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Patent Searching and Data


Title:
SPEED SENSOR COMPRISING INSULATING INNER AND OUTER RECESSES
Document Type and Number:
WIPO Patent Application WO/2019/137888
Kind Code:
A1
Abstract:
The invention relates to a speed sensor (100) for measuring the speed of an object moving relative to the speed sensor (100), comprising a speed sensor housing (111) which is provided for sliding and/or frictional and/or integral insertion into a fixed receptacle, wherein the speed sensor housing (111) houses an injection moulded plastic part (107), into which at least one portion of a speed sensor element (104, 105) has been injected. The invention provides that • a) the injection moulded part (107) has at least one outer recess (116) on its outer peripheral face (113) pointing towards an inner face (112) of a wall of the speed sensor housing (111), wherein an empty outer chamber is formed between each boundary surface of an outer recess (116) and the inner surface (112) of the wall of the speed sensor housing (111), and/or that • b) at least one inner recess (119), which forms an empty inner chamber, is formed inside the injection moulded part (107). The chambers, which are filled with air or are partially or fully evacuated, are intended to impede the transfer of heat from the housing to the injection moulded part or the transport of heat inside the injection moulded part.

Inventors:
KLUFTINGER ANDRE (DE)
LECHNER KLAUS (DE)
BLESSING MICHAEL (DE)
KLEIN GÜNTER (DE)
Application Number:
EP2019/050285
Publication Date:
July 18, 2019
Filing Date:
January 08, 2019
Export Citation:
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Assignee:
KNORR BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH (DE)
International Classes:
G01P1/02
Foreign References:
DE19580281C22002-03-07
DE102004016430B32005-09-01
DE202010009785U12010-10-07
DE19744673A11999-05-06
GB2361284A2001-10-17
US20040126562A12004-07-01
DE4331969C21998-10-29
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