John D Zavisa

US Patent:

59190337, Jul 6, 1999

Filed:

Sep 19, 1997

Appl. No.:

8/934162

Inventors:

Ron C. Singleterry - Sarasota FL
John Zavisa - Murfreesboro TN

Assignee:

Standex International Corporation - Salem NH

International Classification:

F04B 4900

US Classification:

417310

Abstract:

A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the bypass flow channel with an interference fit. That axial end of the sleeve bearing the valve seat face projects, for a substantial proportion of the sleeve length, beyond the first counterbore shoulder into a second counterbore space to provide an annular space around the outside diameter surface of the sleeve to free the seat face end of the sleeve from direct structural restraint.

US Patent:

58207155, Oct 13, 1998

Filed:

Sep 15, 1997

Appl. No.:

8/929700

Inventors:

Ronald Clinton Singleterry - Bell Buckle TN
John Zavisa - Murfreesboro TN

Assignee:

Standex International Corporation - Murfreesboro TN

International Classification:

B32B 3116
G01F 120

US Classification:

156 731

Abstract:

A line strainer for screening fluid flow in a small diameter conduit is constructed with an integral housing of clear or transparent thermoplastic polymer. A fluid flow channel through the housing center is terminated at opposite ends by sonically welded end fittings. Internally of the housing, a screen chamber is separated from a flow meter chamber by a screen support hub with flow diversion passages. The screen chamber confines a conically formed screen mesh for passing substantially all flow through the housing. The flow meter chamber has conically tapered walls that support radial fins projecting from the walls inwardly to a cylindrical void that confines the metering ball to displacement along the housing axis. A spring bearing against the metering ball resiliently biases the ball toward the flow restriction passage and against the fluid flow direction. The spring bias and conically tapered meter walls cooperate with the flow stream and metering ball to stabilize at a position along the housing axis that is proportional to the flow rate through the screen.

US Patent:

60889160, Jul 18, 2000

Filed:

Mar 25, 1999

Appl. No.:

9/276624

Inventors:

Ron C. Singleterry - Sarasota FL
John Zavisa - Murfreesboro TN

Assignee:

Standex International Corp. - DE

International Classification:

B23P 1500

US Classification:

2988802

Abstract:

A pump includes a coaxially integrated pump bypass/relief valve element of high density polymer material seats against a hard metallic sleeve that is pressed into a first counterbore around the bypass flow channel with an interference fit. That axial end of the sleeve bearing the valve seat face projects, for a substantial proportion of the sleeve length, beyond the first counterbore shoulder into a second counterbore space to provide an annular space around the outside diameter surface of the sleeve to free the seat face end of the sleeve from direct structural restraint.

US Patent:

57171378, Feb 10, 1998

Filed:

Feb 1, 1996

Appl. No.:

8/595203

Inventors:

Ronald Clinton Singleterry - Bell Buckle TN
John Zavisa - Murfreesboro TN

Assignee:

Standex International Corporation - Murfreesboro TN

International Classification:

G01F 314

US Classification:

73239

Abstract:

A line strainer for screening fluid flow in a small diameter conduit is constructed with an integral housing of clear or transparent thermoplastic polymer. A fluid flow channel through the housing center is terminated at opposite ends by sonically welded end fittings. Internally of the housing, a screen chamber is separated from a flow meter chamber by a screen support hub with flow diversion passages. The screen chamber confines a conically formed screen mesh for passing substantially all flow through the housing. The flow meter chamber has conically tapered walls that support radial fins projecting from the walls inwardly to a cylindrical void that confines the metering ball to displacement along the housing axis. A spring bearing against the metering ball resiliently biases the ball toward the flow restriction passage and against the fluid flow direction. The spring bias and conically tapered meter walls cooperate with the flow stream and metering ball to stabilize at a position along the housing axis that is proportional to the flow rate through the screen.