Browse Prior Art Database

Cover Counterbalance and Latching Mechanism

IP.com Disclosure Number: IPCOM000084101D
Original Publication Date: 1975-Sep-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Brearley, FW: AUTHOR [+3]

Abstract

Described is a counterbalance and latching mechanism suitable for use on a machine cover. The device is illustrated in three figures. Fig. 1 shows the cover hinge and the counterbalance and latching mechanism in the open position. Fig. 2 shows the same structure in an intermediate position, and Fig. 3 illustrates the same mechanism in closed position.

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Cover Counterbalance and Latching Mechanism

Described is a counterbalance and latching mechanism suitable for use on a machine cover. The device is illustrated in three figures. Fig. 1 shows the cover hinge and the counterbalance and latching mechanism in the open position. Fig. 2 shows the same structure in an intermediate position, and Fig. 3 illustrates the same mechanism in closed position.

The cover hinge is attached via a hinge pivot to the machine frame and supports a cam follower, freely rotatable on a follower shaft connected directly to the cover hinge. An elastic cam member is mounted on the machine frame in a side-by-side relationship with the cover hinge in position, so as to interact with the cam follower mounted on the follower shaft on the cover hinge.

In the open position, the cam follower coacts with an open position latch ramp detenting the cover in the open position. This view is illustrated in Fig. 1. In Fig. 3, the closed position latch ramp coacts with the cam follower detenting the cover hinge and the attached cover in the closed position.

In the intermediate positions between those illustrated in Fig. 1 and Fig. 3, the cam follower interacts with the elastic cam which, due to the distribution of forces, counterbalances the cover weight. The cam contour is designed to provide counterbalancing torque in proportion to the cover weight torque at any point in its travel. The viscous characteristics of the elastic cam also provides damping of t...