Fluid actuated nut

Details Fluid actuated nut Fluid actuated nut

B - Operations, Transporting

23

P

26/103, 85/4

B23P 19/06 (2006.01) B25B 29/02 (2006.01) F16B 31/04 (2006.01)

Patent

CA 1255520

FLUID ACTUATED NUT Abstract of the Disclosure A fluid actuated nut having a cylindrical casing engageable at an inner end with a base, the casing containing a coaxial relatively axially shiftable plunger having an inwardly opening partial central bore for threadedly receiving a shank of a bolt, a compression spring acting outwardly on the plunger and inwardly against the casing, and a fluid pressure chamber in the casing outwardly of the piston, the nut being applied by screwing the piston onto the bolt shank to the point of engage- ment of the inner end of the casing with the base and tightened by sequentially compressing the spring by fluid injected under pressure in the fluid chamber for shifting the casing away from the base, turning the casing to reengage the base and releasing the fluid pressure to expand the spring, and repeating the sequence as necessary to produce the desired tensile and/or compressive force, the nut being loosened by applying fluid pressure to advance the plunger for compressing the spring and disengaging the casing from the base.

495154

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