The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1988
Filed:
Apr. 11, 1986
Daniel F Dobat, Sterling Heights, MI (US);
Michael D Smith, Troy, MI (US);
The Cross Company, Fraser, MI (US);
Abstract
A tooling assembly (10) is disclosed having a plurality of tool holders (18, 20) for independently driven cutting tools (14, 16), the tooling assembly adapted for automatic insertion and removal from a spindle assembly (12). The plurality of cutting tools (14, 16) are disclosed as arranged to be able to simultaneously machine concentric round features on a workpiece (8), such as a valve stem guide bore (9) and valve seat (7). The tooling assembly (10) includes inner and outer tool bodies (30, 24) rotatably mounted together, each carrying a tool holder (20, 18), the tool bodies (30, 24) rotated at different speeds. A coupling arrangement for the tooling assembly includes an outer draw bar (82) moveable to couple the tooling assembly (10) to the spindle assembly (12), and an inner draw bar (84) separately coupled to moveable element (20) to enable independent axial advance of one of the cutting tools (14) by axial movement of the inner draw bar (84) and coupled moveable element (20).