Charles P Irwin

US Patent:

20070289147, Dec 20, 2007

Filed:

Jun 15, 2007

Appl. No.:

11/763921

Inventors:

Charles Dana Irwin - Westerville OH, US

International Classification:

B27B 17/00

US Classification:

30381

Abstract:

A device for cutting woody vegetation has a high-impact thermoplastic housing with a handle formed thereon for single-handed use by a left- or right-handed user. A cutting bar extends from the housing, with an endless cutting chain arranged on a track provided on a periphery of the cutting bar. Cutting elements are disposed on the endless chain. A direct current electric motor is mounted longitudinally in the housing such that a drive shaft of the motor terminates in a worm gear that transmits drive torque to a drive gear engaged with the endless chain. The cutting bar and electric motor are sized and positioned within the housing such that a balance point of the housing is located at an end of the handle portion in the direction of the cutting bar. Power for the electric motor is provided by a battery pack worn by the user.

US Patent:

46071857, Aug 19, 1986

Filed:

Feb 1, 1985

Appl. No.:

6/697277

Inventors:

Lawrence E. Elbert - Huntington Beach CA
Charles S. Irwin - Santa Ana CA

Assignee:

American Hospital Supply Corporation - Evanston IL

International Classification:

H01L 4108

US Classification:

310323

Abstract:

An ultrasonic horn assembly, particularly suitable for dissolving reagent tablets in a liquid solution in a cuvette which is moved along a path next to the front end face of the horn, includes a generally cylindrical converter fixed to a rear end face of the horn body substantially medial of the length of the rear end face. A pair of elongate resonating members are each fixed at one end to a different side end region of the rear end face on the horn body, and extend perpendicularly from the rear end face. The resonating members cause acoustic waves to propagate from the front end face of the horn body at substantially uniform amplitude along the length of the front end face, so that objects such as cuvettes moving parallel to the front end face are continuously subjected to uniform acoustic waves to insure a thorough dissolving or mixing operation.