Browse Prior Art Database

COUNTERBALANCE MECHANISM

IP.com Disclosure Number: IPCOM000023880D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 359K

Publishing Venue

Xerox Disclosure Journal

Abstract

A counterbalance mechanism for a pivoting body such as a coving machine platen cover which is adapted to be pivoted in any position up to 80 to the plane of the platen and remain stationary at that position is disclosed0

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 71% of the total text.

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XEROX DISCLOSURE JOURNAL

COUNTERBALANCE MECHANISM ~A
UProposed0McMillen Classification

0S~ CL 74/603

mt 0 CL F16h 57/02

A counterbalance mechanism for a pivoting body such as a coving machine platen cover which is adapted to be pivoted in any position up to 80 to the plane of the platen and remain stationary at that position is disclosed

0

9

F/Gd

7

5FIG. 2

Volume 4 Number 2 March/April 1979 135

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COUNTERBALANCE MECHANISM (ConVd)

The mechanism is mounted on a shaft 1 fixed to machine support structure M

                                                  0 The body B to be pivoted is attached to a plate 2 which is rotatably supported on the shaft 1 by way of bearing 3 but held against axial movement in one direction by a retaining ring 4 and a high axial force in the other direction

                                   0 This axial force is transmitted through balls 5 which roll in circular grooves 6 of varying depth formed on the face of the plate 2~ The balls 5 are trapped between the plate 2 and a plate 7 which has similar grooves~ A spring 8 is held in compression between the plate 7 and a collar 9 secured to the shaft and provides the axial force for the plate 2~ A suitable key 10 holds plate 7 against rotation but allows slight axial movement on the shaft 10

In operation, when the body B is in a position requiring little or no counter balance torque as shown in Figure 1 the balls 5 will be in the deepest parts of the grooves 6 in the plates 2 and 7~ This will result in the plates b...