Abstract: A dispensing system includes a mobile dispensing device, a fluid transport device, and a fluid supply module. The mobile dispensing device includes a dispensing mechanism carried by a first frame including a first track portion. The fluid transport device includes a second frame supported by at least one wheel for rolling movement of the second frame on the substrate, with the second frame including a second track portion. The fluid supply module includes a base member and at least one reservoir carried by the base member and connectable with the dispensing mechanism for dispensing a fluid stored in the at least one reservoir. The base member includes a third track portion selectively engageable with either one of the first and second track portions for releasable assembly of the fluid supply module with the corresponding one of the mobile dispensing device and the fluid transport device.

Abstract: In a method of repairing a blistered portion of a thermosoftening membrane, a heated air dispensing device is provided, having an elongated nozzle including at least one outlet aperture. The blistered portion of the thermosoftening membrane is pierced to form an opening sized to receive the elongated nozzle. The elongated nozzle is inserted through the opening and into an interior cavity of the blistered portion, with the interior cavity being at least partially defined by a thermosoftening material. The heated air dispensing device is operated to dispense heated air through the at least one outlet aperture into the interior cavity of the blistered portion to at least partially melt the thermosoftening material. A force is applied to an exterior surface of the blistered portion to flatten the blistered portion, thereby substantially eliminating the interior cavity.

Abstract: A dispensing system includes a mobile dispensing device, a fluid transport device, and a fluid supply module. The mobile dispensing device includes a dispensing mechanism carried by a first frame including a first track portion. The fluid transport device includes a second frame supported by at least one wheel for rolling movement of the second frame on the substrate, with the second frame including a second track portion. The fluid supply module includes a base member and at least one reservoir carried by the base member and connectable with the dispensing mechanism for dispensing a fluid stored in the at least one reservoir. The base member includes a third track portion selectively engageable with either one of the first and second track portions for releasable assembly of the fluid supply module with the corresponding one of the mobile dispensing device and the fluid transport device.

Abstract: A hand-held dispensing device for dispensing small shots of a semi-solid material from a remote supply of such material which is connected to the device. A housing is formed with upper and lower pressure chambers. An upper piston is reciprocally movable within the housing for moving a connected dispensing tube between open and closed positions with a material outlet opening in a lower end of the device. A lower piston is reciprocally movable within the housing for moving a hollow stem of the piston within an annular dispense chamber located about a closed end of the dispensing tube. Downward movement of the lower piston stem in coordination with upward movement of the upper piston opens and closes a material outlet port formed in the dispensing tube to block further flow of material into the dispense chamber generally simultaneously with the forced discharge of the material from the dispense chamber by a lower end of the lower piston stem.

Abstract: A positive displacement material mixing, metering and dispensing device having a housing with a pair of material inlet ports, and a pair of material outlet ports which are in communication with a pair of holding cavities, and a pair of valve chambers. A spool is slidably mounted in each of said valve chambers. An air actuated piston is in contact with opposite ends of the spools. Each spool has a reduced diameter central portion which communicates with a respective one of the material holding cavities at all times, but is in communication with the inlet and outlet ports only at discrete positions in the operating cycle and is never in communication with both the inlet and outlet ports simultaneously. One end of a pair of push rods moves into and out of the material holding cavities, with the other ends of the push rods being simultaneously actuated by an air piston.

Abstract: A gun for metering, mixing and dispensing the components of a two-component liquid material. A pair of chambers each having front and rear compartments, communicate with the liquid materials contained in pressurized portable cartridges through liquid material inlet openings formed in the rear compartment of the chambers. A material passage opening allows for communication between the front and rear compartments of the chamber, and an aligned material outlet opening formed in the front compartment allows for passage of the material out of the gun. A pair of independently adjustable rods are slidably mounted in the rear compartment of their respective chambers. Pump means drive the rods between a positive displacement position wherein front ends of the rods are sealingly engaged with the material passage openings and extend into the front compartments of the chambers, and a retracted position wherein the front and rear compartments are allowed to communicate through the material passage opening.