Compressed air driven motor

Patent metadata

Field	Value
Publication number	US-12084974-B2
Application number	US-202217700895-A
Country	US
Kind code	B2
Filing date	Mar 22, 2022
Priority date	Jan 15, 2018
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

An air motor assembly includes an exhaust block with an exhaust port that conveys exhaust air into an exhaust manifold. The exhaust port includes an expansion chamber that creates a pressure drop in the exhaust gas, thereby decreasing the temperature of the exhaust gas. The expansion chamber is defined between a first wall that is tangential to the air motor cylinder and a second wall that is transverse to an axis of the exhaust port. Poppet valves control actuation of a shuttle. The poppet valves are disposed on the exterior of the air motor assembly and are thermally insulated from the air motor assembly.

First claim

The invention claimed is:

1. An airflow control assembly for an air motor having an air motor cylinder, an exhaust manifold extending at least partially around the air motor cylinder, the exhaust manifold having an exhaust inlet, an exhaust outlet, and an exhaust passage extending between the exhaust inlet and the exhaust outlet, and a control valve configured to provide motive fluid to the air motor cylinder and to receive exhaust fluid from the air motor cylinder, the airflow control assembly comprising:
a first poppet valve configured to mount on the air motor cylinder; the first poppet valve comprising:
a first valve housing including a first base flange, a first valve receiving cylinder extending from a first side of the first base flange, a first line port extending through a side of the first valve receiving cylinder, the first line port configured to receive a first compressed air line to provide compressed air to the first poppet valve, and a vent formed through the first valve housing to vent compressed air from within the first poppet valve; and
a first valve assembly disposed at least partially within the first valve receiving cylinder and removably mounted to the first valve housing at a location within the first valve receiving cylinder, the first valve assembly comprising:
a first valve body removably connected to the first valve receiving cylinder, wherein at least one inlet port and at least one outlet port are formed through the first valve body;
a first valve member disposed within the first valve body, the first valve member movable between a closed position fluidly disconnecting the at least one inlet port from the at least one outlet port and an open position fluidly connecting the at least one inlet port and the at least one outlet port; and
a first rod extending from the first valve member and out of the first valve housing.

2. The airflow control assembly of claim 1 , wherein the first compressed air line is an external poppet line extending from the first line port and configured to interface with the control valve to provide a first flowpath for compressed air between the first poppet vale and the control valve external to the air motor cylinder.

3. The airflow control assembly of claim 1 , wherein the vent is at least one vent extends through the receiving cylinder to provide a flowpath to vent air from within the receiving cylinder.

4. The airflow control assembly of claim 3 , wherein the at least one vent extends into the receiving cylinder at a location between the first base flange and the line port projection.

5. The airflow control assembly of claim 1 , wherein the vent includes a plurality of vents.

6. The airflow control assembly of claim 1 , wherein a first spring is disposed between the first rod and the first valve member to bias the first valve member away from the first rod.

7. The airflow control assembly of claim 6 , wherein a second spring is disposed within the first valve body on an opposite side of the first valve member from the first rod, the second spring configured to bias the first valve member towards the first rod.

8. The airflow control assembly of claim 1 , wherein the first valve body mounts to the first valve receiving cylinder by interfaced threading.

9. The airflow control assembly of claim 1 , further comprising:
a second poppet valve configured to mount on the air motor cylinder, the second poppet valve comprising:
a second valve housing including a second base flange, a second valve receiving cylinder extending from a first side of the second base flange, and a second line port extending through a side of the second valve receiving cylinder, the second line port configured to receive a second compressed air line to provide compressed air to the second poppet valve; and
a second valve assembly disposed at least partially within the second valve receiving cylinder, the second valve assembly removably mounted to the second valve housing and comprising:
a second valve body projecting out of the second valve receiving cylinder;
a second valve member disposed within the second valve body; and
a second rod extending from the second valve member and out of the second valve housing.

10. The airflow control assembly of claim 9 , wherein the second compressed air line is an external poppet line extending from the second line port and configured to interface with the control valve to provide a flowpath for the compressed air between the second poppet valve and the control valve that is external to the air motor cylinder.

11. A compressed air powered motor comprising:
the airflow control assembly of claim 9 ;
the air motor cylinder;
the exhaust manifold extending at least partially around the air motor cylinder;
the control valve configured to provide motive fluid to the air motor cylinder and to receive exhaust fluid from the air motor cylinder; and
a connecting rod extending out of a lower side of the air motor cylinder and configured to be reciprocated along an axis;
wherein the first poppet valve is mounted to an upper side of the air motor cylinder opposite the lower side; and
wherein the second poppet valve is mounted to the lower side of the air motor cylinder.

12. The compressed air powered motor of claim 11 , wherein the first poppet valve and the second poppet valve are radially offset from the axis.

13. An airflow control assembly for an air motor having an air motor cylinder, an exhaust manifold extending at least partially around the air motor cylinder, the exhaust manifold having an exhaust inlet, an exhaust outlet, and an exhaust passage extending between the exhaust inlet and the exhaust outlet, and a control valve configured to provide motive fluid to the air motor cylinder and to receive exhaust fluid from the air motor cylinder, the airflow control assembly comprising:
a first poppet valve configured to mount on the air motor cylinder; the first poppet valve comprising:
a first valve housing including a first base flange, a first valve receiving cylinder extending from a first side of the first base flange, and a first line port extending through a side of the first valve receiving cylinder, the first line port configured to receive a first compressed air line to provide compressed air to the first poppet valve; and
a first valve assembly disposed at least partially within the first valve receiving cylinder and removably mounted to the first valve housing at a location within the first valve receiving cylinder, the first valve assembly comprising:
a first valve body removably connected to the first valve receiving cylinder;
a first valve member disposed within the first valve body; and
a first rod extending from the first valve member and out of the first valve housing; and

a first gasket disposed on a second side of the first base flange opposite the first side of the first base flange.

14. The airflow control assembly of claim 13 , further comprising:
a first plurality of fastener openings extending through the first base flange and the first gasket.

15. The airflow control assembly of claim 13 , wherein a second gasket is disposed on the first side of the first base flange.

16. The airflow control assembly of claim 15 , wherein a first plurality of fastener openings extend through the first gasket, the first base flange, and the second gasket.

17. An airflow control assembly for an air motor having an air motor cylinder, an exhaust manifold extending at least partially around the air motor cylinder, the exhaust manifold having an exhaust inlet, an exhaust outlet, and an ex

Assignees

• Graco Minnesota Inc

Inventors

• Mccormick Martin P
• Dauwalter Benjamin J
• Floer Kenneth C

Classifications

• F01B31/005

  Silencing equipment (F01B31/16 takes precedence) · CPC title

• F01B31/02

  De-icing means for engines having icing phenomena · CPC title

• F04B9/125

  reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor · CPC title

• F01B25/02 Primary

  Regulating or controlling by varying working-fluid admission or exhaust, e.g. by varying pressure or quantity · CPC title

• F01B23/08

  Adaptations for driving, or combinations with, pumps · CPC title