Connection device, method for manufacturing a connection deivce, screw sleeve

Patent metadata

Field	Value
Publication number	US-2021393096-A1
Application number	US-201917292040-A
Country	US
Kind code	A1
Filing date	Oct 28, 2019
Priority date	Nov 12, 2018
Publication date	Dec 23, 2021
Grant date	—

Abstract

A connection device for the fluidic connection of a suction tube to a function unit. The connection device includes a first hollow-cylindrical connection section and a second hollow-cylindrical connection section. One of the connection sections is connectable or connected to the suction tube and the other connection section is connectable or connected to the function unit. One of the connection sections is located at least partly within the other connection section and with its outer periphery bears on the inner periphery of the other connection section, where the two connection sections are rotatably mounted, in order to provide a rotation compensation for the suction tube, and where an electrical connection for providing an antistatic function exists between the two connection sections. The first connection section includes a spring section which is deformable in the radial direction and with which the bearing contact on the second connection element takes place.

First claim

1 - 14 . (canceled)

15 . A connection device for a fluidic connection of a suction tube to a function unit, wherein the connection device comprises:
a first connection section and a second connection section, wherein one of the connection sections is connectable or connected to the suction tube and the other connection section is connectable or connected to the function unit, wherein one of the connection sections is located at least partly within the other connection section and with its outer periphery bears on the inner periphery of the other connection section, wherein the two connection sections are rotatably mounted to one another, in order to provide a rotation compensation for the suction tube, wherein an electrical connection for providing an antistatic function exists between the two connection sections, and wherein the first connection section comprises a spring section which is deformable in the radial direction and with which the first connection section bears on the second connection section.

16 . The connection device according to claim 15 , wherein the spring section comprises one or plural slots.

17 . The connection device according to claim 16 , wherein the one or plural slots run in the axial direction of the first connection section.

18 . The connection device according to claim 16 , wherein the one or plural slots run up to a first face side of the first connection section.

19 . The connection device according to claim 16 , wherein the plural slots are arranged distributed around the periphery of the first connection section.

20 . The connection device according to claim 15 , wherein the spring section is an axial section of the first connection section.

21 . The connection device according to claim 15 , wherein the spring section in a non-deformed state defines the maximal outer circumference of the first connection section.

22 . The connection device according to claim 15 , wherein the first connection section is a screw sleeve.

23 . The connection device according to claim 15 , wherein the second connection section is a bushing or a section of a bushing.

24 . An arrangement, comprising:
a suction tube, a function unit, and a connection device, wherein the connection device provides an electrical and fluidic connection between the suction tube and the function unit, wherein the connection device comprises a first connection section and a second connection section, wherein one of the connection sections is connected to the suction tube and the other connection section is connected to the function unit, wherein one of the connection sections is located at least partly within the other connection section and with its outer periphery bears on the inner periphery of the other connection section, wherein the two connection sections are rotatably mounted to one another, in order to provide a rotation compensation for the suction tube, wherein an electrical connection for providing an antistatic function exists between the two connection sections, and wherein the first connection section comprises a spring section which is deformable in the radial direction and with which the first connection section bears on the second connection section is provided.

25 . A method for manufacturing a connection device for the fluidic connection of a suction tube to a function unit, wherein the connection device comprises a first connection section and a second connection section, wherein one of the connection sections is connectable or connected to the suction tube and the other connection section is connectable or connected to the function unit, wherein one of the connection sections is located at least partly within the other connection section and with its outer periphery bears on the inner periphery of the other connection section, wherein the two connection sections are rotatably mounted to one another, in order to provide a rotation compensation for the suction tube, wherein an electrical connection for providing an antistatic function exists between the two connection sections, and wherein the first connection section comprises a spring section which is deformable in the radial direction and with which the first connection section bears on the second connection section, the method comprising the steps:
manufacturing the first connection section with a first manufacturing tolerance, according to which the outer diameter of the first connection section is situated in a first tolerance range, manufacturing the second connection section with a second manufacturing tolerance, according to which the inner diameter of the second connection section is situated in a second tolerance range, wherein the upper limit values of the first tolerance range is larger than the lower limit value of the second tolerance range.

26 . The method according to claim 25 , wherein the upper limit value of the first tolerance range is at least 0.1 mm larger than the lower limit value of the second tolerance range.

27 . The method according to claim 25 , wherein the lower limit value of the first tolerance range is maximally 0.4 mm smaller than the upper limit value of the second tolerance range.

28 . A screw sleeve of an electrically conductive plastic, comprising:
a hollow-cylindrical base section which comprises a thread with which the screw sleeve can be screwed onto a suction tube, further comprising a hollow-cylindrical spring section which follows the base section in the axial direction, said spring section comprising a plurality of slots which run in the axial direction, said spring section being elastically deformable inwards in the radial direction and in a non-deformed state defining the maximal outer periphery of the screw sleeve.

29 . The connection device according to claim 15 , wherein the first connection section is hollow-cylindrical and/or the second connection section is hollow-cylindrical.

30 . The connection device according to claim 22 , wherein the screw sleeve is of an electrically conductive plastic and comprises a hollow-cylindrical base section which comprises a thread with which the screw sleeve can be screwed onto a suction tube, the screw sleeve further comprising a hollow-cylindrical spring section which follows the base section in the axial direction, said spring section comprising a plurality of slots which run in the axial direction, said spring section being elastically deformable inwards in the radial direction and in a non-deformed state defining the maximal outer periphery of the screw sleeve.

31 . The connection device according to claim 30 , wherein the thread is an inner thread.

32 . The arrangement according to claim 24 , wherein the function unit comprises a suction apparatus, a tool and/or a nozzle.

Assignees

• Festool Gmbh

Inventors

• Maier Steffen

Classifications

• F16L33/24

  with parts screwed directly on or into the hose (F16L33/22 takes precedence) · CPC title

• A47L7/0095

  Suction cleaners or attachments adapted to collect dust or waste from power tools · CPC title

• A47L9/242 Primary

  Hose or pipe couplings · CPC title

• F16L27/0812 Primary

  with slide bearings · CPC title

• F16L25/01

  specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof · CPC title