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:
Jun. 04, 2002
Filed:
Feb. 16, 2000
Kim L. Richardson, Herriman, UT (US);
Richard N. Rachal, Sandy, UT (US);
Ultradent Products, Inc., South Jordan, UT (US);
Abstract
A syringe is provided for delivering compositions having a hollow elongated barrel engaged by a plunger with a unique plunger tip. The plunger tip extends from a round and hollow sidewall of the stem of the plunger by bifurcating into an inset branch and a spring lever. The inset branch and the spring lever define a radial tensioning groove. The lower portion of the spring lever is flat while the upper portion of the spring lever flares outward at an angle with respect to the lower portion and then terminates at a rounded distal contact end. As a result, the diameter of the spring lever at the rounded distal contact end is slightly greater than the diameter of the inside of the barrel before the plunger is inserted into the barrel. The spring lever is sufficiently flexible that upon insertion of the plunger into the chamber of the barrel, the radial tensioning groove compresses due to the spring lever flexing toward the inset branch. The spring lever is also sufficiently rigid to enable the rounded distal contact end to be exerted against and to form a seal with the interior of the barrel.