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US 6,783,292 B2Granted
Double-chuck mechanical pencil
AssigneeKotobuki & Co., Ltd.
InventorsSachio Arai, Tadao Odaka
Life of this patent
Estimating the term…
Abstract
A double-chuck mechanical pencil comprises a barrel, a barrel cap detachably attached to a front end of the barrel, a lead tank inserted in the barrel, a feed chuck for feeding leads, combined with the lead tank, a sleeve bolster disposed on the front side of the feed chuck, and a holding chuck combined with the sleeve bolster. A holding chuck unit including the holding chuck and the sleeve bolster, and a feed chuck unit including the feed chuck and a sleeve can come into contact with each other in the barrel cap.
Claims1
A double-chuck mechanical pencil comprising:
- a barrel;
- a barrel cap detachably screwed on a front end of the barrel;
- a lead tank inserted in the barrel so as to be operated for longitudinal sliding in the barrel;
- a feed chuck fixed to a front end of the lead tank;
- a chuck ring loosely put on the feed chuck;
- a sleeve interposed between the barrel cap and the feed chuck;
- a sleeve bolster in contact with a front end of the sleeve;
- a holding chuck fixed to a front end of the sleeve;
- a return spring interposed between the sleeve and the lead tank;
- a tip spring interposed between the barrel cap and the sleeve;
- and
- an intermediate connecting member having a front externally threaded part screwed in an internally threaded part of the barrel cap, and a back externally threaded part screwed in a front internally threaded part of the barrel.
9 more elements
Dependencies are inferred from the claim text.