The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 15, 1992
Filed:
Nov. 04, 1991
Walter B Spatz, Los Angeles, CA (US);
The Spatz Corporation, Oxnard, CA (US);
Abstract
A container (12) includes a discharge outlet (18) and a pliant tubular wall (16) which extends longitudinally from the outlet. The wall of the container is adapted to be deformed by being squeezed for dispensing a mass (24) from the container through the outlet. A piston follower (26, 126) in the container, which is movable towards the outlet and against the mass, has seals (60, 61; 160, 162) that slide on, yet remain sealed with the wall to prevent both leakage of the mass past the seals out of the container and leakage of air past the seals into the container. Degradation in the sealing engagemenet of the seals with the container wall, when the wall is squeezed, even under excessive force, is essentially prevented by a rigid support (72), which is embodied as a ring (138) or radially and longitudinally extending webs (42) acting as struts. The rigid support ensures that the seals will not lose contact with the inner wall surface (17) of container (12). Latches (50, 150) on the follower prevent substantially all movement of the follower in a direction away from the outlet but permit movement of the follower in a direction toward the outlet. The latches are sufficiently distanced from the seals so that neither the deflectability of the latches nor the sealing of the seals is degraded.