Drain inlet cover
First Claim
1. A drain inlet cover suitable for installation over a drain in a road which is bordered by a sidewalk and separated from the sidewalk by a vertical curb, with access to the drain through an opening in the curb, the drain inlet cover comprisinga horizontal laminar section which has front, rear and side edges, anda vertical laminar section which has a lower edge secured to the rear edge of the horizontal section;
- the horizontal section comprising(a) an upper laminar member which has a plurality of relatively large apertures therethrough,(b) a lower laminar member which has a plurality of relatively large apertures therethrough, and(c) a horizontal laminar filter member which(i) is sandwiched between the upper and lower members, and(ii) has a plurality of relatively small filter apertures therethrough; and
the vertical section comprising(a) a front member which has a plurality of relatively large apertures therethrough,(b) a rear member which has a plurality of relatively large apertures therethrough, and(c) a vertical filter member which(i) lies between the front and rear members, and(ii) has a plurality of relatively small filter apertures therethrough.
1 Assignment
0 Petitions
Accused Products
Abstract
A drain inlet cover for a drain in a road which is bordered by a sidewalk and separated from the sidewalk by a curb, with access to the drain through an opening in the curb. The cover includes a horizontal section which lies on the road and a vertical section which covers the opening in the curb. Each section includes a filter member which lies between two apertured polymeric members.
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Citations
20 Claims
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1. A drain inlet cover suitable for installation over a drain in a road which is bordered by a sidewalk and separated from the sidewalk by a vertical curb, with access to the drain through an opening in the curb, the drain inlet cover comprisinga horizontal laminar section which has front, rear and side edges, anda vertical laminar section which has a lower edge secured to the rear edge of the horizontal section;
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the horizontal section comprising (a) an upper laminar member which has a plurality of relatively large apertures therethrough, (b) a lower laminar member which has a plurality of relatively large apertures therethrough, and (c) a horizontal laminar filter member which (i) is sandwiched between the upper and lower members, and (ii) has a plurality of relatively small filter apertures therethrough; and the vertical section comprising (a) a front member which has a plurality of relatively large apertures therethrough, (b) a rear member which has a plurality of relatively large apertures therethrough, and (c) a vertical filter member which (i) lies between the front and rear members, and (ii) has a plurality of relatively small filter apertures therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 17, 18)
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10. A drain inlet cover suitable for installation over a drain in a road which is bordered by a sidewalk and separated from the sidewalk by a vertical curb, with access to the drain through an opening in the curb, the drain inlet cover comprisinga horizontal laminar section which has front, rear and side edges, anda vertical laminar section which has a lower edge secured to the rear edge of the horizontal section;
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the horizontal section comprising (a) an upper laminar member which is composed of a polymeric composition and which has a plurality of apertures therethrough, the apertures having a minimum dimension in the range 0.15 to 0.5 inch, (b) a lower laminar member which is composed of a polymeric composition and which has a plurality of apertures therethrough, the apertures having a minimum dimension in the range 0.15 to 0.5 inch, and (c) a horizontal laminar filter member which (i) is sandwiched between the upper and lower members, and (ii) has a plurality of filter apertures therethrough, the filter apertures being substantially smaller than the apertures in the upper and lower laminar members; and the vertical section comprising (a) a front member which is composed of a polymeric composition and which has a plurality of apertures therethrough, the apertures having a minimum dimension in the range 0.15 to 0.5 inch, (b) a rear member which is composed of a polymeric composition and which has a plurality of apertures therethrough, the apertures having a minimum dimension in the range 0.15 to 0.5 inch, and (c) a vertical filter member which (i) lies between the front and rear members, (ii) has a plurality of relatively small filter apertures therethrough, the filter apertures being substantially smaller than the apertures in the front and rear members, and (iii) extends from the bottom of vertical section to a level which is 60 to 80% of the height of vertical section. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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19. A method of making a drain inlet cover, the method comprising
(A) providing a precursor comprising (a) a first laminar member which is composed of a polymeric material and has a plurality of relatively large apertures therethrough, (b) a second laminar member which is composed of a polymeric material and has a plurality of relatively large apertures therethrough, and (c) a laminar filter member which (i) is composed of the polymeric material, (ii) is sandwiched between the first and second members, and (iii) has a plurality of relatively small filter apertures therethrough; -
(B) configuring the precursor into a configuration to provide horizontal and vertical sections; and (C) stabilizing the precursor in the configuration.
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20. A precursor for a drain inlet cover, the precursor comprising
(a) a first laminar substantially rectangular member which is composed of a polymeric material and has a plurality of relatively large apertures therethrough, (b) a second laminar substantially rectangular member which is composed of a polymeric material and has a plurality of relatively large apertures therethrough, and which overlaps 80 to 100% of the first layer; - and
(c) a laminar substantially rectangular filter member which (i) is composed of a polymeric material, (ii) is sandwiched between, and does not extend beyond the first and second members, and which overlaps 80 to 100% of the area of the second member, and (iii) has a plurality of relatively small filter apertures therethrough; a part of the first member, or a part of the second member, or parts of both the first member and second member, extending beyond the filter member to provide a rectangular section which is free of the filter member.
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Specification