US 6,581,805 B2Granted

Viscous fluid compound applicator

AssigneeJohn S. Conboy

InventorsJohn S. Conboy, Matt Jungklaus

Life of this patent

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Abstract

A viscous applicator having a chamber for holding viscous fluid such as dry wall compound. A one-way filling valve and a discharge nozzle are located on the chamber. The nozzle is opened and closed using a pull rod connected to a seal on one end. The second end is controlled by a rotatable handle on the applicator main housing. A gas spring is located in the housing and retracts during loading of dry wall compound into the chamber and discharges compound when the discharge nozzle is opened by the pull rod. The handle is spring loaded to close the nozzle when released. A hollow push rod connects the gas spring to a dispensing head in the chamber and the pull rod is movable through the push rod and the dispensing head. A series of cam slots and followers controls motions of the handle and the pull rod.

Claims13

Dependent claims

A viscous fluid applicator comprising:

a) a chamber for holding a supply of viscous fluid,
b) an applicator head on a first end of said chamber, said applicator head having a discharge nozzle,
c) a dispensing head movable through said chamber for discharging viscous fluid from said nozzle,
d) a main housing extending from a second end of said chamber, said main housing including a gas spring operator operatively connected to said dispensing head for moving said dispensing head through said chamber, said gas spring having loading and discharge modes,
e) a loading mechanism for admitting viscous fluid into said chamber when said gas spring is in loading mode, and
f) a discharge control mechanism operatively associated with the main housing for closing off said discharge nozzle when said gas spring is in loading mode and for opening said discharge nozzle when said gas spring is in discharge mode.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/981,450Filed 17 Oct 2001
Published: US 2003/0072830 A117 Apr 2003
Granted: 24 Jun 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B05C 17/015
For discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using…
E04F 21/00
Implements for finishing work on buildings
E04F 21/165
Implements for finishing work on buildings: for finishing joints, e.g. implements for raking or filling joints, jointers
B05C 17/0136
With manually mechanically or electrically actuated piston or the like: comprising an energy storing element, e.g. a spring, for exerting, e.g.…