CA2221947C - Retractable roof support - Google Patents
Retractable roof support Download PDFInfo
- Publication number
- CA2221947C CA2221947C CA 2221947 CA2221947A CA2221947C CA 2221947 C CA2221947 C CA 2221947C CA 2221947 CA2221947 CA 2221947 CA 2221947 A CA2221947 A CA 2221947A CA 2221947 C CA2221947 C CA 2221947C
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- Canada
- Prior art keywords
- shaft
- spherical surface
- ring
- sleeve
- roof
- 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 - Fee Related
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
Apparatus for pivotally supporting a retractable roof of a building is provided The apparatus includes a support mechanism for the roof which is fixedly supported by at least one bracket projecting from the building side. It also has a shaft which is the center of retraction of the retractable roof, and whichslidably supports a sleeve by a radial bearing and by a thrust bearing. The radial and thrust bearings each has a spherical surface located at selected portions of the shaft.
Description
RETRACTABLE ROOF SUPPORT
BACKGROUND OF TIIE INVENTION
The present invention relates to a retractable roof. More particularly, the present invention relates to a support for a semicircular retractable roof.
In detail, it relates to a shaft which supports a semicircular retractable roof used for a stadium or arena which can accommodate a baseball game or other events. The appa~LIls incorporating the principles of the present invention is specifically related to a shaft which can support a semicircular retractable roof having retractable telescoping roof panels and frames wherein the shaft is exposed to a large hol izolllal and vertical load while it absorbs distortion of the frame due to thermal expansion, etc.
As shown in Figures 3(a) and 3(b), a retractable roof 10 of a stadium 1, for example, comprises:
retractable sector partition panels 11 and 12, fixed panels 13 on both ends; wherein each of the panels 11, 12, and 13 are supported with stepped frames F.
The ends of the retractable sector partition panels 11 and 12 are supported and positioned by a drive mechanism 15, chain, and the like, and are retracted or pivoted along a portion of a circular rail R laid along the side or roof portion oftl~.e building to be covered by the roof.
An example of the structure of the center for moving the roof panels is shown in Figure 4. A shaft 121 is fixed on a leveled foundation 111, on the roof portion of the building of stadium I, projecting from the building side. The top of the shaft 121 is fixed by a bracket 112 also mounted on the foundation and projected at an angle therewith.
A sleeve 125, at the center of the roof frame F, which is capable of semicircular retraction, is fitted into the shaft 121 with a large gap therebetween and is supported by the shaft, at the middle thereof by a radial spherical bearing 130. A c~nvex spherical surface ring 131 is attached to the outer surface ofthe shaft 121 and a concave spherical surface ring 132 is attached to the inside ofthe sleeve 125.
The shaft 121 of the semicircular retractable roof of conventional technology, even if panels 11, 12, and 13 and their roof frames F are structuredsuch that a drive mecl~ ... or a winch is heavily loaded, is exposed to externalstress from twisting, lifting or tension forces when the roof is exposed to the temperature difference between daytime and night which causes the thermal expansion or thermal shrinkage of the roof and also when there is a displacementand the like between the drive mech~ni~m or winch on the end of the roof and the rail.
The bearing 130 on shaft 121 supports and absorbs most of the external force by its maneuverability and support capability. However, the weight of the roof is not supported appropriately enough and then there is a risk of rl~m~gin~ the roo~ If the roof is damaged, a costly repair will be required. One way of avoiding such damage is to increase the size ofthe shaft, but this is a drawback.
The shaft must be a vely sturdy, robust shaft, and there is a limit to how large it can be made while m~in~ g its cost at a reasonable amount.
S SUMMARY OF THE INVE:NTION
It is accordingly an object of the present invention to overcome the problems presented by prior art solutions.
The apparatus incorporating the principles of the present invention provides appa~ s for pivotally supporting a retractable roof utili~ing a shaft without increasing the size of the sha~, and which is still capable of accommodating vertical load while absorbing distortion of the roof frame against the shaft, thus increasing the durability of the sha~.
To resolve the above problems, the appa~ s incorporating the principles Gf the present invention provides a shaft for a semicircular retractable roof wherein the shaft is fixedly supported at least at its bottom by a bracket projecting from the side of the roof portion of a building. The shaft slidably supports a sleeve via a radial bearing having a sphencal surface at the middte of the shaft and the bracket slidably supports the sleeve in an inclined angle via a thlust bearing having a spherical surface around the robust shaft.
In a ~lerel,~d embodiment, the present invention relates to apparatus ~or pivotally supporting a retractable roof of a building, and having at least a first bracket fixedly mounted on a vertical side of the building and extP.ntling sub~lànlially holi~olltally from the side. l'he apparalus also includes a substantially vertical shaft having a top and a bottom end and being fixedly mounted at least at its bottom end on the first bracket. A sleeve having a top and bottom end is included The sleeve is pivotally supported on the shaft by a radial bearing and on the bracket by a thrust bearing. The radial bearing has a substantially spherical surface and is mounted on the shaft substantially equidistant between the top and bottom ends of the shaft. The thrust bearing has a spherical surface around the shaft.
In a further pref~l-ed embodiment, the thrust bearing is mounted at the bottom end of the sleeve.
In another embodiment, a second bracket is mounted on the vertical side of the building and the top end of the shaft is mounted on the second bracket.
The shaft for the semicircular retractable roof with the above configuration acts as the center of a retractable roof frame. It can also absorb the distortion of the roof frame, during and after retraction, via the bea,ings having a spherical surface at the middle and bottom portions of the shaft, with the presence of a gap between the sleeve and the shaft. This protects the shaft from unfavorable loading. In addition, the lower thrust bearing having a spherical surface improves the capability to support against vertical load without increasing the size of the radial bearing having a spherical surface located in the center of the shaft. This also helps to provide a compact durable and easy-to-be serviced unit.
In a further preferred embodiment, the radial bearing having a ~,hel i~l surface includes a first ring having a convex spherical surface attached to the outer surface of the shaft. Also included is a second ring having a concave spherical surface coope- ~ling with the convex spherical surface of the first ring and being attac~ed to the inner surface of the sleeve. A thrust bearing is provided having a spherical surface including a third ring having a convex spherical surface attached to the bottom of the sleeve, and a fourth ring having a concave spherical surface cooperating with the convex spherical surface of the third ring and being attached to the bracket. In this way, a large thrust load can be accommodated with some lubrication using grease and the like which is easily available in the market.
In another plefel led embodiment, the center of the radial bearing, which has ~ spherical surface and the center of the thrust bearing, which has a spherical surface coincide and lie along the centerline of the sha~ so that the sha~
can slidably support the sleeve smoothly.
- BRIEF DESC~IPTION OF T~E DRAWINGS
The above and other objects, features, and advantages of the present invention will become more appa~ enl from the following detailed description taken with the accompanying drawings, in which:
Figure 1 is an elevational view, partially in cross-section, showing the structure of a support sha~ of a semicircular retractable roof in accordance with an embodiment of the present invention;
Figure 2, cont~in~ Figures 2(a) and 2(b), are elevational views, partially in cross-section; Figure 2(a) shows how the support shaft of the semicircular; etractable roof supports a vertical load, and Figure 2(b) shows how the support shaft of the semicircular retractable roof supports a horizontal load;
S Figure 3, cont~ining Figures 3(a) and 3(b), shows a semicircular retractable roofused in a st~dillm; Figure 3(a) is a plan view, and Figure 3(b) is an elevational view of the support portion for its retracting frame; and Figure 4 is an elevational view showing the structure of a support shaft of a spiral semicircular retractable roof using conventional technology.
DE~CRIPTION OF T~E PREFERRED EMBODIlVIENTS
Referring to the drawings, Figures 1 and 2 show the support mechanism 2 of a semicircular retractable roof of a prer~., ed embodiment of thepresent invention as used for semicircular retractable roof 10, as shown in Figure 3, of a stadium where events such as a baseball game are held.
First, semicircular retractable roof 10, which is illustrated in Figure 3, includes: retractable sector partition panels 11 and 12, and fixed panels 13 on both ends. Each ofthe panels 11, 12, and 13 are supported with stepped frames F,as shown in Figure 3(b). The ends of retractable sector partition panels 11 and 12 are supported and positioned by a drive "~ecl~nicm 15 and are retracted along a portion of a circular rail R laid on the building side.
As illustrated in Figures 1 and 2, the support meçh~nicm 2, around which the semicircular retractable roof retracts, includes: a shaft 20 and brackets 31 and 32, which project horizontally from the building side. The support m~ h~nicmalso includes threaded portions 21 and 22 (see Figure 1) formed on the top and bottom of the shaft 20 for firmly tightening the brackets 31 and 32 by means of nuts N on the top and bottom of the shaft 20 to the roof portion of building 3.
Further, the mechanislll 2 has connected thereto the roof frame F,, which is slidably movable along a sleeve 40, into which the robust shaft 20 is fitted with gap G such that it can act as the retraction center. A radial bearing 24 having a spherical surface is located substantially equidistant between the ends of shaft 20 for supporting sleeve 40 thereon. Finally, mechanism 2 includes a thrust bearing 27 having a spherical surface located on the lower bracket 32 around the shaft 20 for supporting sleeve 40 thereon.
Any slanting due to deforrnation of roof frame F is absorbed within the sleeve 40 and gap G via bearings 24 and 27, each having a spherical surface,and which are located in the center and at the bottom respectively of shaft 20 to avoid loading unwanted force onto shaft 20.
Thrust bearing 27 has a spherical surface to help to improve its ability to support against a vertical load without increasing the size of the radial bearing 24, which has a spherical surface, located at the center of sha~ 20. This also helps to provide a compact durable and easy-to-be-serviced unit.
A first ring 24A of radial bearing 24 has a convex spherical surface and is located substantially equidistant between the top and bottom ends of shaft 20. Ring 24A is attached to the outer surface of a small outer diameter portion 20A
of sha~ 20. It is pushed downwardly by thrust collar 25 against a shoulder 20B of shaft 20. A second ring 24B, having a convex surface coope~ling with the first ring 24A, is attached to the inner surface of large diameter portion 40A of sleeve 40 and pushed upwardly by thrust collar 26 against shoulder 40B which is formed on the imlel surface of large inner diameter portion 40A of sleeve 40.
A third ring 27A, having a concave spherical surface corresponding to the spherical surface 27 of the bottom thrust bearing, is fixedly mounted on lower brack~t 32. A fourth ring 27B, having a convex spherical surface cooperating with the third ring 27A, is fixedly mounted on the bottom end of the sleeve 40. The spherical s- rface portion is lubricated with grease etc. which is easily available.
In addition, it is preferable that the center of the sphere corresponding to the spherical surface of radial bearing 24 coincide with the center of the sphere corresponding to the spherical surface of the thrust bearing 27.
Furthermore, the coinciding center of each of these spheres should preferably belocated subst~nti~lly along the centerline of shaft 20 in order to smoothly slidably support sleeve 40.
In additional embodiments, the robust shaft 20 can be constructed with large bolts. It can be attached through the hole in upper bracket 31 to be threaded into the screw hole of lower bracket 32. It is also possible to mount the shaft 20 solely on the lower bracket 32 without using a second bracket 31.
As described in detail above, the retractable roof can pivot about shaft 20 which provides the center for the pivotal movement of the roof frame which retracts. It can also absorb any force applied to the shaft caused by the distortion of the roof frame, during and after retraction, via the bearings bothhaving a spherical surface, positioned at the center and bottom portions of the sha~, with the presence of the gap between the sleeve and the shaft. This protects S the shaft from unfavorable loading.
The lower thrust bearing having a spherical surface helps to improve the capability to support against a vertical load without increasing the size of the radial bearing, which has a spherical surface, located in the center of shaft 20. This also helps to provide a compact durable and easy-to-be-serviced unit.
Various modifications will become possible for those skilled in the art after receiving the teachings of the present disclosure without depal ling from the scope thereof.
BACKGROUND OF TIIE INVENTION
The present invention relates to a retractable roof. More particularly, the present invention relates to a support for a semicircular retractable roof.
In detail, it relates to a shaft which supports a semicircular retractable roof used for a stadium or arena which can accommodate a baseball game or other events. The appa~LIls incorporating the principles of the present invention is specifically related to a shaft which can support a semicircular retractable roof having retractable telescoping roof panels and frames wherein the shaft is exposed to a large hol izolllal and vertical load while it absorbs distortion of the frame due to thermal expansion, etc.
As shown in Figures 3(a) and 3(b), a retractable roof 10 of a stadium 1, for example, comprises:
retractable sector partition panels 11 and 12, fixed panels 13 on both ends; wherein each of the panels 11, 12, and 13 are supported with stepped frames F.
The ends of the retractable sector partition panels 11 and 12 are supported and positioned by a drive mechanism 15, chain, and the like, and are retracted or pivoted along a portion of a circular rail R laid along the side or roof portion oftl~.e building to be covered by the roof.
An example of the structure of the center for moving the roof panels is shown in Figure 4. A shaft 121 is fixed on a leveled foundation 111, on the roof portion of the building of stadium I, projecting from the building side. The top of the shaft 121 is fixed by a bracket 112 also mounted on the foundation and projected at an angle therewith.
A sleeve 125, at the center of the roof frame F, which is capable of semicircular retraction, is fitted into the shaft 121 with a large gap therebetween and is supported by the shaft, at the middle thereof by a radial spherical bearing 130. A c~nvex spherical surface ring 131 is attached to the outer surface ofthe shaft 121 and a concave spherical surface ring 132 is attached to the inside ofthe sleeve 125.
The shaft 121 of the semicircular retractable roof of conventional technology, even if panels 11, 12, and 13 and their roof frames F are structuredsuch that a drive mecl~ ... or a winch is heavily loaded, is exposed to externalstress from twisting, lifting or tension forces when the roof is exposed to the temperature difference between daytime and night which causes the thermal expansion or thermal shrinkage of the roof and also when there is a displacementand the like between the drive mech~ni~m or winch on the end of the roof and the rail.
The bearing 130 on shaft 121 supports and absorbs most of the external force by its maneuverability and support capability. However, the weight of the roof is not supported appropriately enough and then there is a risk of rl~m~gin~ the roo~ If the roof is damaged, a costly repair will be required. One way of avoiding such damage is to increase the size ofthe shaft, but this is a drawback.
The shaft must be a vely sturdy, robust shaft, and there is a limit to how large it can be made while m~in~ g its cost at a reasonable amount.
S SUMMARY OF THE INVE:NTION
It is accordingly an object of the present invention to overcome the problems presented by prior art solutions.
The apparatus incorporating the principles of the present invention provides appa~ s for pivotally supporting a retractable roof utili~ing a shaft without increasing the size of the sha~, and which is still capable of accommodating vertical load while absorbing distortion of the roof frame against the shaft, thus increasing the durability of the sha~.
To resolve the above problems, the appa~ s incorporating the principles Gf the present invention provides a shaft for a semicircular retractable roof wherein the shaft is fixedly supported at least at its bottom by a bracket projecting from the side of the roof portion of a building. The shaft slidably supports a sleeve via a radial bearing having a sphencal surface at the middte of the shaft and the bracket slidably supports the sleeve in an inclined angle via a thlust bearing having a spherical surface around the robust shaft.
In a ~lerel,~d embodiment, the present invention relates to apparatus ~or pivotally supporting a retractable roof of a building, and having at least a first bracket fixedly mounted on a vertical side of the building and extP.ntling sub~lànlially holi~olltally from the side. l'he apparalus also includes a substantially vertical shaft having a top and a bottom end and being fixedly mounted at least at its bottom end on the first bracket. A sleeve having a top and bottom end is included The sleeve is pivotally supported on the shaft by a radial bearing and on the bracket by a thrust bearing. The radial bearing has a substantially spherical surface and is mounted on the shaft substantially equidistant between the top and bottom ends of the shaft. The thrust bearing has a spherical surface around the shaft.
In a further pref~l-ed embodiment, the thrust bearing is mounted at the bottom end of the sleeve.
In another embodiment, a second bracket is mounted on the vertical side of the building and the top end of the shaft is mounted on the second bracket.
The shaft for the semicircular retractable roof with the above configuration acts as the center of a retractable roof frame. It can also absorb the distortion of the roof frame, during and after retraction, via the bea,ings having a spherical surface at the middle and bottom portions of the shaft, with the presence of a gap between the sleeve and the shaft. This protects the shaft from unfavorable loading. In addition, the lower thrust bearing having a spherical surface improves the capability to support against vertical load without increasing the size of the radial bearing having a spherical surface located in the center of the shaft. This also helps to provide a compact durable and easy-to-be serviced unit.
In a further preferred embodiment, the radial bearing having a ~,hel i~l surface includes a first ring having a convex spherical surface attached to the outer surface of the shaft. Also included is a second ring having a concave spherical surface coope- ~ling with the convex spherical surface of the first ring and being attac~ed to the inner surface of the sleeve. A thrust bearing is provided having a spherical surface including a third ring having a convex spherical surface attached to the bottom of the sleeve, and a fourth ring having a concave spherical surface cooperating with the convex spherical surface of the third ring and being attached to the bracket. In this way, a large thrust load can be accommodated with some lubrication using grease and the like which is easily available in the market.
In another plefel led embodiment, the center of the radial bearing, which has ~ spherical surface and the center of the thrust bearing, which has a spherical surface coincide and lie along the centerline of the sha~ so that the sha~
can slidably support the sleeve smoothly.
- BRIEF DESC~IPTION OF T~E DRAWINGS
The above and other objects, features, and advantages of the present invention will become more appa~ enl from the following detailed description taken with the accompanying drawings, in which:
Figure 1 is an elevational view, partially in cross-section, showing the structure of a support sha~ of a semicircular retractable roof in accordance with an embodiment of the present invention;
Figure 2, cont~in~ Figures 2(a) and 2(b), are elevational views, partially in cross-section; Figure 2(a) shows how the support shaft of the semicircular; etractable roof supports a vertical load, and Figure 2(b) shows how the support shaft of the semicircular retractable roof supports a horizontal load;
S Figure 3, cont~ining Figures 3(a) and 3(b), shows a semicircular retractable roofused in a st~dillm; Figure 3(a) is a plan view, and Figure 3(b) is an elevational view of the support portion for its retracting frame; and Figure 4 is an elevational view showing the structure of a support shaft of a spiral semicircular retractable roof using conventional technology.
DE~CRIPTION OF T~E PREFERRED EMBODIlVIENTS
Referring to the drawings, Figures 1 and 2 show the support mechanism 2 of a semicircular retractable roof of a prer~., ed embodiment of thepresent invention as used for semicircular retractable roof 10, as shown in Figure 3, of a stadium where events such as a baseball game are held.
First, semicircular retractable roof 10, which is illustrated in Figure 3, includes: retractable sector partition panels 11 and 12, and fixed panels 13 on both ends. Each ofthe panels 11, 12, and 13 are supported with stepped frames F,as shown in Figure 3(b). The ends of retractable sector partition panels 11 and 12 are supported and positioned by a drive "~ecl~nicm 15 and are retracted along a portion of a circular rail R laid on the building side.
As illustrated in Figures 1 and 2, the support meçh~nicm 2, around which the semicircular retractable roof retracts, includes: a shaft 20 and brackets 31 and 32, which project horizontally from the building side. The support m~ h~nicmalso includes threaded portions 21 and 22 (see Figure 1) formed on the top and bottom of the shaft 20 for firmly tightening the brackets 31 and 32 by means of nuts N on the top and bottom of the shaft 20 to the roof portion of building 3.
Further, the mechanislll 2 has connected thereto the roof frame F,, which is slidably movable along a sleeve 40, into which the robust shaft 20 is fitted with gap G such that it can act as the retraction center. A radial bearing 24 having a spherical surface is located substantially equidistant between the ends of shaft 20 for supporting sleeve 40 thereon. Finally, mechanism 2 includes a thrust bearing 27 having a spherical surface located on the lower bracket 32 around the shaft 20 for supporting sleeve 40 thereon.
Any slanting due to deforrnation of roof frame F is absorbed within the sleeve 40 and gap G via bearings 24 and 27, each having a spherical surface,and which are located in the center and at the bottom respectively of shaft 20 to avoid loading unwanted force onto shaft 20.
Thrust bearing 27 has a spherical surface to help to improve its ability to support against a vertical load without increasing the size of the radial bearing 24, which has a spherical surface, located at the center of sha~ 20. This also helps to provide a compact durable and easy-to-be-serviced unit.
A first ring 24A of radial bearing 24 has a convex spherical surface and is located substantially equidistant between the top and bottom ends of shaft 20. Ring 24A is attached to the outer surface of a small outer diameter portion 20A
of sha~ 20. It is pushed downwardly by thrust collar 25 against a shoulder 20B of shaft 20. A second ring 24B, having a convex surface coope~ling with the first ring 24A, is attached to the inner surface of large diameter portion 40A of sleeve 40 and pushed upwardly by thrust collar 26 against shoulder 40B which is formed on the imlel surface of large inner diameter portion 40A of sleeve 40.
A third ring 27A, having a concave spherical surface corresponding to the spherical surface 27 of the bottom thrust bearing, is fixedly mounted on lower brack~t 32. A fourth ring 27B, having a convex spherical surface cooperating with the third ring 27A, is fixedly mounted on the bottom end of the sleeve 40. The spherical s- rface portion is lubricated with grease etc. which is easily available.
In addition, it is preferable that the center of the sphere corresponding to the spherical surface of radial bearing 24 coincide with the center of the sphere corresponding to the spherical surface of the thrust bearing 27.
Furthermore, the coinciding center of each of these spheres should preferably belocated subst~nti~lly along the centerline of shaft 20 in order to smoothly slidably support sleeve 40.
In additional embodiments, the robust shaft 20 can be constructed with large bolts. It can be attached through the hole in upper bracket 31 to be threaded into the screw hole of lower bracket 32. It is also possible to mount the shaft 20 solely on the lower bracket 32 without using a second bracket 31.
As described in detail above, the retractable roof can pivot about shaft 20 which provides the center for the pivotal movement of the roof frame which retracts. It can also absorb any force applied to the shaft caused by the distortion of the roof frame, during and after retraction, via the bearings bothhaving a spherical surface, positioned at the center and bottom portions of the sha~, with the presence of the gap between the sleeve and the shaft. This protects S the shaft from unfavorable loading.
The lower thrust bearing having a spherical surface helps to improve the capability to support against a vertical load without increasing the size of the radial bearing, which has a spherical surface, located in the center of shaft 20. This also helps to provide a compact durable and easy-to-be-serviced unit.
Various modifications will become possible for those skilled in the art after receiving the teachings of the present disclosure without depal ling from the scope thereof.
Claims (6)
1. Apparatus for pivotally supporting a retractable roof of a building, comprising in combination:
at least a first bracket fixedly mounted on a vertical side of said building and extending substantially horizontally from said side;
a substantially vertical shaft arranged at the center of said retractable roof having a top and a bottom end and being fixedly mounted at least at said bottom end on said first bracket; and a sleeve having a top and bottom end and being pivotally supported on said shaft by a radial bearing and a thrust bearing, said radial bearing having a substantially spherical surface and being mounted on said shaft substantially equidistant between said top and bottom ends thereof, and said thrust bearing having a spherical surface around said shaft.
at least a first bracket fixedly mounted on a vertical side of said building and extending substantially horizontally from said side;
a substantially vertical shaft arranged at the center of said retractable roof having a top and a bottom end and being fixedly mounted at least at said bottom end on said first bracket; and a sleeve having a top and bottom end and being pivotally supported on said shaft by a radial bearing and a thrust bearing, said radial bearing having a substantially spherical surface and being mounted on said shaft substantially equidistant between said top and bottom ends thereof, and said thrust bearing having a spherical surface around said shaft.
2. Apparatus, as claimed in claim 1, wherein said thrust bearing is mounted at said bottom end of said sleeve.
3. Apparatus, as claimed in claim 1 or 2, wherein a second bracket is mounted on said vertical side of said building and said top end of said shaft is mounted on said second bracket.
4. Apparatus, a claimed in claim 1, 2 or 3, wherein said spherical surface of said radial bearing includes a first ring having a convex spherical surface and being attached to the outer surface of said shaft; a second ring having a concave spherical surface cooperating with said convex spherical surface of said first ring and being attached to the inner surface of said sleeve;
and wherein said spherical surface of said thrust bearing includes a third ring having a corvex spherical surface attached to said bottom end of said sleeve; and a fourth ring having a concave spherical surface cooperating with said convex spherical surface of said third ring and being attached to said first bracket.
and wherein said spherical surface of said thrust bearing includes a third ring having a corvex spherical surface attached to said bottom end of said sleeve; and a fourth ring having a concave spherical surface cooperating with said convex spherical surface of said third ring and being attached to said first bracket.
5. Apparatus, as claimed in claim 1, 2, 3 or 4, wherein said shaft has a centerline, and wherein the center of said spherical surface of said radial bearing and the center of said spherical surface of said thrust coincide and are located substantially along said centerline of said shaft.
6. Apparatus, as claimed in claim 3, 4, or 5, wherein said shaft is detachably supported by threaded means between said first and second brackets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2221947 CA2221947C (en) | 1996-11-26 | 1997-11-24 | Retractable roof support |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP314427-96 | 1996-11-26 | ||
| JP31442796A JP3504815B2 (en) | 1996-11-26 | 1996-11-26 | Support shaft for swiveling openable roof |
| CA 2221947 CA2221947C (en) | 1996-11-26 | 1997-11-24 | Retractable roof support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2221947A1 CA2221947A1 (en) | 1998-05-26 |
| CA2221947C true CA2221947C (en) | 2000-01-25 |
Family
ID=31716414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2221947 Expired - Fee Related CA2221947C (en) | 1996-11-26 | 1997-11-24 | Retractable roof support |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2221947C (en) |
-
1997
- 1997-11-24 CA CA 2221947 patent/CA2221947C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2221947A1 (en) | 1998-05-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |