US3751175A - Portable line boring bar assembly - Google Patents US3751175A - Portable line boring bar assembly - Google Patents Portable line boring bar assembly Info Publication number US3751175A US3751175A US3751175DA US3751175A US 3751175 A US3751175 A US 3751175A US 3751175D A US3751175D A US 3751175DA US 3751175 A US3751175 A US 3751175A Authority US Grant status Grant Patent type Prior art keywords bar bores block boring bar boring Prior art date 1970-11-05 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Inventor D Brooks Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) PORTA TOOL Inc Original Assignee PORTA TOOL Inc Priority date (The priority date is an assumption and is not a legal conclusion.

1. Porta Tool Counterbore Tool
2. Vw Tools Special Tools

Porta Tool Counterbore Tool

United States Patent 1 Brooks 1 Aug. Hindi old songs remix. 7, 1973 PORTABLE LINE BORING BAR ASSEMBLY 75 Inventor: DarylG.

Vw Tools Special Tools

Brooks, Fresno, Calif. 73 Assignee: Porta-Tool Incorporated, Clovis, Calif. 22 Filed: Nov. 5, 1970 21 Appl. No.: 87,178 52 US. 408/72, 408/80 51 Int. Cl B23b 41/12 58 Field of Search 408/36, 80, 81, 54, 56 References Cited UNITED STATES PATENTS 2,651,221 9/1953 Foster 408/72 2,416,402 2/1947 Mitchell 408/72 X 2,413,5 Mitchell 408/54 X 2,401,838 6/1946 Mitchell t t 408/72 X 1,748,876 2/1930 Green 408/72 FOREIGN PATENTS OR APPLICATIONS 19,181 7/1912 Great Britain 408/81 985,173 3/1965 Great Britain 408/81 Primary Examiner-Francis S.