Mechanical pencil

Details Mechanical pencil Mechanical pencil

1977-07-06

1979-08-28

Crowder, Clifford D.

Coating implements with material supply

Plural tools including projectable and retractable tool

Including individual actuators

401 67, B43K 2700

Patent

active

041659414

ABSTRACT:
A writing instrument includes a holding outer tube to be held by the user and a lead rod holding means, said lead rod holding means being provided in said holding outer tube and movable relative to said outer tube. The writing instrument has a lead rod feeding means; an engaging member for holding said lead rod holding mechanism at a position where a lead rod guiding pipe engages with an engaging surface formed on said holding outer tube when said lead rod guiding pipe advances to a position projected from said holding outer tube by pressing said lead rod holding means; and a push button provided for pushing said engaging member to release the engagement with said surface.

REFERENCES:
patent: 268355 (1882-11-01), Boman
patent: 1549264 (1925-08-01), Nealon
patent: 1585843 (1926-05-01), Fitch
patent: 3604816 (1971-09-01), Levoin
patent: 3724960 (1973-04-01), Hashimoto et al.
patent: 3765781 (1973-10-01), Hashimoto et al.
patent: 3814524 (1974-06-01), Sperti
patent: 3865496 (1975-02-01), Robbins
patent: 3914059 (1975-10-01), Mitsuya

Affiliated with

Also associated with

Rating

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 Mechanical pencil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanical pencil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-766445