Temporary fastener installation tooling and associated installation set

Patent metadata

Field	Value
Publication number	US-12496691-B2
Application number	US-202418779792-A
Country	US
Kind code	B2
Filing date	Jul 22, 2024
Priority date	Jul 28, 2023
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

An installation tool ( 14 ) has a tool body ( 50 ) comprising a first opening capable of blocking the axial end of the body ( 26 ) of a fastener ( 12 ) and an actuating device ( 52 ), rotatable relative to the tool body and comprising a second opening capable of blocking a fastener actuating element ( 28 ). The tool includes a pressure chamber ( 120 ) in the tool body a duct ( 122 ) connecting the pressure chamber to the first opening ( 62 ), a blocking element ( 124 ), movable in the duct between a retracted position and a projecting position; and a fluid inlet ( 55 ) opening onto the pressure chamber. An inflow of fluid into the pressure chamber moves the blocking element ( 124 ) to the protruding position.

First claim

The invention claimed is:

1 . An installation tooling for assembling a fastener to at least two pre-drilled structures, the fastener including a fastener body extending along a first axis and an actuating element projecting from an axial end of the fastener body, the actuating element being rotatable relative to the fastener body, the installation tooling comprising:
a tubular tool body extending along a second axis and including an axial end with a first opening, the first opening being configured to receive the axial end of the fastener body and to block rotation of the axial end of the fastener body; an actuating device received inside the tubular tool body, rotatable relative to the tubular tool body and defining an internal cavity and an axial end with a second opening, the second opening being configured to open into the internal cavity, to receive the actuating element of the fastener and to prevent rotation of the actuating element of the fastener; an annular pressure chamber formed in the tubular tool body around the first opening; at least one duct, positioned radially relative to the second axis, connecting the annular pressure chamber to the first opening; at least one blocking element that is movable in the at least one duct between a retracted position and a projecting position where the at least one blocking element projects into the first opening; and a first fluid inlet opening into the annular pressure chamber; wherein the installation tooling is configured so that a fluid inlet into the annular pressure chamber is able to move the at least one blocking element towards the protruding position.

2 . An installation tooling according to claim 1 , wherein
the actuating device comprises a wrench, configured to be driven in rotation by a motor, and a wrench body that includes the cavity and the second opening; and an axial clearance is provided between the wrench and the wrench body.

3 . An installation tooling according to claim 1 , wherein
at least one of the first and second openings is equipped with a roller cage or anti-rotation shape that is configured to rotationally block an external surface of the fastener body and/or the actuating element of the fastener.

4 . An installation tooling according to claim 1 , wherein
the at least one duct comprises a plurality of ducts angularly distributed around the second axis; and the at least one blocking element comprises a plurality of blocking elements, each of the blocking elements being movable in respective ones of the ducts between the retracted position and the projecting position.

5 . An installation tooling according to claim 4 , wherein
the blocking elements comprise balls.

6 . An installation tooling according to claim 1 , further comprising:
an ejector piston, axially movable in the internal cavity, so as to define an ejection chamber inside the internal cavity; and a second fluid inlet, opening into the ejection chamber; wherein the installation tooling is configured so that a fluid overpressure in the ejection chamber is able to move the ejector piston towards the second opening.

7 . An installation tooling according to claim 6 , further comprising:
an ejector rod extending along the second axis in the internal cavity of the actuating device, a first end of the ejector rod being attached to the ejector piston, a second end of the ejector rod being oriented towards the first opening of the tubular tool body.

8 . An installation tooling according to claim 7 , further comprising:
a compression spring positioned in the internal cavity around the ejector rod, between an inner crown of the actuating device, positioned close to the second opening, and the piston.

9 . An installation set, comprising:
a fastener, for temporary assembly of at least two previously drilled structures, including a fastener body that extends along a first axis and an actuation element that projects from an axial end of the fastener and is rotatably movable with respect to the fastener body; and an installation tooling according to claim 1 .

10 . An installation set according to claim 9 , wherein the fastener body comprises a fastener body blocking element configured to couple with the at least one blocking element of the installation tooling in the projecting position, so as to axially lock the fastener body in the first opening of the tubular tool body.

Assignees

• Lisi Aerospace

Inventors

• Brachet Julien

Classifications

• F16B19/109

  Temporary rivets, e.g. with a spring-loaded pin (special clamping devices for workpieces to be riveted together, e.g. operating through the rivet holes B21J15/42; hand tools for temporarily connecting sheets before or during assembly operations B25B31/005) · CPC title

• B25B31/005 Primary

  for temporarily connecting sheets before or during assembly operations · CPC title