# US 5,704,590 A · Drain valve for bladder-type bulk container

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,704,590 A
- Document ID: US5704590A
- Status: Granted
- Kind: A
- Application number: 08/780,377
- Filed: 1997-01-08
- Granted: 1998-01-06
- Earliest claimed: 1996-01-10
- Assignees: Sotralentz S.A.
- Inventors: Pierre Pfeiffer
- Web page: https://patentgrep.com/patent/US5704590A

## CPC

- F16K 5/0492: {Easy mounting or dismounting means}
- F16K 5/04: with plugs having cylindrical surfaces; Packings therefor
- F16K 27/065: {with cylindrical plugs}
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}

## Abstract

A valve has a molded plastic valve housing defining an inlet port, an outlet port, and a chamber between the ports. The housing also has a collar defining an opening into the chamber and carrying a molded plastic cap formed with a central hole. A molded plastic valve body is rotatable about a body axis between open and closed positions in the chamber and is unitarily formed with a throughgoing passage aligned with the ports only in the open position, a stem extending along the body axis through the hole of the cap, axially oppositely open mass-reducing pockets, and an annular rim captured between the cap and the collar.

## Claims

### Claim 1

A valve comprising:
a molded plastic valve housing defining an inlet port, an outlet port, and a chamber between the ports, the housing having a collar defining an opening into the chamber;
a molded plastic cap secured over the collar and formed with a central hole; and
a molded plastic valve body rotatable about a body axis between open and closed positions in the chamber and unitarily formed with
a throughgoing passage aligned with the ports only in the open position,
a stem extending along the body axis through the hole of the cap,
axially oppositely open mass-reducing pockets, and
an annular rim captured between the cap and the collar.

### Claim 2 (depends on 1)

The valve defined in claim 1 wherein one of the pockets annularly surrounds the stem.

### Claim 3 (depends on 2)

The valve defined in claim 2 wherein the housing is formed with a floor confronting the other pocket of the body.

### Claim 4 (depends on 3)

The valve defined in claim 3 wherein the body has a tubular extension coaxially surrounding the stem and formed with an outwardly projecting lip constituting the rim.

### Claim 5 (depends on 1)

The valve defined in claim 1 wherein the body and housing are also formed with cooperating formations defining the open and closed positions.

### Claim 6 (depends on 1)

The valve defined in claim 1 wherein the inlet and outlet ports are centered on a flow axis perpendicular to the body axis.