# US 10,371,293 B2 · Movement-constraining assembly for fluid-conveying system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,371,293 B2 - Document ID: US10371293B2 - Status: Granted - Kind: B2 - Application number: 14/306,729 - Filed: 2014-06-17 - Published: 2015-12-17 - Granted: 2019-08-06 - Earliest claimed: 2014-06-17 - Assignees: Pratt & Whitney Canada Corp. - Applicants: Pratt & Whitney Canada Corp. - Inventors: Guy Lefebvre; John Pietrobon - Web page: https://patentgrep.com/patent/US10371293B2 ## CPC - F16L 19/005: {comprising locking means for the threaded member} - F16L 15/08: with supplementary elements (F16L15/04 takes precedence) - F16L 2201/20: Safety or protective couplings - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL ## Abstract A movement-constraining assembly for a fluid-conveying system comprises a tubular body adapted to be secured to a component coupling end of a component of the fluid-conveying system. A fluid-conveying tube has a tube coupling end adapted to be connected to the component of the fluid-conveying system and defining an inner passage for fluid to pass therethrough to or from the component, the tube having an interface at the tube coupling end. A blocking nut has an inner surface complementary to at least a surface of the interface of the tube to block rotation between the tube and the blocking nut, the blocking nut further comprising an outer surface complementary to a surface of the tubular body to block rotation between the blocking nut and the component, whereby the blocking nut blocks a rotation between the fluid-conveying tube and the component coupling end. ## Claims ### Claim 1 A movement-constraining assembly for a fluid-conveying system, comprising: a tubular body adapted to be secured to a component coupling end of a component of the fluid-conveying system; a fluid-conveying tube having a tube coupling end adapted to be connected to the component of the fluid-conveying system and defining an inner passage for fluid to pass therethrough to or from the component, the tube having an interface at the tube coupling end; and a blocking nut having an annular body, an inner surface defining at least one first projection protruding radially inwardly from the annular body, the inner surface complementary to at least a surface of the interface of the tube to block rotation between the tube and the blocking nut, the blocking nut further comprising an outer surface defining at least one second projection protruding radially outwardly from the annular body, the outer surface complementary to a surface of the tubular body to block rotation between the blocking nut and the component, the annular body located radially between the fluid-conveying tube and the tubular body relative to a longitudinal axis of the fluid-conveying tube, whereby the blocking nut blocks a rotation between the fluid-conveying tube and the component coupling end. ### Claim 2 (depends on 1) The movement-constraining assembly according to claim 1, wherein the interface of the fluid-conveying tube is integrally formed thereon. ### Claim 3 (depends on 2) The movement-constraining assembly according to claim 2, wherein the interface of the fluid-conveying tube is a body having a hexagonal section or quasi-hexagonal section. ### Claim 4 (depends on 1) The movement-constraining assembly according to claim 1, further comprising a retaining ring, and wherein the fluid-conveying tube has a circumferential groove formed in the interface for receiving the retaining ring, the retaining ring blocking movement of the blocking nut along the fluid-conveying tube to maintain the blocking nut engaged to the interface. ### Claim 5 (depends on 4) The movement-constraining assembly according to claim 4, wherein the retaining ring is an external circlip. ### Claim 6 (depends on 1) The movement-constraining assembly according to claim 1, wherein the complementary surfaces between the tube and the blocking nut form an indexing joint. ### Claim 7 (depends on 1) The movement-constraining assembly according to claim 1, wherein the at least one first projection defined by the inner surface of the blocking nut includes a plurality of first projections, a plurality of axial channels defined between the first projections for complementary engagement of the blocking nut onto the interface of the fluid-conveying tube. ### Claim 8 (depends on 7) The movement-constraining assembly according to claim 7, wherein the interface has edges received in the axial channels, the number of axial channels being a multiple of the number of edges to define indexed orientations between the blocking nut and the interface. ### Claim 9 (depends on 8) The movement-constraining assembly according to claim 8, wherein the number of axial channels is a multiple of at least two of the number of edges. ### Claim 10 (depends on 8) The movement-constraining assembly according to claim 8, wherein the outer surface of the blocking nut and the surface of the tubular body complementarily define a plurality of indexed orientations, with the plurality of indexed orientations between the blocking nut and the tubular body not being a multiple of the number of edges of the interface. ### Claim 11 (depends on 1) The movement-constraining assembly according to claim 1, wherein the tube coupling end of the fluid-conveying tube has threads for screwing engagement with the component of the fluid-conveying system. ### Claim 12 (depends on 1) The movement-constraining assembly according to claim 1, wherein the tubular body has a portion with a hexagonal section or quasi-hexagonal section. ### Claim 13 (depends on 1) The movement-constraining assembly according to claim 1, wherein the at least one second projection defined by the outer surface of the blocking nut comprises at least one lug protruding radially outwardly from the annular body, and the surface of the tubular body comprises a crenellated rim, the at least one lug received in at least one depression in the crenellated rim. ### Claim 14 (depends on 1) The movement-constraining assembly according to claim 1, wherein the blocking nut is a monolithic metal sheet piece. ### Claim 15 (depends on 1) The movement-constraining assembly according to claim 1, wherein the tubular body is integrally part of the component coupling end. ### Claim 16 (depends on 1) The movement-constraining assembly according to claim 1, wherein the inner surface, the at least one first projection, the outer surface, and the at least one second projection all project axially from a common plane normal to the longitudinal axis. ### Claim 17 A movement-constraining assembly for a fluid-conveying system, comprising: a tubular body adapted to be secured to a component coupling end of a component of the fluid-conveying system; a fluid-conveying tube having a tube coupling end adapted to be connected to the component of the fluid-conveying system and defining an inner passage for fluid to pass therethrough to or from the component, the tube having an interface at the tube coupling end; and a blocking plate having a radially inner surface complementary to at least a surface of the interface of the tube to block rotation between the tube and the blocking plate, the blocking plate further comprising a radially outer surface complementary to a surface of the tubular body to block rotation between the blocking plate and the component, the radially inner surface being axially aligned with the radially outer surface relative to a longitudinal axis of the fluid-conveying tube, whereby the blocking plate blocks a rotation between the fluid-conveying tube and the component coupling end. ### Claim 18 (depends on 17) The movement-constraining assembly of claim 17, further comprising a retaining ring, and wherein the fluid-conveying tube has a circumferential groove formed in the interface for receiving the retaining ring, the retaining ring blocking movement of the blocking plate along the fluid-conveying tube to maintain the blocking plate engaged to the interface. ### Claim 19 (depends on 17) The movement-constraining assembly according to claim 17, wherein the inner surface of the blocking plate has a plurality of axial channels defined therein for complementary engagement of the blocking plate onto the interface of the fluid-conveying tube. ### Claim 20 (depends on 17) The movement-constraining assembly according to claim 17, wherein the outer surface of the blocking plate comprises at least one lug, and the surface of the tubular body comprises a crenellated rim, the at least one lug received in at least one depression in the crenellated rim.