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:
Sep. 02, 1980
Filed:
Oct. 31, 1978
Woodrow S Wilson, Johnston, RI (US);
Robert E Hazard, Kingstown, RI (US);
Polytop Corporation, Slatersville, RI (US);
Abstract
A complete closure including a closure member formed as a bottle cap or integrally with a container and lid connected to the closure member by a hinge or hinge-type structure may be constructed so as to utilize a spring structure and a cam structure serving to cooperate to hold the lid in either a closed position in which the lid covers an opening through the closure member or an open position in which the lid is spaced significantly from the opening. Preferably the complete closure is formed as an integral unit out of a polymer such as polypropylene in such a manner that the spring structure consists of upstanding resilient posts on the top of the closure member and so that the cam structure consists of substantially non-bending or rigid portions of the lid which are located so as to contact and deform the posts during movement of the lid. The complete closure is considered quite desirable because of its effectiveness and because it can be manufactured at a very nominal cost using straight pull injection molding dies to form the operative parts of the lid and the closure member.