US 2014/0348610 A1Published application

Dual Actuated Jackscrew Nut And/Or Bolt Head

OwnerJohn D. Davisinventor

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Abstract

A jackscrew nut and/or bolt head assembly includes a circumferentially and radially interlocked bottom washer. Spherical faces at the washer top are thereby held in alignment with corresponding spherical jackscrew bottoms, which assures evenly distributed contact pressures during out of angle elastic jackscrew displacement during jackscrew loading. The bottom washer interlock may provide further for a transfer of a primary torque exerted onto the main body of the nut and/or bolt head via an outside spline such as well known triple square, twelve spline or the like, which may be incorporated also into the bottom washer for a concurrent application of an external torque. The assembly may be initially tightened via the primary torque whereby secondary jackscrew actuation and displacement is greatly reduced.

Claims25

Dependent claims

A jackscrew tightening assembly comprising:

a. a central thread with a central thread axis;
b. a main body radially outward extending with respect to said central thread, said main body comprising:
i. a main top;
ii. a main bottom that is opposite said main top in axial direction with respect to said central thread axis;
iii. a through hole with a through hole axis being in an offset to said central thread axis;
iv. a secondary thread at least along a portion of said through hole;
c. a jackscrew that is extending through said through hole and that is engaging with said secondary thread, said jackscrew comprising:
i. a jackscrew head that is facing away from said main bottom;
ii. a spherical bottom that is facing away from said main top
d. a bottom washer that is adjacent to said main bottom and that is surrounding said central thread, said bottom washer comprising:
i. a washer top that is facing said main bottom;
ii. a spherical face that is formed into said washer top and that is in substantial axial alignment with said spherical bottom with respect to said central thread axis and that is matching said spherical bottom;
e. a washer interlock that is circumferentially and radially holding said bottom washer with said main body, said washer interlock comprising:
i. a first interlock feature being part of said bottom washer;
and
ii. a second interlock feature that is circumferentially and radially mating said first interlock and that is part of said main body such that said spherical face is held in alignment with said spherical bottom.

13 more elements

A jackscrew tightening assembly comprising:

a. a central thread with a central thread axis;
b. a main body radially outward extending with respect to said central main thread, said main body comprising:
i. a main top;
ii. a main bottom that is opposite said top side in axial direction with respect to said central thread axis;
iii. a through hole with a through hole axis being in an offset to said central thread axis;
iv. a secondary thread at least along a portion of said through hole;
c. a jackscrew that is extending through said through hole and that is engaging with said secondary thread, said jackscrew comprising:
i. a jackscrew head that is facing away from said main bottom;
ii. a spherical bottom that is facing away from said main top;
iii. an interlock shaft adjacent said spherical bottom;
d. a bottom washer that is adjacent to said main bottom and that is surrounding said central thread, said bottom washer comprising:
i. a receptacle that is formed into said bottom washer and that is circumferentially and radially holding said bottom washer with said jackscrew via said interlock shaft;
and
ii. a spherical face that is in substantial axial alignment with said spherical bottom with respect to said central thread axis.

11 more elements

Dependencies are inferred from the claim text.