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:
Feb. 06, 1990
Filed:
Aug. 01, 1988
Applicant:
Inventor:
Owen R Thompson, Louisville, KY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23Q / ;
U.S. Cl.
CPC ...
173 12 ; 81463 ; 81470 ;
Abstract
Method and apparatus for tightening rotatable fastener elements including a source of pressurized fluid, a first rotatable actuator having a rotatable output shaft operable in response to fluid flow through the first actuator, first control to allow the first actuator shaft to operate to a first fluid pressure established by the pressure of the source of pressurized fluid, switching device operable in response to the attainment of the first fluid pressure, to supply pressurized fluid to a second rotating actuator device connected to operate the output shaft through a portion of a rotation in response to the attainment of the first pressure to secure the fastener to a selected torque.