# US 5,704,347 A · Breathing valve

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

- Number: US 5,704,347 A
- Document ID: US5704347A
- Status: Granted
- Kind: A
- Application number: 08/679,275
- Filed: 1996-07-12
- Granted: 1998-01-06
- Earliest claimed: 1995-08-31
- Assignees: Dragerwerik Aktiengesellschaft
- Inventors: Joachim Schlobohm
- Web page: https://patentgrep.com/patent/US5704347A

## CPC

- A61M 16/208: {Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves}
- A62B 18/10: Valves
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00)

## Abstract

A breathing valve with a valve disk lying on a valve crater and with a valve spring, which is in contact with the valve disk with a first spring portion and with a support surface with a second spring portion. The valve spring is designed as a valve spring that can be spread open against the support surface, and the support surface is designed as a wedge-shaped spreading surface engaging the second spring portion in the area of contact with the second spring portion.

## Claims

### Claim 1

A breathing valve, comprising:
a valve disk;
a valve crater, said valve disk lying on said valve crater;
a support surface;
a valve spring in contact with said valve disk with a first spring end and in contact with said support surface with a second spring end, said valve spring being spread against said support surface, said support surface defining a spreading surface engaging said second spring end in the area of contact with said second spring end; and
friction means positioned in said second spring portion and in said support surface for creating a specific coefficient of friction that reduces vibration of said valve disk when a user of the breathing valve expirates through the breathing valve.

### Claim 2 (depends on 1)

A breathing valve in accordance with claim 1, wherein said valve spring is a leaf spring bent in the shape of a U, wherein said first spring end is provided on an axis of symmetry of a bent part of said leaf spring and said second spring end is formed by leaf spring leg ends which extend away from said first spring end.

### Claim 3 (depends on 2)

A breathing valve in accordance with claim 2, wherein;
said friction means includes a shape of said spreading surface, and said shape includes a cylindrical area, which projects in a stepped manner, and is directed toward the insides of the said leg ends.

### Claim 4 (depends on 2)

A breathing valve in accordance with claim 2, wherein;
said friction means includes a shape angle .alpha. of said spreading surface of about 120.degree. with said axis of symmetry.

### Claim 5 (depends on 2)

A breathing valve in accordance with claim 2, wherein a radius of curvature R of said leaf spring and a height H of said leaf spring are approximately equal.

### Claim 6 (depends on 2)

A breathing valve in accordance with claim 2, wherein said leaf spring has a leg length X corresponding to substantially 40% of a height H of said leaf spring.

### Claim 7 (depends on 2)

A breathing valve in accordance with claim 2, wherein a diameter D of said leaf spring is about twice a height H of the said leaf spring.

### Claim 8 (depends on 2)

A breathing valve in accordance with claim 2, wherein said leg ends have a sliding surface in an area of a sloping part of said spreading surface.

### Claim 9

A breathing valve, comprising:
a valve disk;
valve crater means for defining a gas inflow channel and having an annular valve seat, said valve disk lying on said valve seat;
a support surface connected to said valve crater means;
a valve spring in contact with said valve disk with a first spring portion and in contact with said support surface with a second spring portion, said valve spring being spread against said support surface, said support surface defining a spreading surface engaging said second spring portion in the area of contact with said second spring end; and
friction means positioned in said second spring portion and in said support surface for creating a specific coefficient of friction that reduces vibration of said valve disk when a user of the breathing valve expirates through the breathing valve.

### Claim 10 (depends on 9)

A breathing valve in accordance with claim 9, wherein;
said friction means includes a slope angle .alpha. of said spreading of about 120.degree. with said axis of symmetry.

### Claim 11 (depends on 9)

A breathing valve in accordance with claim 9, wherein:
a shape of said support surface causes degressive spring characteristics in said valve spring.

### Claim 12 (depends on 9)

A breathing valve in accordance with claim 9, wherein:
said friction means includes a specific surface treatment of a contact surface between said second spring portion and said support surface.

### Claim 13 (depends on 9)

A breathing valve in accordance with claim 9, wherein:
said friction means includes a shape of said support surface.

### Claim 14 (depends on 9)

A breathing valve in accordance with claim 9, wherein:
said friction means includes said shape of said support surface.

### Claim 15

A breathing valve, comprising:
a valve disk;
valve crater means for defining a gas inflow channel and having an annular valve seat, said valve disk lying on said valve seat;
a support surface connected to said valve crater means;
a valve spring having a first spring portion in contact with said valve disk, said valve spring having a second spring portion in contact with said support surface, said valve spring biasing said valve disk against said valve seat, said support surface having a shape for spreading said second spring portion when said valve disk moves away from said valve seat;
friction means at said second spring portion and at said support surface for creating a specific coefficient of friction that reduces vibration of said valve disk when an operator of the breathing valve expirates through the breathing valve.

### Claim 16 (depends on 15)

A breathing valve in accordance with claim 15, wherein:
said specific coefficient of friction markedly reduces vibration of said valve disk.

### Claim 17 (depends on 15)

A breathing valve in accordance with claim 15, wherein:
said shape of said support surface causes degressive spring characteristics in said valve spring for especially low respiration resistances at massive gas flows.

### Claim 18 (depends on 17)

A breathing valve in accordance with claim 17, wherein: said friction means includes said shape of said support surface.

### Claim 19 (depends on 15)

A breathing valve in accordance with claim 15, wherein:
said friction means includes a specific surface treatment of a contact surface between said second spring portion and said support surface.

### Claim 20 (depends on 15)

A breathing valve in accordance with claim 15, wherein:
said friction means includes said shape of said support surface.