JAMES NELSON CORNWELL
Physician in Erie, PA

6450550, Sep 17, 2002

Sep 8, 2000

09/658314

James P. Cornwell - Erie PA

R. Conrader Company - Erie PA

F16L 1906

285340

A fitting for retaining a cylindrical tube includes a fitting body having a hole extending through it. The hole includes a cylindrical main cavity located at one end of the body into which an end of the tubing can be inserted. A circular retaining shoulder is located on the tubing so that the shoulder is within the main cavity when the tubing is placed in the fitting. A closure, such as a snap ring, is installed at the open end of the main cavity to hold the shoulder within the main cavity. The closure has a circular hole within it to receive the tubing. An elastomeric seal is mounted within the main cavity between the shoulder and the closure. The inner diameter and the outer diameter of the seal cause the seal to be compressed between the tubing and the wall of the main cavity. A preselected shoulder clearance gap is formed between the retaining shoulder and the main cavity, a preselected closure clearance gap is formed between the tubing and a hole in the closure, and an axial gap is formed within the axial length of the main cavity so that the shoulder can move freely within the main cavity as a result of these gaps while being retained within the cavity so as to minimize fatigue on the tubing while the tubing is being retained by the fitting.

6698446, Mar 2, 2004

Jul 12, 2002

10/194528

James P. Cornwell - Erie PA

R. Conrader Company - Erie PA

F16K 2110

13711516, 13711515, 13711524, 1375145, 251 64, 417299

A check valve with an elongated body and a hole extending from an inlet end to an outlet end. A piston assembly is mounted within the body and can include a piston, a check valve seal and a piston spring. The piston spring biases the piston to a first piston location preventing air from flowing from the inlet toward the outlet end. The check valve seal can be positioned on the piston assembly to seal against either a check valve seat or the inside diameter of the hole to restrict air flow when the piston is in the first piston location. Movement of the piston to a downstream piston location can remove the check valve seal from the check valve seat and/or from the inside diameter of the hole, allowing air to flow from the inlet end toward to outlet end.

2008006, Mar 13, 2008

Sep 13, 2006

11/531425

James P. Cornwell - Erie PA, US

F04B 39/10

417571

A cylinder arrangement for a reciprocating air compressor system includes a compressor pump having a compression cylinder and piston. An inlet valve moves to an open position and allows air to enter the compression cylinder through an inlet valve clearance during intake strokes of the piston. The inlet valve moves to a closed position and prevents air from exiting the compression cylinder through the inlet valve clearance during compression strokes of the piston.An orifice has a minimum cross sectional area smaller than the inlet valve clearance. The orifice allows air to enter the compression cylinder during intake strokes of the piston and allows air to exit the compression cylinder during piston compression strokes. The amount of air passing through the orifice is significantly less than the amount of air passing through the inlet valve clearance during each intake stroke. The orifice relieves backpressure within the compression cylinder.

7086841, Aug 8, 2006

Apr 19, 2004

10/827647

James P. Cornwell - Erie PA, US

R. Conrader Company - Erie PA

F04B 49/03, F16K 31/36

417290, 417295, 417298, 417441, 1374925

An automatic inlet control mechanism and air compressor unit include a valve cavity and valve outlet. The valve cavity includes a valve control chamber and valve inlet chamber. A valve piston assembly is positioned between the valve control chamber and the valve inlet chamber to prevent the flow of air between therebetween. The valve outlet allows air to flow from the valve inlet chamber into the compressor unit. The valve piston assembly prevents air from flowing from the valve inlet chamber to the valve outlet when the compressor unit is not drawing air. A vent passageway allows air to flow between the valve control chamber and the compression cylinder inlet when compression is begun at the start-up of the compressor unit or at the loading of the idling compressor unit. A vent orifice restricts the flow of air from the valve control chamber to the compression cylinder inlet.

2006007, Apr 6, 2006

Oct 3, 2005

11/242550

James Cornwell - Erie PA, US
Mark Crays - Venango PA, US

F16K 31/12

251055000

A pressure relief valve for exhausting pressure from a pressurized device, includes a valve body that has a first end and a second end, a chamber extending through the valve body, and a valve seat located within the valve body. A valve member comprises a piston and a stem, with the piston shaped so it can be mounted adjacent the valve seat. A spring is mounted within the chamber so as to bias the piston toward the valve seat. In one embodiment a valve cap includes a sidewall shaped to fit around the outside of the second end of the valve body and has a hole through which the stem extends. The valve cap is connected to said valve body in a manner that renders the valve substantially inoperable at the preselected pressure once the valve cap's position is changed. In another embodiment, the stem is a formable wire that extends through the valve body and stem is bent to enable the valve member to move within the valve body.

7648343, Jan 19, 2010

Oct 12, 2006

11/548724

James P. Cornwell - Erie PA, US

F04B 49/22

417 53, 417278, 417298, 417441

A method allows for controlling the amount of electric current from an electrical circuit used by an electric motor in an electric motor driven reciprocating air compressor unit. A piston is reciprocated with a portable electric motor while air is channeled through an inlet into a compression cylinder, allowing the piston to draw on compressed amounts of air during each reciprocation. A valve mechanism is mounted to the inlet and is adjustable to a plurality of positions, each position allowing for one of a plurality of predeterminable amounts of air to be permitted to be drawn into the compression cylinder and compressed. The valve mechanism is manually adjusted to control the amount of air drawn into the compression cylinder and compressed by the piston to control the amount of electric current used by the electric motor.

7540304, Jun 2, 2009

Apr 18, 2005

11/108501

James P. Cornwell - Erie PA, US

R. Conrader Company - Erie PA

F16K 15/14, F04B 53/10

137860, 137903, 417566

A check valve includes a valve body having an inlet end through which air enters the valve and a valve cavity extending through the valve body and leading to an outlet end. A valve assembly is located at a position that enables control of the flow of air through the valve cavity. The valve assembly includes a tapered section having a cross section that increases in diameter in a direction that is downstream from the inlet end of the valve and which may be included as part of a plug. An elastomeric seal is mounted around the tapered section to reciprocate on the tapered section, with the tapered section biasing the elastomeric seal to a normal position at which the seal comes into sealing contact with both the valve body and tapered section to prevent the downstream flow of air from the inlet end out the outlet end.

7458392, Dec 2, 2008

Sep 13, 2005

11/224772

James P. Cornwell - Erie PA, US

R. Conrader Company - Erie PA

F16K 15/14, F04B 53/10

137529, 137535, 137860, 137903, 417566

A check valve is for use in a fluid system. A valve body has an inlet end, a valve cavity, and an outlet end. A valve enables a valve assembly to control the flow of fluid therethrough. A plug of the valve assembly includes tapered and non-tapered sections, the tapered section having a cross section that increases in diameter in a direction that is downstream from the inlet end of the valve body. A sealing ring is mounted to reciprocate on the non-tapered section and an elastomeric actuation ring is mounted along the tapered section. The tapered section biases the actuation ring to a normal position, at which the actuation ring contacts and positions the sealing ring in contact with the valve body and the valve assembly to prevent fluid from flowing out the outlet end of the valve body.

7153106, Dec 26, 2006

Jan 16, 2003

10/346145

James P. Cornwell - Erie PA, US

R. Conrader Company - Erie PA

F04B 49/22

417213, 417441

A portable electric motor driven reciprocating air compressor unit has a compression cylinder having a piston that reciprocates in the cylinder. The piston is driven by an electric motor that is attached to an electrical circuit having a predeterminable current capacity. A manually controllable valve mechanism is mounted to an inlet to allow for the channeling of air into the compression cylinder. The manually controllable valve mechanism allows for control of the amount of air that the piston draws and compresses for each reciprocation. The amount of electric current used by the electric motor to drive the piston depends on the amount of air drawn and compressed. A user can therefore control the amount of electric current that the compressor unit uses by using the valve mechanism to control the amount of air that is drawn into the compression cylinder and compressed during each reciprocation of the piston.