The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2026
Filed:
Nov. 01, 2022
Renishaw Plc, Wotton-under-Edge, GB;
William David Stockill, Wotton-under-Edge, GB;
RENISHAW PLC, Wotton-Under-Edge, GB;
Abstract
A tool measurement apparatus for a machine tool includes a transmitter portion including a light source for generating a light beam and a receiver portion including a detector for detecting the light beam, the light beam being passed from the light source to the detector along an optical path. At least one of the receiver portion and the transmitter portion includes a protection device including a gas expulsion aperture configured to expel a bleed gas supplied from an external gas source. The optical path also passes through the gas expulsion aperture. The protection device further includes a check valve located in the optical path. The bleed gas is supplied to the gas expulsion aperture through the check valve and the flow of the bleed gas through the check valve causes the check valve to adopt an open configuration defining a passageway through which the light beam can pass.