Joints and connections – Having a cam – wedge – or tapered portion
Patent
1990-10-09
1992-02-25
Kundrat, Andrew V.
Joints and connections
Having a cam, wedge, or tapered portion
403374, 361388, B25G 300
Patent
active
050908405
ABSTRACT:
A locking wedge apparatus for fastening a printed circuit board within an elongated slot in a rack. The apparatus comprises a first member having an elongated, flexible portion terminating in first and second apertured end portions, the elongated and apertured end portions forming a rectangularly shaped channel. A rectangularly shaped member having a plurality of ramps formed along the edges of one surface is positioned in a U-shaped member having a plurality of ramps extending from the bottom wall thereof such that the ramps on each member are in engagement. The assembled U-shaped and rectangularly shaped members are positioned in the channel formed in the first member. A screw member extends lengthwise through said first apertured end portion, through a threaded aperture in said rectangularly shaped member and into said second apertured end portion. Rotating the screw in a forward direction causes the rectangularly shaped member to move along the ramp surfaces of the U-shaped member in a manner such that the elongated flexible portion of said first member is deflected transversely to lock the printed circuit board in place. The apparatus is designed such that a user can specify a desired side load and the corresponding U-shaped/rectangularly shaped combination selected such that the ramp angle therein provides the desired side load.
REFERENCES:
patent: 4354770 (1982-10-01), Block
patent: 4775260 (1988-10-01), Keemer
patent: 4823951 (1989-04-01), Colomina
patent: 5036428 (1991-07-01), Brownhill
Keschner Irving
Kundrat Andrew V.
VSI Corporation
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