# US 4,392,872 A · Air bleeder valve for waterbed mattresses

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- Number: US 4,392,872 A
- Document ID: US4392872A
- Status: Granted
- Kind: A
- Application number: 06/250,864
- Filed: 1981-04-03
- Granted: 1983-07-12
- Earliest claimed: 1981-04-03
- Assignees: Monterey Manufacturing Co.
- Inventors: Charles P. Hall; John B. Johenning
- Web page: https://patentgrep.com/patent/US4392872A

## CPC

- B01D 19/0063: {Regulation, control including valves and floats (for construction and details of valves F16K)}
- A47C 27/085: {of liquid type, e.g. filled with water or gel}
- Y10S 55/43: Knitted filter mediums
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- A47C: CHAIRS; SOFAS; BEDS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An air bleeder valve for a waterbed mattress comprises a hollow tubular body sized to fit snugly into the fill spout of a waterbed mattress, a flap valve at one end of the body, and a porous, non-water absorbing water barrier in the tubular body for preventing water from splashing out of the mattress when bleeding air from the mattress.

## Claims

### Claim 1

A method for bleeding air from the waterbed mattress having a fill spout comprising the steps of:
(a) selecting an air bleeder valve comprising:
(i) an elongated, hollow tubular body having first and second ends and corresponding first and second end portions wherein at least the first end portion is adapted to snugly fit into the fill spout of a waterbed mattress;
(ii) a porous water barrier in the tubular body for preventing water from splashing out of the mattress when bleeding air from the mattress, the water barrier being constituted of a non-water absorbing material, the barrier not acting as a wick for water and being sufficiently porous that when wet, air can pass through the barrier; and
(iii) a check valve at the second end of the tubular body for allowing air to pass out of the body through the second end and for preventing air from passing into the body through the second end;
(b) placing the bleeder valve into the fill spout so that at least the first end portion of the tubular body is snugly fit into the fill spout; and
(c) subsequently causing air in the mattress to pass to the fill spout and out the bleeder valve, wherein water is prevented from splashing out of the mattress by the water barrier and air is prevented from passing from the atmosphere into the mattress by the valve.

### Claim 2 (depends on 1)

The method of claim 1 in which the water barrier comprises knitted polypropylene fiber.

### Claim 3 (depends on 1)

The method of claim 1 in which the check valve is a flap valve.

### Claim 4 (depends on 1)

The method of claim 1 when the air bleeder valve includes an adapter for snugly fitting the first end of the tubular body into the fill spout.