Dispenser for flowable material

Details Dispenser for flowable material Dispenser for flowable material

2007-12-04

2010-12-14

Ngo, Lien T (Department: 3754)

Dispensing

Plural sources, compartment, containers and/or spaced jacket

Three or more diverse sources

C604S227000, C222S467000, C366S076700

Reexamination Certificate

active

07850045

ABSTRACT:
A dispenser for flowable material includes a cylinder, a piston in and slidable along the cylinder for pressing and thus dispensing flowable material contained in the cylinder, and a shaft extending into the cylinder for sliding the piston. The shaft incorporates a thumb piece for engagement by the thumb of a user to drive the shaft in a forward direction into the cylinder for sliding the piston to dispense flowable material. The thumb piece is slidable along the shaft. A unidirectional clutch between the thumb piece and the shaft is operable in the forward direction to fix the thumb piece to the shaft such that the shaft may be driven forward by the thumb piece and is inoperable in an opposite, rearward, direction to release the thumb piece from the shaft such that the thumb piece can slide rearward along the shaft for operation at another position.

REFERENCES:
patent: 2632445 (1953-03-01), Kas, Sr.
patent: 3340872 (1967-09-01), Cox
patent: 3388941 (1968-06-01), Marcus
patent: 4263911 (1981-04-01), McCormack et al.
patent: 4925449 (1990-05-01), Saez et al.
patent: 5246011 (1993-09-01), Caillouette
patent: 5709320 (1998-01-01), Jimenez
patent: 6817749 (2004-11-01), Saunders et al.
patent: 7037094 (2006-05-01), Lee
patent: 2006/0249223 (2006-11-01), Leer et al.

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