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A mechanical shock and sway arrestor to be interposed between piping, related equipment and a stationary support, the parts of which are constructed and arranged to automatically change the effective length of the arrestor in response to thermally induced movements of the piping and to subtantially

A mechanical shock and sway arrestor to be interposed between piping, related equipment and a stationary support, the parts of which are constructed and arranged to automatically change the effective length of the arrestor in response to thermally induced movements of the piping and to subtantially instantaneously convert the arrestor into a rigid strut in the event that the piping is subjected to shock-loading or vibration of substantial amplitude.The arrestor includes a housing for a ball screw and a ball nut threaded over the ball screw or equivalent acme screw. The ball screw is resiliently mounted and has a flywheel secured thereto centrally diposed between two clutch plates which engage the flywheel when the screw moves in response to movement of the piping thereby effectively arresting such motion and altering the effective length of the arrestor.

대표청구항 ▼

A mechanical shock and sway arrestor adapted to be interposed between piping and a stationary support for said piping wherein said mechanical shock and sway arrestor comprises a housing having a tubular wall having first and second end walls which are externally threaded for engaging internal thread

A mechanical shock and sway arrestor adapted to be interposed between piping and a stationary support for said piping wherein said mechanical shock and sway arrestor comprises a housing having a tubular wall having first and second end walls which are externally threaded for engaging internal threads of said tubular wall and wherein said first end wall has a first central opening for threadably receiving a tubular extension which in turn has a central opening for receiving an ear which is secured to said tubular extension by screw means which ear connects one end of said arrestor to said fixed support; said second end wall having a second tubular extension formed integrally therewith and extending longitudinally thereof; an outer sleeve disposed about said second tubular extension and extending coaxial therewith and secured to a second ear which second ear connects one end of said arrestor to said piping; said second ear having internal threads for engaging threads on an inner sleeve which extends longitudinally of said second tubular extension and said outer sleeve and coaxial therewith; a ball nut fixedly secured against rotation and disposed within said second tubular extension and connected to one end of said inner sleeve; first and second parallel and spaced apart clutch plates disposed in said housing having external threads formed on their periphery for engaging internal threads formed in said tubular wall and having central openings formed there through; a flywheel disposed in said housing and between said clutch plates and having a central opening formed there through coaxial with said central openings formed in said clutch plates; a screw member disposed in said housing and extending longitudinally and coaxial with said inner and outer sleeves and said second tubular extension and extending through said central openings formed through said clutch plates and said flywheel and through a threaded opening formed through said ball nut; a first collar disposed about said screw member in said housing and disposed between said first end wall and said first clutch plate and coating with a sleeve disposed in said central opening formed in said first clutch plate; a second collar disposed about said screw member in spaced apart parallel relationship with said first collar and disposed in said housing and disposed between said first collar and said first end wall said second collar coacting with an adjustable sleeve which is also disposed about said screw member; a spring disposed in said housing about said screw member and positioned between said first and said second collars; and, a ball bearing disposed in said central opening of said threaded tubular extension for rotatably supporting said screw member whereby in response to longitudinally axial movement of said piping causing said inner and outer sleeves and said screw member to also move axially, in either direction, one of said clutch plates will engage said flywheel stopping further axial movement and forming a rigid strut of the mechanical shock and sway arrestor and effectively shortening its length which will be returned to its normal length by said spring when the axial force is removed.