Browse Prior Art Database

Cover Anti-Sag Device

IP.com Disclosure Number: IPCOM000111961D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Mroz, SP: AUTHOR [+2]

Abstract

A device which supports a cover/door in shock and vibration environments and automatically adjusts for normal tolerance differences between a cover and its mating surface/frame is disclosed. This device adjusts vertically while closing the cover and yet provides vertical motion restraint once the cover is closed. As shown in the Figure, the cover (9) has a means (8) of supporting a square pin (4). The pin is set to match the angle of the finger (1) and its slot (2). The frame (5) has an angled slope (6) upon which the finger slides during cover closing. The end of the finger is shaped (3) to allow the force vector during cover closure to align along the slot (2). This allows the finger (1) to slide relative to the pin (4), and rise vertically.

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Cover Anti-Sag Device

      A device which supports a cover/door in shock and vibration
environments and automatically adjusts for normal tolerance
differences between a cover and its mating surface/frame is
disclosed.  This device adjusts vertically while closing the cover
and yet provides vertical motion restraint once the cover is closed.
As shown in the Figure, the cover (9) has a means (8) of supporting a
square pin (4).  The pin is set to match the angle of the finger (1)
and its slot (2).  The frame (5) has an angled slope (6) upon which
the finger slides during cover closing.  The end of the finger is
shaped (3) to allow the force vector during cover closure to align
along the slot (2).  This allows the finger (1) to slide relative to
the pin (4), and rise vertically.  Once the cover is closed, and the
finger is resting on the horizontal part of the frame (7), the load
vector on the finger is vertical.  This vertical load causes binding
between the finger slot (2) and the pin (4) as long as the angle
between the slot and the horizontal is less than the arc-tangent of
the coefficient of friction between the two parts.  During shock
loading the binding prevents the cover (9) from moving vertically
relative to the frame (5).