Lead forwarding mechanism retainer for thurst action mechanical pencil
US4969763A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1988 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | May 17, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K21/16
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A thrust-action mechanical pencil having a lead-forwarding mechanism and an outer sleeve, the lead-forwarding mechanism being inserted from the rear end of the outer sleeve. An elastic member to prevent looseness is inserted between a chuck ring sleeve, and an inner ring provided on the inside of the outer sleeve to prevent forward movement. A tubular retaining sleeve having a full length slit is installed between a mouth piece and a stepped portion of the lead forewarding mechanism. A retaining portion on the forward end of the retaining sleeve is set between the mouth piece and the forward end of the outer sleeve to retain the lead-forwarding mechanism in the pencil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.