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:
Jan. 27, 1981
Filed:
May. 10, 1979
Frank E Keske, Chillicothe, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
PCT No. PCT/US79/00312 Sec. 371 Date May 10, 1979 Sec. 102(e) Date May 10, 1979, PCT Filed May 10, 1979. Bolts (11) are used to assemble a cylinder head and an engine block. The bolts (11) must be torqued to a preload tension. The tension often decays or relaxes after a time, thus reducing the firm fastening which is desired. A fastening tool (10,10a) of this invention provides for the efficient and closely controlled imposition of a predetermined tension on a stud (13) while simultaneously applying a torque to a nut (15) to rotate and tighten it to maintain such tension. The fastening tool (10,10a) comprises a housing (18,18a) having a fluid-actuated piston (24,24a) reciprocally mounted therein. The piston (24,24a) is adapted for threaded attachment with the stud (13) to imposed a predetermined tension thereon.