# US 12,768,485 B2 · Inversion unit with window

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- Number: US 12,768,485 B2
- Document ID: US12768485B2
- Status: Granted
- Kind: B2
- Application number: 18/484,208
- Filed: 2023-10-10
- Published: 2024-07-18
- Granted: 2026-10-20
- Earliest claimed: 2023-01-17
- Assignees: Sacpro AB
- Applicants: Sacpro AB
- Inventors: Fredrik Sterner; Jockum Broden; Fredrik Åhslund
- Web page: https://patentgrep.com/patent/US12768485B2

## CPC

- F16L 55/1651: {the flexible liner being everted}
- B65H 75/403: {Carriage with wheels}
- B65H 75/4471: {Housing enclosing the reel}
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

An inversion unit includes: a housing, a reel for a liner partially arranged in the housing, and a base assembly, the housing being arranged on the base assembly. The housing includes: a gas inlet, an outlet for the liner, an opening including a window, and a bayonet catch for closing and opening the window, the bayonet catch configured to be maneuvered into an open position in which the window is open and unlocked and a closed position in which the window is closed and locked. The bayonet catch includes: a motion link assembly, a projection assembly configured to engage with the motion link assembly, a handle, and a hinge. The handle is pivotably connected to the hinge.

## Claims

### Claim 1

An inversion unit comprising:
a housing,
a reel for a liner partially arranged in the housing, and
a base assembly, the housing being arranged on the base assembly, wherein:
said housing comprises:
a gas inlet,
an outlet for the liner,
an opening comprising a window, and
a bayonet catch for closing and opening the window, said bayonet catch configured to be maneuvered into an open position in which the window is open and unlocked and a closed position in which the window is closed and locked,
the bayonet catch comprises:
a motion link assembly,
a projection assembly configured to engage with the motion link assembly,
a handle, and
a hinge, wherein:
the handle is pivotably connected to the hinge,
one of the motion link assembly or the projection assembly is arranged on the window and the other of the projection assembly or the motion link assembly is arranged on an edge of the opening,
the hinge is arranged on the housing,
the handle is pivotably connected to the window so that the window can be opened and closed in a bayonet catch manner using the handle, and
the motion link assembly comprises guides oriented so that the window slides in a linear motion relative to the housing when the handle is operated.

### Claim 2 (depends on 1)

The inversion unit according to claim 1, wherein the window comprises a seal configured to seal the opening when the bayonet catch is in the closed position.

### Claim 3 (depends on 1)

The inversion unit according to claim 1, wherein the opening is larger than the outlet for the liner.

### Claim 4 (depends on 1)

The inversion unit according to claim 1, wherein the handle is a lever configured to be moved towards the housing for maneuvering the bayonet catch into the closed position and configured to be moved away from the housing for maneuvering the bayonet catch into the open position.

### Claim 5 (depends on 1)

The inversion unit according to claim 1, wherein the window is configured to be rotated away from the opening when the bayonet catch is in the open position.

### Claim 6 (depends on 1)

The inversion unit according to claim 1, wherein the opening is substantially rectangular.

### Claim 7 (depends on 1)

The inversion unit according to claim 1, wherein the housing further comprises a gas outlet.

### Claim 8 (depends on 1)

The inversion unit according to claim 1, wherein the base assembly is configured to be disconnected from the housing, and wherein the base assembly comprises a base and wheels.

### Claim 9 (depends on 8)

The inversion unit according to claim 8, wherein the base assembly further comprises at least one swivelling wheel.

### Claim 10 (depends on 1)

The inversion unit according to claim 1, wherein the window further comprises a glass, and a frame embedding the glass of the window, said frame being pivotably connected to the handle, and said frame comprising the motion link assembly or the projection assembly.

### Claim 11 (depends on 1)

The inversion unit according to claim 1, wherein the motion link assembly is arranged in a first plane that is oriented perpendicular to a second plane defined by the window, and wherein the projection assembly projects in a direction perpendicular to the first plane.