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US 5,628,433 AGranted
Caulking tube air escape structure
AssigneeResearch Plastics Inc.
InventorFrederick Binder
Life of this patent
Estimating the term…
Abstract
An improved tube for handling fluent materials such as caulking includes a plurality of ribs that form air escape spaces. The ribs extend inwardly from an inner peripheral wall of the tube for a very small distance. The ribs form an air space between a plunger and the tube allowing air to escape rearwardly of the plunger. In another feature of this invention, a color plastic sleeve is received on a nozzle for the tube to provide an identification of the color of the caulking received within the tube.
Claims14
A tube for receiving a fluent material comprising:
- a tube body being elongated and extending from a rear end to a forward nozzle end;
- a plunger member received within said tube body adjacent said rear end;
- and
- said plunger body having an outer peripheral surface closely matched to an inner peripheral surface of said hollow tube body, air spaces being formed between said outer peripheral surface of said plunger and said inner peripheral surface of said tube body, said air spaces defined adjacent said rear end of said tube body by air space defining members extending to said rear end, said tube body having a diameter, said air space defining members having a radial distance that is less than 1.0% of said diameter of said tube, and each of said air space defining members occupying an area that is less than 0.5% of the area of the interior of said tube.
1 more element
A tube for receiving a fluent material comprising:
- a hollow tube body being generally cylindrical and extending from a rear end to a nozzle end, a plurality of ribs extending radially inwardly from an inner peripheral wall of said tube, said ribs extending radially inwardly for a depth that is less than 0.5% of a diameter of said tube;
- and
- a plunger having an outer peripheral surface closely matched to said inner peripheral surface of said tube, such that when said plunger is received within said tub, air spaces are formed between said plunger and said tube by said ribs, said ribs each occupying an area that is less than 0.5% of the area of said tube, and said ribs extending to said rear end of said hollow tube body.
Dependencies are inferred from the claim text.