Dispensing – With discharge assistant – Container with follower
Reexamination Certificate
2003-03-19
2004-11-16
Jacyna, J. Casimer (Department: 3751)
Dispensing
With discharge assistant
Container with follower
C222S323000, C222S326000, C222S333000, C222S309000, C222S391000
Reexamination Certificate
active
06817492
ABSTRACT:
FIELD OF THE INVENTION
The disclosed device relates to cartridge discharged material. More particularly the disclosed device relates the dispensing of prepackaged material from cartridges through a controlled volume orifice. The disclosed device provides for the controlled placement of material from the cartridge by means of rotating a hand knob attached to a threaded rod assembly designed to thereby translate a plunger within a piston-like sleeve in the flanged dispenser, forcing the material out the controlled volume orifice.
A conventional device used for this application is the caulking gun with its pistol type squeeze grip used to dispense caulk or similar materials. With this type of application a cylindrical tube is inserted into the dispensing apparatus that restricts the cylinder from the front adjacent to the dispensing nozzle. Pressure is exerted on an internal piston-like sleeve by squeezing a pistol grip actuating a rod and plunger by a ratcheting means to dispense a prepackaged substance.
Another and equally effective method of similarly extruding a prepackaged substance in a flanged dispenser through a controlled volume orifice is accomplished by squeezing a pistol grip mechanism, actuating a rod and plunger with a ratcheting mechanism, pressing an internal piston like sleeve and forcing the material out the controlled volume orifice. The method of restraining this type of cylindrical container for dispensing the material is by the means of a top and bottom flange at the rear of the container.
BACKGROUND OF THE INVENTION
Licensed pest control operators have found in dispensing insecticide in commercial establishments and private residences that it is extremely difficult to deposit the desired amount of insecticide in exactly the proper locations. This is especially true when the access to those locations is tight or is obstructed by furniture, appliances, or other difficult to move objects. Commercial gel type insecticides are most commonly dispensed by the means of a cylindrical container with opposing flanges at rear to be attached to a conventional dispensing gun. This form of container is often used in the field of pest control to dispense insecticides in cracks and crevices, the need for which is often in hard to reach areas behind appliances in commercial establishments as well as residences. There are precise amounts and locations that the appropriate insecticide can legally be deposited depending on the material applied and the location.
Commercially available dispensing devices for substances in this style of container feature a pistol grip mechanism that restrains the cylindrical tube type container of insecticide gel by an upper and lower flange attachment. Such devices function much the same as a caulking gun where a trigger is activated by the user's fingers which in turn imparts pressure to the rear of the container to force gel from the front of the container. Such commercially available dispensers, however, are of limited use when trying to reach difficult areas other than moving the appliances out of the way. Too often these appliances are connected to electrical, water or sewer lines that make the job extremely difficult. Other problems arise when the area cannot be seen adequately to know if the gel or other material is being placed properly. Still another problem arises when the handle of a conventional applicator gun is squeezed and the material continues to run out the dispensing orifice after the squeezing has stopped due to the ratcheting mechanism. This can inadvertently place the dispensed material where it should not safely or legally be located. Additionally, when trying to place material from such dispensing guns on high ledges or walls and the like, a ladder is required.
The device herein disclosed provides a means to reach areas that have been either impossible or hard to reach, with ease, through the provision of a flanged dispenser extension and extrusion system which allows the user to dispense a precisely controlled amount of insecticide or other substances in these areas by rotating a hand knob. The substance application ceases immediately when rotating of the hand knob stops. Additionally, the device can be provided in variable lengths which can be assembled by simply adding or subtracting central lengths within the system. Further utility is provided by a small flashlight or other illumination means which may be attached to the device for viewing into dark and hard to reach areas for proper placement of the material. Finally, high areas may be reached using the device without a ladder, and when combined with the angled tip adapter, both high places and confined places are easily accessed by the user.
U.S. Pat. No. 3,512,684 of (Sutton) describes an extended in length gun for the use with conventional cartridges of caulking compound and the like. The gun includes a handle and trigger assembly and a cartridge holding chamber, joined by an elongated cylindrical casing within which a guide tube is mounted for receiving the pressure rod of the gun. The guide tube prevents bowing or deflection of the pressure rod, thereby assuring even dispensing of the material when the trigger is actuated. Sutton describes the conventional style of ratchet caulking guns restraining the cartridge at the front adjacent to the controlled volume orifice. It does not describe the rotational activation means, the variable extension means, the restraining of the cartridge by the opposing flanges at the rear or the addition of the flashlight.
U.S. Pat. No. 3,726,440 (Deeb) teaches of a caulking gun where the cartridge chamber is connected with the trigger assembly by a tubular casing and a pressure member which are adjustable so as to provide a caulking gun of any desired length and the trigger assembly is rotatably connected to the tubular casing or to the cartridge chamber so that the relative position of these two components may be varied. Deeb describes an extension to a conventional ratchet-style caulking gun restraining the cartridge at the front adjacent to the controlled volume orifice. It does not describe the rotational activation means, the variable extension means, the restraining of the cartridge by the opposing flanges at the rear or the addition of the flashlight. With the ratchet-style of caulking gun the only way to stop the material flow is to turn the angled end of the central shaft containing the ratchet teeth. If not turned, the spring pressure of the mechanism will continue to extrude the material until the pressure is released by reaching the next restraining tooth.
U.S. Pat. No. 4,932,565 (Paradiso) additionally discloses a caulking gun or the like for the dispensing of construction materials such as caulk, glue, sealant, etc. It is provided with a guide at its front end to enable the user more easily and readily to follow an object such as a construction member, groove and other line to which the material is applied. It is provided with an elongated extension, enabling operation of the gun by a standing rather than a kneeling workman. Paradiso tells of another extendable conventional ratchet-style caulking gun restraining the cartridge at the front adjacent to the controlled volume orifice, and does not describe the rotational activation means, the variable extension means, the restraining of the cartridge by the opposing flanges at the rear or the addition of the flashlight.
U.S. Pat. No. 5,692,642 (Brattesani) describes a fluid dispenser adapter and method of use. It is a dispenser adapter which allows dispensing of multiple types of materials with use of a single dispensing device. The invention includes a cartridge holder with a socket for receiving a replaceable cartridge of adhesive, filler, or other material. The cartridge holder is reversibly coupled to a dispensing device such as a syringe or dispensing gun. A plunger associated with the cartridge holder forces material from the cartridge. Force is transferred from the piston of the dispensing device to the plunger of the dispenser adapter apparatus by mechanical
Harms Donn K.
Jacyna J. Casimer
LandOfFree
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