US 8,997,367 B2Granted

Length measuring instrument

AssigneeDr. Johannes Heidenhain GmbH

InventorsMarkus Schmöller, Michael Steber, Yusuke Kitano

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Abstract

A length measuring instrument that includes a hollow profile section extending in a longitudinal direction, wherein the hollow profile section includes a slot extending in the longitudinal direction and covered by sealing elements. A scale is disposed inside the hollow profile section, wherein the scale includes a measurement graduation which can be scanned by a scanning unit. An end piece is connected to the hollow profile section, wherein the end piece closes the hollow profile section on an end of the hollow profile section, the end piece including an insertion region with which the hollow profile section plunges into the hollow profile section. The length measuring instrument includes a clamping piece that connects the end piece to the hollow profile section, wherein the clamping piece spans the slot and which on two sides of the slot fixes the hollow profile section to the insertion region of the end piece.

Claims18

Dependent claims

A length measuring instrument comprising:

a hollow profile section extending in a longitudinal direction, wherein said hollow profile section comprises a slot extending in said longitudinal direction and covered by sealing elements, wherein said hollow profile section is U-shaped and wherein said hollow profile section comprises:
two legs extending parallel to one another;
a base joining said two legs;
and
two protrusions facing said base and disposed on said two legs;
and
a scale disposed inside said hollow profile section, wherein said scale comprises a measurement graduation which for position measurement can be scanned by a scanning unit that is movable in said longitudinal direction relative to said hollow profile section;
an end piece connected to said hollow profile section, wherein said end piece is structured to close said hollow profile section on an end of said hollow profile section and for mounting on an object to be measured, said end piece comprising an insertion region with which said hollow profile section plunges into an interior of said hollow profile section;
and
a clamping piece that connects said end piece to said hollow profile section, wherein said clamping piece spans said slot and which on two sides of said slot fixes said hollow profile section to said insertion region of said end piece, wherein said clamping piece is screwed to said end piece, and said clamping piece presses said two protrusions against said insertion region of said end piece and affixes said two protrusions to said insertion region.

7 more elements

A length measuring instrument comprising:

a hollow profile section extending in a longitudinal direction, wherein said hollow profile section comprises a slot extending in said longitudinal direction and covered by sealing elements;
a scale disposed inside said hollow profile section, wherein said scale comprises a measurement graduation which for position measurement can be scanned by a scanning unit that is movable in said longitudinal direction relative to said hollow profile section;
an end piece connected to said hollow profile section, wherein said end piece is structured to close said hollow profile section on an end of said hollow profile section and for mounting on an object to be measured, said end piece comprising an insertion region with which said hollow profile section plunges into an interior of said hollow profile section;
and
a clamping piece that connects said end piece to said hollow profile section, wherein said clamping piece spans said slot and which on two sides of said slot fixes said hollow profile section to said insertion region of said end piece, wherein said clamping piece presses said sealing elements against said insertion region of said end piece.

2 more elements

A length measuring system comprising:

a scanning unit;
and
a length measuring instrument comprising:
a hollow profile section extending in a longitudinal direction, wherein said hollow profile section comprises a slot extending in said longitudinal direction and covered by sealing elements, wherein said hollow profile section is U-shaped and wherein said hollow profile section comprises:
two legs extending parallel to one another;
a base joining said two legs;
and
two protrusions facing said base and disposed on said two legs;
and
a scale disposed inside said hollow profile section, wherein said scale comprises a measurement graduation which for position measurement can be scanned by a scanning unit that is movable in said longitudinal direction relative to said hollow profile section;
an end piece connected to said hollow profile section, wherein said end piece is structured to close said hollow profile section on an end of said hollow profile section and for mounting on an object to be measured, said end piece comprising an insertion region with which said hollow profile section plunges into an interior of said hollow profile section;
and
a clamping piece that connects said end piece to said hollow profile section, wherein said clamping piece spans said slot and which on two sides of said slot fixes said hollow profile section to said insertion region of said end piece, wherein said clamping piece is screwed to said end piece, and said clamping piece presses said two protrusions against said insertion region of said end piece and affixes said two protrusions to said insertion region.

10 more elements

A length measuring system comprising:

a scanning unit;
and
a length measuring instrument comprising:
a hollow profile section extending in a longitudinal direction, wherein said hollow profile section comprises a slot extending in said longitudinal direction and covered by sealing elements;
a scale disposed inside said hollow profile section, wherein said scale comprises a measurement graduation which for position measurement can be scanned by a scanning unit that is movable in said longitudinal direction relative to said hollow profile section;
an end piece connected to said hollow profile section, wherein said end piece is structured to close said hollow profile section on an end of said hollow profile section and for mounting on an object to be measured, said end piece comprising an insertion region with which said hollow profile section plunges into an interior of said hollow profile section;
and
a clamping piece that connects said end piece to said hollow profile section, wherein said clamping piece spans said slot and which on two sides of said slot fixes said hollow profile section to said insertion region of said end piece, wherein said clamping piece presses said sealing elements against said insertion region of said end piece.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/778,686Filed 27 Feb 2013
Priority: DE 10 2012 203 2201 Mar 2012
Published: US 2013/0227853 A15 Sep 2013
Granted: 7 Apr 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

G01B 5/02
Measuring arrangements characterised by the use of mechanical techniques: for measuring length, width or thickness
G01D 5/34761
Linear encoders: protection devices, e.g. caps; Blowing devices
G01B
Measuring length, thickness or similar linear dimensions
G01D
Measuring not specially adapted for a specific variable