Mechanical drive assembly incorporating counter-spring biased, radially-adjustable rollers

An anti-friction nut for engagement with an elongate shaft-like member having a groove with opposed walls, said nut comprising in combination:

• a) a nut body having an axial bore which is adapted to receive the elongate shaft-like member,
• b) said nut body having a radial bore communicating with the axial bore thereof,
• c) an anti-friction roller having at one end a nose portion,
• d) mounting means including an anti-friction bearing, turnably mounting the roller in the radial bore such that the nose portion of the roller extends into said axial bore and engages one wall of the groove of said elongate shaft-like member,
• e) a spring carried in the radial bore of the nut body, said spring engaging said bearing and thereby biasing the roller in a radially outward direction away from said elongate shaft-like member, and
• f) adjustment means carried by the nut body in said radial bore and disposed radially outwardly of said bearing, said adjustment means being operable to positively back up and effect adjustable movement of the roller in radial directions,
• g) the engagement of said spring with the bearing acting to bias the latter radially outward against said adjustment means so as to take up any looseness of the bearing,
• h) said adjustment means comprising a plug carried in the radial bore of the nut body,
• i) said plug having a tool-engageable means by which the plug can be adjustably turned, and
• j) means rendering said tool-engageable means inoperable following adjustment of the plug, to resist attempts to subsequently turn the plug following adjustment.

An anti-friction nut for engagement with an elongate shaft-like member having a groove with opposed walls, said nut comprising in combination:

• a) a nut body having an axial bore which is adapted to receive the elongate shaft-like member,
• b) said nut body having a radial bore communicating with the axial bore thereof,
• c) an anti-friction roller having at one end a nose portion,
• d) mounting means including an anti-friction bearing, turnably mounting the roller in the radial bore such that the nose portion of the roller extends into said axial bore and engages one wall of the groove of said elongate shaft-like member,
• e) a spring carried in the radial bore of the nut body, said spring engaging said bearing and thereby biasing the roller in a radially outward direction away from said elongate shaft-like member,
• f) adjustment means carried by the nut body in said radial bore and disposed radially outwardly of said bearing, said adjustment means being operable to positively back up and effect adjustable movement of the roller in radial directions,
• g) the engagement of said spring with the bearing acting to bias the latter radially outward against said adjustment means so as to take up any looseness of the bearing,
• h) said adjustment means comprising a plug carried in the radial bore of the nut body, and
• i) adhesive means providing a tamper-resistant seal for said plug, to thereby resist attempts, following adjustment of the plug, to subsequently turn the plug after the adhesive cures.

An anti-friction nut for engagement with an elongate shaft-like member having a groove with opposed walls, said nut comprising in combination:

• a) a nut body having an axial bore which is adapted to receive the elongate shaft-like member,
• b) said nut body having a radial bore communicating with the axial bore thereof,
• c) an anti-friction roller having at one end a nose portion,
• d) mounting means including an anti-friction bearing, turnably mounting the roller in the radial bore such that the nose portion of the roller extends into said axial bore and engages one wall of the groove of said elongate shaft-like member,
• e) a spring carried in the radial bore of the nut body, said spring engaging said bearing and thereby biasing the roller in a radially outward direction away from said elongate shaftlike member, and
• f) adjustment means carried by the nut body in said radial bore and disposed radially outwardly of said bearing, said adjustment means being operable to positively back up and effect adjustable movement of the roller in radial directions,
• g) the engagement of said spring with the bearing acting to bias the latter radially outward against said adjustment means so as to take up any looseness of the bearing.