# US 7,743,791 B2 · Air control module unit for portable pneumatic tool

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- Number: US 7,743,791 B2
- Document ID: US7743791B2
- Status: Granted
- Kind: B2
- Application number: 11/739,724
- Filed: 2007-04-25
- Published: 2008-10-30
- Granted: 2010-06-29
- Earliest claimed: 2007-04-25
- Assignees: China Pneumatic Corporation
- Inventors: George Chu
- Web page: https://patentgrep.com/patent/US7743791B2

## CPC

- F16L 29/007: {Joints with cut-off devices controlled separately}
- F16L 41/03: comprising junction pieces for four or more pipe members
- Y10T 137/877: With flow control means for branched passages
- Y10T 137/87893: With fluid actuator
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention generally relates to an air control module unit for a portable pneumatic tool, more particularly, to an air control module unit that actuates a valve stem inside an air inlet block of the air inlet module by a correspondent air bleed valve in the air actuation module. The air control module unit for a portable pneumatic tool comprising: an air inlet module, which has at least one valve stem inside an air inlet block, the air inlet block having plug screws on both ends towards the valve stem and one plug screw on the intersectional direction of the valve stem with at least one air inlet port opening for hooking up the compressed air; an air actuation module having a bleed valve inside the valve block; a plurality of flexible air hoses with a plurality of dimensions and being prepared for connecting the air inlet module and air actuation module; and a plurality of hose connectors and rubber seats with a plurality of types for connecting the air inlet module and the air operation module.

## Claims

### Claim 1

An air control module unit for a portable pneumatic tool having an air actuation module comprising:
an air inlet module, which has at least one valve stem inside an air inlet block, the air inlet block having plug screws on both ends towards the valve stem and one plug screw in the intersectional direction of the valve stem with at least one air inlet port opening for hooking up the compressed air;
an air actuation module having an air bleed valve inside a valve block;
a plurality of flexible air hoses with a plurality of dimensions and being prepared for connecting the air inlet module and air actuation module; and
a plurality of hose connectors and elastomeric seats with a plurality of types for connecting the air inlet module and air operation module.

### Claim 2 (depends on 1)

The air control module unit according to claim 1, wherein said air inlet module comprises: an air inlet block with at least one valve stem with O-Ring seals inside the bore of the air inlet block and plug screws towards both ends of the valve stem for sealing; and at least one air inlet port at intersectional direction of the valve stem for connecting the compressed air.

### Claim 3 (depends on 1)

The air control module unit according to claim 1, wherein said air inlet module can be built with at least one valve stem to communicate with a correspondent air actuation module and air operation module for various functional requirements.

### Claim 4 (depends on 1)

The air control module unit according to claim 1, wherein said air inlet module can be built with at least one air inlet port around the intersectional direction of the valve stem in the air inlet block while only leaving one air inlet port for connecting compressed air and have the rest of air inlet ports sealed with plug screws.

### Claim 5 (depends on 1)

The air control module unit according to claim 1 wherein said air inlet module can be built with every inlet and outlet holes around the air inlet block at the intersectional direction of the valve stem.

### Claim 6 (depends on 1)

The air control module unit according to claim 1, wherein said the air actuation module comprises: a valve block, an air bleed valves and a set of hose connectors, the air bleed valve is actuated by a press element to let the micro stream of compressed air escape and makes the valve stem inside the air inlet block move backward to hit the plug screw to allow the compressed air get into an air actuation module directly, at least one air bleed valve to communicate with the correspondent valve stem to be actuated in the air inlet block.

### Claim 7 (depends on 1)

The air control module unit according to claim 1, wherein said the elastomeric seats are made of rubber.