Peter Durenec

US Patent:

40491498, Sep 20, 1977

Filed:

Nov 24, 1975

Appl. No.:

5/634744

Inventors:

Peter Durenec - Annandale VA

International Classification:

B65J 102
B65D 2102

US Classification:

220 15

Abstract:

An improved universal corner for freight containers which reduces the cost and simplifies the procedures of constructing freight containers. The corner fitting is designed such that it will form every corner of the container while simultaneously providing means essential for allowing the container to be lifted or coupled to other containers or to surfaces such as decking on ships or the ground.

US Patent:

42066093, Jun 10, 1980

Filed:

Sep 1, 1978

Appl. No.:

5/938782

Inventors:

Peter Durenec - Annandale VA

Assignee:

Actus, Inc. - Florence KY

International Classification:

F25B 900
F25D 300
F25B 1900

US Classification:

62 6

Abstract:

A cryogenic surgical apparatus using a Sterling-cycle refrigerator connected by elongate flexible conduits to a cryosurgical device having an operating probe. The refrigerator includes a compressor having first and second cylinders with pistons positioned therein. The cryosurgical device includes a housing defining an expansion cylinder. An expansion piston and seals are positioned within the cylinder in such manner that first and second distinct expansion spaces are defined between opposite ends of the piston and ends of the cylinder. The operating probe is connected to or positioned on the end of the housing closest to the first expansion space. A regenerator is positioned in the end of the expansion piston closest to the first expansion space and has an outlet communicating with the first expansion space and an inlet communicating with a space intermediate the two expansion spaces. First and second flexible conduits connect the first and second cylinders of the refrigerator, respectively, to portions of the housing in communication with the inlet to the regenerator and the second expansion space. The first cylinder has a larger cross-sectional area than the second cylinder so that the operating probe is cooled when the compressor rotates in a first direction and is heated when the compressor rotates in an opposite direction.

US Patent:

43659829, Dec 28, 1982

Filed:

Dec 30, 1981

Appl. No.:

6/335925

Inventors:

Peter Durenec - Annandale VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F25B 900

US Classification:

62 6

Abstract:

Two embodiments of a Stirling cooler are shown. Each embodiment includes usual compressor portion and cold finger portion. The compressor is improved by inserting a vibration damper in the master piston rod by employing a unique evacuating-charging valve, and be inserting an in-line filter in the cryogen passageway between compressor and cold finger. The cold finger is improved by lining the inside of the displacer-regenerator piston with a highly reflective coating and by inserting a good heat conducting spring between the end of the piston and the opposite wall of the cold finger expansion chamber. In one embodiment, the drive for the compressor crankshaft is improved by using herringbone reduction gears with the layer gear counterbalanced and by using a torsional drive shaft between the electric drive motor and the small herringbone gear. The other embodiment uses direct torsion-shaft drive of the crankshaft, but with a counterbalance on the crankshaft in the form of a weight on a flexible arm.

US Patent:

45246750, Jun 25, 1985

Filed:

Aug 3, 1982

Appl. No.:

6/404783

Inventors:

Peter Durenec - Annandale VA
Clifford E. Lowe - Fredricksburg VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F41G 138

US Classification:

89 4103

Abstract:

A night sight assembly in conjunction with a day sight which is easily cocted and disconnected in total darkness to small defense weapons systems. The assembly is comprised of an infrared viewer amounted on a cradle which is easily connected and disconnected to a small weapon system.

US Patent:

43835481, May 17, 1983

Filed:

Dec 30, 1981

Appl. No.:

6/335926

Inventors:

Peter Durenec - Annandale VA
Aubrey J. Dunn - Springfield VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F16K 4300
F16K 3144

US Classification:

137321

Abstract:

An evacuating-charging valve assembly consisting of a valve permanently mtable onto a fluid system such as an air conditioning system and a connecting head temporarily attachable to the valve. Two embodiments are shown, in both of which the valve has a flange portion for mounting to the fluid system, and a boss portion. Each boss portion is internally bored and threaded and has a ball-ended setscrew, with the ball against the end of a hole through the flange. In one embodiment, the setscrew has slots through its threads, and the connecting head screws into the boss. In the other embodiment, holes are bored through the boss and the connected head screws onto external threads on the boss. Both connecting heads have a setscrew wrench inside, and an external knob for rotating or linearly moving the wrench, and have passageways through them to an external hose connection. When the setscrews are unscrewed, a fluid passageway exists between the hole through the flange and the external hose connection.

US Patent:

40928292, Jun 6, 1978

Filed:

Nov 6, 1975

Appl. No.:

5/629452

Inventors:

Peter Durenec - Annandale VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F01B 2910
F02G 104

US Classification:

60517

Abstract:

A compressor for a cryogenic cooler such as the Stirling cycle type or eqalent related types is provided in which all the forces and moments generated by its moving parts are balanced to eliminate noise and vibration.

US Patent:

44124236, Nov 1, 1983

Filed:

Jun 16, 1982

Appl. No.:

6/388766

Inventors:

Peter Durenec - Annandale VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F25B 900

US Classification:

62 6

Abstract:

A pneumatic space and an expansion space are provided in a cooling head hng a double-ended piston. A fluid line from the cooler compressor feeds directly into the expansion space, and, via a fluid delay, into the pressure space. In response to the fluid pressure waves in the lines, the piston is first moved in one direction by fluid in the expansion space and in the opposite direction by fluid in the pneumatic space.

US Patent:

44741065, Oct 2, 1984

Filed:

Apr 5, 1982

Appl. No.:

6/365220

Inventors:

Peter Durenec - Annandale VA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

F16J 108
F16J 908

US Classification:

92159

Abstract:

A fluidic bearing seal assembly comprised of a plurality of floating back ring seals positioned in a plurality of annular grooves in a piston with at least one free-floating sealing wedge fitted to the outer peripheral edge of each backing ring for sliding along the cylinder wall. The piston has an inlet port and one way check valve means in the head thereof through which the working fluid is compressed during the compression stroke into a plurality of passageways that route the working fluid under pressure against said plurality of floating backing ring seals and into a pressure reservoir directly in contact with the cylinder wall and between adjacent backing ring seals to press the backing ring seals and seal wedges against the cylinder wall during the compression stroke and release the pressure from the ring seals and wedges during the return stroke of the piston.