# US 7,740,192 B2 · Rotating bi-directional pneumatic gun

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

- Number: US 7,740,192 B2
- Document ID: US7740192B2
- Status: Granted
- Kind: B2
- Application number: 11/475,890
- Filed: 2006-06-28
- Published: 2008-01-17
- Granted: 2010-06-22
- Earliest claimed: 2006-06-28
- Inventors: Kuo-Liang Chen
- Web page: https://patentgrep.com/patent/US7740192B2

## CPC

- B05B 1/005: {Nozzles or other outlets specially adapted for discharging one or more gases}
- Y10T 137/86879: Reciprocating valve unit
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A rotating bi-directional pneumatic gun has a body and a guiding tube mounted rotatably in the body. The guiding tube has an outer surface, a front notch, a rear notch, a front groove and a rear groove. The front notch and the rear notch are defined longitudinally in the outer surface of the guiding tube and are kept from communicating with each other. The front groove and the rear groove communicate respectively with the front notch and the rear notch and each have multiple inclined bores extending respectively toward the front end and the rear end of the barrel. Rotating the guiding tube can change the direction of air flow of the pneumatic gun, and the rotating bi-directional pneumatic gun is convenient to operate and easy to assemble.

## Claims

### Claim 1

A rotating bi-directional pneumatic gun comprising:
a body having
a barrel having
a front end;
a rear end;
a passage having a diameter, and
an outer surface; and
a handle being attached on the outer surface of the barrel and having
a chamber;
a connecting passage being communicated with the passage of the barrel; and
a valve device being mounted between the chamber and the connecting passage and communicating the connecting passage with the chamber when the valve device is on; and
a guiding tube being mounted rotatably in the passage of the barrel and having
an outer surface;
a front notch being defined longitudinally in the outer surface of the guiding tube;
a rear notch being defined longitudinally in the outer surface of the guiding tube and kept from communicating with the front notch;
a front groove being defined around the outer surface of the guiding tube, communicating with the front notch and having
a sidewall; and
multiple inclined bores defined through the sidewall and extending toward the front end of the barrel; and
a rear groove being defined around the outer surface of the guiding tube, communicating with the rear notch and having
a sidewall; and
multiple inclined bores defined through the sidewall and extending toward the rear end of the barrel.

### Claim 2 (depends on 1)

The rotating bi-directional pneumatic gun as claimed in claim 1, wherein
the barrel further comprises a positioning hole;
the guiding tube further comprises a positioning slot being defined in the outer surface of the guiding tube and aligning with the positioning hole of the barrel; and
the body further comprises a positioning pin being inserted into the positioning hole and protruded into the positioning slot.

### Claim 3 (depends on 2)

The rotating bi-directional pneumatic gun as claimed in claim 2, wherein
the positioning hole has an inner thread; and
the positioning pin has an outer thread and screws with the inner thread of the positioning hole.

### Claim 4 (depends on 3)

The rotating bi-directional pneumatic gun as claimed in claim 3, wherein
the guiding tube further comprises an airtight sleeve mounted between the front groove and the rear groove and around the outer surface of the guiding tube; and
the airtight sleeve has two cutouts corresponding respectively to the front notch and the rear notch in the guiding tube.

### Claim 5 (depends on 4)

The rotating bi-directional pneumatic gun as claimed in claim 4, wherein the guiding tube further comprises
two seal grooves defined respectively near the front end and the rear end of the barrel and around the surface of the guiding tube; and
two seals being mounted respectively in the seal grooves.

### Claim 6 (depends on 5)

The rotating bi-directional pneumatic gun as claimed in claim 5, wherein
the barrel further comprises a connecting tube formed on the front end of the barrel and has an inner diameter and a blocking shoulder;
the inner diameter of the connecting tube is smaller than the diameter of the passage; and
the blocking shoulder is defined between the connecting tube and the passage.

### Claim 7 (depends on 6)

The rotating bi-directional pneumatic gun as claimed in claim 6, wherein the guiding tube further comprises an annular collar formed on the outer surface of the guiding tube outside the barrel.

### Claim 8 (depends on 1)

The rotating bi-directional pneumatic gun as claimed in claim 1, wherein
the guiding tube further comprises an airtight sleeve mounted between the front groove and the rear groove and around the outer surface of the guiding tube; and
the airtight sleeve has two cutouts corresponding respectively to the front notch and the rear notch in the guiding tube.

### Claim 9 (depends on 1)

The rotating bi-directional pneumatic gun as claimed in claim 1, wherein the guiding tube further comprises
two seal grooves defined respectively near the front end and the rear end of the barrel and around the surface of the guiding tube; and
two seals being mounted respectively in the seal grooves.