James Patrick Mackey

US Patent:

6837760, Jan 4, 2005

Filed:

May 24, 2002

Appl. No.:

10/155669

Inventors:

James Clyde Mackey - Bainbridge Island WA, US

International Classification:

B23P 1502

US Classification:

440 49, 440 50, 416223 R, 298896

Abstract:

The present invention is directed to a method of altering the pitch of a propeller through localized bending of its blades. To alter the propeller's pitch the camber of at least one of its blades is changed by bending a portion of a trailing edge, a leading edge, or both edges relative to a remainder of the blade. A bent portion can be located away from a tip of the blade at a distance that is less than or substantially equal to 60% of a radius of the blade, and bending preferably commences at a distance in from an edge of a blade of up to 50% of a section width of the blade. The maximum preferable change in pitch at any location on the radius due to bending is 30%.

US Patent:

53158563, May 31, 1994

Filed:

Aug 7, 1992

Appl. No.:

7/926835

Inventors:

James C. Mackey - Bainbridge Island WA

Assignee:

Lips Propellers, Inc. - Chesapeake VA

International Classification:

B21D 501

US Classification:

72389

Abstract:

An apparatus for straightening a propeller has an arbor press with two opposed inner surfaces. The opposed surfaces are spaced apart a sufficient distance to allow a propeller to fit between them with one opposed surface extending beyond the second opposed surface. Two pads are mounted on the first inner surface to support the propeller during the straightening procedure. One or both of the pads may be adjustable to more precisely locate the points of pressure that will be applied to the propeller to straighten it. A ram is mounted on the second inner surface to apply pressure to the propeller. A reinforcing ridge may be attached to the outer surface of the arbor press to provide rigidity during the propeller straightening procedure. To allow precision manipulation of the device under water, a floatation collar is fixed to the arbor press or the reinforcing ridge. The floatation has sufficient buoyancy to counteract the weight of the apparatus when under water.

US Patent:

53775210, Jan 3, 1995

Filed:

Mar 8, 1994

Appl. No.:

8/207589

Inventors:

James C. Mackey - Seattle WA

Assignee:

Lips Propellers, Inc. - Chesapeake VA

International Classification:

B21D 501

US Classification:

72374

Abstract:

A method of using an apparatus for straightening a propeller having an arbor press with two opposed inner surfaces. The opposed surfaces are spaced apart a sufficient distance to allow a propeller to fit between them with one opposed surface extending beyond the second opposed surface. Two pads are mounted on the first inner surface to support the propeller during the straightening procedure. One or both of the pads may be adjustable to more precisely locate the points of pressure that will be applied to the propeller to straighten it. A ram is mounted on the second inner surface to apply pressure to the propeller. A reinforcing ridge may be attached to the outer surface of the arbor press to provide rigidity during the propeller straightening procedure. To allow precision manipulation of the device under water, a floatation collar is fixed to the arbor press or the reinforcing ridge. The floatation has sufficient buoyancy to counteract the weight of the apparatus when under water.