CA1062750A - Collapsible supporting frame - Google Patents
Collapsible supporting frameInfo
- Publication number
- CA1062750A CA1062750A CA255,583A CA255583A CA1062750A CA 1062750 A CA1062750 A CA 1062750A CA 255583 A CA255583 A CA 255583A CA 1062750 A CA1062750 A CA 1062750A
- Authority
- CA
- Canada
- Prior art keywords
- supporting frame
- collapsible
- members
- collapsible supporting
- sleigh
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B13/00—Sledges with runners
- B62B13/16—Collapsible or foldable sledges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Tents Or Canopies (AREA)
Abstract
COLLAPSIBLE SUPPORTING FRAME
ABSTRACT OF THE DISCLOSURE
An improved collapsible supporting frame having, in erect position, foldable side assemblies comprising vertically spaced substantially horizontal members, pivotally attached to substantially vertical members; collapsible means connecting said foldable side assemblies to each other; rigid members sub-stantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members;
means to restrain unwanted collapsing of said collapsible means;
and one front and one rear set of cross bars, each forming an "X" in the open position, each said bar having one end pivotally attached to a said vertical member while the other end is pivotally attached to one of said rigid members. This collapsi-ble supporting frame folds forwardly and downwardly on top of said rigid members and simultaneously brings said rigid members together. Preferably, this collapsible supporting frame collapses and folds in one single operation after unlocking of the collapsing restraining means, and is particularly well adapted to provide a collapsible transportation device which is easily stored and transported.
ABSTRACT OF THE DISCLOSURE
An improved collapsible supporting frame having, in erect position, foldable side assemblies comprising vertically spaced substantially horizontal members, pivotally attached to substantially vertical members; collapsible means connecting said foldable side assemblies to each other; rigid members sub-stantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members;
means to restrain unwanted collapsing of said collapsible means;
and one front and one rear set of cross bars, each forming an "X" in the open position, each said bar having one end pivotally attached to a said vertical member while the other end is pivotally attached to one of said rigid members. This collapsi-ble supporting frame folds forwardly and downwardly on top of said rigid members and simultaneously brings said rigid members together. Preferably, this collapsible supporting frame collapses and folds in one single operation after unlocking of the collapsing restraining means, and is particularly well adapted to provide a collapsible transportation device which is easily stored and transported.
Description
- "~
1~627S~ ;
FIE:LD OF INVENTION
This invention relates to improvements in collapsible supporting frames and has for its main object the provision of a new concept of folding mechanism which permits to fold the supporting frame into an extremely compact form. Another ob~ect o this invention is to provide a collapsible supporting frame that can be readily opened up or closed in one single operation, thus being simple to operate. Still another object of this invention is to provide a very light supporting frame. A
further object of this invention is to provide a supporting frame wherein at the same time it collapses in width,the vertical members fold forwardly and downwardly until they are sub- ;
stantially parallel to the horizontal members of said frame to form an extremely compact bundle of components. A still further object of this invention is to provid~e a sleigh comprising a collapsible supporting frame which collapses forwardly and downwardly on the runners of the sleigh at the same time said runners are brought together to form an extremely low and ; ~ ~ compact unit easily transported and stored.- ` -i ;
Other objects will appear hereinafter~
: , . ' ; . ' ., ' '''',': ~ `~' ~6Z750 S T~MI~NT OF T~IE INVF~NTION
The invention consists essentially of a collapsible supporting frame comprising foldable side assemblies with vertically spaced substantially horizontal members, pivotally -attached to substantially vertical members, collapsible means ~-~ , connecting said foldable side assemblies to each other, r~ig members which are substantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members, and means to restrain unwanted collapsing of said collapsible means.
BRIEF DESCRIPTION OF D:R~WINGS
In the detailed description of the preferred embodiments of the invention presented below, reference is made to the accompanying drawings, in which:
15~ ~Fig. l ~ is a perspective view of a complete sleigh;
Fig. 2 is a side view of the sleigh shown in Fig. l;
Fig. 3 is a top view of the sleigh shown in Fig. 1 and 2;
Fig. 4 is an enlarged perspective view showing the sleigh - -without a canvas; ~`
Q Eig. 5 is a perspective view o~ the stop lock preventing unwanted collapsing o~ the collapsible means connecting both side assemblies together; ~ `~
. . " ~'~ ;' :' - 3 ~
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Eig. 6 is an enlarged perspective view of the brackets supporting the rear vertical members;
. -~ig. 7 is an enlarged perspective view of the bracketsupporting the front vertical members;
~ig. 8 is a top view of a dif~erent embodiment of the col- -lapsible means connecting both side assemblies at the rear;
Fig. 9 is a side view of a sub-section showing the attachment of one of the rear cross members to one rear vertical -member; ~ -~g. 10 is a perspective view showing the attachment of one of the front cross members to one of the front vertical members;
, ~ig. 11 is a rear elevated perspective view of a sleigh com- ;
prising the collapsible means shown in Fig. 8;
Fig. 12 is a top view of a sleigh without a canvas in its closed position;
Flg. 13 is a top view of a sleigh with a canvas, in its closed position;
Fig.~14 ~is a slde view of the sleigh shown in Fig. 13;
Fig. 15 is a side view of the sleigh shown in Fig. 12;
Fig. 16 is a front view of the sleigh shown in Fig. l;
~ Flg~ 17 is a rear view of the sleigh shown in Fig. 1.
:- : : ::
~ Like numerals of reference indicate corresponding ; ~parts in each figure. ~ `
: '- ~ ' DESCRIPTION O~ Tl-lE P EFERRED EMBODIMENT
The preferred form of construction when assembled with runners to form a sleigh, as illustrated in the accompanying - ~ -drawings, comprises a pair of runners on which four vertical tubular pieces are pivotally installed and interconnected in the manner hereinafter shown.
Referring to Fig. 2, it will be seen that the front vertical tubular piece 11 is interconnected to the rear vertical tubular piece 12 by an upper horizontal tubular piece 13 and .
a lower horizontal tubular piece 28 which are generally parallel to the runner. These horizontal tubular pieces are pivotally ~ :
connected at one end by pivot 22 to vertical tubular piece 11 ~
and at the other end to vertical tubular piece 12. . `
: The vertical tubular piece 11 is pivotally connected at its lower end by a pivot 22 to bracket 21 which is solidly attached to the top of the runner. Similarly, vertical tubular piece 12 is pivotally connected at its lower end by pivot 22 to bracket 23 which is solidly attached to the top of -the runnera A stop 38 is provided at the rear of said bracket ~- -20 23 to prevent excess rearward movement of the vertical tubular ~ .
piece 12 when it is in its erect position.
` : A similar side assembly is provided on the other side :: :
as appears from Fig~ 4.
' : :- ':,'' . ~ ~ These two side assemblies are interconnected in the .-~followlng way~
at the f:ront, the two vertical tubular pieces 11, one for each . .:: :
~ : ::: :
side assembly, are interconnected by collapsible mean comprising :
an upper se~ of horizontal links 14 and 15, and a lower set of -S- '` ': `' "' ~ ' ~,~', .
~627S~l~
havin~ their dis-tal end connec-ted by pivot 22 to the top end portion of r~spective vertical tubular piece 11, and their proximal end connected together by pivot 22; and a lower set of links 17 and 18 similarly having their distal end connected together by pivot 22. Link 14 is connected to link 15 to form an upper knee-joint and link 17 i~ connected to link 18 to form a lower knee-joint.
One link 17 is provided with a shoulder lock 32 on ~' ' its upperside, said lock is adapted to contact with the corre-sponding link 18 at the knee-joint, therefore limiting the downward swing or movement thereof and providing a safety lock '' when the sleigh is in the opened position.
The two sets of horizontal links, 14/15 and 17/1% are pivotally interconnected at the knee-joints by a central vertical bar 16 to maintain a parallel relationship between the ~wo sets of links and also to permit folding or unfolding the lower,knee-joint 17/18 simultaneously with the folding or unfolding o~ the upper knee-joint 14/15.
Front cross-bars 19 and 20 form an X in the open position. The rear end of said cross-bars 19 and 20 are '~
connected by pivots 22 to a swivel 24 which is solidly a~tached ;
to the top of the runners. The front end of said cross bars 19 and 20 are connected by pivots 22 to a swivel 3'3 which is ~-' '. ~ . ,.~ , ~ , .
solidly attached to bracket 34 which is in turn solidly mounted on the central portion of vertical tubular piece 11. ~
., .
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: l~6;~75~
1 Rear cross bars 25 and 26 forming an X in the open position are connected by pivots 22 at their respective rear and lower ends to a swivel 24 which is solidly attached to the top of the runners. The forward and top end section of cross bars 25 and 26 are respectively connected by pivot 22 to the upper end of respective vertical tubular piece 12. Cross bars 19/20 and 25/26 are preferably pivotally connected together at their respective junction points 20-A and 25-A.
These two sets of cross bars 19 and 20, 25 and 26 move the runners toward each other when the vertical tubular pieces 11 and 12 are moved forward during the folding process.
Cross bars 19 and 20 also prevent forward or rearward movement of a runner r~lative to the other. Cross bars 25 and 26 also prevent sideway swing of the rear vertical tubular pieces 12.
The two side assemblies are also interconnected at the rear by a collapsible mechanism comprising an upper set of links 30 and 31 having their distal end connected by pivot 22 to the top end portion of respective vertical tubular piece 12, and their proximal ends connected together by pivot 22; and a lower set of links 34 and 36 similarly having their distal ends connected by pivot 22 to the lower end section of respective vertical tubular piece 12 r and their proximal ends connected together by pivot 22. Link 30 is connected to link 31 to form an upper knee-joint and link 34 is connected to link 36 to form a lower knee-joint. Said upper knee-joint 30/31 and lower knee-joint 34/36 being interconnected by pivot 22 to central vertical bar 37, to maintain a parallel relationship between the two sets ,,, ; c-of links and also to permit folding and unfolding of the lower knee-joint 34/36 simultaneously with the folding or unfolding of the upper knee-joint 30/31. The vertical link 37 is provided with a loop 27 at its uppermost end to facilitate folding or unfolding of the sleigh.
,,,,, .. -:~0627S~
One link 31 is provided with a shoulder lock 32 at the upper side, adapted to contact with the corresponding connected link 30 at the knee-joint, therefore limiting the downward swing or movement thereof to a horizontal line, equally providing a sa~ety lock when the sleigh is in the opened position.
As shown in Fig. 8 and 11, in one particular embodi-ment of this invention, links 30 and 31 are curved rearwardly to allow sufficient back clearance for the occupant of the 10 sleigh.
The rear set of cross bars 25 and 26 are used to bring the runners together as the supporting frame is folded front-wardly and downwardly on to the top of the runners, and also to prevent sideway swing of the rear vertical tubular pieces 12 Openin~ o~ the sleigh is accomplished by pulling upward on the loop 27 until the tubular pieces 12 rom~ into contact with the stop 38; then pushing downward on both stop -~
locks 32 to lock the mechanism in safe operational position.
Folding of the sleigh is accomplished by pullins simultaneously upward on the stop locks 32, then pushing forward on the loop 27 to collapse the entire frame forward on top of the runners while said runners are moved towards each other.
' ~.' ' ~ -::
-- 8 -- . .
.. . .
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1 Therefore, as described hereabove I have invented a new collapsible supporting frame and folding mechanism which have particular application in collapsible sleighs but may also find application in other structures. While the invention has been illustrated in relation to a collapsible sleigh, it will be obvious that it is susceptible to some changes and modifi-cations and of applications to other structures without departing from the principles and spirit thereof and for this reason I
do not wish to be limited to the precise arrangement, formation and structure of the several parts of the folding mechanism herein shown, except as claimed.
For example, the runners could be replaced by skis, blades, floaters or other rigid members. Similarly, wheels or anchor means could be attached to such rigid members or near the lower end of the vertical tubular pieces 11 and 12.
. : .
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1~627S~ ;
FIE:LD OF INVENTION
This invention relates to improvements in collapsible supporting frames and has for its main object the provision of a new concept of folding mechanism which permits to fold the supporting frame into an extremely compact form. Another ob~ect o this invention is to provide a collapsible supporting frame that can be readily opened up or closed in one single operation, thus being simple to operate. Still another object of this invention is to provide a very light supporting frame. A
further object of this invention is to provide a supporting frame wherein at the same time it collapses in width,the vertical members fold forwardly and downwardly until they are sub- ;
stantially parallel to the horizontal members of said frame to form an extremely compact bundle of components. A still further object of this invention is to provid~e a sleigh comprising a collapsible supporting frame which collapses forwardly and downwardly on the runners of the sleigh at the same time said runners are brought together to form an extremely low and ; ~ ~ compact unit easily transported and stored.- ` -i ;
Other objects will appear hereinafter~
: , . ' ; . ' ., ' '''',': ~ `~' ~6Z750 S T~MI~NT OF T~IE INVF~NTION
The invention consists essentially of a collapsible supporting frame comprising foldable side assemblies with vertically spaced substantially horizontal members, pivotally -attached to substantially vertical members, collapsible means ~-~ , connecting said foldable side assemblies to each other, r~ig members which are substantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members, and means to restrain unwanted collapsing of said collapsible means.
BRIEF DESCRIPTION OF D:R~WINGS
In the detailed description of the preferred embodiments of the invention presented below, reference is made to the accompanying drawings, in which:
15~ ~Fig. l ~ is a perspective view of a complete sleigh;
Fig. 2 is a side view of the sleigh shown in Fig. l;
Fig. 3 is a top view of the sleigh shown in Fig. 1 and 2;
Fig. 4 is an enlarged perspective view showing the sleigh - -without a canvas; ~`
Q Eig. 5 is a perspective view o~ the stop lock preventing unwanted collapsing o~ the collapsible means connecting both side assemblies together; ~ `~
. . " ~'~ ;' :' - 3 ~
.. ' ' ;' ~ ' ::~ . ' 3L~6Z75~
Eig. 6 is an enlarged perspective view of the brackets supporting the rear vertical members;
. -~ig. 7 is an enlarged perspective view of the bracketsupporting the front vertical members;
~ig. 8 is a top view of a dif~erent embodiment of the col- -lapsible means connecting both side assemblies at the rear;
Fig. 9 is a side view of a sub-section showing the attachment of one of the rear cross members to one rear vertical -member; ~ -~g. 10 is a perspective view showing the attachment of one of the front cross members to one of the front vertical members;
, ~ig. 11 is a rear elevated perspective view of a sleigh com- ;
prising the collapsible means shown in Fig. 8;
Fig. 12 is a top view of a sleigh without a canvas in its closed position;
Flg. 13 is a top view of a sleigh with a canvas, in its closed position;
Fig.~14 ~is a slde view of the sleigh shown in Fig. 13;
Fig. 15 is a side view of the sleigh shown in Fig. 12;
Fig. 16 is a front view of the sleigh shown in Fig. l;
~ Flg~ 17 is a rear view of the sleigh shown in Fig. 1.
:- : : ::
~ Like numerals of reference indicate corresponding ; ~parts in each figure. ~ `
: '- ~ ' DESCRIPTION O~ Tl-lE P EFERRED EMBODIMENT
The preferred form of construction when assembled with runners to form a sleigh, as illustrated in the accompanying - ~ -drawings, comprises a pair of runners on which four vertical tubular pieces are pivotally installed and interconnected in the manner hereinafter shown.
Referring to Fig. 2, it will be seen that the front vertical tubular piece 11 is interconnected to the rear vertical tubular piece 12 by an upper horizontal tubular piece 13 and .
a lower horizontal tubular piece 28 which are generally parallel to the runner. These horizontal tubular pieces are pivotally ~ :
connected at one end by pivot 22 to vertical tubular piece 11 ~
and at the other end to vertical tubular piece 12. . `
: The vertical tubular piece 11 is pivotally connected at its lower end by a pivot 22 to bracket 21 which is solidly attached to the top of the runner. Similarly, vertical tubular piece 12 is pivotally connected at its lower end by pivot 22 to bracket 23 which is solidly attached to the top of -the runnera A stop 38 is provided at the rear of said bracket ~- -20 23 to prevent excess rearward movement of the vertical tubular ~ .
piece 12 when it is in its erect position.
` : A similar side assembly is provided on the other side :: :
as appears from Fig~ 4.
' : :- ':,'' . ~ ~ These two side assemblies are interconnected in the .-~followlng way~
at the f:ront, the two vertical tubular pieces 11, one for each . .:: :
~ : ::: :
side assembly, are interconnected by collapsible mean comprising :
an upper se~ of horizontal links 14 and 15, and a lower set of -S- '` ': `' "' ~ ' ~,~', .
~627S~l~
havin~ their dis-tal end connec-ted by pivot 22 to the top end portion of r~spective vertical tubular piece 11, and their proximal end connected together by pivot 22; and a lower set of links 17 and 18 similarly having their distal end connected together by pivot 22. Link 14 is connected to link 15 to form an upper knee-joint and link 17 i~ connected to link 18 to form a lower knee-joint.
One link 17 is provided with a shoulder lock 32 on ~' ' its upperside, said lock is adapted to contact with the corre-sponding link 18 at the knee-joint, therefore limiting the downward swing or movement thereof and providing a safety lock '' when the sleigh is in the opened position.
The two sets of horizontal links, 14/15 and 17/1% are pivotally interconnected at the knee-joints by a central vertical bar 16 to maintain a parallel relationship between the ~wo sets of links and also to permit folding or unfolding the lower,knee-joint 17/18 simultaneously with the folding or unfolding o~ the upper knee-joint 14/15.
Front cross-bars 19 and 20 form an X in the open position. The rear end of said cross-bars 19 and 20 are '~
connected by pivots 22 to a swivel 24 which is solidly a~tached ;
to the top of the runners. The front end of said cross bars 19 and 20 are connected by pivots 22 to a swivel 3'3 which is ~-' '. ~ . ,.~ , ~ , .
solidly attached to bracket 34 which is in turn solidly mounted on the central portion of vertical tubular piece 11. ~
., .
~ , '",' - "
: l~6;~75~
1 Rear cross bars 25 and 26 forming an X in the open position are connected by pivots 22 at their respective rear and lower ends to a swivel 24 which is solidly attached to the top of the runners. The forward and top end section of cross bars 25 and 26 are respectively connected by pivot 22 to the upper end of respective vertical tubular piece 12. Cross bars 19/20 and 25/26 are preferably pivotally connected together at their respective junction points 20-A and 25-A.
These two sets of cross bars 19 and 20, 25 and 26 move the runners toward each other when the vertical tubular pieces 11 and 12 are moved forward during the folding process.
Cross bars 19 and 20 also prevent forward or rearward movement of a runner r~lative to the other. Cross bars 25 and 26 also prevent sideway swing of the rear vertical tubular pieces 12.
The two side assemblies are also interconnected at the rear by a collapsible mechanism comprising an upper set of links 30 and 31 having their distal end connected by pivot 22 to the top end portion of respective vertical tubular piece 12, and their proximal ends connected together by pivot 22; and a lower set of links 34 and 36 similarly having their distal ends connected by pivot 22 to the lower end section of respective vertical tubular piece 12 r and their proximal ends connected together by pivot 22. Link 30 is connected to link 31 to form an upper knee-joint and link 34 is connected to link 36 to form a lower knee-joint. Said upper knee-joint 30/31 and lower knee-joint 34/36 being interconnected by pivot 22 to central vertical bar 37, to maintain a parallel relationship between the two sets ,,, ; c-of links and also to permit folding and unfolding of the lower knee-joint 34/36 simultaneously with the folding or unfolding of the upper knee-joint 30/31. The vertical link 37 is provided with a loop 27 at its uppermost end to facilitate folding or unfolding of the sleigh.
,,,,, .. -:~0627S~
One link 31 is provided with a shoulder lock 32 at the upper side, adapted to contact with the corresponding connected link 30 at the knee-joint, therefore limiting the downward swing or movement thereof to a horizontal line, equally providing a sa~ety lock when the sleigh is in the opened position.
As shown in Fig. 8 and 11, in one particular embodi-ment of this invention, links 30 and 31 are curved rearwardly to allow sufficient back clearance for the occupant of the 10 sleigh.
The rear set of cross bars 25 and 26 are used to bring the runners together as the supporting frame is folded front-wardly and downwardly on to the top of the runners, and also to prevent sideway swing of the rear vertical tubular pieces 12 Openin~ o~ the sleigh is accomplished by pulling upward on the loop 27 until the tubular pieces 12 rom~ into contact with the stop 38; then pushing downward on both stop -~
locks 32 to lock the mechanism in safe operational position.
Folding of the sleigh is accomplished by pullins simultaneously upward on the stop locks 32, then pushing forward on the loop 27 to collapse the entire frame forward on top of the runners while said runners are moved towards each other.
' ~.' ' ~ -::
-- 8 -- . .
.. . .
~ ................................................................... : .
---` illq~627~i~
1 Therefore, as described hereabove I have invented a new collapsible supporting frame and folding mechanism which have particular application in collapsible sleighs but may also find application in other structures. While the invention has been illustrated in relation to a collapsible sleigh, it will be obvious that it is susceptible to some changes and modifi-cations and of applications to other structures without departing from the principles and spirit thereof and for this reason I
do not wish to be limited to the precise arrangement, formation and structure of the several parts of the folding mechanism herein shown, except as claimed.
For example, the runners could be replaced by skis, blades, floaters or other rigid members. Similarly, wheels or anchor means could be attached to such rigid members or near the lower end of the vertical tubular pieces 11 and 12.
. : .
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Claims (23)
1. A collapsible supporting frame comprising:
i) foldable side assemblies comprising vertically spaced substantially horizontal members, pivotally attached to substantially vertical members;
ii) collapsible means connecting said foldable side assemblies to each other;
iii)rigid members which are substantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members; and iv) means to restrain unwanted collapsing of said collapsible means.
i) foldable side assemblies comprising vertically spaced substantially horizontal members, pivotally attached to substantially vertical members;
ii) collapsible means connecting said foldable side assemblies to each other;
iii)rigid members which are substantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members; and iv) means to restrain unwanted collapsing of said collapsible means.
2. A collapsible supporting frame according to claim 1, said collapsible means including one front and one rear set of cross bars, each forming an "X" in the open position, each said bar having one end pivotally attached to a said vertical member while the other end is pivotally attached to one of said rigid members.
3. A collapsible supporting frame according to claim 2 wherein the cross bars which form each said set of cross bars are pivotally connected to each other at their junction point.
4. A collapsible supporting frame according to claim 3 wherein said front set of cross bars forms a small angle with said runners and said rear set of cross bars is generally perpendicular to said runners.
5. A collapsible supporting frame according to claim 3 wherein a stop is provided to limit rearward movement of said vertical members when said supporting frame is in its erect position.
6. A collapsible supporting frame according to claim 4 wherein said collapsible supporting frame folds forwardly and downwardly on top of said rigid members and simultaneously brings said rigid members together.
7. A collapsible supporting frame according to claim 1 or 3 or 5 wherein said vertically spaced horizontal members comprise one upper and one lower horizontal member which are attached at the end to said vertical members.
8. A collapsible supporting frame according to claim 1, 3 or 5 wherein said collapsible supporting frame collapses and folds in one single operation after unlocking of said collapsing restraining means.
9. A collapsible supporting frame according to claim 1, 3 or 5 wherein an occupant or load supporting means is attached to said supporting frame.
10. A collapsible supporting frame according to claim 1, 3 or 5 wherein said rigid members are surface contact means whereby contact, movable or still, is made with the surface over which it is located or displaced.
11. A collapsible supporting frame according to claim 1, 3 or 5 wherein said rigid members are skis.
12. A collapsible supporting frame according to claim 1, 3 or 5 wherein said rigid members are blades.
13. A collapsible supporting frame according to claim 1, 3 or 5 wherein said rigid members are floaters.
14. A collapsible supporting frame according to claim 1, 3 or 5 wherein wheels are attached to said rigid members or near the lower end of said substantially vertical members.
15. A collapsible supporting frame according to claim 1, 3 or 5 wherein anchor means are connected to said rigid members or near the lower end of said substan-tially vertical members.
16. A sleigh having a collapsible supporting frame comprising:
i) foldable side assemblies comprising vertically spaced substantially horizontal members, pivotally attached to substantially vertical members;
ii) collapsible means connecting said foldable side assemblies to each other;
iii) runners which are substantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members; and i) means to restrain unwanted collapsing of said collapsible means.
i) foldable side assemblies comprising vertically spaced substantially horizontal members, pivotally attached to substantially vertical members;
ii) collapsible means connecting said foldable side assemblies to each other;
iii) runners which are substantially parallel to said horizontal members and which are pivotally connected to the lower end of said vertical members; and i) means to restrain unwanted collapsing of said collapsible means.
17. A sleigh according to claim 16, wherein said collapsible means includes one front and one rear set of cross bars, each forming an "X" in the open position, each said bar having one end pivotally attached to a said vertical member while the other end is pivotally attached to one of said runners.
18. A sleigh according to claim 17 wherein the cross bars which form each said set of cross bars are pivotally connected to each other at their junction point.
19. A sleigh according to claim 18 wherein said front set of cross bars form a small angle with said runners and wherein said rear set of cross bars is generally perpen-dicular to said runners.
20. A sleigh according to claim 18 wherein a stop is provided to limit rearward movement of said vertical members when said supporting frame is in its erect position.
21. A sleigh according to claim 20 wherein said collapsible supporting frame folds forwardly and down-wardly on top of said runners and simultaneously brings said runners together.
22. A sleigh according to claim 16, 18 or 21 wherein said vertically spaced horizontal members comprise one upper and one lower horizontal member which are attached at the end to said vertical members.
23, A sleigh according to claim 16, 18 or 21 wherein said collapsible supporting frame collapses and folds in one single operation after unlocking of said collapsing restraining means.
23, A sleigh according to claim 16, 18 or 21 wherein said collapsible supporting frame collapses and folds in one single operation after unlocking of said collapsing restraining means.
23. A sleigh according to claim 16, 18 or 21 wherein an occupant or load supporting means is attached to said supporting frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA255,583A CA1062750A (en) | 1976-06-24 | 1976-06-24 | Collapsible supporting frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA255,583A CA1062750A (en) | 1976-06-24 | 1976-06-24 | Collapsible supporting frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1062750A true CA1062750A (en) | 1979-09-18 |
Family
ID=4106278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA255,583A Expired CA1062750A (en) | 1976-06-24 | 1976-06-24 | Collapsible supporting frame |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1062750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1707468A3 (en) * | 2005-04-01 | 2007-08-01 | Heringer, Bernhard | Collapsable sledge |
-
1976
- 1976-06-24 CA CA255,583A patent/CA1062750A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1707468A3 (en) * | 2005-04-01 | 2007-08-01 | Heringer, Bernhard | Collapsable sledge |
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