# US 4,391,568 A · Gas compressor

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

- Number: US 4,391,568 A
- Document ID: US4391568A
- Status: Granted
- Kind: A
- Application number: 06/238,011
- Filed: 1981-02-25
- Granted: 1983-07-05
- Earliest claimed: 1978-06-06
- Inventors: William L. Tenney
- Web page: https://patentgrep.com/patent/US4391568A

## CPC

- F02B 63/06: for pumps
- F02B 75/16: Engines characterised by number of cylinders, e.g. single-cylinder engines (F02B75/26 takes precedence)
- F04B 41/02: having reservoirs
- F04B 41/04: Conversion of internal-combustion engine cylinder units to pumps
- F02F 2007/0063: {Head bolts; Arrangements of cylinder head bolts}
- F05C 2201/021: Aluminium
- Y10S 123/07: Convertible
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F02F: CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F05C: INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A gas compressor drivably connected to an engine operates to supply compressed gas to a tank. The compressor has a housing including a commercial air cooled internal combustion engine block and cooling air system having a single cylinder chamber accommodating a reciprocating piston. The piston moves gas through a head and valve assembly connected to an air-to-air after cooler operable to cool and carry cooled compressed gas to a tank. The head holds the valve assembly on the cylinder. The valve assembly has a first valving ring allowing one-way flow of gas into the cylinder chamber and a second valving ring allowing one-way gas flow out of the cylinder chamber. A heat exchange unit is cooled with air moved by the commercial engine air cooling system of the compressor. The driving engine is of the same make and general type as used for the components of the compressor.

## Claims

### Claim 1

A system for compressing and delivering partly cooled gas to a desired location, comprising: a tank for storing compressed gas, a platform secured to the tank, a conventional air cooled four-cycle single cylinder internal combustion engine mounted on the platform, a gas compressor mounted on the platform whereby the tank, platform, engine, and compressor form a unit-handled assembly, means drivably connecting said engine to said gas compressor whereby the engine drives the gas compressor, said compressor comprising engine components of an identical air cooled four-cycle single cylinder internal combustion engine including a crankcase assembly, a cylinder attached to the crankcase assembly, a piston, said cylinder having a bore accommodating said piston, crankshaft means connected to the piston, and blower means connected to the crankshaft means for moving aspirated air toward the cylinder, shroud means surrounding the blower means for directing air toward the cylinder, and compressor components including a valve assembly mounted on the upper end of said cylinder for controlling the flow of gas into and out of the bore in response to movement of the piston therein, head means located in superposed engagement with said valve assembly, said valve assembly spacing the head means from said cylinder to form an open space between the head means and said cylinder to minimize the transfer of heat from the head means to said cylinder, said head means having a gas inlet port and a compressed gas discharge port in cooperative relationship to said valve assembly for gas flow control, means to connect the head means to the cylinder and secure the valve assembly therebetween, an after cooler conduit connected to said head discharge port for carrying hot compressed gas from said head means to the tank, said conduit including an arcuate portion disposed in circumambient relation to said blower means in the inlet path of the aspirated air theretoward, and shield means connected to the shroud means centrally of said arcuate portion of the conduit in spaced relation to said shroud means and blower means for confining said aspirated inlet air flow substantially radially inwardly over and around said arcuate conduit portion toward said blower means.

### Claim 2 (depends on 1)

The system of claim 1 wherein: said arcuate portion of the after cooler conduit is provided with a series of generally radially cooling fins, said fins being spaced from said blower means, shroud means, and said shield means.

### Claim 3 (depends on 1)

The system of claim 1 including: a plurality of fins attached to the arcuate portion of the after cooler conduit, and spacer means connected to some of the fins to space the fins from the shroud means and shield means.

### Claim 4 (depends on 3)

The system of claim 3 including: means attaching the shield means to the spacer means and the spacer means to the shroud means.

### Claim 5 (depends on 3)

The system of claim 3 wherein: the shield means is a generally circular plate.

### Claim 6 (depends on 1)

The system of claim 1 wherein: the drive means includes a belt and pulleys connecting the internal combustion engine with said compressor crankshaft means, said belt being located in driving engagement with said pulleys.

### Claim 7 (depends on 1)

The system of claim 1 wherein: the head means has a plurality of spaced fins providing passages for accommodating air from the blower means to cool the head means, said air flowing through the open space between the head means and cylinder to cool the head means and cylinder.

### Claim 8

A system for compressing and delivering partly cooled gas to a desired location, comprising: a tank for storing compressed gas, a platform secured to the tank, a conventional air cooled four-cycle single cylinder internal combustion engine mounted on the platform, a gas compressor mounted on the platform whereby the tank, platform, engine, and compressor form a unit-handled assembly, means drivably connecting said engine to said gas compressor whereby the engine drives the gas compressor, said compressor comprising engine components of an identical air cooled four-cycle single cylinder internal combustion engine including a crankcase assembly, a cylinder attached to the crankcase assembly, a piston, said cylinder having a bore accommodating said piston, crankshaft means connected to the piston, blower means connected to the crankshaft means for moving aspirated air toward the cylinder, shroud means surrounding the blower means for directing air toward the cylinder, and compressor components including a valve assembly mounted on the upper end of said cylinder for controlling the flow of gas into and out of the bore in response to movement of the piston therein, head means located in superposed engagement with said valve assembly, said valve assembly spacing the head means from the cylinder to form an open space between the head means and the cylinder to minimize the transfer of heat from the head means to the cylinder, said head means having a gas inlet port and a compressed gas discharge port in cooperative relationship to said valve assembly for gas flow control, means to connect the head means to the cylinder and secure the valve assembly therebetween, and after cooler means connected to said head discharge port for carrying hot compressed gas from said head means to the tank, said after cooler means having conduit means located in the path of the aspirated air whereby said air cools the gas in said conduit means.

### Claim 9 (depends on 8)

The system of claim 8 wherein: drive means includes a belt and pulleys connecting the internal combustion engine with the compressor crankshaft means, said belt being located in driving engagement with said pulleys.

### Claim 10 (depends on 8)

The system of claim 8 including: a plurality of fins attached to the conduit portions of said after cooler means.

### Claim 11 (depends on 10)

The system of claim 10 including: spacer means connected to some of the fins to space the fins from the shroud means.

### Claim 12 (depends on 11)

The system of claim 11 including: shield means connected to the spacer means, said sheild means being spaced from the fins.

### Claim 13 (depends on 8)

The system of claim 8 wherein: the head means has a plurality of spaced fins providing passages for accommodating air from the blower means to cool the head means, said air flowing through the open space between the head means and cylinder to cool the head means and cylinder.