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:
Jan. 27, 1981
Filed:
Jul. 23, 1979
Louis J Travalent, Lee's Summit, MO (US);
Herbert Arenson, Shawnee, KS (US);
Cutter Laboratories, Inc., Berkeley, CA (US);
Abstract
A syringe for dispensing medicaments includes a barrel with a discharge end and an open end for receiving a plunger. The plunger has a head with engagement means for receiving a plunger seal. The plunger seal is a tubular member which is severed along a generally longitudinal direction providing a slit which allows the seal to be expanded for fitting onto the plunger head. Preferably the slit has an irregularity at the forward end which provides a locking configuration which prevents the seal from being twisted away from its normally tubular shape. For metered dose application, the shank of the plunger may be threaded for the desired placement of a stop ring threaded on the shank. In one form, the ring and barrel have interlocking means to prevent the ring from moving backward when pressure is applied to the plunger after the ring has reached the barrel.