Abstract A sanitary holding sump which can be formed in a blind cavity such as a toilet sump below an interior deck of a boat. The sump is formed with a laminated construction including two plastic bags, one within the other, and an intermediate plastic foam filler which has been cured to a rigid state. The top of the sump is sealed to the bulkhead and includes a ducted two-part cover plate for receiving and discharging waste material. The sump is formed below an interior deck by installing a first plastic bag connected to a first flange through an aperture in the interior deck, then placing a charge of foaming plastic resin in a substantially liquid state in the first bag, and then installing a second plastic bag connected to a second flange which covers the first flange. The inner bag is then pressurized internally, displacing the foaming resin in the outer bag and distributing it substantially evenly throughout the entire cavity or space between the two bags. Some expansion of the outer bag is accomplished by means of the foaming action of the resin. The resin eventually sets in its foamed state to provide the structural rigidity of the sump.
A sanitary holding sump comprising: a container with an opening on one side having a laminated construction including an outer envelope, an inner envelope and rigid plastic foam filling the space between the inner and outer envelopes; said inner and outer envelopes being plastic bags that are flexible prior to Lamination with said foam; and a sump cover positioned in the opening of the container, said cover including inner and outer circular flange elements, said inner flange element being joined to the inner envelope and said outer flange element being joined to the outer envelope.
Claim 2
Dependent Claim
95 words
A sanitary holding sump comprising: a container with an opening on one side having a laminated construction including an outer envelope, an inner envelope and rigid plastic foam filling the space between the inner and outer envelopes; said inner and outer envelopes being plastic bags that are flexible prior to Lamination with said foam; and a sump cover positioned in the opening of the container, said cover including inner and outer circular flange elements, said inner flange element being joined to the inner envelope and said outer flange element being joined to the outer envelope.
Claim 3
Dependent Claim
22 words
A sanitary holding sump of claim 1 wherein: the first and second flange elements of the sump cover have overlapping mounting flanges.