Push-button type mechanical pencil

Details Push-button type mechanical pencil Push-button type mechanical pencil

1986-05-06

1988-01-19

Reese, Randolph A.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including holder

401 65, 401 67, B43K 2122

Patent

active

047202033

ABSTRACT:
A push-button type mechanical pencil consisting of a barrel which is composed of a clip-carrying upper barrel member and a metal tip-carrying lower barrel member, which barrel members are engaged with each other at a substantially intermediate portion of the barrel and joined to each other by a rotary unit structure so that the barrel members can be turned with respect to each other, a movable cylinder provided in the unit structure and adapted to be moved forward and backward in the axial direction owing to a screw pair, and a lead-extruding structure provided in the barrel and capable of projecting a lead in a stepped member by a very small length at a time by pressing the upper end of a push-down tube, which lead-extruding structure includes a push-button member projecting from the rear end of the barrel, a protective pipe provided in a bore at the free end of a metal tip provided at the lower portion of the lead-extending structure, and an outer tube fixed to the movable cylinder in the unit structure to operatively connect them to each other, the protective pipe in the lead-extruding structure being projected by an arbitrary length from the free end of the metal tip by turning either of the two barrel members.

REFERENCES:
patent: 4218153 (1980-08-01), Hashimoto
patent: 4269524 (1981-05-01), Hashimoto et al.
patent: 4544295 (1985-10-01), Hashimoto et al.

Affiliated with

Also associated with

Rating

Push-button type mechanical pencil does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Push-button type mechanical pencil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Push-button type mechanical pencil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-369855