# US 2013/0153802 A1 · Shaft locking device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153802 A1 - Document ID: US20130153802A1 - Status: Published application - Kind: A1 - Application number: 13/716,476 - Filed: 2012-12-17 - Published: 2013-06-20 - Earliest claimed: 2011-12-15 - Assignees: Airbus Operations GmbH - Inventors: Job Telford Kingdom HUTCHINGS - Web page: https://patentgrep.com/patent/US20130153802A1 ## CPC - F16K 31/44: Mechanical actuating means - F16K 35/06: using a removable actuating or locking member, e.g. a key (F16K35/10, F16K35/12 take precedence) - F16K 35/10: with locking caps or locking bars - G05G 5/06: for holding members in one or a limited number of definite positions only ({G05G5/005}, G05G5/03, G05G5/05, G05G5/28 take precedence) - Y10T 74/20636: Detents - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - G05G: CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY ("Bowden" or like mechanisms F16C1/10; gearings or mechanisms not peculiar to this purpose F16H; speed changing or reversing mechanisms for gearings conveying rotary motion F16H59/00 - F16H63/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present application relates to a shaft locking device. The device has an locking element configured to be mounted on a shaft in a first position so that the locking element indicates the angular position of the shaft. The locking element is also configured to be mounted on a shaft in a second position so that the locking element is locatable against a stop to prevent rotation of the shaft. The present application also relates to a device for determining the angular position of a shaft, a valve assembly and an actuating unit for a valve. ## Claims ### Claim 1 A shaft locking device, comprising a locking element configured to be mounted on a shaft in a first position so that the locking element is free to rotate with the shaft, wherein the locking element is configured to be mounted on a shaft in a second position so that the locking element is locatable against a stop to prevent rotation of the shaft. ### Claim 2 (depends on 1) A shaft locking device according to claim 1, wherein the locking element comprises a shaft mounting collar to mount the locking element in the first position. ### Claim 3 (depends on 2) A shaft locking device according to claim 2, wherein the shaft mounting collar is a first shaft mounting collar, and the locking element further comprises a second shaft mounting collar to mount the locking element in the second position. ### Claim 4 (depends on 1) A shaft locking device according to claim 1, wherein the locking element comprising a locking portion configured to locate against a stop to prevent rotation of the shaft. ### Claim 5 (depends on 4) A shaft locking device according to claim 4, wherein the radial distance from the rotational axis of a shaft and the locking portion when the locking element is configured to be mounted on a shaft in its first position is less than the radial distance from the rotational axis of a shaft and the locking portion when the locking element is configured to be mounted on a shaft in its second position. ### Claim 6 (depends on 5) A shaft locking device according to claim 5, wherein the first shaft mounting collar is disposed on an opposing side of the first shaft mounting collar to the locking portion. ### Claim 7 (depends on 4) A shaft locking device according to claim 4, wherein the locking element further comprises a body forming the first and second shaft mounting collars and the locking portion extends from the collar. ### Claim 8 (depends on 7) A shaft locking device according to claim 7, wherein the distance between the locking portion and a first shaft mounting aperture is less than the distance between the locking portion and the second shaft mounting aperture. ### Claim 9 (depends on 4) A shaft locking device according to claim 4 wherein the locking portion is an indicator element configured to indicate the angular position of a shaft when the locking element is in its first position. ### Claim 10 (depends on 2) A shaft locking device according to claim 2, wherein the first shaft mounting collar further comprises a rotation prevention element configured to prevent rotation of the locking elementrelative to a shaft when the locking element is mounted on a shaft in the first position. ### Claim 11 (depends on 10) A shaft locking device according to claim 10, wherein the second shaft mounting collar further comprises a rotation prevention element configured to prevent rotation of a shaft relative to the locking element when the locking element is mounted on a shaft in the second position. ### Claim 12 (depends on 10) A shaft locking device according to claim 10, wherein the and/or each rotation prevention element is a spline. ### Claim 13 (depends on 1) A device for determining the angular position of a shaft comprising a shaft locking device according to claim 1. ### Claim 14 (depends on 13) A device according to claim 13, wherein the locking element is configured to act as an indicator element to indicate the angular position of a shaft when the locking element is mounted to a shaft in a first position. ### Claim 15 (depends on 1) An actuating unit for actuating a valve comprising a drive unit, a rotatable shaft for actuating a valve and a shaft locking device according to claim 1. ### Claim 16 (depends on 1) A valve assembly comprising a valve, a shaft for actuating the valve and a device according to claim 1. ### Claim 17 A valve assembly comprising a valve, a shaft for actuating the valve, a locking element mountable to the shaft and a stop, wherein the locking element is configured to be mounted on the shaft in a first position so that the locking element is free to rotate with the shaft, and is configured to be mounted to the shaft in a second position so that the locking element is locatable against the stop to prevent rotation of the shaft and maintain the valve in a pre-determined operating position. ### Claim 18 (depends on 17) A valve assembly according to claim 17, further comprising a housing, wherein the stop is formed on the housing. ### Claim 19 (depends on 18) A valve assembly according to claim 18, wherein the stop is a slot formed in the housing. ### Claim 20 (depends on 19) A valve assembly according to claim 19, wherein the stop comprises a lug against which the locking element is locatable. ### Claim 21 (depends on 16) A valve assembly according to claim 16, further comprising an drive unit to drive the shaft.