×

Paste dispensing brush

DC
  • US 5,158,383 A
  • Filed: 06/21/1991
  • Issued: 10/27/1992
  • Est. Priority Date: 06/21/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A brush that dispenses extrudable material, comprising:

  • a stem having a first end portion and a second end portion, a head attached to said second end portion of said stem, said head having bristles extending therefrom, said head having at least one discharge aperture therein adjacent to said bristles, said stem having a tapered bore therein extending from said first end portion towards said second end portion so as to communicate with said at least one discharge aperture, the largest diameter of said tapered bore being at said first end portion of said stem, said first end portion of said stem being adapted to have secured thereto a cartridge for containing extrudable material wherein the cartridge has a first end and a second end with the second end of the cartridge being attachable to said first end portion of said stem;

    a pump for delivery of extrudable material from said cartridge to said at least one discharge aperture and onto said bristles, said pump comprising;

    (a) a tapered piston having a first end portion and a second end portion, said tapered piston having a passageway therethrough extending from said first end portion of said tapered piston to said second end portion of said tapered piston, said tapered piston being disposed within said tapered bore and having an outer contour which at least substantially corresponds to the contour of said tapered bore such that said tapered piston will nest in said tapered bore, said tapered piston being movable along said tapered bore between a closed position and an opened position, said passageway and said at least one discharge aperture being in communication with each other when said tapered piston is in said opened position, the communication between said passageway and said at least one discharge aperture being blocked when said tapered piston is in said closed position;

    (b) a piston disk having an orifice extending therethrough, said piston disk being attached to said first end portion of said tapered piston with said orifice providing communication between said passageway and a cartridge when the second end of a cartridge is attached to said first end portion of said stem; and

    (c) a button associated with said piston disk such that pressing said button moves said tapered piston to said opened position and moves said piston disk towards the first end of a cartridge, when the second end of a cartridge is attached to said first end portion of said stem, to extrude extrudable material from the cartridge through said orifice of said piston disk, through said passageway, and through said at least one discharge aperture, and releasing said button moves said tapered piston to said closed position and moves said piston disk away from the first end of a cartridge when the second end of a cartridge is attached to said first end portion of said stem.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×