Device for advancing and retracting writing element in writing i

Details Device for advancing and retracting writing element in writing i Device for advancing and retracting writing element in writing i

1990-04-17

1991-04-02

Johnson, Richard J.

Coating implements with material supply

Projectable and retractable tool

Including retraction spring and projected-position retainer

B43K 2408

Patent

active

050043641

ABSTRACT:
A device for advancing and retracting a writing element in a writing instrument, of the type comprising a cylinder, a stationary cam provided on an inner surface of the cylinder, a rotary cam follower disposed inside the stationary cam to be rotatable and slidable axially of the cylinder, the rotary cam follower being in abutting engagement at a front end thereof with the writing element, and a knocking rod disposed in the cylinder and having a front cam portion. When the knocking rod is pushed forward, the knocking rod, the stationary cam and the rotary cam follower cooperate to advance the writing element and maintain the same in an advanced position and to allow the writing element to retract to a retracted position. The knocking rod has projections which are in slidable engagement with slots formed axially through the cylinder. The knocking rod has slots to make it resilient. The knocking rod is inserted into the cylinder through the rear opening of the cylinder until the projections snappingly engage the slots. The capability of inserting the knocking rod from the rear side makes the assembly easy and simple.

REFERENCES:
patent: 3137276 (1964-06-01), Weisser
patent: 3179087 (1965-04-01), Kahn
patent: 3196839 (1965-07-01), Bertoglio
patent: 3724961 (1973-04-01), Levoin
patent: 3810701 (1974-05-01), Freccero

Affiliated with

Also associated with

Rating

Device for advancing and retracting writing element in writing i does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for advancing and retracting writing element in writing i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for advancing and retracting writing element in writing i will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-324638