Harris A Thompson
Engineers at Bellevue Dr, Boulder, CO

4287886, Sep 8, 1981

May 12, 1980

6/148766

Harris A. Thompson - Boulder CO

A61M 1600

12820222

In artificial respiration apparatus of the type which uses a breathing tube extended from the apparatus to a patient. An alarm system is incorporated into the apparatus which responds to a disruption of the cyclic air pressures therein through connection with an air supply passageway in the respirator. The invention uses a sensor tube, extended from the respirator apparatus to the remote end of the breathing tube. This sensor tube connects with the alarm system so it may respond to a disruption of the cyclic pressures at this remote end of the breathing tube. A selector valve at the respirator apparatus connects the alarm system with either the air supply passageway in the apparatus or with the sensor tube. The sensor tube terminates as a jack which is inserted into a socket in the selector valve. The alarm responds to pressures in the air supply passageway when the jack is not in the socket.

4076021, Feb 28, 1978

Jul 28, 1976

5/709450

Harris A. Thompson - Boulder CO

A61M 1600

1281456

This invention is a positive pressure respiratory apparatus to cyclically pump proper volumes of air for inspiration by a patient, through a breathing tube extended to the patient. The unit, formed in a compact package, includes a pump, a piston within a cylinder and a breathing tube extending from the cylinder to the patient. The cylinder volume does not greatly exceed the proper volume of air for inspiration by a patient. The piston is cyclically reciprocated within the cylinder at a rate which corresponds to natural or selected inspiration and exhalation breathing cycles of the patient, and this piston moves in the cylinder a distance sufficient to displace the aforesaid volume of air. A valving means permits air to enter the cylinder during the patient's exhalation cycle of breathing when the piston moves away from the cylinder end and to confine the flow of air to the breathing tube during the inspiration cycle, when the piston moves towards the cylinder end wall. This unit is adapted to operate on a common 110 volt A. C.

4301793, Nov 24, 1981

Nov 13, 1979

6/093794

Harris S. Thompson - Boulder CO

A61M 1600

12820421

A sigh producing mechanism in a blower type positive pressure respirator. In breathing, a normal person will occasionally take a deep breath, a sigh, to break the monotony of regular breathing. In artificial respiration, such occasional sighs are also desired. The sigh is produced by an increase in the speed of the blower for a few breathing cycles. To produce the sigh, the resistance to the blower motor is reduced and this is accomplished with the aid of a timer to space the sigh intervals and limit the duration of the sigh cycles.

4239039, Dec 16, 1980

Feb 28, 1979

6/015784

Harris A. Thompson - Boulder CO

A61M 1600

12820524

The present invention relates to improvements in the portable, positive-pressure artificial respiration apparatus and, more particularly, to improvements in the air passageway systems of such apparatus by using a dual control valve.

4286589, Sep 1, 1981

Nov 13, 1979

6/093795

Harris A. Thompson - Boulder CO

A61M 1600

12820222

In an artificial respiration apparatus, especially in positive pressure types, it has been found that an extension lead for a respirator alarm system is desirable. This lead will extend beyond the respirator to permit a patient to initiate an alarm when help is needed. The lead is connected to the alarm initiating circuit in the respirator in a manner which makes its connection or disconnection optional with the alarm system in the respirator working in its regular manner when the extension lead is disconnected.