Column unit

Details Column unit Column unit

1990-09-14

1992-06-09

Friedman, Carl D.

Supports

Stand

Standard type

384609, 384617, 297345, F16M 1100

Patent

active

051200112

ABSTRACT:
According to an illustrative example, a chair column comprises a stand tube. A gas spring is inserted in the stand tube with the piston rod thereof directed downwardly toward an abutment wall of the stand tube. The lower end of the piston rod is connected to the abutment wall and is rotatably supported on the abutment wall by a ball bearing. The ball bearing comprises two bearing discs and a plurality of balls therebetween. The bearing discs and the balls are pre-assembled by a cage. The bearing can be pre-assembled before it is combined with the lower end of the piston rod and is mounted thereafter on the lower end of the piston rod. The cage remains within the chair column when the gas spring is inserted subsequently into the stand tube together with the bearing.

REFERENCES:
patent: 594261 (1897-11-01), Meltzer
patent: 642615 (1900-02-01), Kragh
patent: 676939 (1901-06-01), Eveland
patent: 1791828 (1931-02-01), Mizer
patent: 4336972 (1982-06-01), Dagiel
patent: 4627602 (1986-12-01), Sporck
patent: 4693442 (1989-09-01), Sills
patent: 4940202 (1990-07-01), Hosan et al.

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