US 5,702,375 AGranted

Absorbent pad and thermal pack

AssigneeStephen P. Angelillo

InventorsStephen P. Angelillo, Richard E. Sweeting

Life of this patent

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Abstract

An apparatus and method is disclosed for an improved absorbent pad and thermal pack for absorbing a liquid discharged from a patient. The absorbent pad and thermal pad comprises an outer sheet made of a liquid impermeable material and an inner sheet of a liquid permeable material. An absorbent sheet is disposed between the inner sheet and the outer sheet. A flexible liquid impermeable container having a chemical mixture which undergoes a thermal reaction upon activation thereof is interposed between the outer and inner sheets to enable the thermal source to be applied to the patient and to enable any liquid from the patient to permeate through the inner sheet to be absorbed by the absorbent sheet. The inner sheet of a liquid permeable material provides a moderate insulation barrier whereas the absorbent pad provides a substantial insulation barrier for directing the thermal source to the patient.

Claims15

Dependent claims

An improved absorbent pad and thermal pack for absorbing a liquid discharged from a patient, comprising in combination:

an outer sheet portion and an inner sheet portion;
said outer sheet portion having an outer surface and an inner surface;
said inner sheet portion having an outer surface and an inner surface with said inner sheet portion being made of a liquid permeable material;
said inner sheet portion providing a moderate thermal barrier;
an absorbent sheet having an inner surface and an outer surface;
said absorbent sheet being greater in thickness than said inner sheet portion for providing a substantial thermal barrier which is substantially greater than the moderate thermal barrier of said inner sheet portion;
a thermal pack comprising a flexible liquid impermeable container containing a chemical mixture which undergoes a thermal reaction upon activation of the chemical mixture;
said outer sheet portion being connected to said inner sheet portion for enclosing said thermal pack and said absorbent sheet with said thermal pack being interposed between said absorbent sheet and said inner sheet portion and being in direct contact with said inner surface of said inner sheet portion enabling said thermal pack to cool said patient and with said liquid permeable material of said inner sheet portion enabling any liquid from the patient to permeate through said inner sheet portion to be absorbed by said absorbent sheet;
said absorbent sheet establishing a substantial thermal insulator between said thermal pack and a temperature of ambient air and with said inner sheet portion establishing a moderate thermal insulator between said thermal pack and the patient for providing a preferential flow of heat between the patient and said thermal pack relative to the flow of heat between the ambient air and the thermal pack;
and
said inner sheet portion being substantially thinner than said absorbent sheet for allowing the liquid discharged from the patient to migrate through said inner sheet portion to said absorbent sheet wherein the majority of the liquid discharged from the patient is absorbed by said absorbent sheet.

8 more elements

An improved absorbent pad and thermal pack for absorbing a liquid discharged from a patient, comprising in combination:

an outer sheet portion and an inner sheet portion;
said outer sheet portion having an outer surface and an inner surface;
said inner sheet portion having an outer surface and an inner surface with said inner sheet portion being made of a liquid permeable material;
said inner sheet portion providing a moderate thermal barrier;
an absorbent sheet having an inner surface and an outer surface;
said absorbent sheet being greater in thickness than said inner sheet portion for providing a substantial thermal barrier which is substantially greater than the moderate thermal barrier of said inner sheet portion;
a thermal pack comprising a flexible liquid impermeable container containing a chemical mixture which undergoes a thermal reaction upon activation of the chemical mixture;
said outer sheet portion being connected to said inner sheet portion for enclosing said thermal pack and said absorbent sheet with said thermal pack being interposed between said absorbent sheet and said inner sheet portion and being immediately adjacent with said inner surface of said inner sheet portion enabling said thermal pack to cool said patient and with said liquid permeable material of said inner sheet portion enabling any liquid from the patient to permeate through said inner sheet portion to be absorbed by said absorbent sheet;
said absorbent sheet establishing a substantial thermal insulator between said thermal pack and a temperature of ambient air and with said inner sheet portion establishing a moderate thermal insulator between said thermal pack and the patient for providing a preferential flow of heat between the patient and said thermal pack relative to the flow of heat between the ambient air and the thermal pack;
and
said inner sheet portion being substantially thinner than said absorbent sheet for allowing the liquid discharged from the patient to migrate through said inner sheet portion to said absorbent sheet wherein the majority of the liquid discharged from the patient is absorbed by said absorbent sheet.

8 more elements

An improved absorbent pad and thermal pack for absorbing a liquid discharged from a patient, comprising in combination:

an outer sheet portion and an inner sheet portion;
said outer sheet portion having an outer surface and an inner surface;
said inner sheet portion having an outer surface and an inner surface with said inner sheet portion being made of a liquid permeable material;
said inner sheet portion providing a moderate thermal barrier;
an absorbent sheet having an inner surface and an outer surface;
said absorbent sheet being greater in thickness than said inner sheet portion for providing a substantial thermal barrier which is substantially greater than the moderate thermal barrier of said inner sheet portion;
a thermal pack comprising a flexible liquid impermeable container containing a chemical mixture which undergoes a thermal reaction upon activation of the chemical mixture;
said outer sheet portion being connected to said inner sheet portion for enclosing said thermal pack and said absorbent sheet with said thermal pack being interposed between said absorbent sheet and said inner sheet portion;
said inner sheet portion enabling said thermal pack to cool said patient and with said liquid permeable material of said inner sheet portion enabling any liquid from the patient to permeate through said inner sheet portion to be absorbed by said absorbent sheet;
said absorbent sheet establishing a substantial thermal insulator between said thermal pack and a temperature of ambient air and with said inner sheet portion establishing a moderate thermal insulator between said thermal pack and the patient for providing a preferential flow of heat between the patient and said thermal pack relative to the flow of heat between the ambient air and the thermal pack;
and
said inner sheet portion being substantially thinner than said absorbent sheet and being the sole sheet interposed between said thermal pack and the patient for allowing the liquid discharged from the patient to migrate through said inner sheet portion to said absorbent sheet wherein the majority of the liquid discharged from the patient is absorbed by said absorbent sheet.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/493,527Filed 22 Jun 1995 · continuation
Priority: 5 Mar 1990
Granted: 30 Dec 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61F 7/03
Compresses or poultices for effecting heating or cooling: thermophore, i.e. self-heating, e.g. using a chemical reaction
A61F 13/15
Bandages or dressings ; Absorbent pads: absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body;…
A61F 13/84
Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor;…:…
A61F 7/106
Cooling bags, e.g. ice-bags: self-cooling, e.g. using a chemical reaction

Family

Serial487,856Parent of this continuation · filed 5 Mar 1990
Serial822,887Parent of this continuation · filed 21 Jan 1992
Serial78,867Parent of this continuation · filed 18 Jun 1993
Serial254,490Parent of this continuation · filed 6 Jun 1994
US 5,277,180 AParent of this continuation
US 5,178,139 AParent of this continuation
US 5,702,375 AThis patent

From the US filing history. Foreign family members aren’t listed.