Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
  • E05D15/00—Suspension arrangements for wings
  • E05D15/40—Suspension arrangements for wings supported on arms movable in vertical planes
  • E05D15/44—Suspension arrangements for wings supported on arms movable in vertical planes with pivoted arms and vertically-sliding guides
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
  • E05D11/00—Additional features or accessories of hinges
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
  • E05D15/00—Suspension arrangements for wings
  • E05D15/40—Suspension arrangements for wings supported on arms movable in vertical planes
• • 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
  • E05Y2900/148—Windows

Definitions

• Linkage mechanism having a link with a weakened area
• the current invention relates to a linkage mechanism comprising two links connected together by a fastener in such a way that the two links are pivo- table with respect to each other about the longitudinal axis of the fastener.
• Linkage mechanisms of this type are commonly used in many different types of applications.
• One example of such a linkage mechanism is shown in WO 03/018946.
• This document discloses a window frame assembly where the window pivots outwardly and about an axis which is arranged parallel to and close to the upper side of the window sash.
• a linkage mechanism is arranged on each side of the window sash. The linkage mechanisms are designed to allow the window sash to be opened as well as reversed.
• a second aspect of the current invention is to provide a linkage mechanism as mentioned in the opening paragraph which is more "failsafe” but which does not increase the cost and/or complexity of the resulting linkage mechanism significantly.
• At least one of the two links of the linkage mechanism as mentioned in the opening paragraph comprises a weakened area near to the fastener.
• the weakened area of the link can furthermore be designed such that when a bending moment is applied to one of said links about an axis which is perpendicular to the axis of the fastener, the link deforms at the weakened area.
• the main part of the deformations of the linkage mechanism occurs at the weakened area of the link and not in the fastener or in the portion of the link which is in contact with the fastener. This prevents the joint from failing in the case where unexpected bending moments are applied to the linkage mechanism.
• the term “near to” should be understood as being close enough to the fastener such that when a load is applied to the linkage, the effect of that load on the linkage as experienced by the link at the location of the fastener is similar to the load on the linkage as experienced by the link at the location of the weakened area.
• the phrase "applied to one of said links about an axis which is perpendicular to the axis of the fastener” should be interpreted as referring to any bending moment which has at least one component about an axis which is perpendicular to the axis of the fastener.
• the weakened area can be an area of the link where the cross section perpendicular to the longitudinal axis of the link has a reduced area moment of inertia with respect to the rest of the link.
• the weakened area can be an area where material has been removed from the link.
• the weakened area could be a hole through the link.
• the material removal could occur through many different processes, for example milling, drilling, stamping, as well as many others.
• the weakened area could be an area of the link which has been reduced in thickness when compared to the thickness of the rest of the link. This reduction of thickness could occur as a result of, for example, compressing, milling, and stamping, to name just a few.
• the weakened area could be an area of the link where the material properties are different from the rest of the link.
• the weakened area could be located at a distance from the fastener which is approximately equal to the width of the link. This would place the weakened area near to the fastener, but not too close to the fastener.
• linkage mechanism is in a window frame assembly.
• the link comprising a weakened area could be a link which is in compression during normal use.
• Figure 1 shows a schematic perspective view of a simple outwardly opening window frame assembly.
• Figure 2 shows a detail view of one end of one embodiment of a link with a weakened area.
• Figure 3 shows a detail view of one end of a second embodiment of a link with a weakened area.
• Figure 4 shows a detail view of one end of a third embodiment of a link with a weakened area.
• FIG. 1 shows a simple outwardly opening window assembly 1.
• the window assembly 1 comprises a window frame 2, a window sash 3 and two supporting links 4.
• the supporting links 4 are connected at a first end 4a to the inside of the frame 2 via a fastener 5.
• the fastener 5 is of the type which allows the supporting link to pivot with respect to the frame about the longitudinal axis of the fastener.
• the supporting links 4 are connected at a second end 4b to the outside of the window sash 3 via a fastener 5.
• the fastener is of the kind which allows pivotable motion between the sash and the supporting links about the longitudinal axis of the fastener.
• the sash 3 is furthermore slideably and pivotably connected to the frame 2 via two taps (not shown) on the sash which are arranged in two slots 6 arranged in the frame.
• the taps are arranged one on each side and at the top of the sash and the slots 6 are arranged one on each side of the frame 2.
• the window assembly 1 shown in figure 1 can be thought of as having two separate linkage mechanisms, one on the right and one on the left side of the window.
• the frame and the sash are considered to be links of both the left and the right linkage mechanisms.
• the frame and the supporting link can be thought of as two links of a linkage mechanism.
• the sash and the respective supporting link can also be thought of as two links of a linkage mechanism. Since the supporting links 4 are under compression during normal use, the links are designed with a cross section having a rather high area moment of inertia in order to prevent the links from buckling during normal use. This makes the supporting links very stiff.
• the resulting large bending moments applied to the links of the remaining linkage mechanism are transferred directly to the joints between the links about axes which are perpendicular to the longitudinal axis of the fastener. This can cause the fasteners to deform and/or the links to de- form in the area about the fastener.
• the fasteners and/or the area of the links about the fasteners deform, there is a risk that the joint will fail thereby allowing the two parts which were held together by the fastener to release each other.
• the deformation of the fastener could be so large that the fastener itself breaks.
• the fas- tener could deform slightly and the hole in the link through which the fastener is placed could deform slightly, the two deformations thus allowing the fastener to slip through the hole.
• the supporting links 4 are formed with a weakened area 7 arranged near each of the fasteners 5.
• the weakened area 7 is formed by stamping an oval shaped hole 7 through the supporting link 4.
• This embodiment of a supporting link with a weakened area is shown in more detail in figure 2. Due to the weakened area, in the case where a large bending moment is applied to the supporting link about an axis other than the longitudinal axis of the fastener, the supporting link 4 will deform at the weakened area, thereby protecting the fastener from deformation. The deformation of the weakened area 7 of the link 4 will not cause the link to break, it will just bend or deform in another way. In this way, the linkage will just deform instead of failing. The window sash and pane will therefore be prevented from falling away from the frame since the window sash and the window frame will remain connected.
• the weakened area can be formed in many different ways.
• Figures 3 and 4 show two other embodiments of a supporting link with a weakened area.
• Figure 3 shows a supporting link 10 where two slots 11 have been stamped through each side of the supporting link near the fastener 5.
• the slots in figure 3, as well as the hole shown in figure 2 could also be formed in many other ways besides stamping. For example they could be formed by milling, drilling, or they could be formed at the same time as the link is formed, for example during a forging process.
• Figure 4 shows a third embodiment of a supporting link 20.
• a portion 21 of the link has been reduced in thickness.
• One way of achieving this reduction in thickness is by compressing a portion of the link in a press.
• the thickness could be reduced by milling a portion of one of the surfaces of the supporting link.
• the weakened area has been located at a distance from the fastener which is approximately equal to the width of the link.
• the width of the links is about 1.5cm and the weakened area is located between 1 and 2cm from the fastener.
• this distance could be chosen differently.
• the weakened area has been formed by reducing the area moment of inertia of the cross section perpendicular to the longitudinal axis of the link in a portion of the supporting link.
• the weakened area could be formed in that the material properties in a certain portion of the link could be different from the rest of the link. This could for example be achieved by changing the chemical structure of the material in a certain area of the link, for example by heat treatment. It could also be achieved by assembling the supporting link from different materials.
• the link could be formed from a composite material wherein the structure of the composite material is different at the weakened area. For example, if the link where made from woven glass fibres in an epoxy mix, the amount of glass fibres could be reduced at the weakened area.
• a weakened area near to the fastener which has a cross section with a smaller area moment of inertia than the cross section of the area at the through hole, would allow the link to deform mainly at the weakened area, thus reducing the risk of the linkage mechanism failing.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Wing Frames And Configurations (AREA)
• Toys (AREA)
• Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
• Mechanical Control Devices (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Vehicle Body Suspensions (AREA)
• Steering Control In Accordance With Driving Conditions (AREA)
• Dowels (AREA)
• Dry Shavers And Clippers (AREA)
• Pivots And Pivotal Connections (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

ID=37308776

Family Applications (1)

Country Status (7)

Cited By (3)

Citations (4)

• 2006
  • 2006-02-21 AT AT06706073T patent/ATE438013T1/de active
  • 2006-02-21 DE DE602006008189T patent/DE602006008189D1/de active Active
  • 2006-02-21 DK DK06706073T patent/DK1989382T3/da active
  • 2006-02-21 EP EP06706073A patent/EP1989382B1/de active Active
  • 2006-02-21 PL PL06706073T patent/PL1989382T3/pl unknown
  • 2006-02-21 WO PCT/DK2006/000102 patent/WO2007095941A1/en active Application Filing
• 2008
  • 2008-09-19 NO NO20084001A patent/NO20084001L/no not_active Application Discontinuation

Patent Citations (4)

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