Metal working – Method of mechanical manufacture – Disassembling
Patent
1990-06-28
1991-12-31
Gorski, Joseph M.
Metal working
Method of mechanical manufacture
Disassembling
29446, 295252, B23P 1904
Patent
active
050759507
ABSTRACT:
A multiple jack bolt assembly, wherein a tensioner body component of the assembly, which may take the form of a nut, bolt, thrust collar, and the like, is provided in addition to its plurality of standard jack bolt holes with at least one additional drilled and tapped release hole for receiving a corresponding plurality of release jack bolts. The additional jack bolt hole or holes preferably remain empty during installation and the load cycle of the jack bolt system and it is also preferred that they and the release jack bolts received therein vary in construction from the standard jack bolt holes and jack bolts. When it is desired to remove the multiple jack bolt tensioning device, the release jack bolt holes are first cleaned (if necessary) and lubricated. The release jack bolts are then lubricated, threaded into the release jack bolt holes until their thrust ends contact a hardened washer memory, which is also contacted by the thrust ends of the plurality of standard jack bolts, and is then torqued to an amount at least equal to the installation torque of the immediately adjacent standard jack bolts, thereby relieving the loads thereof. With the release jack bolts in this position, the adjacent jack bolts are broken loose, as well as the remaining standard jack bolts, whereupon the tensioner body component may be released.
REFERENCES:
patent: 3835523 (1974-09-01), Stansfield
patent: 3841193 (1974-10-01), Ito
patent: 3886707 (1975-06-01), Heldt
patent: 4075923 (1978-02-01), Latham
patent: 4182215 (1980-01-01), Green et al.
patent: 4288898 (1981-09-01), Adcock
patent: 4338037 (1982-07-01), Deminski
patent: 4540199 (1985-09-01), Neill
patent: 4622730 (1986-11-01), Steinbock
Dungba Vo Peter
Gorski Joseph M.
Poff Clifford A.
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