Method for automatically tightening and untightening a bolt

Details Method for automatically tightening and untightening a bolt Method for automatically tightening and untightening a bolt

1993-06-15

1995-03-14

Vo, Peter Dungba

Metal working

Method of mechanical manufacture

Disassembling

29430, 295252, 29781, B23P 1904

Patent

active

053966864

ABSTRACT:
A method and apparatus for automatically tightening and untightening bolts which are assembling and fastening devices for a form used in centrifugal compacting and molding concrete products, in which engaging members are brought into engagement with rotary supports which support the form. A bolt tightening and untightening mechanism is moved with the rotary supports, and the bolts are automatically tightened and untightened during the movement thereof. Engaging members are operated more than a dimensional difference of the rotary supports so that even if dimensions of the rotary supports are different according to the kind of the form, the engaging members can be positively engaged with the rotary supports, or the bolt tightening and untightening mechanism is moved up and down in advance so that a height position thereof becomes a predetermined height with respect to the rotary supports.

REFERENCES:
patent: 1493396 (1924-05-01), Skolfield, Jr.
patent: 3858731 (1975-01-01), Briggs
patent: 4967472 (1990-11-01), Ebihara et al.
patent: 4972569 (1990-11-01), Aoki et al.
Patent Abstract of Japan, vol. 9, No. 316 Dec. 12, 1985; Document No. 60-150920, Aug. 1985.
"Automatic Tightening and Loosening Apparatus"; Document No. 60-150921, Aug. 1985, Tightening and Loosening Apparatus for Tightening Screws.
Patent Abstract of Japan, vol. 13, No. 528 Nov. 24 1989; Document No. 1-216806, Aug. 1989.

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