# US 6,179,574 B2 · Apparatus for pressurizing fluids and using them to perform work

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- Number: US 6,179,574 B2
- Document ID: US6179574B2
- Status: Granted
- Kind: B2
- Application number: 09/153,274
- Filed: 1998-09-14
- Granted: 2001-01-30
- Earliest claimed: 1997-01-22
- Assignees: Jetec Company
- Inventors: Gene G. Yie
- Web page: https://patentgrep.com/patent/US6179574B2

## CPC

- F04B 1/124: Pistons
- F04B 7/06: the pistons and cylinders being relatively reciprocated and rotated
- F04B 9/1176: {the movement of each piston in one direction being obtained by a single-acting piston liquid motor}
- 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)

## Abstract

A fluid transfer apparatus utilizing a slanted cain disk to oscillate and rotate a set of pistons arranged in a circle. Channels associated with the pistons and piston housing effect the transfer of fluid from a first location to a second location, as well as the pressurization or depressurization of the fluid, during movement of the pistons. The apparatus can be used as a high-pressure fluid pump, a fluid-powered motor, a fluid distribution valve, or another fluid transfer device.

## Claims

### Claim 1

A fluid transfer apparatus, comprising:
a torque transmitter;
a rotary device associated with the torque transmitter;
three or more pistons arranged substantially in a circle;
a piston housing permitting axial and rotational movement of the pistons;
an oscillator associated with the rotary device causing axial oscillation and rotation of the pistons during rotation of the rotary device; and
channels associated with the pistons and piston housing for effecting the transfer of fluid from a first location to a second location as the pistons oscillate.

### Claim 2 (depends on 1)

The fluid transfer apparatus of claim 1, wherein the torque transmitter comprises a rotatable shaft communicating with the rotary device.

### Claim 3 (depends on 1)

The fluid transfer apparatus of claim 1, wherein the rotary device comprises a rotatable cam disk.

### Claim 4 (depends on 1)

The fluid transfer apparatus of claim 1, wherein the rotary device comprises the oscillator.

### Claim 5 (depends on 4)

The fluid transfer apparatus of claim 4, wherein the oscillator comprises a slanted surface on the rotary device communicating with the pistons.

### Claim 6 (depends on 1)

The fluid transfer apparatus of claim 1, wherein the channels comprise inlet and outlet channels in each piston, and a central channel in each piston communicating with the inlet and outlet channels.

### Claim 7 (depends on 6)

The fluid transfer apparatus of claim 6, further comprising cavities in the piston housing, in communication with the central channels, for effecting compression or decompression of fluid during axial movement of the pistons.

### Claim 8 (depends on 6)

The fluid transfer apparatus of claim 6, wherein the channels further comprise fluid inlet channels on a first plane in the piston housing and outlet channels on a second plane in the piston housing, positioned so the inlet and outlet channels in the piston housing communicate with the inlet and outlet channels in the pistons during movement of the pistons.

### Claim 9 (depends on 6)

The fluid transfer apparatus of claim 6, wherein the inlet and outlet channels in each piston are slanted.

### Claim 10 (depends on 1)

The fluid transfer apparatus of claim 1, comprising five or more of the pistons arranged substantially in a circle.

### Claim 11

A pump for pressurizing and transferring fluid, comprising:
a rotatable cam having a first side, and a slanted second side;
a motor-driven shaft in communication with the first side of the cam;
a piston housing including three or more piston cavities arranged substantially in a circle;
three or more pistons capable of axial rotational movement, each having a first end in communication with the slanted second side of the rotatable cam, and a second end in a piston cavity; and
inlet and outlet channels in the piston housing and pistons for effecting the transfer and pressurization of fluid during movement of the pistons.

### Claim 12 (depends on 11)

The pump of claim 11, wherein the second side of the rotatable cam is slanted at an angle, and the first end of each piston is slanted at a complementary angle.

### Claim 13 (depends on 11)

The pump of claim 11, wherein inlet and outlet channels in the pistons are formed in outer surfaces of the pistons, and engage the inlet and outlet channels in the piston housing during movement of the pistons.

### Claim 14 (depends on 13)

The pump of claim 13, wherein the inlet and outlet channels in the pistons are slanted.

### Claim 15 (depends on 11)

The pump of claim 11, comprising five or more of the piston cavities arranged substantially in a circle, and five or more oil the pistons.

### Claim 16

A fluid-powered motor, comprising:
a rotatable cam having a first side, and a slanted second side;
a drive shaft in communication with the first side of the cam;
a piston housing including three or more piston cavities arranged substantially in a circle;
three or more pistons capable of axial and rotational movement, each having a first end in communication with the slanted second side of the rotatable cam, and a second end in a piston cavity; and
inlet and outlet channels in the piston housing ad pistons for effecting the transfer of pressurized fluid to sequentially oscillate the pistons, causing rotation of the cam and drive shaft.

### Claim 17 (depends on 16)

The motor of claim 16, wherein the second side of the rotatable cam is slanted at an angle, and the first end of each piston is slanted at a complementary angle.

### Claim 18 (depends on 16)

The motor of claim 16, wherein inlet and outlet channels in the pistons are formed in outer surfaces of the pistons, and engage the inlet and outlet channels in the piston housing during movement of the pistons.

### Claim 19 (depends on 18)

The motor of claim 18, wherein the inlet and outlet channels in the pistons are slanted.

### Claim 20 (depends on 16)

The motor of claim 16, comprising five or more of the piston cavities arranged substantially in a circle, and five or more of the pistons.

### Claim 21

A fluid distribution valve, comprising:
a rotatable cam having a first side, and a slanted second side;
a piston housing including three or more piston cavities arranged substantially in a circle;
three or more pistons capable of axial and rotational movement, each having a first end in communication with the slanted second side of the rotatable cam, and a second end in a piston cavity;
inlet channels in the piston housing;
inlet channels in the pistons communicating with the inlet channels in the piston housing during movement of the piston, and with the piston cavities;
distribution channels in the piston cavities communicating with the exterior of the piston housing;
outlet channels in the piston housing; and
outlet channels in the pistons communicating with the piston cavities, and with the outlet channels in the piston housing.

### Claim 22 (depends on 21)

The valve of claim 21, wherein the second side of the rotatable cam is slanted at an angle, and the first end of each piston is slanted at a complementary angle.

### Claim 23 (depends on 21)

The valve of claim 21, wherein the inlet and outlet channels in the pistons are formed in outer surfaces of the pistons.

### Claim 24 (depends on 23)

The valve of claim 23, wherein the inlet and outlet channels in the pistons are slanted.

### Claim 25 (depends on 21)

The valve of claim 21, comprising five or more of the piston cavities arranged substantially in a circle, and five or more of the pistons.