Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1979-05-10
1981-01-27
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
B25B 2902
Patent
active
042468108
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.
REFERENCES:
patent: 4020720 (1977-05-01), Fujii
patent: 4104934 (1978-08-01), Raschke et al.
Caterpillar Tractor Co.
Jones Jr. James L.
LandOfFree
Tool for pre-tensioning a fastener does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tool for pre-tensioning a fastener, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tool for pre-tensioning a fastener will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1175593