EP1696094A2 - Ressort d'équilibrage - Google Patents

Ressort d'équilibrage Download PDF

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Publication number
EP1696094A2
EP1696094A2 EP06251019A EP06251019A EP1696094A2 EP 1696094 A2 EP1696094 A2 EP 1696094A2 EP 06251019 A EP06251019 A EP 06251019A EP 06251019 A EP06251019 A EP 06251019A EP 1696094 A2 EP1696094 A2 EP 1696094A2
Authority
EP
European Patent Office
Prior art keywords
spring
spring balance
gear
sliding sash
adjustment
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.)
Withdrawn
Application number
EP06251019A
Other languages
German (de)
English (en)
Other versions
EP1696094A3 (fr
Inventor
David Anthony Wellman
Peter James Harrison
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.)
J Banks and Co Ltd
Original Assignee
J Banks and Co Ltd
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 J Banks and Co Ltd filed Critical J Banks and Co Ltd
Publication of EP1696094A2 publication Critical patent/EP1696094A2/fr
Publication of EP1696094A3 publication Critical patent/EP1696094A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/10—Counterbalance devices
    • E05D13/12—Counterbalance devices with springs
    • E05D13/1207—Counterbalance devices with springs with tension springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
    • E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
    • E05D13/04—Fasteners specially adapted for holding sliding wings open
    • E05D13/08—Fasteners specially adapted for holding sliding wings open acting by friction for vertically sliding wings
    • 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
    • E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
    • E05D15/22—Suspension arrangements for wings for wings sliding vertically more or less in their own plane allowing an additional movement
    • 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

  • This invention relates to a spring balance, and in particular to a spring balance for use with a sliding sash window.
  • orientational and directional terms such as “vertical”, “top”, “bottom” etc. refer to the normal orientation of use of the components described (as shown for example in Fig.3), but the invention places no limitations upon the orientation of the spring balances in use.
  • Sliding sash windows comprising two or more window panels, at least one of which can slide in a vertical direction in use to open and close the window, have been in long term and widespread use. During sliding movement, it is necessary for the user to overcome the frictional resistance to movement caused by engagement of the sliding window panel or sliding sash with the channel in which it moves, and also to support the weight of the sliding sash.
  • Counterweights have to large extent been replaced by spring balances which utilise one or more springs, and which generate a spring force to seek to counterbalance some or all of the weight of the sliding sash.
  • Spring balances use a tension spring which is connected at its top to the frame and at its bottom to the sliding sash. Downwards movement of the sliding sash causes the tension spring to extend, providing a return force which will support some or all of the weight of the sliding sash and also assist the user when moving the sliding sash upwardly.
  • a tension spring varies with extension of the spring, a second spring is used so that the resultant return force provided by both springs is more uniform over the range of movement of the sliding sash.
  • the second spring is typically a helical torsion spring which is held at one end and with the "free" end being forced to rotate as the sliding sash is moved.
  • Rotation of the free end of the torsion spring is usually effected by a spiral rod which is connected to the sliding sash and which is caused to move through a follower bush carried by the free end of the torsion spring, the follower bush converting the relative axial movement of the spiral rod into rotation of the free end of the torsion spring.
  • a spring balance is disclosed for example in GB patent 819,094.
  • the return force can be made more uniform throughout the range of movement of the sliding sash by adjusting the pitch of the spiral rod along its length, i.e. the rate of rotation of the torsion spring can be made dependent upon the extension of the tension spring.
  • Spring balances are usually adjustable, i.e. the amount of tension in the tension spring and/or the amount of torsion in the torsion spring can be adjusted. This allows the return force provided by the spring balance to be adjusted to match the weight of the particular sliding sash to which it is fitted, and also to ensure that the return force is maintained as desired over the lifetime of the spring balance, during which lifetime the return force provided by the tension spring and/or the torsion spring may reduce.
  • the adjustment is typically effected by varying the preload upon the torsion spring.
  • the spring balance of GB 819,094 is adjustable by way of rotating the "free" end of the torsion spring, i.e. the bottom end of the torsion spring, relative to the tension spring, by way of the spiral rod. In practice, this requires the bottom of the spring balance to be disconnected from the sliding sash so that the necessary access can be gained to rotate the spiral rod.
  • the return force is usually set to its minimum so that the assembler or installer can increase the return force to that necessary to match the weight of the particular window being fitted.
  • spring balances allow adjustment in one direction only, i.e. they employ a ratchet mechanism or the like allowing the return force to be gradually increased, both initially to match the weight of a particular sliding sash to which the spring balance is to be fitted, and also to counteract any reduction in return force over the lifetime of the spring balance.
  • the spring balance is over-adjusted, i.e. the return force is made too great, it is often necessary completely to dismantle the spring balance in order to reduce the spring force, e.g. to set the return force at its minimum once again.
  • UK patent application 2,262,123 discloses a spring balance having a tension spring and a torsion spring, in which the adjustment is effected at the bottom, i.e. at the connection to the sliding sash.
  • the return force is increased by way of a ratchet mechanism, and this document discloses means of deactivating the ratchet mechanism if it is necessary or desired to decrease the return force.
  • UK patent application 2,373,813 discloses a spring balance having a tension spring and a torsion spring, in which adjustment is effected by way of a gearbox connected to the top of the spring balance.
  • the spring balance disclosed in this document has the significant advantage that adjustment can be effected in situ, i.e. without disconnection or removal of the spring balance or the sliding sash.
  • the top of the tension spring is fixed securely to a bracket at the top of the spring balance, which bracket is fixed to the window frame.
  • the bottom of the tension spring carries a block which is connected to the sliding sash and to which the bottom of the torsion spring is also fixed.
  • the top of the torsion spring carries the follower bush through which the spiral rod passes.
  • the top of the spiral rod is fixed to the gearbox at the top of the spring balance.
  • the bottom of the tension spring is pulled downwardly by way of the block connected to the sliding sash.
  • the torsion spring is also pulled downwardly by the block, and the top of the torsion spring is caused to rotate as the follower bush moves (downwardly) along the spiral rod.
  • Adjustment of the spring balance of GB 2,373,813 is effected by rotation of the gearbox which causes the top of the spiral rod to rotate, which in turn rotates the top of the torsion spring. Since the bottom of the torsion spring cannot rotate this adjustment affects the preload of the torsion spring and thus the return force of the spring balance.
  • the disclosed spring balance has a significant disadvantage. Specifically, adjustment is effected by rotation of a gear which has a hexagonal head and which is located in a hexagonal opening in the gearbox housing. To effect adjustment the hexagonal head must first be pressed inwardly (against the force of a biasing spring), usefully by a screwdriver, to release the hexagonal head from the hexagonal opening, whereupon the gear can be rotated as desired. However, when the adjustment has been completed the hexagonal head must be aligned with the hexagonal opening before the screwdriver is removed, so that the gear is prevented from rotating.
  • a spring balance comprising a top assembly which is secureable to a frame member, a bottom assembly which is secureable to a sliding sash, a tension spring connected to the top assembly and to the bottom assembly, a torsion spring, a spiral rod, and a follower bush interconnecting the spiral rod and the torsion spring, the spring balance being adjustable by way of a gearbox within the top assembly, the gearbox having a ratchet mechanism and an over-ride mechanism, the ratchet mechanism permitting adjustment of the spring balance to increase the preload, and the over-ride mechanism allowing the ratchet mechanism to be disabled and allow a reduction in the preload.
  • the spring balance will usually be supplied to the installer with the preload set at its minimum (i.e. with substantially no torsion in the torsion spring).
  • the preload can be increased as desired. If, however, the preload is increased too much, the over-ride mechanism can be operated and the ratchet mechanism disabled allowing the preload to be reduced as desired.
  • ratchet mechanism It is a particular benefit of a ratchet mechanism that the amount of adjustment can be readily measured, i.e. the number of "clicks" of the ratchet mechanism can be counted and it can be ensured that the adjustment of both spring balances of each window are matched.
  • the ratchet mechanism comprises a spring-biased plunger which can engage in a number of recesses in a gear of the gearbox.
  • the plunger and the recesses have tapered engagement surfaces and the recesses are preferably in the form of saw teeth.
  • the over-ride mechanism comprises a peg connected to the plunger and by which the plunger can be moved to release the plunger from the respective recess.
  • a spring balance comprising a top assembly which is secureable to a frame member, a bottom assembly which is secureable to a sliding sash, a tension spring connected to the top assembly and to the bottom assembly, a torsion spring, a spiral rod, and a follower bush interconnecting the spiral rod and the torsion spring, the spring balance being adjustable by way of a gearbox within the top assembly, the gearbox having a limit mechanism for limiting the maximum preload.
  • the limit mechanism is a threaded member threadedly mounted to a gear of the gearbox, the threaded member moving axially as the gear rotates.
  • the threaded member engages a part of the gearbox housing to limit its axial movement, and therefore limit the rotation of the gear.
  • the rotation of the gear can be limited as desired.
  • the torsion spring can accommodate a certain number (e.g. fifteen) rotations as adjustment (in addition to the rotations undergone during movement of the window), and it can readily be arranged that the limit mechanism can allow only that number of rotations during adjustment.
  • the torsion spring is connected to the top assembly and the spiral rod is connected to the bottom assembly, and the gearbox is connected directly to the torsion spring. Accordingly, the preload of the spring balance is adjusted by way of a direct connection between the gearbox and the torsion spring, and not indirectly by way of the spiral rod (as in GB 2,373,813).
  • the bottom assembly includes a pivoting mounting for the sliding sash, and a braking mechanism controlled by the pivoting mounting.
  • the braking mechanism includes a cam engageable with the walls of the channel within the frame.
  • the bottom assembly includes a mounting bracket for securement to a sliding sash.
  • the mounting bracket carries a pivoting stay.
  • one end of the pivoting stay is connected to the mounting bracket and the other end of the pivoting stay is connectable to a slide member.
  • the slide member lies within the channel of the frame and moves towards the bottom assembly during pivoting of the sliding sash. Movement of the slide member is limited so as to define the limit of pivoting movement of the sliding sash.
  • the mounting bracket for the sliding sash would be sold separately to the remainder of the spring balance for assembly on site, since it was necessary to gain access to the bottom assembly for adjustment of the spring balance.
  • the link and the slide member are typically sold loose and assembled to the window as the window is assembled. The requirement for additional assembly is onerous but necessary because of the method of adjustment of these spring balances.
  • the inventors have realised that by providing the adjustment at the top assembly, much or perhaps all of the componentry of the spring balance can be pre-assembled so reducing the number of separate components supplied to the window assembler and requiring assembly with the window.
  • the mounting bracket for the sliding sash and the stay can be pre-assembled with the remainder of the spring balance.
  • the slide member can also be pre-assembled, so that all of the components of the spring assembly are pre-assembled and sold together as a single unit for installation by the window assembler. This has clear benefits for the window assembler, and also for the spring balance manufacturer who is better able to ensure completeness of the spring balances as sold.
  • the top assembly and the bottom assembly each include two housing parts which are separable. This allows fitment of respective components into one or other of the housing parts before the other housing part is fitted and secured and the components are retained therein.
  • the window 10 has a frame 12 and two window panels 14, 16.
  • the (bottom) window 16 is a sliding sash and the (top) window 14 is fixed, but it will be understood that in other sliding sash windows the top window 14 could (also or alternatively) be a sliding sash.
  • the frame 12 provides a pair of opposed channels (not shown) within which the sliding sash 16 can slide.
  • a spring balance 20 is located in each of the channels, and each spring balance 20 is connected to the frame 12 and to the sliding sash 16.
  • the spring balance 20 is shown in exploded view in Fig.2, and comprises a top assembly 22, a bottom assembly 24, a tension spring 26, a torsion spring 30 (only parts of the tension spring 26 and torsion spring 30 are shown in Fig.2), a spiral rod 32 and a follower bush 34.
  • the top assembly 22 is secureable to a part of the frame 12 by way of a screw or other fixing passing through the hole 40.
  • the bottom assembly 24 is secureable to the sliding sash 16 by way of a mounting bracket 42 which has holes 44 for receiving screws or other fixings and by means of which the mounting bracket can be secured to the sliding sash 16.
  • the tension spring 26 is connected to the top assembly 22 by way of a collar 46, and to the bottom assembly 24 by way of a boss 50.
  • the collar 46 and the boss 50 are preferably slightly tapered and have a terminal diameter significantly greater than the free diameter of the (helically wound) tension spring 26, so that it is necessary to force (or force and rotate) the tension spring 26 onto the collar 46 and boss 50. Thereafter, the resilience of the material of the tension spring 26 will retain the ends of the tension spring in place in the presence of the applied tensile forces.
  • the torsion spring 30 is connected to the top assembly 22 by way of boss 52 which lies inside the collar 46.
  • the spiral rod 32 is connected to the bottom assembly 24 by way of an opening 54 which receives the "L"-shaped end 56 of the spiral rod 32.
  • the follower bush 34 is connected to the end of the torsion spring 30 by way of a boss 60, the bush having a slot opening 62 formed therethrough and through which is passed the spiral rod 32.
  • the bosses 52 and 60 are preferably slightly tapered and have a terminal diameter significantly greater than the free diameter of the (helically wound) torsion spring 30, so that it is necessary to force (or force and rotate) the torsion spring 30 onto the respective bosses 52 and 60. Thereafter, the resilience of the material of the torsion spring 30 will retain the ends of the torsion spring in place in the presence of the applied torsional forces. In addition, and as seen in Fig.4. the end of the torsion spring is clamped between the boss 52 and the inside of the collar 46.
  • the spring balance 20 is adjustable by way of the top assembly 22, specifically by way of gears 64 and 66.
  • the boss 52 which is connected to the end of the torsion spring 30 is an extension of the gear shaft 70 of the gear 66.
  • the gears 64, 66 have cooperating teeth 72, 74 respectively and operate to drive the gear shaft 70 of the gear 66 about an axis parallel to (and in this embodiment coincident with) the longitudinal axis A-A of the spring balance 20, whilst the gear shaft 76 of the gear 64 rotates about an axis B-B which is substantially perpendicular to the axis A-A.
  • the gear 66 also has a number of detent notches 80 which are engageable by a latch 82, the latch 82 being biased by compression spring 84 into engagement with a detent notch 80.
  • the form of the detent notches 80 and latch 82, and the presence of the compression spring 84, provide a ratchet mechanism which resists movement of the gear 66 in one direction (i.e. clockwise as viewed in Fig.2), but allows movement in the other direction (i.e. anti-clockwise as viewed in Fig.2).
  • the gear 66 in this embodiment has four detent notches 80 which define four retention positions for the ratchet mechanism for each rotation of the gear 66, though there could be more or fewer than four detent notches in other embodiments.
  • the gear 64 is rotated by way of a screwdriver or the like inserted into its slot 86 (Figs. 3 and 4).
  • the gear 64 can be rotated anti-clockwise and during this rotation the gear 66 will also rotate, with the latch 82 being driven out of its detent notch 80 (so compressing the compression spring 84), along the underside of the gear 66, and into the next detent notch 80.
  • ratchet mechanisms such as that described that the user will be able to hear and feel the latch 82 entering the detent notches 80 and so can measure the adjustment being made. The user can use the measurement obtained to ensure that the same adjustment is made to the spring balance 20 at the other side of the sliding sash 16.
  • the spring balance 20 is over-adjusted it is desirable to provide a means for disabling the ratchet mechanism, to permit the user to correct the over-adjustment.
  • this is provided by the arm 90 of the latch 82, which arm is movable manually downwardly as viewed to compress the spring 84 and release the latch 82 from its detent notch 80.
  • a screwdriver or the like is fitted into the slot 86 before the ratchet mechanism is disabled, so that the pre-load in the torsion spring 30 can be released gradually.
  • a user could for example release the ratchet mechanism and rotate the gear 64 through two complete revolutions, before enabling the ratchet mechanism once more and completing the adjustment operation. Such controlled adjustment could easily be replicated for the other spring balance of the sliding sash.
  • the top assembly 22 includes two housing parts 92, 94 which in this embodiment are plastic mouldings and which can be secured together by pegs 96.
  • the housing parts 92, 94 define the chambers within which lies the gearbox comprising the gears 64, 66, peg 82 and spring 84.
  • the housing parts 92, 94 also define the boss 52 and the collar 46.
  • the bottom assembly 24 comprises two housing parts 100, 102 which in this embodiment are plastic mouldings and which can be secured together by pegs 104.
  • the housing parts 100, 102 define the chambers within which lie a spindle 106 and a cam 110.
  • the spindle 106 is secured to the mounting bracket 42 so as to pivot therewith during tilting of the sliding sash 16.
  • the top of the sliding sash 16 can be disconnected from the channel in the frame 12 so that the top of the sliding sash 16 can be tilted (inwardly of the room or building) to allow the user to clean the normally outside surface of the sliding sash 16.
  • top assembly and the bottom assembly comprise metallic housing parts, usefully die-castings.
  • the spindle 106 rotates as the mounting bracket 42 is tilted, and drives the cam 110 to rotate into clamping engagement with the channel.
  • the cam 110 is caused to rotate until it projects beyond the periphery of the housing parts 100, 102, and it is arranged that in this position the cam 110 engages the channel and prevents movement of the sliding sash 16 relative to the channel.
  • the mounting bracket 42 can be assembled to the spindle 106 during manufacture of the spring balance, and can therefore be substantially permanently secured thereto.
  • a stay 112 which pivots relative to the mounting bracket during tilting of the sliding sash 16.
  • the other end of the stay 112 is connected to a slide member (not shown), which is movably mounted within the channel of the frame 12 and can slide upwardly and downwardly in the channel as the sliding sash is tilted.
  • the slide member can have a limited range of movement to limit the tilting range of the sliding sash. It can be arranged that the stay 112 and the slide member are also assembled to the spring balance 20 during its manufacture, so that the window assembler receives a single component for fitment to a sliding sash window.
  • the slide member is provided separately from the remainder of the spring balance, and be mounted into the channel separately from the spring balance. Even in such embodiments, however, there are only two components supplied to the window assembler, and the window assembler is required only to connect the stay 112 to the slide member, which is far less complicated and time consuming than the assembly required for prior art spring balances.
  • Figs. 6-8 show the components of a second embodiment of top assembly 222. Whilst only the top assembly 222 is shown in Figs. 6-8, it will be understood that this top assembly 222 can used with the bottom assembly 24, tension spring 26, torsion spring 30, spiral rod 32 and follower bush 34 of the embodiment of Figs. 2-5, instead of the top assembly 22 shown in those figures.
  • the embodiment of Figs. 6-8 include a limit mechanism to limit the available adjustment of the spring balance, and it will be understood that a similar limit mechanism could be incorporated into the top assembly 22 of Figs. 2-5.
  • the top assembly comprises two housing parts 292 and 294 which together house the other components, and which together provide a collar 246 to receive the top end of a tension spring (not shown) such as 26.
  • the top assembly carries gears 264 and 266 which can cooperate to convert rotation of the gear 264 about a substantially horizontal axis into rotation of the gear 266 about a substantially vertical axis.
  • the gear 266 has a boss 252 which can receive the top end of a torsion spring (not shown) such as 30.
  • the gear 264 has a recess 201 which can receive a screwdriver or the like, by which rotation may be imparted to the gears 264 and 266 so as to rotate the top end of the torsion spring and adjust the preload in the spring balance.
  • the recess 201 is accessible through the opening 203 in the housing part 294.
  • the underside of the gear 266 has a number of recesses 205 which can receive the plunger or latch 282.
  • the number of recesses can be determined as desired, with more recesses being more complex but offering greater sensitivity during adjustment. It is understood that most spring balances are adjustable in half-rotations of the end of the torsion spring, so that embodiments with two recesses 205 are presently preferred.
  • a compression spring is provided to bias the plunger 282 upwardly (as drawn) into engagement with the gear 266.
  • the recesses 205 are in the form of saw teeth, and the engaging surface of the plunger 282 is similarly shaped. This ensures that as the gear 266 is rotated in one direction (by way of the gear 264) the plunger 282 is caused to move out of a recess 205, along the bottom of the gear 266 and into the other recess 205, repeatedly. However, movement in the other direction is prevented.
  • the plunger 282 and recesses 205 therefore act as a ratchet mechanism allowing movement of the gear 266 in one direction only (i.e. with the gear 264 being rotated in a clockwise direction as shown in Fig.8).
  • the ratchet mechanism will issue an audible "click" so that the number of half-rotations of the gear 266 can be readily measured by counting the "clicks”, and the same adjustment can be effected on both spring balances of a particular window.
  • the ratchet mechanism permits rotation of the gear 266 in the direction which increases the preload of the spring balance. If the preload is desired to be reduced, however, the ratchet mechanism can be over-ridden by manual depression of the plunger 282 by way of the arm 290 which projects through the opening 207 in the housing part 294.
  • the top assembly 222 includes a limit mechanism in the form of a threaded bolt 209 which locates into a threaded bore 211 in the second gear 266.
  • the housing part 292 has two flat surfaces 213 which are spaced by a distance similar to the lateral dimension of the head 215 of the bolt 209, so that the head 215 can slide in an axial direction between the surfaces 213, but the surfaces 213 prevent rotation of the bolt 209.
  • Part of the bolt head 215 is removed (at 217) to allow the bolt head 215 to pass the first gear 264 (see Fig.7).
  • the bolt 209 can move axially within the housing part 292 between an extreme position in which it is fully received in the bore 211 (and the underside of the head 215 engages the top of the gear 266) and another extreme position in which the top of the head 215 engages the surface 219 at the top of the housing part 292.
  • the bolt 209 is caused to move axially up and down depending upon the direction of rotation of the gear 266.
  • the pitch of the threads on the bolt 209 and bore 211, and the length of the chamber within which the bolt 209 can move, are chosen to determine the maximum number of rotations of the gear 266 which are available.
  • the spring balance will be supplied with the minimum preload, and with the bolt 209 at one end of its range of axial movement. Adjustment of the spring balance will both increase the torsion in the torsion spring and cause the bolt 209 to move towards the other end of its range of movement.
  • the openings 203 and 207 in the housing part 294 are covered in use by an optional cover plate 219.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hinge Accessories (AREA)
  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
EP06251019A 2005-02-26 2006-02-25 Ressort d'équilibrage Withdrawn EP1696094A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0504026A GB0504026D0 (en) 2005-02-26 2005-02-26 Spring balance

Publications (2)

Publication Number Publication Date
EP1696094A2 true EP1696094A2 (fr) 2006-08-30
EP1696094A3 EP1696094A3 (fr) 2007-01-24

Family

ID=34430287

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06251019A Withdrawn EP1696094A3 (fr) 2005-02-26 2006-02-25 Ressort d'équilibrage

Country Status (2)

Country Link
EP (1) EP1696094A3 (fr)
GB (1) GB0504026D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047121A1 (fr) * 2006-10-18 2008-04-24 Sashmatic Limited Appareil pour lever et baisser une charge
GB2463985A (en) * 2008-10-02 2010-04-07 Caldwell Mfg Co Apparatus and method for cancelling opposing torsional forces in a compound balance.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373813A (en) * 2001-03-10 2002-10-02 Pomeroy Inc Window balance

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373813A (en) * 2001-03-10 2002-10-02 Pomeroy Inc Window balance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008047121A1 (fr) * 2006-10-18 2008-04-24 Sashmatic Limited Appareil pour lever et baisser une charge
GB2463985A (en) * 2008-10-02 2010-04-07 Caldwell Mfg Co Apparatus and method for cancelling opposing torsional forces in a compound balance.
US8146204B2 (en) 2008-10-02 2012-04-03 Caldwell Manufacturing Company North America LLC Apparatus and method for canceling opposing torsional forces in a compound balance
US8302258B2 (en) 2008-10-02 2012-11-06 Caldwell Manufacturing Company North America, LLC Apparatus and method for canceling opposing torsional forces in a compound balance
GB2463985B (en) * 2008-10-02 2014-05-07 Caldwell Mfg Co Apparatus and method for cancelling opposing torsional forces in a compound balance

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Publication number Publication date
EP1696094A3 (fr) 2007-01-24
GB0504026D0 (en) 2005-04-06

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