Normally-closed nozzle tip trimmer

Details Normally-closed nozzle tip trimmer Normally-closed nozzle tip trimmer

1996-10-31

1999-01-19

Kashnikow, Andres

Dispensing

With cutter and/or punch

To form dispensing opening in container

222 82, 222326, 83580, 30226, 30233, 30261, B67D 500, B26D 508, B26D 1300

Patent

active

058605681

ABSTRACT:
A dispensing apparatus, such as a caulking gun, includes an elongated handle having a U-shape cross section to define an internal space. A support member is mounted on the handle configured for receiving a dispensing cartridge having a nozzle at one end and being sealed at the other end by a slidable diaphragm or seal. A plunger rod and piston assembly is mounted on the handle for operatively engaging the cartridge diaphragm to dispense compounds or viscous mediums from the open nozzle of the cartridge. A trigger is pivotally attached to the handle for incrementally advancing the plunger assembly as the trigger is pulled from an extended position most remote from the handle to a retract position most proximate to the handle. A spring normally urges the trigger to move to the extended position. An aperture is provided in the handle for receiving at least a portion of a nozzle of a dispensing cartridge. A protective cover plate is responsive to the movements of the trigger for normally and automatically blocking the aperture in the handle and to filly open the aperture only when the trigger is moved to a selected intermediate retracted position. A cutter is provided within the space of the handle also responsive to movements of the trigger for snipping or trimming the nozzle of a dispensing cartridge after it has been inserted through the aperture, and the trigger is further retracted beyond the intermediate position to a more proximate position in the handle. In this way, at least a portion of a nozzle of a dispensing cartridge can be inserted through the aperture, the protective cover normally preventing any object, but particularly a finger, from passing through the aperture.

REFERENCES:
patent: 3089241 (1963-05-01), Batdorf
patent: 3105614 (1963-10-01), Sherbondy
patent: 3189226 (1965-06-01), Sherbondy
patent: 4135644 (1979-01-01), Pacetti
patent: 4158914 (1979-06-01), Kurtz
patent: 4271593 (1981-06-01), Smith
patent: 4390115 (1983-06-01), Bigham
patent: 4493437 (1985-01-01), Breeden
patent: 4802607 (1989-02-01), Johnson
patent: 5079838 (1992-01-01), Stallings, Jr.

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