Internal Pressure Regulating Marker Pen
AssigneeMilwaukee Electric Tool Corporation
InventorJames G. Ballard
Life of this patent
Estimating the term…
Abstract
A writing implement is configured to dispense material onto a work surface. The writing implement includes a body having a first end, a second end, and an inner surface. The writing implement also includes a nib coupled to the first end. The nib is configured to allow the material to be dispensed onto the work piece. The writing implement further includes a pressure regulating assembly coupled to the body. The pressure regulating assembly and the inner surface define a cavity configured to hold the material. The pressure regulating assembly is moveable relative to the body in response to a pressure change within the cavity.
Claims20
A writing implement, comprising:
- a body comprising:
- a first end;
- a second end;
- and
- an inner surface defining a cavity between the first end and the second end, the cavity comprising a marking material;
- a nib coupled to the first end and configured to dispense the marking material on a work piece;
- an end cap coupled to the inner surface and configured to allow ambient air to pass through the end cap out of the cavity;
- a piston having a first surface facing the first end and a second surface facing the second end;
- and
- a seal coupled to the piston between the first surface and the second surface, wherein at least one of the piston and the seal slideably engages the inner surface of the body.
A writing implement, comprising:
- a body comprising:
- a first end;
- a second end;
- and
- an inner surface defining a cavity between the first end and the second end, the cavity comprising a marking material;
- a nib coupled to the first end and configured to dispense the marking material on a work piece;
- an absorbent porous end cap coupled to the inner surface and configured to allow ambient air to pass through the absorbent porous end cap out of the cavity;
- and
- a pressure regulating assembly coupled to the second end of the body.
A method of manufacturing a writing implement, the method comprising:
- providing a body including a first end, a second end opposite the first end, and an inner surface defining a cavity between the first end and the second end;
- inserting a piston into the cavity of the inner surface of the body, the piston configured to be moveable relative to the body to control a pressure within the cavity;
- injecting a material through the first end of the body into the cavity;
- and
- coupling a nib to the first end of the body, the nib configured to allow the material to be dispensed onto a work surface.
Dependencies are inferred from the claim text.