Vermont American Corporation

Chromatography Research Supplies, Inc.

David S Hubbard

Ved P Gakhar

Wilfred M McCord, Jr

Mohamed M Marei

Edward J Heiny

Christopher A Carlisle

David L Jones

A septum contains at least one internal chamber along the central axis of the septum. The chamber provides relief space into which the sealing sections of the septum can deform as a needle passes through the septum. Incorporation of the chamber reduces surface area contact and friction between the septum and needle, which results in reduced septum tearing and reduced production of particulate matter from abrasion.

Chambered septum

A septum containing a duckbill valve assembly includes a plurality of elastomeric ribs extending from the body of the septum to the duckbill valve assembly. When inserted into an injection port cavity, force generated by an interference fit between the body of the septum and the cavity is transmitted by the ribs to the duckbill valve assembly. The ribs are configured to reversibly collapse at a hinge point when a needle is inserted through the duckbill valve assembly and are spaced to assist in centering the needle in the duckbill valve assembly. The ribs reduce wear on the duckbill valve assembly by reducing the concentration of compressive forces at higher inlet pressures while maintaining sufficient compressive force to close the duckbill valve assembly at lower inlet pressures.

Duckbill septum

Caulking gun

A caulking gun holder/driver is adapted to be driven by a cordless screwdriver or other power driver and includes two different shafts to which the driver can be attached. The holder/driver has a receptacle for receiving a tube of caulk, a threaded pusher rod with a pusher plate at its distal end to drive the caulk out of the receptacle, and flats at the proximal end to receive a power driver for 'high speed' advance or retraction of the threaded driving rod, and a main drive shaft adaptable to receive the same power driving unit to rotate the threaded rod in a 'slow speed' for better caulking application. In the dispensing mode, the threaded rod is connected via gear-reducer to the second drive shaft which permits only slow advancement of the threaded rod for better control of the flow of caulking compound out of the caulking tube, and prevention of 'dribble' when power is turned off to the driving unit.

Caulking gun attachment for use with a high RPM power driver and capable

Growing community of inventors

Louisville, KY, United States of America

David S Hubbard