Portable tray cart

Claim 2

A tray support including in combination, first and second trays, a support frame, first tray support means integral with said frame and having first interlocking means, second tray support means integral with said frame and having second interlocking means, said first tray support means being spaced from said second tray support means, first interlock cooperating means located at a first predetermined position on each said tray, and second interlock cooperating means located at a second predetermined position on each said tray, said first predetermined position being located on each said tray at a position different from said second predetermined position, said first tray being positioned on one of said first and second tray support means with one of said first and second interlock coopeRating means coacting with one of said first and second interlocking means to fix said tray to the selected one of said first and second tray support means, and said second tray being positioned on the other one of said first and second tray support means with the other one of said first and second interlock cooperating means coacting with the other one of said first and second interlocking means to fix said second tray to the other one of said first and second tray support means.

Claim 3

The tray support of claim 1 wherein said first tray support means includes first and second rails oppositely disposed from one another and connected to said frame, and said first interlocking means includes upright members positioned on opposite ends of each rail, said upright members substantially forming a square, and said first interlock cooperating means on each said tray includes the tray bottom having a substantially square recessed portion, said square recessed portion being dimensioned slightly greater than said square defined by said upright members and being recessed to a depth greater than the height of said upright members, whereby one of said first and second trays is selectively positioned on said first tray support means with said recessed bottom portion being fitted over and interlocking with said upright members to fix said selected tray in position thereon.

Claim 4

The tray support of Claim 2 wherein said second tray support means includes first and second rails oppositely disposed from one another and connected to said frame, and said second interlocking means includes projection receiving means intermediate the ends of each said rail, each said tray being defined by four walls and a bottom section and including a flange portion about the top of the walls defining the tray opening, and said second interlock cooperating means includes projection means extending from the flange portion, whereby the other one of said first and second trays is selectively positioned on said second tray support means with said projection means on said flange portion fitting into said projection receiving means in said rails with the same interlocking to fix said other selected tray in position thereon.

Claim 5

The tray support of claim 3 wherein said second interlock means includes a projection extending from said flange at each of the four sides of each said tray defining oppositely disposed pairs of projections with the spacing between said oppositely disposed pairs being equal, whereby said selected tray is set onto the tray support on said first and second rails with any two oppositely disposed projections fitting into said projection receiving means.

Claim 6

The tray support of claim 3 wherein said tray is removed from said second tray support means by lifting said projection means from said projection receiving means and sliding said flange portion along said first and second rails.

Claim 7

The tray support of claim 1 wherein said first tray support means includes first and second rails oppositely disposed from one another and connected to saId frame, and said first interlocking means thereof includes upright members positioned on opposite ends of each rail, said upright members substantially forming a square, each said tray being defined by four walls and a bottom section and including a flange portion about the top of the walls defining the tray opening, said first interlock cooperating means on each said tray includes the tray bottom having a substantially square recessed portion, said square recessed portion being dimensioned slightly greater than said square defined by said upright members and being recessed to a depth greater than the height of said upright members, whereby one of said first and second trays is selectively positioned on said fiRst tray support means with said recessed bottom portion being fitted over and interlocking with said upright members to fix said selected tray In position, and said second tray support means includes third and fourth rails oppositely disposed from one another and connected to said frame, said third and fourth rails being positioned below said first and second rails in a spaced relation thereto for fitting the other tray below said first selected one on said tray support, said second interlocking means of said second tray suppoRt means includes projection receiving means intermediate the ends of each said third and forth rails, and said second interlock cooperating means includes a projection extending from said flange at each of the four sides of each said tray and oppositely disposed from one another, whereby the tray other than said selected tray is set onto the tray support on said third and fourth rails with any two oppositely disposed projections fitting into said projection receivIng means. 7. The tray support of claim 6 wherein the tray support is a moveable cart.

Claim 8

A tray in combination with a tray cart which has first and second tray support levels, said first level including a plurality of upright members, said second level including first and second oppositely disposed rail members supported by the cart each of the rail members including projection receiving means, the tray including in combination, four sides joined to a bottom section defining a tray having an open end and a predetermined depth, a flange portion about the perimeter of the open end, said flange portion including projection means coMprising a projection extending from said flange at each of the four sides defining oppositely disposed pairs of projections with the spacing between said oppositely disposed pairs being equal, said bottom section including a recessed portion, said tray being selectively mounted to said first support level with the upright members thereof extending into said recessed portion of said bottom section to fix the tray in position, and the same being mounted to said second support level with said flange portion being supported by said second tray support level and with any two oppositely disposed projections fitting into said projection receiving means to fix the tray in position.

Claim 9

A tray in combination with a tray cart which has first and second tray support levels, said first level including a plurality of upright members, said second level including first and second oppositely disposed rail members supported by the cart each of the rail members including projection receiving means, the tray including in combination, four sides joined to a bottom section defining a tray having an open end and a predetermined depth, a flange portion about the perimeter of the open end, said flange portion including projection means coMprising a projection extending from said flange at each of the four sides defining oppositely disposed pairs of projections with the spacing between said oppositely disposed pairs being equal, said bottom section including a recessed portion, said tray being selectively mounted to said first support level with the upright members thereof extending into said recessed portion of said bottom section to fix the tray in position, and the same being mounted to said second support level with said flange portion being supported by said second tray support level and with any two oppositely disposed projections fitting into said projection receiving means to fix the tray in position.

Claim 10

The tray of claim 8 wherein the tray cart includes the first tray support level comprising first and second oppositely disposed rail members supported by the cart, each rail member having first and second upright members positioned at opposite ends thereof defining substantially a square, the tray further including said recessed bottom portion having a depth greater than the height of each of the upright members, said recessed portion having substantially a square shape and being dimensioned slightly larger than the square defined by the upright members, said tray being set into the cart on the rails of the first tray support level with the upright members extending into the recessed portion of the bottom section to hold the tray in position.