CA2113676C - Locking slide block - Google Patents
Locking slide blockInfo
- Publication number
- CA2113676C CA2113676C CA 2113676 CA2113676A CA2113676C CA 2113676 C CA2113676 C CA 2113676C CA 2113676 CA2113676 CA 2113676 CA 2113676 A CA2113676 A CA 2113676A CA 2113676 C CA2113676 C CA 2113676C
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- CA
- Canada
- Prior art keywords
- sash
- spring
- pivot
- slide block
- sash pivot
- 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.)
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Abstract
The present invention is directed to a locking slide block for slidably and pivotably mounting a window sash to a side member of a window frame having a vertical jamb channel. The locking slide block has a housing with oppositely disposed sliding surfaces for guiding the housing in the jamb channel. Operably connected to the housing is a locking means for selectively engaging the jamb channel and locking the housing in a fixed position, and a cam for selectively operating the locking means. A sash pivot operatively connected to the cam is operably connectable to the sash. The housing also has a sash pivot retainer spring. A
retaining means is utilized to protect a free second end of the retainer spring from bowing and deforming due to forces applied to the window sash in operation.
retaining means is utilized to protect a free second end of the retainer spring from bowing and deforming due to forces applied to the window sash in operation.
Description
LOCKI~G SLID~ BLOCK
Fi~ld of tho Invention This invention generally relates to a locking slide block for double-hung tilt-out type windows.
R~c~,.o~nd of the In~ention Double-hung, tilt-out type windows have become increasingly popular. Much of this popularity is due to the tilt-out feature which allows both inside and outside surfaces of the window to be cleaned from the inside.
Tilt-out windows have been equipped with locking slide blocks 3uch as the one disclosed in U.S. Patent No. 4,610,108 to Marshik. Marshik discloses a double-hung window having a frame with a set of parallel jamb channels on opposite sides of the frame. Within each jamb chAnnel is a slidably mounted locking block. A
spring counter-b~l~nce --hAni~ is attached to a ~ -headplate on each block. A pivot extends from proximate the lower end of opposite sides of a sash into a locking cam housed within the block. The pivots allow the sash, which holds a window pane, to be rotated or tilted toward the inside. As the pivots rotate, the cam forces 25 serrated ends of a spring into opposite sides of the -~;' ~amb channel to p.~v~nt the counter-balance spring from pulling up the blocks and sash while cleAning.
U.S. Patent No. 4,813,180 to Scalzi discloses another locking sliding block for double-hung windows.
Like the '108 patent, a locking block is slidably mounted within iamb channels and a pivot extends from opposite sides o~ the sash into a pivot button or cam in each locking block. Unlike the '108 patent, ho eVel~
the pivot has a slot which engages a retAining ridge in ~ ;~
35 the pivot button. This is intended to prevent -dislocation of the pivots during transport and installation of the window due to deflection or bowing ~ of the frame away from the sash. The locking block -~ disclosed by Scalzi, although allowing the sash to pivot 21~'3~7~ :
inside for easy cleaning of the window pane, does not allow the window to be conveniently 1~ ved from the inside.
S Summary of the I~ve~tlon The invention addresses many of the problems associated with the prior art in providing a locking -slide block which enables the sash of a double-hung, ~' tilt-out type window to be tilted to the inside to ;-facilitate the cleaning, insertion and removal of the window sash and panes from a window frame. A sash pivot retA;n1ng sprinq configuration is utilized thereon to provide reliable, simple and relatively effortless ~ ~-operation of a locking slide block during shipping and 15 installation, as well as in normal use. ';
In accordance with the invention, a locking slide - block is provided for slidably and pivotably mounting a ~:
window sash to a side member of a window frame having a vertical ~amb channel with oppositely disposed sides.
20 The block has a housing with oppositely disposed sliding ;~ -~
surface~ for ~l;~ing the housing in the jamb chAnnel.
Within the block is a locking mean~ for selectively engaging the oppositely dispo~ed sides of the ~amb ~ ;
~hAnngl to lock the block in a fixed position relative to the ~amb ch~nn~l. A c~m is disposed within the housing. The cam has at least one camming surface which selectively operates the locking means. The cam also has a sash pivot opsn;ng with an open top slot, for att~ch; ng a sash pivot thereto. Sash pivots are 30 operatively connectable to each lower opposite side of a ~;
sash, for operatively connecting the sash to the cam. i~
The lock; ng slide block also has a sash pivot retainer spring having a first end operatively connected to the housing and a second end proximate the cam. The ~
35 second end has a first position for allowing the sash ~-pivot to be inserted or 1~- ~ved from the sash pivot opening through the open top slot. The second end also ~: -7 ~
has a second pesition for preventing removal of the sash pivot through the open top slot. The second end is normally biased to the second position, and may be depressed to the first position.
The locking slide block also preferably includes a second end ret~;ning means. The second end ret~ining means is operatively connected to the housing, and it operates to restrict .~v~- - t of the second end of the retainer spring past the second position in a direction opposite that of the first position. This protects the ~econd end from deforming due to forces applied to the window sash in operation, and thus increases the overall reliability of the slide block. ~-In a preferred embodiment, the second end ret~ining means utilizes at least one spring retaining flange which extends across a portion of ~ spring receiving ;~
recess to cooperatively about the second end of the spring in its second position. Further, cooperative fl~ngeg may algo be utilized on the retainer spring to facilitate this abutting relationship between the spring and the spring retAining flange.
These and other advantages and features, which characterize the invention, are pointed out with particularity in the claims AnneYe~ hereto and fo lng a part hereof. HoireveL, for a better underst~n~i ng of the invention, its advantages and ob~ectives attAine~ by its ;~
u~e, reference should be made to the drawing which forms a further part hereof and to the acc~ ~onying descriptive matter, in which there is described a preferred ~ ~3~i -nt ofithe invention.
Brief Description of the Drawinqs FIGURE 1 shows a double-hung window with a partially tilted sash.
FIGURE 2 shows an exploded perspective view of a locking slide block with sash pivot consistent with the invention, for use in the double-hung window in Figure ~ ;
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: 2 1 ~ 3 6 7 ~
FIGURE 3 shows an assembled locking slide block ~' without sash pivot consistent with the invention.
FIGURE 4 shows a pexspective view of the sash pivot. ~-~
FIGURE 5 shows a locXing slide block in an unlocked position in a jamb channel.
FIGURE 6 shows a locking slide block in a locked position in a ~amb channel.
FIGURE 7 shows a mirror image of the locking slide -block of Figure 5. ;~
FIGURE 8 shows parallel jamb channels, one with a counter-bAI~n~e spring cover and the other having a ~ ;;' locking slide block with sash pivot.
FIGURE 9 shows a cross-section of the locking slide block shown in Figure 6. -~
FIGURE 10 shows an exploded perspective view of an alternative housing and retaining spring consistent with '~ ,' the invention.
FIGURE 11 shows a perspective view of an assembled locking slide block without sash pivot, and with the ;;~
housing and retAining spring of Figure 10.
De~s~le~ Doscription of the Preferred '~ L
Referring now to the drawing, wherein like , referenced numeral~ designate identical or corresponding 25 parts throughout the ~everal views, Figure 1 shows a ", double-hung tilt-out window 10. The window 10 has a ''' frame 12 and an upper sash 14 and a lower sash 16 supporting window panes 15 and 17, respectively. The frame 12 also has four ~amb channels 18, one of which i8 30 shown in~Figure 1,, on a,~ide - ~or 13 of f,rame 12. One ~ ' ~amb chAnnel is proximate opposite sides of the upper ~a~h 14, and one is proximate opposite sides of lower sash 16. As shown in Figure 1, the lower sash 16 is partially tilted 60 that both sides of the window pane 17 within the lower sash 16 are accessible for cle~ning from the same side of window 10.
Figure 2 shows an exploded view of a locking slide 21~3~
block, generally referred to as 20, and sash pivot 22 of -the present invention. One locking slide block 20 i8 slidably mounted within each jamb channel 18. Fastened ~ -to lower opposite sides of each sash 14 and 16 is one ~-sash pivot 22~ These sash pivots 22 are supported for rotation by the locking slide blocks 20. Each sash is tiltable about a longitll~in~l axis through pivots 22 disposed on opposite sides of sashes 14 and 16.
As shown in Figure 2, locking slide block 20 has a 10 housing 24, preferably of rigid plastic. This housing -24 has sliding surfaces 25 with slots 27. The housing 24 has an aperture 49 and a plate groove 51 for attaching a sash pivot retainer spring 26 and a metal plate 28, respectively. A counter-balance spring (not shown) is attached to metal plate 28. The housing 24 ha~ a circular ch~nnPl 30, which extends into housing 24 generally parallel to sli~;n~ surfaces 25, for receiving ~ ;
a locking cam 32 having cr ing surfaces 31. Housing 24 also has a box-like area for receiving locking spring 34 which has serrated end portions 35. Locking cam 32 has a head 35 which, as known to those skilled in the art, retains spring 34 in the box-like area of housing 24.
Sash pivot retainer spring 26, as shown in Figure 2, has a hooke~ first end 48 which is received by aperture 49 to operably connect retainer spring 26 to housing 24.
Retainer spring 26 also has a free end 50. Retainer spring 26 is preferably constructed of spring steel.
Locking cam 32, a~ ~hown in Figure 2, has a sash pivot opening 33 with an open top slot 37. Located proximate a front side of locking cam 32, on opposite sides of sash pivot openi ng 33 are inwardly disposed cam fl~nges 39.
Figure 3 shows a per~pective view of the assembled locking slide block 20 without sash pivot 22. Retainer ~ ~;
spring 26 and plate 28 are shown installed within housing 24. Free end 50 of spring 26 is in a normal position proximate the front side of locking cam 32.
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Locking cam 32 is shown inserted within circular channel 30, and is retained within block 20 by a tab 38. Figure 3 also shows one serrated end portion 35 of spring 34 retracted within slot 27 in sliding surface 25. : ~
Figure 4 is a front view of sash pivot 22 having ;
oppositely disposed flanges 21 at one end of an :~
elongated portion 29, and a back 23. Sash pivots 22 are ;;
fastened to the lower opposite sides of sashes 14 and 16 so that the lengthwise axis of back 23 is parallel to the lengthwise axis of the sash side.
Figure 5 shows loeking slide block 20 inserted in ~amb channel 18 having sides 40. Sliding surfaces 25 of sliding loeking block 20 are proximate side 40 of jamb channel 18. Loeking slide block 20 is held within jamb ehannel 18 by a flexible raised ~amb channel face 42 having opening 44.
As shown in Figure 6, the serrated portions of ~ .
spring 34 are engaged with sliding surfaces 25 to prevent the eounter-bAl~n~e spring from pulling locking ~ '.. ;.
slide bloek 20 and sash 14 or 16 upward when sash 14 or 16, respeetively, is tilted. When sash 14 or 16 and, thus baek 23, is rotated from vertieal, locking cam 32 rotates 80 that cr ~g surfaees 31 force serrated end portions 35 of ~pring 34 out slots 27. In Figure 6, back 23 i8 tilted to a horizon'cal po~ition at applo~imately 90~ to ~amb channel 18. This position al~o corresponds to sash 14 or 16 tilted at 90~ to jamb chAnnel 18.
Also shown in Figure 6, sash pivot 22 is operably eonneeted to locking cam 32 by rotating cam 32 (by a tool not shown) so that open top slot 37 opens upward beneath retainer spring 26. Sash pivot 22 is inserted into ~ash pivot openi ng 33 by depressing the free end 50 of retainer spring 26 inwardly away from the front side 35 of locklng cam 32 to a first depressed position. After :~
sash pivot 22 i~ inserted in sash pivot opening 33, the -~
free end of retainer spring 26 moves baek to a nc~
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7 . ~:~
second position over opening 33. Once retainer spring ;~
26 moves back over opening 33, sash pivot 22 cannot slip ~:
out of opening 33. Without retainer spring 26, sash ~ :
pivot 22 might slip out of opening 33 when sash 14 or 16 :~
5 is tilted. :
As best shown in Figure 9, a cross-sectional view of cam 32 and sash pivot 22 taken from Figure 6, when sash pivot 22 is inserted into sash pivot opening 33, the ~.
elongated portion 29 extends into the op~ning beyond cam flanges 39. Flanges 21 of sash pivot 22 are disposed widely enough that when sash pivot 22 is inserted in this onner~ flanges 21 engage with cam flanges 39 so that sash pivot 22 cannot be pulled out of the pivot :;~
opening in a direction proximately parallel to a 15 longitl-~;n~l axis of the elongated portion 29. This ::
feature is particularly important during transport and installation of window 10. During transport and installation, side members 13 of frame 12 may bow outwardly away from sashes 14 and/or 16 so that without the engagement of flanges 21 with cam flanges 39, elongated portion 29 of sash pivot 22 could be pulled out of sash pivot opening 33.
Figure 7 shows back 23 of sash pivot 22 oriented vertically. This position of back 23 corresponds to the 25 closed or vertical position of sash 14 or 16. Serrated ~:
end portions 35 of spring 34 are not engaged with sides 40 of ~amb c~An~el 18. Locking slide block 20 and sash 14 or 16 is thus free to slide vertically within ~amb -~
c~nn~l 18. The counter-h~lAnce spring tnot shown) attached to plate~28 assists in sliding locking slide blocks 20 and sashes 14 or 16 upward in jamb channels 18.
~: Figure 8 show~ a cross-~ectional view of parallel ~amb channels 18. In one of the jamb channels 18 is ~ ~.
shown locking slide block 20 without serrated end portions 35 of spring 34 exten~ing beyond sides 25 of locking slide block 20. As previously shown in Figure :' ,, ' ':;:
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8 2~13~
7, back 23 of sash pivot 22 is positioned vertically.
Flexible jamb channel ~ace 42 is engaged with a sash groove 46 to retain sash 16 vertically within frame 12 (not shown).
Figures 10 and 11 show an alternative embodiment of the locking slide block consistent with the invention.
It has been di~covered that in certain instances, forces applied to a sash may be applied by a sash pivot to the retainer spring in a locking slide block, causing the retainer spring to "buckle" and bow outward from the force. In certain circumstances, this may result in the sash pivot becoming partially dislodged from the sash pivot opening in the cam, thereby j~ i ng the slide ~ -block and preventing the sash from moving up or down in the ~amb channel.
For ~Y n,le, as best seen in Figure 6, when sash 14 or 16 is tilted, open top slot 37 may be oriented upward and directly opposite retainer spring 26. An upward force on sash 14 or 16, for instance applied by gripping the ~ash on the sides near sash pivots 22, tends to urge elongated portion 29 of sash pivot 22 against the free end 50 of retainer spring 26. Since spring 26 extends generally away from hou~ing 24 at the hooked first end 48, any force applied to free end S0 may induce this end to bow outward from housing 24. Given a sufficient force, free end S0 may buckle outward and allow sash pivot 22 to becs ~ partially di~lodged from its operating position.
The alternative embodiment shown in Figures 10 and 11 includes a ret~i~ing!means for protecting the free end of a retainer spring from the upward forces that could possibly cause failure of the locking slide block. -~
As shown in Figure 10, locking slide block 20' includes an alternative housing 24' and retainer spring 26'.
Housing 24' has a spring receiving recess 62 which extends into housing 24' for housing retainer spring 26' in operation. This recess 62 is integrally joined to 9 . : ~:
the cam receiving channel 30' which, in operation, houses the locking cam. In order to protect retainer spring 26' from the above-described forces, a pair of spring ret~ining flanges 61a and 61b are provided which extend across a portion of recess 62. In the preferred embodiment, flanges 61a and 61b extend outward from walls 60a and 60b of rece~s 62. Other flange configurations may also be used in lieu of that shown for flanges 61a and 61b. ~
Sash pivot retainer spring 26' has a hooked first ~ -end 48' which is received by aperture 49' to operably connect retainer spring 26' to housing 24'. Further, retainer spring 26' includes a free end 50', which has a pair of oppositely disposed and outwardly projecting spring flanges 52a and 52b.
Figure 11 shows an assembled locking slide block 20' without a sash pivot installed. Here, retainer spring 26' is installed, with metal plate 28' holding the spring in position. Free end 50' is housed within recess 62, proximate flange 61a and 61b, and proximate ~-cam 32'. In the configuration shown, when free end 50' is not depressed and in the normal position, spring flanges 52a and 52b cooperatively abut spring reta~ni~g ~ ;
flanges 61a and 61b. This cooperatively abutting ; ;i 25 relationship protects spring 26' when upward forces are ;~ ;
applied to free end 50' by a sash pivot. Free end 50' is not capable of bowing outward in a direction opposite the no- ~1 direction in which free end 50' 18 depressed ~ ' (such as when inserting or removing a sash pivot).
Thus, the free end is substantially protected from deforming due to these forces.
Returning to Figure 10, it may also be seen that it is preferable to leave sufficient space, i.e., a channel 63, in between flanges 6la and 6lb. This enables a sash 35 pivot to be inserted and removed from locking slide -block 20' through channel 63.
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One skilled in the art will appreciate that various ,~
2~t ~36~
~ ' modifications may be made without departing from the scope of the invention. For example, a number of different sizes and configurations of spring ret~ining flanges may be used to abut with free end 50' to protect 5 it from bowing outward. In addition, other spring ;~
flanges could be incorporatsd into free end 50' to cooperatively abut with the flanges over recess 62.
Further, spring flanges 52a and 52b could be eliminated altogether as long as flanges 6la and 6lb extend a sufficient distance across recess 62 to abut with free end 50' during normal use. It is further not necessary that flanges 52a and 52b abut flanges 61a and 61b in normal operation, as the normal operating position of free end 50' may be disposed away from the plane of flanges 6la and 6lb in its normal position.
Although characteristics and advantages, together with details of structure and function, have been described in reference to the preferred embodiments herein, it is understood that the disclosure is illustrative. To that degree, various ch~nges made, especially in matters of shape, size and arrangement, to the full extent exte~e~ by the general --ning of the terms in which the appen~e~ claims are expre~sed, are within the principle~ of the present invention.
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Fi~ld of tho Invention This invention generally relates to a locking slide block for double-hung tilt-out type windows.
R~c~,.o~nd of the In~ention Double-hung, tilt-out type windows have become increasingly popular. Much of this popularity is due to the tilt-out feature which allows both inside and outside surfaces of the window to be cleaned from the inside.
Tilt-out windows have been equipped with locking slide blocks 3uch as the one disclosed in U.S. Patent No. 4,610,108 to Marshik. Marshik discloses a double-hung window having a frame with a set of parallel jamb channels on opposite sides of the frame. Within each jamb chAnnel is a slidably mounted locking block. A
spring counter-b~l~nce --hAni~ is attached to a ~ -headplate on each block. A pivot extends from proximate the lower end of opposite sides of a sash into a locking cam housed within the block. The pivots allow the sash, which holds a window pane, to be rotated or tilted toward the inside. As the pivots rotate, the cam forces 25 serrated ends of a spring into opposite sides of the -~;' ~amb channel to p.~v~nt the counter-balance spring from pulling up the blocks and sash while cleAning.
U.S. Patent No. 4,813,180 to Scalzi discloses another locking sliding block for double-hung windows.
Like the '108 patent, a locking block is slidably mounted within iamb channels and a pivot extends from opposite sides o~ the sash into a pivot button or cam in each locking block. Unlike the '108 patent, ho eVel~
the pivot has a slot which engages a retAining ridge in ~ ;~
35 the pivot button. This is intended to prevent -dislocation of the pivots during transport and installation of the window due to deflection or bowing ~ of the frame away from the sash. The locking block -~ disclosed by Scalzi, although allowing the sash to pivot 21~'3~7~ :
inside for easy cleaning of the window pane, does not allow the window to be conveniently 1~ ved from the inside.
S Summary of the I~ve~tlon The invention addresses many of the problems associated with the prior art in providing a locking -slide block which enables the sash of a double-hung, ~' tilt-out type window to be tilted to the inside to ;-facilitate the cleaning, insertion and removal of the window sash and panes from a window frame. A sash pivot retA;n1ng sprinq configuration is utilized thereon to provide reliable, simple and relatively effortless ~ ~-operation of a locking slide block during shipping and 15 installation, as well as in normal use. ';
In accordance with the invention, a locking slide - block is provided for slidably and pivotably mounting a ~:
window sash to a side member of a window frame having a vertical ~amb channel with oppositely disposed sides.
20 The block has a housing with oppositely disposed sliding ;~ -~
surface~ for ~l;~ing the housing in the jamb chAnnel.
Within the block is a locking mean~ for selectively engaging the oppositely dispo~ed sides of the ~amb ~ ;
~hAnngl to lock the block in a fixed position relative to the ~amb ch~nn~l. A c~m is disposed within the housing. The cam has at least one camming surface which selectively operates the locking means. The cam also has a sash pivot opsn;ng with an open top slot, for att~ch; ng a sash pivot thereto. Sash pivots are 30 operatively connectable to each lower opposite side of a ~;
sash, for operatively connecting the sash to the cam. i~
The lock; ng slide block also has a sash pivot retainer spring having a first end operatively connected to the housing and a second end proximate the cam. The ~
35 second end has a first position for allowing the sash ~-pivot to be inserted or 1~- ~ved from the sash pivot opening through the open top slot. The second end also ~: -7 ~
has a second pesition for preventing removal of the sash pivot through the open top slot. The second end is normally biased to the second position, and may be depressed to the first position.
The locking slide block also preferably includes a second end ret~;ning means. The second end ret~ining means is operatively connected to the housing, and it operates to restrict .~v~- - t of the second end of the retainer spring past the second position in a direction opposite that of the first position. This protects the ~econd end from deforming due to forces applied to the window sash in operation, and thus increases the overall reliability of the slide block. ~-In a preferred embodiment, the second end ret~ining means utilizes at least one spring retaining flange which extends across a portion of ~ spring receiving ;~
recess to cooperatively about the second end of the spring in its second position. Further, cooperative fl~ngeg may algo be utilized on the retainer spring to facilitate this abutting relationship between the spring and the spring retAining flange.
These and other advantages and features, which characterize the invention, are pointed out with particularity in the claims AnneYe~ hereto and fo lng a part hereof. HoireveL, for a better underst~n~i ng of the invention, its advantages and ob~ectives attAine~ by its ;~
u~e, reference should be made to the drawing which forms a further part hereof and to the acc~ ~onying descriptive matter, in which there is described a preferred ~ ~3~i -nt ofithe invention.
Brief Description of the Drawinqs FIGURE 1 shows a double-hung window with a partially tilted sash.
FIGURE 2 shows an exploded perspective view of a locking slide block with sash pivot consistent with the invention, for use in the double-hung window in Figure ~ ;
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: 2 1 ~ 3 6 7 ~
FIGURE 3 shows an assembled locking slide block ~' without sash pivot consistent with the invention.
FIGURE 4 shows a pexspective view of the sash pivot. ~-~
FIGURE 5 shows a locXing slide block in an unlocked position in a jamb channel.
FIGURE 6 shows a locking slide block in a locked position in a ~amb channel.
FIGURE 7 shows a mirror image of the locking slide -block of Figure 5. ;~
FIGURE 8 shows parallel jamb channels, one with a counter-bAI~n~e spring cover and the other having a ~ ;;' locking slide block with sash pivot.
FIGURE 9 shows a cross-section of the locking slide block shown in Figure 6. -~
FIGURE 10 shows an exploded perspective view of an alternative housing and retaining spring consistent with '~ ,' the invention.
FIGURE 11 shows a perspective view of an assembled locking slide block without sash pivot, and with the ;;~
housing and retAining spring of Figure 10.
De~s~le~ Doscription of the Preferred '~ L
Referring now to the drawing, wherein like , referenced numeral~ designate identical or corresponding 25 parts throughout the ~everal views, Figure 1 shows a ", double-hung tilt-out window 10. The window 10 has a ''' frame 12 and an upper sash 14 and a lower sash 16 supporting window panes 15 and 17, respectively. The frame 12 also has four ~amb channels 18, one of which i8 30 shown in~Figure 1,, on a,~ide - ~or 13 of f,rame 12. One ~ ' ~amb chAnnel is proximate opposite sides of the upper ~a~h 14, and one is proximate opposite sides of lower sash 16. As shown in Figure 1, the lower sash 16 is partially tilted 60 that both sides of the window pane 17 within the lower sash 16 are accessible for cle~ning from the same side of window 10.
Figure 2 shows an exploded view of a locking slide 21~3~
block, generally referred to as 20, and sash pivot 22 of -the present invention. One locking slide block 20 i8 slidably mounted within each jamb channel 18. Fastened ~ -to lower opposite sides of each sash 14 and 16 is one ~-sash pivot 22~ These sash pivots 22 are supported for rotation by the locking slide blocks 20. Each sash is tiltable about a longitll~in~l axis through pivots 22 disposed on opposite sides of sashes 14 and 16.
As shown in Figure 2, locking slide block 20 has a 10 housing 24, preferably of rigid plastic. This housing -24 has sliding surfaces 25 with slots 27. The housing 24 has an aperture 49 and a plate groove 51 for attaching a sash pivot retainer spring 26 and a metal plate 28, respectively. A counter-balance spring (not shown) is attached to metal plate 28. The housing 24 ha~ a circular ch~nnPl 30, which extends into housing 24 generally parallel to sli~;n~ surfaces 25, for receiving ~ ;
a locking cam 32 having cr ing surfaces 31. Housing 24 also has a box-like area for receiving locking spring 34 which has serrated end portions 35. Locking cam 32 has a head 35 which, as known to those skilled in the art, retains spring 34 in the box-like area of housing 24.
Sash pivot retainer spring 26, as shown in Figure 2, has a hooke~ first end 48 which is received by aperture 49 to operably connect retainer spring 26 to housing 24.
Retainer spring 26 also has a free end 50. Retainer spring 26 is preferably constructed of spring steel.
Locking cam 32, a~ ~hown in Figure 2, has a sash pivot opening 33 with an open top slot 37. Located proximate a front side of locking cam 32, on opposite sides of sash pivot openi ng 33 are inwardly disposed cam fl~nges 39.
Figure 3 shows a per~pective view of the assembled locking slide block 20 without sash pivot 22. Retainer ~ ~;
spring 26 and plate 28 are shown installed within housing 24. Free end 50 of spring 26 is in a normal position proximate the front side of locking cam 32.
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Locking cam 32 is shown inserted within circular channel 30, and is retained within block 20 by a tab 38. Figure 3 also shows one serrated end portion 35 of spring 34 retracted within slot 27 in sliding surface 25. : ~
Figure 4 is a front view of sash pivot 22 having ;
oppositely disposed flanges 21 at one end of an :~
elongated portion 29, and a back 23. Sash pivots 22 are ;;
fastened to the lower opposite sides of sashes 14 and 16 so that the lengthwise axis of back 23 is parallel to the lengthwise axis of the sash side.
Figure 5 shows loeking slide block 20 inserted in ~amb channel 18 having sides 40. Sliding surfaces 25 of sliding loeking block 20 are proximate side 40 of jamb channel 18. Loeking slide block 20 is held within jamb ehannel 18 by a flexible raised ~amb channel face 42 having opening 44.
As shown in Figure 6, the serrated portions of ~ .
spring 34 are engaged with sliding surfaces 25 to prevent the eounter-bAl~n~e spring from pulling locking ~ '.. ;.
slide bloek 20 and sash 14 or 16 upward when sash 14 or 16, respeetively, is tilted. When sash 14 or 16 and, thus baek 23, is rotated from vertieal, locking cam 32 rotates 80 that cr ~g surfaees 31 force serrated end portions 35 of ~pring 34 out slots 27. In Figure 6, back 23 i8 tilted to a horizon'cal po~ition at applo~imately 90~ to ~amb channel 18. This position al~o corresponds to sash 14 or 16 tilted at 90~ to jamb chAnnel 18.
Also shown in Figure 6, sash pivot 22 is operably eonneeted to locking cam 32 by rotating cam 32 (by a tool not shown) so that open top slot 37 opens upward beneath retainer spring 26. Sash pivot 22 is inserted into ~ash pivot openi ng 33 by depressing the free end 50 of retainer spring 26 inwardly away from the front side 35 of locklng cam 32 to a first depressed position. After :~
sash pivot 22 i~ inserted in sash pivot opening 33, the -~
free end of retainer spring 26 moves baek to a nc~
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7 . ~:~
second position over opening 33. Once retainer spring ;~
26 moves back over opening 33, sash pivot 22 cannot slip ~:
out of opening 33. Without retainer spring 26, sash ~ :
pivot 22 might slip out of opening 33 when sash 14 or 16 :~
5 is tilted. :
As best shown in Figure 9, a cross-sectional view of cam 32 and sash pivot 22 taken from Figure 6, when sash pivot 22 is inserted into sash pivot opening 33, the ~.
elongated portion 29 extends into the op~ning beyond cam flanges 39. Flanges 21 of sash pivot 22 are disposed widely enough that when sash pivot 22 is inserted in this onner~ flanges 21 engage with cam flanges 39 so that sash pivot 22 cannot be pulled out of the pivot :;~
opening in a direction proximately parallel to a 15 longitl-~;n~l axis of the elongated portion 29. This ::
feature is particularly important during transport and installation of window 10. During transport and installation, side members 13 of frame 12 may bow outwardly away from sashes 14 and/or 16 so that without the engagement of flanges 21 with cam flanges 39, elongated portion 29 of sash pivot 22 could be pulled out of sash pivot opening 33.
Figure 7 shows back 23 of sash pivot 22 oriented vertically. This position of back 23 corresponds to the 25 closed or vertical position of sash 14 or 16. Serrated ~:
end portions 35 of spring 34 are not engaged with sides 40 of ~amb c~An~el 18. Locking slide block 20 and sash 14 or 16 is thus free to slide vertically within ~amb -~
c~nn~l 18. The counter-h~lAnce spring tnot shown) attached to plate~28 assists in sliding locking slide blocks 20 and sashes 14 or 16 upward in jamb channels 18.
~: Figure 8 show~ a cross-~ectional view of parallel ~amb channels 18. In one of the jamb channels 18 is ~ ~.
shown locking slide block 20 without serrated end portions 35 of spring 34 exten~ing beyond sides 25 of locking slide block 20. As previously shown in Figure :' ,, ' ':;:
q ~
8 2~13~
7, back 23 of sash pivot 22 is positioned vertically.
Flexible jamb channel ~ace 42 is engaged with a sash groove 46 to retain sash 16 vertically within frame 12 (not shown).
Figures 10 and 11 show an alternative embodiment of the locking slide block consistent with the invention.
It has been di~covered that in certain instances, forces applied to a sash may be applied by a sash pivot to the retainer spring in a locking slide block, causing the retainer spring to "buckle" and bow outward from the force. In certain circumstances, this may result in the sash pivot becoming partially dislodged from the sash pivot opening in the cam, thereby j~ i ng the slide ~ -block and preventing the sash from moving up or down in the ~amb channel.
For ~Y n,le, as best seen in Figure 6, when sash 14 or 16 is tilted, open top slot 37 may be oriented upward and directly opposite retainer spring 26. An upward force on sash 14 or 16, for instance applied by gripping the ~ash on the sides near sash pivots 22, tends to urge elongated portion 29 of sash pivot 22 against the free end 50 of retainer spring 26. Since spring 26 extends generally away from hou~ing 24 at the hooked first end 48, any force applied to free end S0 may induce this end to bow outward from housing 24. Given a sufficient force, free end S0 may buckle outward and allow sash pivot 22 to becs ~ partially di~lodged from its operating position.
The alternative embodiment shown in Figures 10 and 11 includes a ret~i~ing!means for protecting the free end of a retainer spring from the upward forces that could possibly cause failure of the locking slide block. -~
As shown in Figure 10, locking slide block 20' includes an alternative housing 24' and retainer spring 26'.
Housing 24' has a spring receiving recess 62 which extends into housing 24' for housing retainer spring 26' in operation. This recess 62 is integrally joined to 9 . : ~:
the cam receiving channel 30' which, in operation, houses the locking cam. In order to protect retainer spring 26' from the above-described forces, a pair of spring ret~ining flanges 61a and 61b are provided which extend across a portion of recess 62. In the preferred embodiment, flanges 61a and 61b extend outward from walls 60a and 60b of rece~s 62. Other flange configurations may also be used in lieu of that shown for flanges 61a and 61b. ~
Sash pivot retainer spring 26' has a hooked first ~ -end 48' which is received by aperture 49' to operably connect retainer spring 26' to housing 24'. Further, retainer spring 26' includes a free end 50', which has a pair of oppositely disposed and outwardly projecting spring flanges 52a and 52b.
Figure 11 shows an assembled locking slide block 20' without a sash pivot installed. Here, retainer spring 26' is installed, with metal plate 28' holding the spring in position. Free end 50' is housed within recess 62, proximate flange 61a and 61b, and proximate ~-cam 32'. In the configuration shown, when free end 50' is not depressed and in the normal position, spring flanges 52a and 52b cooperatively abut spring reta~ni~g ~ ;
flanges 61a and 61b. This cooperatively abutting ; ;i 25 relationship protects spring 26' when upward forces are ;~ ;
applied to free end 50' by a sash pivot. Free end 50' is not capable of bowing outward in a direction opposite the no- ~1 direction in which free end 50' 18 depressed ~ ' (such as when inserting or removing a sash pivot).
Thus, the free end is substantially protected from deforming due to these forces.
Returning to Figure 10, it may also be seen that it is preferable to leave sufficient space, i.e., a channel 63, in between flanges 6la and 6lb. This enables a sash 35 pivot to be inserted and removed from locking slide -block 20' through channel 63.
. ~: .
One skilled in the art will appreciate that various ,~
2~t ~36~
~ ' modifications may be made without departing from the scope of the invention. For example, a number of different sizes and configurations of spring ret~ining flanges may be used to abut with free end 50' to protect 5 it from bowing outward. In addition, other spring ;~
flanges could be incorporatsd into free end 50' to cooperatively abut with the flanges over recess 62.
Further, spring flanges 52a and 52b could be eliminated altogether as long as flanges 6la and 6lb extend a sufficient distance across recess 62 to abut with free end 50' during normal use. It is further not necessary that flanges 52a and 52b abut flanges 61a and 61b in normal operation, as the normal operating position of free end 50' may be disposed away from the plane of flanges 6la and 6lb in its normal position.
Although characteristics and advantages, together with details of structure and function, have been described in reference to the preferred embodiments herein, it is understood that the disclosure is illustrative. To that degree, various ch~nges made, especially in matters of shape, size and arrangement, to the full extent exte~e~ by the general --ning of the terms in which the appen~e~ claims are expre~sed, are within the principle~ of the present invention.
' :.
",'., , "
., ~, ' ~ .
~ :, , "
',' ~' "',' ,'' ~: ~,~....
Claims (14)
1. A locking slide block for slidably and pivotably mounting a window sash to a side member of a window frame having a vertical jamb channel, the slide block comprising:
(a) a housing having oppositely disposed sliding surfaces for guiding the housing in a jamb channel;
(b) locking means for selectively engaging the jamb channel and locking the slide block in a fixed position relative to the jamb channel;
(c) a cam disposed in the housing, the cam having at least one camming surface arranged and configured to selectively operate the locking means, and wherein the cam includes a sash pivot opening having an open top slot;
(d) a sash pivot operatively connected to the cam in the sash pivot opening, and wherein the sash pivot is operatively connectable to a window sash;
(e) a sash pivot retainer spring, the retainer spring having a first end operatively connected to the housing and a second end proximate the cam, wherein the second end has a first position for allowing the sash pivot to be inserted or removed from the sash pivot opening through the open top slot and a second position for preventing removal of the sash pivot through the open top slot, the second end being normally biased to the second position and depressible to the first position; and (f) second end retaining means, operatively connected to the housing, for restricting movement of the second end past the second position in a direction opposite the first position; whereby the second end is protected from deforming due to forces applied to the window sash in operation.
(a) a housing having oppositely disposed sliding surfaces for guiding the housing in a jamb channel;
(b) locking means for selectively engaging the jamb channel and locking the slide block in a fixed position relative to the jamb channel;
(c) a cam disposed in the housing, the cam having at least one camming surface arranged and configured to selectively operate the locking means, and wherein the cam includes a sash pivot opening having an open top slot;
(d) a sash pivot operatively connected to the cam in the sash pivot opening, and wherein the sash pivot is operatively connectable to a window sash;
(e) a sash pivot retainer spring, the retainer spring having a first end operatively connected to the housing and a second end proximate the cam, wherein the second end has a first position for allowing the sash pivot to be inserted or removed from the sash pivot opening through the open top slot and a second position for preventing removal of the sash pivot through the open top slot, the second end being normally biased to the second position and depressible to the first position; and (f) second end retaining means, operatively connected to the housing, for restricting movement of the second end past the second position in a direction opposite the first position; whereby the second end is protected from deforming due to forces applied to the window sash in operation.
2. The locking slide block of claim 1, wherein the retaining spring is disposed within a spring receiving recess extending into the housing, and wherein the second end retaining means comprises at least one spring retaining flange, extending across at least a portion of the spring receiving recess, and arranged and configured to cooperatively abut the second end of the retaining spring when the retaining spring is in the second position.
3. The locking slide block of claim 2, wherein the retainer spring comprises at least one spring flange, disposed on the second end, and arranged and configured to cooperatively abut with the at least one spring retaining flange when the second end is in the second position.
4. The locking slide block of claim 1, wherein the second end is disposed proximate the sash pivot opening, and wherein the second position at least partially covers the open top slot for preventing removal of the ash pivot through the open top slot.
5. The locking slide block of claim 1, wherein the locking means is a locking spring having oppositely disposed serrated end portions.
6. The locking slide block of claim 1, further comprising a plate for attaching a counterbalance spring.
7. The locking slide block of claim 1, wherein:
(a) the sash pivot has a longitudinal axis and two flanges, located at one end of an elongated portion of the sash pivot and oppositely and outwardly disposed from the longitudinal axis of the sash pivot; and (b) the open top slot is defined by a bottom, a first side and a second side, the first and second sides each having a cam flange, wherein the elongated portion of the sash pivot may be inserted into the open top slot such that the flanges of the sash pivot engage with the cam flanges to prevent the sash pivot from being pulled out of the sash pivot opening in a direction generally parallel to the longitudinal axis of the elongated portion of the pivot.
(a) the sash pivot has a longitudinal axis and two flanges, located at one end of an elongated portion of the sash pivot and oppositely and outwardly disposed from the longitudinal axis of the sash pivot; and (b) the open top slot is defined by a bottom, a first side and a second side, the first and second sides each having a cam flange, wherein the elongated portion of the sash pivot may be inserted into the open top slot such that the flanges of the sash pivot engage with the cam flanges to prevent the sash pivot from being pulled out of the sash pivot opening in a direction generally parallel to the longitudinal axis of the elongated portion of the pivot.
8. A locking slide block for slidably and pivotably mounting a window sash to a side member of a window frame having a vertical jamb channel, the slide block comprising:
(a) a housing having:
(i) oppositely disposed sliding surfaces for guiding the housing in a jamb channel;
(ii) a cam receiving channel extending into the housing generally parallel to the sliding surfaces;
(iii) a spring receiving recess extending into the housing and integrally joined to the cam receiving channel; and (iv) at least one spring retaining flange, extending across at least a portion of the receiving recess proximate the cam receiving channel;
(b) locking means for selectively engaging the jamb channel and locking the slide block in a fixed position relative to the jamb channel;
(c) a cam disposed in the cam receiving channel, the cam having at least one camming surface arranged and configured to selectively operate the locking means, and wherein the cam includes a sash pivot opening having an open top slot;
(d) a sash pivot operatively connected to the cam in the sash pivot opening, and wherein the sash pivot is operatively connectable to a window sash;
and (e) a sash pivot retainer spring disposed in the spring receiving recess, the retainer spring having a first end operatively connected to the housing and a second end proximate the at least one spring retaining flange, wherein the second end has a first position for allowing the sash pivot to be inserted or removed from the sash pivot opening through the open top slot and a second position for preventing removal of the sash pivot through the open top slot, the second end being normally biased to the second position and depressible to the first position, and wherein the second end is arranged and configured such that the at least one spring retaining flange restricts movement of the second end past the second position in a direction opposite the first position; whereby the second end is protected from deforming due to forces applied to the window sash in operation.
(a) a housing having:
(i) oppositely disposed sliding surfaces for guiding the housing in a jamb channel;
(ii) a cam receiving channel extending into the housing generally parallel to the sliding surfaces;
(iii) a spring receiving recess extending into the housing and integrally joined to the cam receiving channel; and (iv) at least one spring retaining flange, extending across at least a portion of the receiving recess proximate the cam receiving channel;
(b) locking means for selectively engaging the jamb channel and locking the slide block in a fixed position relative to the jamb channel;
(c) a cam disposed in the cam receiving channel, the cam having at least one camming surface arranged and configured to selectively operate the locking means, and wherein the cam includes a sash pivot opening having an open top slot;
(d) a sash pivot operatively connected to the cam in the sash pivot opening, and wherein the sash pivot is operatively connectable to a window sash;
and (e) a sash pivot retainer spring disposed in the spring receiving recess, the retainer spring having a first end operatively connected to the housing and a second end proximate the at least one spring retaining flange, wherein the second end has a first position for allowing the sash pivot to be inserted or removed from the sash pivot opening through the open top slot and a second position for preventing removal of the sash pivot through the open top slot, the second end being normally biased to the second position and depressible to the first position, and wherein the second end is arranged and configured such that the at least one spring retaining flange restricts movement of the second end past the second position in a direction opposite the first position; whereby the second end is protected from deforming due to forces applied to the window sash in operation.
9. The locking slide block of claim 8, wherein the retainer spring comprises at least one spring flange, disposed on the second end, and arranged and configured to cooperatively abut with the at least one spring retaining flange on the housing when the second end is in the second position.
10. The locking slide block of claim 8, wherein the housing comprises two oppositely disposed spring retaining flanges, each spring retaining flange extending across at least a portion of the receiving recess proximate the cam receiving channel, wherein the spring retaining flanges define a channel therebetween, the channel being sized such that the sash pivot is capable of passing through the channel when the sash pivot is being inserted or removed from the sash pivot opening through the open top slot.
11. The locking slide block of claim 8, wherein the second end is disposed proximate the sash pivot opening, and wherein the second position at least partially covers the open top slot for preventing removal of the sash pivot through the open top slot.
12. The locking slide block of claim 8, wherein the locking means is a locking spring having oppositely disposed serrated end portions.
13. The locking slide block of claim 8, further comprising a plate for attaching a counterbalance spring.
14. The locking slide block of claim 8, wherein:
(a) the sash pivot has a longitudinal axis and two flanges, located at one end of an elongated portion of the sash pivot and oppositely and outwardly disposed from the longitudinal axis of the sash pivot; and (b) the open top slot is defined by a bottom, a first side and a second side, the first and second sides each having a cam flange, wherein the elongated portion of the sash pivot may be inserted into the open top slot such that the flanges of the sash pivot engage with the cam flanges to prevent the sash pivot from being pulled out of the sash pivot opening in a direction generally parallel to the longitudinal axis of the elongated portion of the pivot.
(a) the sash pivot has a longitudinal axis and two flanges, located at one end of an elongated portion of the sash pivot and oppositely and outwardly disposed from the longitudinal axis of the sash pivot; and (b) the open top slot is defined by a bottom, a first side and a second side, the first and second sides each having a cam flange, wherein the elongated portion of the sash pivot may be inserted into the open top slot such that the flanges of the sash pivot engage with the cam flanges to prevent the sash pivot from being pulled out of the sash pivot opening in a direction generally parallel to the longitudinal axis of the elongated portion of the pivot.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/116,039 US5301467A (en) | 1992-06-24 | 1993-09-02 | Locking slide block |
| US08/116,039 | 1993-09-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2113676A1 CA2113676A1 (en) | 1995-03-03 |
| CA2113676C true CA2113676C (en) | 1997-11-18 |
Family
ID=22364879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2113676 Expired - Fee Related CA2113676C (en) | 1993-09-02 | 1994-01-18 | Locking slide block |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2113676C (en) |
-
1994
- 1994-01-18 CA CA 2113676 patent/CA2113676C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2113676A1 (en) | 1995-03-03 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |