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US 4,986,738 AGranted
Airflow control system pump and housing
AssigneeLeggett & Platt, Incorporated
InventorsNozomu Kawasaki, Terence A. Scott
Life of this patent
Estimating the term…
Abstract
A housing containing an air pump and an air pressure supply system for supplying air to a body support, such as an air mattress. The housing contains, in addition to the air pump, diaphragm type pressure regulators and diaphragm type surge check valves, as well as passageways and pressure chambers for interconnecting the pump to the pressure regulators and surge check valves.
Claims19
Apparatus for supplying air to multiple zones of a body support at differing pressures, said apparatus comprising
- an air pump having an inlet and an outlet,
- a housing, said air pump being mounted within said housing,
- an air filter mounted upon said housing,
- at least three pressure regulators mounted upon said housing, each of said pressure regulators having an inlet and an outlet,
- sealed pressure chambers contained internally of said housing and defined in part by walls of said housing,
- passageway means contained internally of said housing walls for supplying air from outside said housing, through said filter to said inlet of said pump and from said outlet of said pump to the sealed pressure chambers and from said sealed pressure chambers to the inlets of said pressure regulators,
- a plurality of normally open surge check valves mounted on said housing, and
- passageway means in said housing for supplying air from the outlet of each one of said pressure regulators to one of said surge check valves and from said surge check valves to said zones of said body support.
5 more elements
Apparatus for supplying air to multiply zones of a body support at differing pressures, said apparatus comprising
- an air pump having an inlet and an outlet,
- a pump housing having external and internal walls, said housing comprising a front section and a rear section, said rear section being divided into a lower rear section and an upper rear section,
- a mounting plate, said mounting plate being sealingly located between said upper and lower rear sections of said housing, said mounting plate and internal walls of said housing defining at least two pressure chambers,
- said pump being mounted on said mounting plate,
- an air filter mounted on said housing,
- at least three pressure regulators mounted on said front section of said housing walls;
- and
- passageway means contained internally of said housing for supplying air from outside said housing through said filter to said inlet of said pump and from said outlet of said pump to at least one of said pressure chambers and from said at least one pressure chamber to said pressure regulators.
5 more elements
Dependencies are inferred from the claim text.