# US 10,309,400 B2 · Volumetric compressor

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- Number: US 10,309,400 B2
- Document ID: US10309400B2
- Status: Granted
- Kind: B2
- Application number: 15/505,408
- Filed: 2015-09-04
- Published: 2017-09-07
- Granted: 2019-06-04
- Earliest claimed: 2014-09-04
- Assignees: SCOPREGA S.p.A.
- Applicants: SCOPREGA S.p.A.
- Inventors: Artemio Affaticati
- Web page: https://patentgrep.com/patent/US10309400B2

## CPC

- F04C 23/001: {of similar working principle}
- F04C 18/126: {with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type}
- F04C 28/02: specially adapted for several pumps connected in series or in parallel
- F04C 29/12: Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C 2240/30: Casings or housings
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS

## Abstract

A two-stage rotary compressor for gas, in particular air. The compressor comprises a bottom plate and a head enclosing between them two compression stages. The compressor is characterized in that an interconnection device is arranged between the two compression stages, said device being suited to establish a communication “in series” or “in parallel”, to be selected by the manufacturer, between said two compression stages.

## Claims

### Claim 1

A two-stage rotary compressor (10) for a gas;
the rotary compressor (10) comprising a bottom plate (20) and a head (30), which enclose, between them, two compression stages ((I), (II));
the rotary compressor being characterised in that between said two compression stages ((I), (II)) an interconnection device (100; 100*; 100**) is arranged, which is suited to establish a communication “in series” (100*) or “in parallel” (100**), to be selected by the manufacturer, between said two compression stages ((I), (II));
wherein said interconnection device (100; 100*; 100**) comprises a first dividing plate (70) and a second dividing plate (80), which are packed one on the other;
said first dividing plate (70) and said second dividing plate (80) are identical.

### Claim 2 (depends on 1)

A two-stage rotary compressor (10), according to claim 1, characterised in that the two compression stages ((I), (II)) are different.

### Claim 3

A two-stage rotary compressor (10) for a gas;
the rotary compressor (10) comprising a bottom plate (20) and a head (30), which enclose, between them, two compression stages ((I), (II));
the rotary compressor being characterised in that between said two compression stages ((I), (II)) an interconnection device (100; 100*; 100**) is arranged, which is suited to establish a communication “in series” (100*) or “in parallel” (100**), to be selected by the manufacturer, between said two compression stages ((I), (II));
wherein said interconnection device (100; 100*; 100**) comprises a first dividing plate (70) and a second dividing plate (80), which are packed one on the other;
wherein each dividing plate (70, 80) comprises a respective main body (70A, 80A) with four respective slots (70D, 70E, 70F, 70G; 80D, 80E, 80F, 80G), and one respective opening (70H; 80H) which is associated with a respective longitudinal recess (70L; 80L).

### Claim 4 (depends on 3)

A two-stage rotary compressor (10), according to claim 3, characterised in that said first dividing plate (70) and said second dividing plate (80) are identical.

### Claim 5 (depends on 3)

A two-stage rotary compressor (10), according to claim 3, characterised in that the two longitudinal recesses (70L; 80L) face one another to form a channel (95).

### Claim 6 (depends on 5)

A two-stage rotary compressor (10), according to claim 5, characterised in that at least a portion of said channel (95) establishes a fluid communication between an inlet opening (70H), which is provided on said first dividing plate (70), and an outlet opening (80H), which is provided on said second dividing plate (80).

### Claim 7 (depends on 6)

A two-stage rotary compressor (10), according to claim 6, characterised in that, when said interconnection device (100*) is configured so as to establish a communication “in series” between said two compression stages ((I), (II)), said inlet opening (70H) is arranged in an upper part of said first dividing plate (70), whereas said outlet opening (80H) is arranged in a lower part of said second dividing plate (80).

### Claim 8 (depends on 6)

A two-stage rotary compressor (10), according to claim 6, characterised in that, when said interconnection device (100**) is configured so as to establish a communication “in parallel” between said two compression stages ((I), (II)), both said inlet opening (70H) and said outlet opening (80H) are arranged in respective upper parts of said first dividing plate (70) and of said second dividing plate (80).

### Claim 9 (depends on 8)

A two-stage rotary compressor (10), according to claim 8, characterised in that, when said interconnection device (100**) is configured so as to establish a communication “in parallel” between said two compression stages ((I), (II)), the air is directly supplied to said second compression stage (II) by means of a through hole (30B) provided on said head (30).