Paul F Fitzpatrick

US Patent:

41876440, Feb 12, 1980

Filed:

Jun 26, 1978

Appl. No.:

5/919198

Inventors:

Paul Fitzpatrick - Southfield MI

Assignee:

Ex-Cell-O Corporation - Troy MI

International Classification:

B24B 508

US Classification:

51 34D

Abstract:

A multiple spindle honing machine of the disclosure includes automatically controlled feed cylinders for initially expanding honing tools driven by the spindles and also includes a constant rate feed mechanism that continues to expand the tools after the initial expansion actuated by the feed cylinders. Each spindle includes a connector that extends between one of the feed cylinders and its associated honing tool. Mechanical locks respectively lock first threaded members of the connectors after the initial tool expansion. Second threaded members of the connectors are unthreaded from the first members thereof by an actuating member, preferably embodied by the gear rack, of the constant rate feed mechanism so as to continue the tool expansion and completion of honing operation. Electrical and hydraulic circuits control operation of the pressure feed cylinders, the constant rate feed mechanism, and the mechanical locks. Each honing tool is automatically contracted independently of the other tools after the bore being machined thereby reaches the required size and, after all of the tools are contracted, the feed cylinders may be actuated to re-expand the tools for a finishing operation.

US Patent:

41999037, Apr 29, 1980

Filed:

Apr 19, 1978

Appl. No.:

5/897626

Inventors:

Paul Fitzpatrick - Southfield MI

Assignee:

Ex-Cell-O Corporation - Troy MI

International Classification:

B24D 900

US Classification:

51339

Abstract:

An abrading tool (20, 20a, 20b) is disclosed as having a tapered arbor (22) and an abrasive insert 24 including a helical element (28) with a plurality of coils (30) that receive the arbor in an axially incompressibly mounted relationship. An abrasive strip (32) of a helical shape on the coils performs a machining operation upon tool rotation. The abrasive strip on each coil is spaced from the abrasive strip on adjacent coils. Nuts (40, 44, 46) threaded on the arbor provide a means for adjustably positioning the abrasive insert axially along the arbor to control the diameter of each coil in order to initially size the insert and to subsequently compensate for wear of the abrasive strip. Different embodiments disclosed include a helical spacer (34, 36) which spaces the coils of the helical element, coils which are directly engaged with each other and define a helical groove (64) that receives a spacer (66) located between the abrasive strip on each coil, and passages (56, 58, 60, 62) through the arbor and the insert for feeding fluid to the abrasive strip.

US Patent:

41738527, Nov 13, 1979

Filed:

Jun 8, 1978

Appl. No.:

5/913612

Inventors:

Paul Fitzpatrick - Southfield MI

Assignee:

Ex-Cell-O Corporation - Troy MI

International Classification:

B24B 500

US Classification:

51355

Abstract:

A rotatable cutting tool (10) of the disclosure includes an expandable cutting section (40) and a leading end having an expandable pilot (16) for properly aligning the tool during use. The trailing end of the tool preferably also has an expandable pilot (18) for aligning the tool during movement back through a bore which has been machined. A unitary body (20) of the tool has a helical slot (24) extending axially therethrough and has an inner tapered surface (26) for mounting the tool on a tapered arbor (12) such that movement therealong by nuts (34, 36, 38) engaged with axial end surfaces of the pilots controls the size of the cutting section and the pilots. The expandable tool construction is particularly adaptable for abrasion tools and is disclosed with abrasive particles (22) secured to the cutting section.