Woodworking – Workbench
Patent
1987-11-03
1988-11-15
Bray, W. Donald
Woodworking
Workbench
108 553, 193 35MD, B25N 100, B65G 1300
Patent
active
047841940
ABSTRACT:
A worktable providing rolling support for workpieces thereon has a multiplicity of spaced, generally circular passages extending therethrough with at least one outwardly extending channel. Removably seated in the passages are ball insert units rotatably supporting a ball therewithin and having a locking element projecting laterally outwardly therefrom adjacent the lower end and resiliently bearing against a surface of the table member to secure the ball insert unit in firm assembly therewith. The projecting locking element may be rotated into alignment with the channel of the passage to effect release of the ball insert unit from the table member, and for movement upwardly and downwardly in the passage. The biasing action can be effected by resilient deflectability of the portion of the table member against which the locking element bears, by use of separate spring elements, by forming the locking element from a resiliently deflectable material, and by use of other components which will provide the resilient deflectability to permit rotation of the locking element into a locking position or into alignment with the vertical channel of the passage.
REFERENCES:
patent: 2931477 (1960-04-01), Metzgar
patent: 3020993 (1962-02-01), Heinrich
patent: 3739894 (1973-06-01), Hinman
patent: 4347794 (1982-09-01), Nordstrom
Bray W. Donald
Trumpf GmbH & Co.
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