-02 Phc Corporation Cold storage
US20220268070A1 (en) * 2021-02-24 2022-08-25 Thermo Fisher Scientific (Shanghai) Instruments Co., Ltd. Feedback mechanism for biological safety cabinet

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5452210U (de) * 1977-09-20 1979-04-11

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537296A (en) * 1948-10-25 1951-01-09 Yeakel Jacob Elwood Weather strip for doors
US2786240A (en) * 1956-01-30 1957-03-26 Leitner Equipment Company Cabinet
US2931434A (en) * 1957-08-27 1960-04-05 John F Steel Sliding glass door construction
US2996769A (en) * 1955-08-08 1961-08-22 Albert A Kunkel Adjustable weatherstripping for thresholds
US3276167A (en) * 1962-02-26 1966-10-04 Holzaepfel Kg Moebel Christian Sealing element
US3295257A (en) * 1965-03-12 1967-01-03 Hough Mfg Corp Wall panel assembly
US3325944A (en) * 1965-06-23 1967-06-20 Allen Stevens Corp Window sealing device
US3442052A (en) * 1967-05-02 1969-05-06 American Aluminum Window Corp Sealing bar for sliding glass door units

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537296A (en) * 1948-10-25 1951-01-09 Yeakel Jacob Elwood Weather strip for doors
US2996769A (en) * 1955-08-08 1961-08-22 Albert A Kunkel Adjustable weatherstripping for thresholds
US2786240A (en) * 1956-01-30 1957-03-26 Leitner Equipment Company Cabinet
US2931434A (en) * 1957-08-27 1960-04-05 John F Steel Sliding glass door construction
US3276167A (en) * 1962-02-26 1966-10-04 Holzaepfel Kg Moebel Christian Sealing element
US3295257A (en) * 1965-03-12 1967-01-03 Hough Mfg Corp Wall panel assembly
US3325944A (en) * 1965-06-23 1967-06-20 Allen Stevens Corp Window sealing device
US3442052A (en) * 1967-05-02 1969-05-06 American Aluminum Window Corp Sealing bar for sliding glass door units

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762460A (en) * 1969-10-30 1973-10-02 Modernfold Of Canada Ltd Bottom edge seal for movable space divider panels
US3946524A (en) * 1973-02-24 1976-03-30 Dynamit Nobel Ag Blind frame and sash constructions for sash windows, sliding doors, and the like
US4219971A (en) * 1978-04-03 1980-09-02 Curtis Mauroner Pocket window
US4733499A (en) * 1986-02-28 1988-03-29 Guddas Juergen Device for locating the panels of sliding doors and the like in selected positions
US4936049A (en) * 1989-06-26 1990-06-26 Hansen Leslie N Airtight door
WO1993018260A1 (en) * 1992-03-10 1993-09-16 Anthony's Manufacturing Company, Inc. Slider door return and running gear mechanisms
US5884361A (en) * 1994-10-06 1999-03-23 Anthony's Manufacturing Company Slider door mechanism, running gear mechanism and closure return
US20110283621A1 (en) * 2000-12-22 2011-11-24 Glover J Raymond Gliding door, with vertical movement for providing sealing/ unsealing when closed/opened
CN1697775B (zh) * 2003-05-14 2010-05-12 东芝电梯株式会社 用于电梯门的密封装置
CN100551809C (zh) * 2003-07-28 2009-10-21 东芝电梯株式会社 用于电梯的密封装置
FR2882780A1 (fr) * 2005-03-04 2006-09-08 Norsk Hydro As Ouvrant pour fenetre de type a ouvrant coulissant, comportant, des moyens de filtre acoustique
US20070022663A1 (en) * 2005-07-30 2007-02-01 F. Athmer Sealing configuration for a sliding door
US20080246375A1 (en) * 2007-04-03 2008-10-09 Berg Neil M Security cabinet
US20100218430A1 (en) * 2009-03-02 2010-09-02 Open Building Solutions Limited Joinery
US8375516B2 (en) * 2009-03-02 2013-02-19 Open Building Solutions Limited Joinery
US20160076293A1 (en) * 2013-04-22 2016-03-17 Hardoor Top Design & Technology Ltd System and device for soft closing
US20160230458A1 (en) * 2013-09-17 2016-08-11 Filobe Co., Ltd. Sliding anti-insect window constructing structure having segmented detachable rail frames
AU2015210472B1 (en) * 2014-08-11 2016-02-25 Guangdong Jma Aluminium Profile Factory (Group) Co., Ltd High-tightness sliding device
US20190242168A1 (en) * 2016-09-01 2019-08-08 Mypro Research S.R.L. Slide device
US10851572B1 (en) * 2016-12-14 2020-12-01 Andersen Corporation Height compensating sliding fenestration systems and methods
US20220170688A1 (en) * 2019-08-27 2022-06-02 Phc Corporation Cold storage
US12044460B2 (en) * 2019-08-27 2024-07-23 Phc Corporation Cold storage
US20220268070A1 (en) * 2021-02-24 2022-08-25 Thermo Fisher Scientific (Shanghai) Instruments Co., Ltd. Feedback mechanism for biological safety cabinet
US12168900B2 (en) * 2021-02-24 2024-12-17 Thermo Fisher Scientific (Shanghai) Instruments Co., Ltd. Feedback mechanism for biological safety cabinet

Also Published As

Publication number Publication date
JPS4821608B1 (de) 1973-06-29
DE1683382A1 (de) 1971-03-11
AT298756B (de) 1972-05-25
DE1683382B2 (de) 1974-05-09

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