Joseph M Lucas

US Patent:

39705382, Jul 20, 1976

Filed:

Mar 19, 1975

Appl. No.:

5/559749

Inventors:

Joseph G. Lucas - Trumbull CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

C25F 302
C25F 314
C25F 700

US Classification:

204224M

Abstract:

Apparatus is described which enables close tolerance electro-chemical milling of the leading and trailing edges of blades used in gas turbine engines. Using turbine blades formed with the edges slightly oversize in the as-cast condition, electro-chemical milling is used to properly shape the leading and trailing edges. The apparatus comprises an insulated body having a slot shaped to accept the turbine blade. The two outer edges of the slot are fitted with lengthwise slotted metallic tubing which receives the edges of a blade and which forms a channel for a supply of electrolyte for milling the blade edges. Means are provided for accurately positioning the blade within the body.

US Patent:

41429540, Mar 6, 1979

Filed:

Apr 14, 1978

Appl. No.:

5/896558

Inventors:

Joseph G. Lucas - Trumbull CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

C25F 500
C25F 700

US Classification:

204146

Abstract:

Electrolytic process and apparatus employs the shroud and depending blades as anodes about a multi-cathode device in a bond material solutionizing electrolyte for obtaining proper contour smoothness without structural depletion of the shroud and/or blades.

US Patent:

40253619, May 24, 1977

Filed:

Sep 4, 1975

Appl. No.:

5/610494

Inventors:

Joseph G. Lucas - Trumbull CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

B22D 2900

US Classification:

134 28

Abstract:

Ceramic shell molds are removed from cast turbine blades by contacting the shell mold with a concentrated solution of HF whereby the binder of the shell is destroyed and the shell material falls away from the metal casting.