Joints and connections – Articulated members – Pivoted
Patent
1974-07-01
1976-03-16
Kundrat, Andrew V.
Joints and connections
Articulated members
Pivoted
403138, F16C 1106
Patent
active
039443760
ABSTRACT:
A constant torque ball joint employs upper and lower bearing pieces made of a self-lubricating material to journal the ball portion of a ball stud with their segmental semi-spherical internal surfaces and also employs upper and lower elastic material blocks having a longitudinal elastic modulus Eo of 1.5 to 10 kg/mm.sup.2 to substantially enclose tightly respectively the outer surfaces of the upper and lower bearing pieces. The upper and lower bearing pieces and the upper and lower elastic blocks with the ball portion of the ball stud are mounted whereby a small space is left between the upper and lower bearing pieces which are inserted in the socket cavity of a metallic socket joint rod. A metallic cover disc is applied over these inserted members and the end rim of the socket cavity is swaged to crimp the cover disc to substantially completely enclose the bearing pieces and the elastic blocks within the socket cavity and the cover disc. The elastic blocks are kept in a state of elastic compression at an elastic compression rate of 20 percent or less.
REFERENCES:
patent: 2424455 (1947-07-01), Graham et al.
patent: 2855232 (1958-10-01), Kozak
patent: 3007728 (1961-11-01), Hoffman
patent: 3282602 (1966-11-01), Willingshofer
patent: 3362735 (1968-01-01), Maxeiner
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