Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Hinge – Including means to hold or retard hinged members against...
Patent
1990-01-30
1992-02-18
Spruill, Robert L.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Hinge
Including means to hold or retard hinged members against...
16337, E05C 1764, E05D 1108
Patent
active
050881566
ABSTRACT:
A shaft lock device includes a cylindrical rotational shaft, and first and second members. The first member supports one end of the rotational shaft so that the shaft is rotatable around the axis thereof, and the second member is fixed to the other end portion of the shaft and rotatable integrally with the shaft. A coil spring, coiled in a predetermined direction and having a coil diameter greater than the inner diameter of the shaft, is arranged in the shaft along the axial direction while the outer surface of the spring is pressed against the inner circumferential surface of the shaft when the second member is rotated in the direction opposite the coiling direction, the spring is urged to expand in its radial direction, thereby retaining the shaft from rotating. When the second member is rotated in the coiling direction, the spring is urged to contract in its radial direction, thereby allowing the shaft to rotate.
REFERENCES:
patent: 3064766 (1962-11-01), Hanizeski
patent: 4781422 (1988-11-01), Kimble
patent: 4864523 (1989-09-01), Sasaki
Cuda Carmine
Kabushiki Kaisha Toshiba
Spruill Robert L.
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