Normand L Lagasse

US Patent:

50674544, Nov 26, 1991

Filed:

Jun 14, 1989

Appl. No.:

7/366786

Inventors:

Clive Waddington - Stratford CT
Normand L. Lagasse - Milford CT
Roger Taupier - Orange CT

Assignee:

Avco Corporation - Providence RI

International Classification:

F01M 100

US Classification:

123196S

Abstract:

An automatic self compensating flow control lubrication system for continuously supplying the requisite amount of lubricant to at least one component of a drive system. One or more operating parameters, such as scavenge temperature, are continuously monitored and the information provided to a computer. The computer operates the first stage solenoid valve of a two stage valve assembly which provides such an amount of lubricant to the component as is necessary to maintain a predetermined value of the operating parameter. Scavenge temperature is one such operating parameter.

US Patent:

47170000, Jan 5, 1988

Filed:

Aug 5, 1986

Appl. No.:

6/893176

Inventors:

Clive Waddington - Stratford CT
Normand L. Lagasse - Milford CT
George T. Milo - Stratford CT

Assignee:

Avco Corporation - Providence RI

International Classification:

F01M 118
F01M 1110
F01M 910
F16C 3500

US Classification:

184 61

Abstract:

An integrated emergency lubrication system is provided to lubricate the bearings of a gas turbine engine in the event that the normal lubrication system for the engine fails for any reason. The emergency system includes an accumulator for storing oil, derived from the normal lubrication system, that is released in a controlled manner to lubricate the engine's bearings for several minutes after the normal lubrication system fails. During that time, the operator of the engine has an opportunity to cope with the situation. Energy for operating the emergency lubrication system is derived from compressed air bled form the compressor section of the engine, the compressed air also being combined with oil from the accumulator to form an air/oil mist that is sprayed over the bearings to be lubricated. A plurality of valves provided to control the flow of the oil and the air and to regulate the pressure of the air, all valves and associated elements being integrated in an assembly that is relatively inexpensive to manufacture, highly reliable, and easily maintained. The configuration also minimizes vulnerability to extraneous forces and has the further benefit of not being attitude sensitive, rendering it particularly useful in aircraft employing gas turbine engines.

US Patent:

45691967, Feb 11, 1986

Filed:

Apr 20, 1984

Appl. No.:

6/602343

Inventors:

Clive Waddington - Stratford CT
Normand L. Lagasse - Milford CT
George T. Milo - Bridgeport CT
John G. Van Kamerik - Huntington CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

F02C 706

US Classification:

60 3908

Abstract:

A lubrication system including a regulating valve and a bellows is provided for controlling the flow of lubricant from a source of lubricant under pressure to the gearbox and sump of an aircraft gas turbine engine as a function of the altitude at which the engine is operating. An override valve by-passes the regulating valve and cuts off flow of lubricant to the sump while assuming control of lubricant flowing from the source to the gearbox when a detent valve, operatively associated with the bellows, detects that either the regulating valve or the bellows is inoperative and permits the override valve to become operative.

US Patent:

44520379, Jun 5, 1984

Filed:

Apr 16, 1982

Appl. No.:

6/368938

Inventors:

Clive Waddington - Stratford CT
Normand Lagasse - Milford CT
Charles Kuintzle - Monroe CT
Donald Blake - Trumbull CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

F02C 706

US Classification:

60 3908

Abstract:

Apparatus is disclosed for automatically purging oil from the jets supplying lubricant to bearings and seals in a turbine engine after shutdown. To accomplish this task, pressurized air is tapped from the air plenum just downstream of the engine compressor stage. The pressurized air is stored in a small tank using an air check valve in the incoming line so that the air tank is charged to the highest pressure achieved by the engine compressor during its operation. The outlet of the air tank is connected to the oil jets used for lubricating the engine bearings and seals. A snap action valve is inserted in the air supply line to activate and deactivate airflow out of the tank. The snap action valve is designed to be switched "off" whenever there is positive oil pressure in the lubricating supply line of the turbine engine. After engine shutdown, lubricant flow drops, reducing oil pressure to zero. This event initiates the start of a delay interval after which the snap action valve is activated to its "on" state allowing the contents of the air tank to be blown through the oil jets, effectively clearing them of oil.

US Patent:

40916634, May 30, 1978

Filed:

Oct 22, 1975

Appl. No.:

5/624689

Inventors:

Normand L. Lagasse - Milford CT
Richard P. Cuny - Stratford CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

G01L 302

US Classification:

73136R

Abstract:

The torque transmitted through a pair of helical gears mounted on a lay shaft imposes an axial force on the lay shaft which is reflected into fluid pressure to indicate the magnitude of the torque. By journaling the lay shaft within sleeves which are also the inner races of a pair of roller bearings its axial movements are sensitively transmitted to a nonrotating piston rod mounted in ball bearings within the bore of the lay shaft. The piston is displaceable into a cylinder supplied with pressurized lubricating fluid through a valve responsive to the axial displacenent of the piston. The fluid pressure in the cylinder balances the axial force transmitted to the piston and is proportional to the transmitted torque.