Joints and connections – Articulated members – Pivoted
Patent
1989-09-11
1991-01-22
Cuomo, Peter M.
Joints and connections
Articulated members
Pivoted
403130, 403135, 192 215, F16C 1108, F16D 2702
Patent
active
049866893
ABSTRACT:
A ball joint including a socket defining a chamber and having an opening. The ball joint also includes a ball stud having a ball portion and a shank portion. The ball portion is located in the chamber of the socket. The shank portion of the ball stud projects through the opening in the socket. The chamber has a shape generally conforming to the shape of the ball portion of the ball stud. Electrorheological fluid is interposed between the ball portion of the ball stud and the socket for resisting relative movement between the ball stud and socket. The viscosity of the electrorheological fluid is variable as a function of the magnitude of an electric field applied thereto to vary the resistance to relative movement between the ball stud and the socket. The electric field applied to the electrorheological fluid is controlled to control the viscosity of the electrorheological fluid and thereby control the relative movement between the ball stud and the socket.
REFERENCES:
patent: 2665789 (1954-01-01), Ingersoll
patent: 2667237 (1954-01-01), Rabinow
patent: 2754946 (1956-07-01), Trickey
patent: 2809731 (1957-10-01), Rau
patent: 3041094 (1962-06-01), Herbenar
patent: 3240509 (1966-03-01), Pierce
patent: 3672476 (1972-06-01), Hendershot
patent: 4444298 (1984-04-01), Stangroom
patent: 4668417 (1987-05-01), Goossens et al.
patent: 4712940 (1987-12-01), Wood, Jr.
patent: 4772407 (1988-09-01), Carlson
Cuomo Peter M.
TRW Inc.
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