CA1210416A - Pool barrier for skating rinks and panel therefor - Google Patents
Pool barrier for skating rinks and panel thereforInfo
- Publication number
- CA1210416A CA1210416A CA000432366A CA432366A CA1210416A CA 1210416 A CA1210416 A CA 1210416A CA 000432366 A CA000432366 A CA 000432366A CA 432366 A CA432366 A CA 432366A CA 1210416 A CA1210416 A CA 1210416A
- Authority
- CA
- Canada
- Prior art keywords
- panel
- panels
- length
- area
- water
- 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
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
- A63C19/00—Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor
- A63C19/10—Ice-skating or roller-skating rinks; Slopes or trails for skiing, ski-jumping or tobogganing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
TITLE
POOL BARRIER FOR SKATING RINKS
AND PANEL THEREFOR
INVENTOR
Italo BERTONI
ABSTRACT
A metal barrier, preferably galvanized, composed of identical members with notches to form a unique interlock that also provides a flexing joint to a degree, yet provides adequate inherent stability. If the barrier elements, or panels, are dimensioned into different sizes, a plurality of panels may be used for the marginal walls a swimming pool or for a skating rink. With a skating rink, a circumferential protective shield is also placed over it so as to protect, a water impervious inner liner from damage by skate or puck.
POOL BARRIER FOR SKATING RINKS
AND PANEL THEREFOR
INVENTOR
Italo BERTONI
ABSTRACT
A metal barrier, preferably galvanized, composed of identical members with notches to form a unique interlock that also provides a flexing joint to a degree, yet provides adequate inherent stability. If the barrier elements, or panels, are dimensioned into different sizes, a plurality of panels may be used for the marginal walls a swimming pool or for a skating rink. With a skating rink, a circumferential protective shield is also placed over it so as to protect, a water impervious inner liner from damage by skate or puck.
Description
~2~4~6 This invention relates to a panel, which in one application is for water and particularly to pool water so that in freezing conditions, a frozen sheet of ice is formed for skating and the like.
In Canada and the upper states of the United States of America, winter is generally a long period of time and ice skating is a popular winter sport.
In the Great Lakes area of North America, particularly, there are significant freezing and thawing cycles from mid-November to early April, that in order to create and maintain an outdoor ice skating rink or pad, a "cold" winter, without significant thawing cycles is preferred. Such climatic conditions during winter appear occasionally as for example, the winter season of 1978-79. When a winter season has significant thawing cycles therethrough, during thawing, the ice pad or rink melts and the water runs off into the surrounding ground.
Also, if the ice pad is placed on grass, and winter flooding is commenced prior to either the ground having frozen solid and to a depth of several centimeters, the water will penetrate into the ground during attempted flooding, and is lost. Further, if there are no embankments about the perimeter of the ice pad to be formed, the water cannot be "layered" on to build up the ice, unless the temperatures are between 0F and 10F (approximately -15C). Without these temperatures, it is difficult to build up the base because the water runs off during attempted flooding. At these cold temperatures, which is preferred for flooding, the water almost instantly freezes on impact, or solidifies to such a degree that running off during flooding does not take place, and it is easy to build up the ice reasonably quickly.
There are other disadvantages to existing natural ice rinks as those who have tried to make ice rinks for their children in their own backyard will attest.
Other common complaints occur when there is very significant cold weather and a garden hose is used as the water conveying conduit for delivering water for flooding.
" '`` ~
Because of the low volume passing through the small diameter of the hose (approximately 3 centimeters internal diameter), the surround of the hose gets cold and the hose itself freezes up. Further, if wooden barriers, using 2 x 4's or the like, are used, the wood after several seasons warps, splits, or cracks, and the members have to be replaced.
All of the aforesaid objections to existing outdoor skating rinks and the problem of flooding and maintaining the same is avoided by this invention since it achieves a means by which water may be pooled in the late fall and contained there through the winter during which time it freezes naturally into a sheet of ice thereby allowing ice skating or ice hockey or curling. When a thawing cycle transpires momentarily through the winter season, the rink may be converted back into water but -the water does not run away and is thus available for refreezing when it gets cold again and the thawing cycle passes. In the early spring it is simple to remove the barrier and to allow the water to run away naturally.
In that aspect the invention achieves a metal barrier, preferably galvanized, composed of identical members with notches to form a unique interlock that also provides a flexing joint to a degree, yet provides adequate inherent inner stability. If the barrier elements, or panels, are dimensioned into different sizes, a plurality of panels may be used for the marginal walls a swimming pool.
The invention therefore contemplates a panel comprising a single sheet of rigid material having opposite marginal ends bent in the same direction, and a slot defined by each bend, the slot extending in length in the bend sufficient to accommodate a similar slot of a second panel, whereby two of said panels may be articulatingly latched at the bends by nesting the respective slots on adjacently disposed bends.
In my preferred embodiment, the invention contemplates a skating rink comprising a plurality of panels adjacently disposed marginal end to marginal end to thereby trace out (a) a closed perimeter with internal area;
(b) a water impervious sheet extending over said area - ~z~
against the inner marginal surface of the panels, and lapping over the upper margin of the perimeter;
(c) means for restraining the water impervious sheet on the perimeter thereby to hold the sheet relatively fixed to the perimeter and area;
(d) a rigid sheet of material suspended from the upper perimeter lip and extending down over the inner perimeter of the surface a predetermined distance, the second panel member having a lower distal end which extends toward the area a predetermined distance, so that when water is placed on the water impervious sheet, a pool of water is created therein and the distal end of the second panel is submerged therein.
The invention will now be described by way of example with reference to the accompanying drawings in which, Figure 1 is a perspective of a typical barrier layout, illustrative of the sequence of assembly, according to my invention.
Figure 2 is an assembly view of interlocking panels used to form a perimeter wall.
Figure 3 is a section along lines III-III of figure 1 being a cross-section through the perimeter wall when assembled~
Figure 4 is a plan view of the anchorage mechanism for the perimeter walll Referring to figure 1, a skating rink 10 defines an inner area 11 and is bounded thereabout by my novel perimeter wall 12.
The perimeter wall is composed of rigid interlocking upstanding panels 15 preferably made of galvanized sheet steel. The panels have opposite ends 17 and 18 flanged through a bend, in the same direction, where a recess or slot is defined in each end, one slot 19 is formed at the bend at end 17, and a mirror slot 20 at the bend of end 18, as clearly seen in figure 2. Thus the panel member comprises a single sheet of rigid material having opposite marginal ends bent in the same direc~ion, and a slot defined by each bend, the slot ~z~
extending in length in the bend sufficient to accommodate a similar slot of a second panel, whereby two of said panels may be articulatingly latched at the bends by nesting the respective slots on adjacently disposed bends.
In this way opposite ends 17 and 18 of the panels 15 interlock while allowing each adjacent panel to flex at the "joint" formed thereby. This allows one to trace out a circular or non-linear path for the barrier wall, if that be desired.
The panels, see figures 3 and 4, have a wedge piece 25, that defines a space 27 therebetween, welded as at weld seams 24. The space 27 provides for the passage therethrough of a stabilizing rod 30. A thumb screw 27 is threaded through one surface of the wedge 25 so as to provide means for securing the panel to the rod. Suitable rods 30 are about 30 cm in length, and are cut from rods commonly known in the construction trade as concrete reinforcing rods. The height H
of the panels may be any convenient height and for the ice rink barrier, approximately 10 cm. If the barrier is used for a swimming pool, the panel height H would vary in length from as small as, perhaps 2' (75 cm) to 8' or more (3 m) so as to accommodate the varying depth of the swimming poolO
Upon the area 11 bounded by the perimeter wall 12 is placed a water impervious sheeting 40, which conveniently may be a swimming pool quality vinyl liner 40, the ends of which are tucked closely adjacent to the inner surface of the perimeter wall, as seen in figure 3, and folded over the top of the perimeter wall as shown. A resilient biasing clamp 45 is form pushed onto the top of the wall so as to constrain the liner 40 and fixedly locate the same as required. The clamp 45 is made of extruded resilient material such as plastic or the like.
A metal shield 70, essentially L-shaped in cross-section, is placed over the upper margin of the perimeter wall 12 and extends downward toward the ground 50, but leaves a space therebetween as shown in figure 3.
, Thus, water may be flooded into the barrier area ll and when the cold weather arrives, ice 90 is formed. The level of water in the area 11 is of a depth, 5" (10 cm), sufficient to cause the lower distal end of the shield 70, which is on the inner surface of the wall 15 to be "dunked", or submerged therein. When the water freezes, the shield 70 is rigidly held in place. Thus a skate, or a puck 75, when hitting the shield 70, will not damage the side margins of the vinyl liner 40.
Those skilled in the art will appreciate that other variations to the invention may be easily accommodated without deviating from the invention as claimed.
In Canada and the upper states of the United States of America, winter is generally a long period of time and ice skating is a popular winter sport.
In the Great Lakes area of North America, particularly, there are significant freezing and thawing cycles from mid-November to early April, that in order to create and maintain an outdoor ice skating rink or pad, a "cold" winter, without significant thawing cycles is preferred. Such climatic conditions during winter appear occasionally as for example, the winter season of 1978-79. When a winter season has significant thawing cycles therethrough, during thawing, the ice pad or rink melts and the water runs off into the surrounding ground.
Also, if the ice pad is placed on grass, and winter flooding is commenced prior to either the ground having frozen solid and to a depth of several centimeters, the water will penetrate into the ground during attempted flooding, and is lost. Further, if there are no embankments about the perimeter of the ice pad to be formed, the water cannot be "layered" on to build up the ice, unless the temperatures are between 0F and 10F (approximately -15C). Without these temperatures, it is difficult to build up the base because the water runs off during attempted flooding. At these cold temperatures, which is preferred for flooding, the water almost instantly freezes on impact, or solidifies to such a degree that running off during flooding does not take place, and it is easy to build up the ice reasonably quickly.
There are other disadvantages to existing natural ice rinks as those who have tried to make ice rinks for their children in their own backyard will attest.
Other common complaints occur when there is very significant cold weather and a garden hose is used as the water conveying conduit for delivering water for flooding.
" '`` ~
Because of the low volume passing through the small diameter of the hose (approximately 3 centimeters internal diameter), the surround of the hose gets cold and the hose itself freezes up. Further, if wooden barriers, using 2 x 4's or the like, are used, the wood after several seasons warps, splits, or cracks, and the members have to be replaced.
All of the aforesaid objections to existing outdoor skating rinks and the problem of flooding and maintaining the same is avoided by this invention since it achieves a means by which water may be pooled in the late fall and contained there through the winter during which time it freezes naturally into a sheet of ice thereby allowing ice skating or ice hockey or curling. When a thawing cycle transpires momentarily through the winter season, the rink may be converted back into water but -the water does not run away and is thus available for refreezing when it gets cold again and the thawing cycle passes. In the early spring it is simple to remove the barrier and to allow the water to run away naturally.
In that aspect the invention achieves a metal barrier, preferably galvanized, composed of identical members with notches to form a unique interlock that also provides a flexing joint to a degree, yet provides adequate inherent inner stability. If the barrier elements, or panels, are dimensioned into different sizes, a plurality of panels may be used for the marginal walls a swimming pool.
The invention therefore contemplates a panel comprising a single sheet of rigid material having opposite marginal ends bent in the same direction, and a slot defined by each bend, the slot extending in length in the bend sufficient to accommodate a similar slot of a second panel, whereby two of said panels may be articulatingly latched at the bends by nesting the respective slots on adjacently disposed bends.
In my preferred embodiment, the invention contemplates a skating rink comprising a plurality of panels adjacently disposed marginal end to marginal end to thereby trace out (a) a closed perimeter with internal area;
(b) a water impervious sheet extending over said area - ~z~
against the inner marginal surface of the panels, and lapping over the upper margin of the perimeter;
(c) means for restraining the water impervious sheet on the perimeter thereby to hold the sheet relatively fixed to the perimeter and area;
(d) a rigid sheet of material suspended from the upper perimeter lip and extending down over the inner perimeter of the surface a predetermined distance, the second panel member having a lower distal end which extends toward the area a predetermined distance, so that when water is placed on the water impervious sheet, a pool of water is created therein and the distal end of the second panel is submerged therein.
The invention will now be described by way of example with reference to the accompanying drawings in which, Figure 1 is a perspective of a typical barrier layout, illustrative of the sequence of assembly, according to my invention.
Figure 2 is an assembly view of interlocking panels used to form a perimeter wall.
Figure 3 is a section along lines III-III of figure 1 being a cross-section through the perimeter wall when assembled~
Figure 4 is a plan view of the anchorage mechanism for the perimeter walll Referring to figure 1, a skating rink 10 defines an inner area 11 and is bounded thereabout by my novel perimeter wall 12.
The perimeter wall is composed of rigid interlocking upstanding panels 15 preferably made of galvanized sheet steel. The panels have opposite ends 17 and 18 flanged through a bend, in the same direction, where a recess or slot is defined in each end, one slot 19 is formed at the bend at end 17, and a mirror slot 20 at the bend of end 18, as clearly seen in figure 2. Thus the panel member comprises a single sheet of rigid material having opposite marginal ends bent in the same direc~ion, and a slot defined by each bend, the slot ~z~
extending in length in the bend sufficient to accommodate a similar slot of a second panel, whereby two of said panels may be articulatingly latched at the bends by nesting the respective slots on adjacently disposed bends.
In this way opposite ends 17 and 18 of the panels 15 interlock while allowing each adjacent panel to flex at the "joint" formed thereby. This allows one to trace out a circular or non-linear path for the barrier wall, if that be desired.
The panels, see figures 3 and 4, have a wedge piece 25, that defines a space 27 therebetween, welded as at weld seams 24. The space 27 provides for the passage therethrough of a stabilizing rod 30. A thumb screw 27 is threaded through one surface of the wedge 25 so as to provide means for securing the panel to the rod. Suitable rods 30 are about 30 cm in length, and are cut from rods commonly known in the construction trade as concrete reinforcing rods. The height H
of the panels may be any convenient height and for the ice rink barrier, approximately 10 cm. If the barrier is used for a swimming pool, the panel height H would vary in length from as small as, perhaps 2' (75 cm) to 8' or more (3 m) so as to accommodate the varying depth of the swimming poolO
Upon the area 11 bounded by the perimeter wall 12 is placed a water impervious sheeting 40, which conveniently may be a swimming pool quality vinyl liner 40, the ends of which are tucked closely adjacent to the inner surface of the perimeter wall, as seen in figure 3, and folded over the top of the perimeter wall as shown. A resilient biasing clamp 45 is form pushed onto the top of the wall so as to constrain the liner 40 and fixedly locate the same as required. The clamp 45 is made of extruded resilient material such as plastic or the like.
A metal shield 70, essentially L-shaped in cross-section, is placed over the upper margin of the perimeter wall 12 and extends downward toward the ground 50, but leaves a space therebetween as shown in figure 3.
, Thus, water may be flooded into the barrier area ll and when the cold weather arrives, ice 90 is formed. The level of water in the area 11 is of a depth, 5" (10 cm), sufficient to cause the lower distal end of the shield 70, which is on the inner surface of the wall 15 to be "dunked", or submerged therein. When the water freezes, the shield 70 is rigidly held in place. Thus a skate, or a puck 75, when hitting the shield 70, will not damage the side margins of the vinyl liner 40.
Those skilled in the art will appreciate that other variations to the invention may be easily accommodated without deviating from the invention as claimed.
Claims (13)
1. A panel comprising a single sheet of rigid material having opposite marginal ends bent in the same direction, and a slot defined by each bend, the slot extending in length in the bend sufficient to accommodate a similar slot of a second panel, whereby two of said panels may be articulatingly latched at the bends by nesting the respective slots of adjacently disposed bends.
2. A panel comprising a single sheet of rigid material having opposite marginal ends bent in the same direction and in relatively parallel planes, a slot defined by each bend, the slot extending in length in the bend sufficient to accommodate a similar slot of a second panel, whereby two of said panels may be articulatingly latched at the bends by nesting the respective slots of adjacently disposed bends.
3. The panel as claimed in claim 1, composed of galvanized sheet steel.
4. The panel as claimed in claim 2 or 3, wherein the slots, in length, are approximately one-half the length of the bend.
5. The panel as claimed in claim 2 or 3, wherein the length of the bend is shorter than the extent of the panel.
6. The panel as claimed in claim 1 or 2, wherein the slots, in length, are approximately one-half the length of the bend; including means for securing the panel in an upright position.
7. The panel as claimed in claim 2 or 3, wherein the length of the bend is shorter than the extent of the panel and, wherein the slots, in length, are approximately one-half the length of the bend; including means for securing the panel in an upright position.
8. The panel as claimed in claim 2 or 3, wherein the slots, in length, are approximately one-half the length of the bend, including a securing means that is affixed to that surface of the panel through which the bend extends.
9. A skating rink comprising a plurality of panels, as claimed in claim 1, 2 or 3, adjacently disposed marginal end to marginal end to thereby trace out a closed perimeter, with upper perimeter margin, all defining an internal area;
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
10. A skating rink comprising a plurality of panels, as claimed in claim 1, 2 or 3, wherein the slots, in length, are approximately one-half the length of the bend, adjacently disposed marginal end to marginal end to thereby trace out a closed perimeter, with upper perimeter margin, all defining an internal area;
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
11. A skating rink comprising a plurality of panels, as claimed in claim 1, 2 or 3, wherein the length of the bend is shorter than the extent of the panel, adjacently disposed marginal end to marginal end to thereby trace out a closed perimeter, with upper perimeter margin, all defining an internal area;
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
12. A skating rink comprising a plurality of panels, as claimed in claim 1, 2 or 3, wherein the slots, in length, are approximately one-half the length of the bend; including means for securing the panel in an upright position, adjacently disposed marginal end to marginal end to thereby trace out a closed perimeter, with upper perimeter margin, all defining an internal area;
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
13. A skating rink comprising a plurality of panels, as claimed in claim 1, 2 or 3, wherein the length of the bend is shorter than the extent of the panel and, wherein the slots, in length, are approximately one-half the length of the bend;
including means for securing the panel in an upright position, adjacently disposed marginal end to marginal end to thereby trace out a closed perimeter, with upper perimeter margin, all defining an internal area;
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
including means for securing the panel in an upright position, adjacently disposed marginal end to marginal end to thereby trace out a closed perimeter, with upper perimeter margin, all defining an internal area;
(a) a water impervious sheet extending over said area and positioned against the inner surface of the panels, and lapping over the upper perimeter margin;
(b) means for restraining the water impervious sheet on the upper perimeter margin thereby to hold the sheet relatively fixed to the perimeter and area;
(c) a rigid sheet member suspended from the upper perimeter margin and extending down over the inner surface of the panels a predetermined distance, so that when water is placed on the water impervious sheet in said area, a pool of water is created therein and the distal end of the member is submerged therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000432366A CA1210416A (en) | 1983-07-13 | 1983-07-13 | Pool barrier for skating rinks and panel therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000432366A CA1210416A (en) | 1983-07-13 | 1983-07-13 | Pool barrier for skating rinks and panel therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1210416A true CA1210416A (en) | 1986-08-26 |
Family
ID=4125661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000432366A Expired CA1210416A (en) | 1983-07-13 | 1983-07-13 | Pool barrier for skating rinks and panel therefor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1210416A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5669227A (en) * | 1996-01-16 | 1997-09-23 | Original Shinny Rink Incorporated | Portable skating rink |
-
1983
- 1983-07-13 CA CA000432366A patent/CA1210416A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5669227A (en) * | 1996-01-16 | 1997-09-23 | Original Shinny Rink Incorporated | Portable skating rink |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |