Jonathan M Benson

US Patent:

55317693, Jul 2, 1996

Filed:

Dec 29, 1994

Appl. No.:

8/366664

Inventors:

Helge Fossan - Stavanger, NO
Jonathan M. Benson - Oregon City OR

Assignee:

Laerdal Manufacturing Corp. - Tualatin OR

International Classification:

A61N 139

US Classification:

607 7

Abstract:

A defibrillator utilizes at least one flash tube for switching electrical energy from an energy source to a heart patient. The flash tube has a high impedance state in which the patient is isolated from the energy. In response to a triggering pulse, the flash tube enters a low impedance state in which energy is delivered to the patient. An additional switching element in the defibrillator operates to interrupt energy delivery through the flash tube so that a truncated defibrillation pulse having a desired energy level is produced.

US Patent:

48237965, Apr 25, 1989

Filed:

Apr 3, 1987

Appl. No.:

7/034487

Inventors:

Jonathan M. Benson - Oregon City OR

Assignee:

Laerdal Manufacturing Corp. - Portland OR

International Classification:

A61N 136

US Classification:

128419D

Abstract:

A pulse delivery control signal is applied to and removed from a master or pulse delivery electronic switch to respectively start and terminate the delivery of a trapezoidal waveform defibrillation pulse from charge storage capacitors to a patient. In one specific embodiment, a transfer charge storage circuit is coupled to a capacitor charging circuit for charging as the charge storage capacitors are charged. A transfer switch interconnects the transfer charge storage circuit to a first field-effect transistor switch. In response to a transfer signal, a transfer voltage signal is delivered from the transfer charge storage circuit, through the transfer switch and to the first field-effect transistor. In response, the first field-signal transistor applied the pulse delivery control signal to the master switch. A second field-effect transistor may be included for operating the master switch together with the first field-effect transistor.

US Patent:

20190333680, Oct 31, 2019

Filed:

Apr 18, 2019

Appl. No.:

16/387719

Inventors:

- Berlin, DE
JONATHAN M. BENSON - WEST LINN OR, US

International Classification:

H01F 27/28
H01F 27/24
H01F 41/06
H01F 41/04
H05K 1/11

Abstract:

A transformer assembly has an electrical transformer with a wound coil. The coil includes at least one primary wire with two ends, and at least one secondary wire with two ends. The wires are wound to form at least one primary winding and at least one secondary winding of the transformer. A substrate is provided for carrying the transformer. The substrate includes a main part and at least one outer part. The main part carries the transformer and the at least one outer part of the substrate is hinged to the main part and is pivoted towards the transformer. There is also described a method for producing a transformer assembly.