Epoxy ejection gun
AssigneeQuikpoint, Inc.
InventorsAlan B. Aronie, Joel Aronie
Life of this patent
Estimating the term…
Abstract
In the epoxy ejection gun disclosed herein, a bridge member which couples and drives a pair of push rods includes a forward facing seat or socket, e.g. of conical shape. A lead nut engageable with a rotatable lead screw is provided with a surface matching the seat. An adjustable spring is provided for biasing the interfitting parts. Rotation of the lead screw causes the lead nut to advance driving the push rods but pressure is controlled by the selected value of biasing force on the matching surfaces, excessive force allowing the lead nut to rotate with the lead screw rather than to advance.
Claims11
Apparatus for simultaneously ejecting a pair of mixture components from respective dispensing tubes, the tubes being provided with respective plungers, said apparatus comprising:
- frame means for holding a pair of dispensing tubes in side by side relationship;
- a pair of parallel push rods axially slidable in said frame means and having distal portions adapted for driving the plungers of dispensing tubes held in said frame;
- between said push rods and parallel thereto, a lead screw journaled in said frame;
- bridge means linking the proximal ends of said push rods and providing, between the push rods, a forward facing slip clutch seat;
- means for rotating said lead screw;
- nut means for engaging said lead screw, said nut means having a rearward facing slip clutch surface adapted to frictionally engage said seat;
- and spring means for applying a biasing force pushing said slip clutch surface against said seat whereby rotation of said lead screw will advance said nut means with said bridge means and push rods to apply a pressure to said plungers which is controlled by the amount of said biasing force, any excessive force being operative to unload said slip clutch surface and to allow said nut means to rotate with said lead screw.
Apparatus for simultaneously ejecting a pair of mixture components from respective dispensing tubes, the tubes being provided with respective plungers, said apparatus comprising:
- frame means for holding a pair of dispensing tubes in side by side relationship
- a pair of parallel push rods axially slidable in said frame means and having distal portions adapted for driving the plungers of dispensing tubes held in said frame;
- between said push rods and parallel thereto, a lead screw journaled in said frame;
- bridge means linking the proximal ends of said push rods and providing, between the push rods, a forward expanding seat which surrounds said lead screw;
- reduction gear means for rotating said lead screw;
- nut means for engaging said lead screw, said nut means having a matching surface adapted to frictionally engage said seat;
- and spring means for applying a biasing force pushing said matching surface into said seat whereby rotation of said lead screw will advance said nut means with said bridge means and push rods to apply a pressure to said plungers which is controlled by the amount of said biasing force, any excessive force being operative to unload said matching surface and to allow said nut means to rotate with said lead screw.
Apparatus for simultaneously ejecting a pair of mixture components from respective dispensing tubes, the tubes being provided with respective plungers, said apparatus comprising:
- frame means for holding a pair of dispensing tubes in side by side relationship;
- a pair of parallel push rods axially slidable in said frame means and having distal portions adapted for driving the plungers of dispensing tubes held in said frame
- between said push rods and parallel thereto, a lead screw journaled in said frame;
- bridge means linking the proximal ends of said push rods and providing, between the push rods, a forward expanding conical seat which surrounds said lead screw;
- reduction gear means drivable from an electric motor for rotating said lead screw;
- nut means for engaging said lead screw, said nut means having a tapered conical surface adapted to frictionally engage said seat;
- and
- a coil spring surrounding said lead screw for applying a biasing force pushing said conical surface into said seat;
- an annular bushing surrounding said lead screw and threaded into said bridge member for adjusting the compression of said coil spring whereby rotation of said lead screw will advance said nut means with said bridge means and push rods to apply a pressure to said plungers which is controlled by the compression of said coil spring, any excessive force being operative to unload said conical surface and to allow said nut means to rotate with said lead screw.
Dependencies are inferred from the claim text.