US 4,083,474 AGranted

Applicator gun for multi-component resin systems

AssigneeWeyerhaeuser Company

InventorsMearle J. Waite, Frank Wislocker

Life of this patent

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Abstract

An easily cleaned trigger-actuated gun of simplified construction for applying a multi-component resinous patching or adhesive compound system to a workpiece is described. An internal valve positioner, connected to the trigger mechanism by means of an operating rod, regulates flow of compound from the gun, between zero, intermediate or full flow rates in response to trigger position, by adjusting clearances between simple flow checking ball elements and their valve seats at each component inlet into the gun. The metered components flow through a static mixer tube, onto the workpiece. A dripless feature is provided by the addition of a cylinder component that remains present in the valve chamber of the gun during operation but withdraws from the chamber after compound flow from the gun is halted, in response to the same release of trigger that shuts off component flow, causing a slight vacuum in the gun sufficient to pull back into the discharge end of the gun the last drop of adhesive not adhering to the workpiece.

Claims6

Dependent claims

An applicator gun for supplying a multi-component compound to a workpiece, comprising;

a body, enclosing a metering chamber, apertured to provide inlets into said chamber for each component of the multi-component compound;
valve means in each inlet for regulating flow of each component into said chamber, each valve having a flow control element, accessible from inside said chamber;
a valve positioner in contact simultaneously with all flow control elements, having contact surfaces such that movement of said positioner axially with respect to the gun body permits the flow control elements to move from substantially zero flow to full flow positions;
an operating rod means for allowing external adjustment of said valve positioner, connected to said valve positioner, extending from said metering chamber, slidably mounted in the gun body and free to move axially with respect to the gun body;
and
a trigger means mounted on said body and linked to said operating rod means such that full movement of said trigger operates to move said valve positioner between zero flow and full flow positions.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/779,448Filed 21 Mar 1977
Granted: 11 Apr 1978
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B29B 7/7438
Using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant: mixing guns, i.e. hand-held mixing units having dispensing means
B05B 7/1209
Designed to control volume of flow, e.g. with adjustable passages: the controlling means for each liquid or other fluent material being manual and…
B05B 15/50
Details of spraying plant or spraying apparatus not otherwise provided for; Accessories: arrangements for cleaning; Arrangements for preventing…
B05C 17/00553
For discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using…