Ralph S Hebbert

US Patent:

6761532, Jul 13, 2004

Filed:

Mar 14, 2002

Appl. No.:

10/097731

Inventors:

Christopher D. Capone - Pittsburgh PA
Ruey C. Dempsey - Greensburg PA
Marlin S. Heilman - Sarver PA
Steve A. Kolenik - Leechburg PA
Daniel R. Moore - Gibsonia PA
Carl M. Parisi - Kittanning PA
Edward K. Prem - Allison Park PA
Richard A. Sofranko - Pittsburgh PA
David C. Borzelleca - Wexford PA
Greg Burgreen - Bakerstown PA
John A. Holmes - Wexford PA
Zhongjun Wu - Wexford PA
Ralph Scott Hebbert - Wexford PA
James Antaki - Allison Park PA

Assignee:

Vascor, Inc. - Pittsburgh PA

International Classification:

F04D 700

US Classification:

415900, 415200, 416170 R, 417 50

Abstract:

A blood pump having rotor and/or stator touch down zones to prevent pump failure or hemolysis which can occur if the rotor comes into contact with the stator due to power failure or mechanical shock. The touch down zones can include forming, or coating, portions of adjacent surfaces of the stator and rotor which can come into contact if a rotor touch down occurs. The materials used to form or coat the touch down zones can have properties which ensure that no consequential damage to the contacting surfaces occurs.

US Patent:

20040228724, Nov 18, 2004

Filed:

May 19, 2004

Appl. No.:

10/848898

Inventors:

Christopher Capone - Pittsburgh PA, US
Ruey Dempsey - Greensburg PA, US
Marlin Heilman - Sarver PA, US
Steve Kolenik - Leechburg PA, US
Daniel Moore - Gibsonia PA, US
Carl Parisi - Kittanning PA, US
Edward Prem - Allison Park PA, US
Richard Sofranko - Pittsburgh PA, US
David Borzelleca - Wexford PA, US
Greg Burgreen - Bakerstown PA, US
John Holmes - Wexford PA, US
Zhongjun Wu - Wexford PA, US
Ralph Hebbert - Wexford PA, US
James Antaki - Allison Park PA, US

International Classification:

F01D001/02

US Classification:

415/200000

Abstract:

A blood pump having rotor and/or stator touch down zones to prevent pump failure or hernolysis which can occur if the rotor comes into contact with the stator due to power failure or mechanical shock. The touch down zones can include forming, or coating, portions of adjacent surfaces of the stator and rotor which can come into contact if a rotor touch down occurs. The materials used to form or coat the touch down zones can have properties which ensure that no consequential damage to the contacting surfaces occurs.

US Patent:

49758918, Dec 4, 1990

Filed:

Feb 13, 1970

Appl. No.:

5/014830

Inventors:

William C. Wineland - Silver Spring MD
Ralph S. Hebbert - Silver Spring MD
Edward H. Hug - McLean VA

Assignee:

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

International Classification:

H04B 106

US Classification:

367136

Abstract:

A land vehicle sensing device includes a geophone for detecting vibratory gnals and a bandpass amplifier for limiting the electrical output of the geophone to those signals indicative of land vehicles. A real-time frequency analyzer provides a normalized power density spectrum signal which is threshold detected and averaged to provide an indication of land vehicle intrusion.