Apparatus for dispensing adhesive materials

Portable apparatus for dispensing adhesive materials comprising

• (a) a housing,
• (b) a fluid pump enclosed within said housing and including manual operating means for delivering fluid under pressure from a reservoir,
• (c) a hydraulic cylinder having a first end supported on said housing and a second end extending therefrom, said hydraulic cylinder including a piston displaceable axially of said cylinder and a piston rod coupled to said piston and extending from said first end of said cylinder,
• (d) means coupling said fluid pump to said hydraulic cylinder to supply fluid to one side of said piston upon manual operation of said pump to displace said piston and reciprocate said piston rod,
• (e) support means detachably supporting a plurality of elongated cylindrical cartridges containing adhesive materials, said cartridges each having a discharge end and an operating end with a displaceable end wall to which force is applied to discharge the contents of said cartridge, said support means including means on said housing for supporting said operating ends and means on said second end of said hydraulic cylinder for supporting said discharge ends of said cartridges,
• (f) a pair of drive rods mounted for reciprocating movement in said housing and being disposed in parallel spaced relation to said piston rod,
• (g) means drivingly coupling said piston rod to said drive rods so that displacement of said piston by pumped fluid causes said drive rods to displace said end walls and discharge adhesive materials from said cartridges.

Apparatus for dispensing adhesive materials from a pair of disposable cartridges of the type each having a cylindrical housing with a restricted discharge opening at one end and a movable wall at the other end comprising

• (a) a frame including support means for releasably supporting the pair of said disposable adhesive cartridges,
• (b) at least one hydraulic cylinder mounted on said frame and extending parallel to and coextensive with said cartridge when mounted in said support means, said hydraulic cylinder including a power piston mounted for axial movement within a cylindrical housing, a piston rod supporting said power piston on one end with a second end extending outwardly of said cylindrical housing,
• (c) a pair of plungers each including a drive head and a support rod, said support rods being mounted on said frame for axial movement, said plungers being aligned with said adhesive cartridges supported on said frame to provide engagement between said drive heads and said movable walls and to provide displacement of said walls to discharge simultaneously the contents of said cartridges through said discharge openings, means coupling said support rods to said piston rod to cause said drive heads and power piston to move together,
• (d) a hand operated pump including a fluid reservoir supported by said frame, said pump including a manually displaceable piston for delivering fluid from said reservoir to said hydraulic cylinder under pressure to displace said power piston and said plungers in a direction to discharge the contents of said cartridges simultaneously,
• (e) a fluid bypass communicating between said hydraulic cylinder and said reservoir to return fluid directly to said reservoir bypassing said pump, said fluid bypass including a manually operable valve movable between open and closed positions.

Apparatus for dispensing an adhesive material from a cartridge of the type having a cylindrical housing with a restricted discharge opening at one end and a movable wall at the other end comprising

• (a) a frame including support means for one said adhesive cartridges,
• (b) a hydraulic cylinder mounted on said frame and extending parallel to and coextensive with said cartridge when mounted in said support means, said hydraulic cylinder including a power piston mounted for axial movement within a cylindrical housing, a piston rod supporting said power piston on one end with a second end extending outwardly of said cylindrical housing,
• (c) a plunger including a circular drive head and a support rod, said support rod being mounted on said frame for axial movement parallel to said piston rod, said plunger being aligned with said adhesive cartridge supported on said frame to provide engagement between said drive head and said movable wall and to provide displacement of said wall to discharge the contents of said cartridge through said discharge opening, means coupling said support rod to said piston rod to cause said drive heads and power piston to move together,
• (d) a hand operated pump including a fluid reservoir supported by said frame, said pump including a manually displaceable piston for delivering fluid from said reservoir to said hydraulic cylinder under pressure to displace said power piston and said plungers in a direction to discharge the contents of said cartridge,
• (e) a fluid bypass communicating between said hydraulic cylinder and said reservoir to return fluid directly to said reservoir bypassing said pump, said fluid bypass including a manually operable valve movable between open and closed positions, said pump including a pump chamber and a pump piston mounted for reciprocation within said chamber for drawing fluid from said reservoir and delivering it under pressure to said hydraulic cylinder, conduit means extending between said reservoir and said pump chamber and between said hydraulic cylinder and said pump chamber, check valves in said conduit means restricting fluid flow in the direction from said hydraulic cylinder to said reservoir, said conduit means extending between said hydraulic cylinder and said pump chamber connects to a first end of said hydraulic cylinder, and a fluid conduit connecting the other end of said hydraulic cylinder to said reservoir.

Apparatus for dispensing and mixing adhesive material from a pair of cartridge type containers each one having a cylindrical housing with a fixed end wall with a restricted discharge opening at one end and a displaceable circular wall at the other end movable toward the fixed end wall to discharge its contents, the combination comprising

• a frame for supporting said cartridges in parallel adjacent positions,
• a mixing nozzle supported on said frame and positioned to receive adhesive materials from said discharge opening in both of said cartridges and to mix said adhesive materials and discharge the adhesive mixture from said nozzle,
• a hydraulic cylinder mounted on said frame parallel to and coextensive with said cartridges, said hydraulic cylinder including a first piston displaceable therein and a piston rod secured to said first piston and coaxial with said hydraulic cylinder, drive rods mounted in said frame for axial movement parallel to said piston rod, said drive rods having first and second ends, said first end of each being coupled to one of said displaceable walls,
• a yoke coupling said piston rod and said second ends of said drive rods for coordinated movement to discharge said adhesive materials from said cartridges,
• a manually operated pump for pumping fluid from one end of said hydraulic cylinder to the other end to displace said first piston and piston rod to dispense adhesive materials from said cartridges,
• and selectively operable fluid bypass conduit means to bypass said pump and circulate fluid from said other end of said hydraulic cylinder to said one end of said hydraulic cylinder during manual displacement of said piston rod and said drive rods without use of said pump.