Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Sash balances – Spring
Patent
1994-04-20
1996-04-16
Rachuba, Maurina T.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Sash balances
Spring
16 31R, B60B 3300
Patent
active
055070698
ABSTRACT:
An articulated caster is described which provides a base having more than two casters attached thereto and disposed radially away from the approximate geometric center of the base. A pivot arm includes a pivot housing for receiving and maintaining a pivot ball therein. The pivot housing and pivot ball respectively each are provided with a pivot housing hole and a pivot ball hole which align together when the pivot ball is correctly disposed within the pivot housing. The pivot arm is pivotally attached to the base about a point that is disposed within the pivot ball by a shaft passing through the pivot ball hole, the pivot housing hole, and a pair of holes formed in opposing side walls of the base. According to a preferred modification, an angled slot is provided that is disposed in at least one side of the pivot housing having a width approximately equal to the diameter of the pivot ball hole. The angled slot is preferably disposed so that the bottom thereof is generally in closer proximity to a front of the base than is the top of the angled slot. The shaft passes through and cooperates with the angled slot so that the side to side pivotal motion of the pivot arm with respect to the front of the base is limited to the motion by the shaft within the area as defined by the angled slot.
REFERENCES:
patent: 1622447 (1927-03-01), Kalberer
patent: 2197273 (1940-04-01), Lindeman
patent: 2713179 (1955-07-01), Clifton
patent: 3433500 (1969-03-01), Christensen
Gurley Donald M.
Rachuba Maurina T.
Rinne, Jr. Risto A.
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