(19)
(11) EP 0 272 120 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.10.1989 Bulletin 1989/41

(43) Date of publication A2:
22.06.1988 Bulletin 1988/25

(21) Application number: 87311126.4

(22) Date of filing: 17.12.1987
(51) International Patent Classification (IPC)4: B25B 1/10, B30B 1/20, B25B 5/10
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 17.12.1986 GB 8630148
19.12.1986 US 943773
01.09.1987 GB 8720518

(71) Applicant: Yang, Tai-Her
Si-Hu Town Dzan-Hwa (TW)

(72) Inventor:
  • Yang, Tai-Her
    Si-Hu Town Dzan-Hwa (TW)

(74) Representative: Arthur, Bryan Edward et al
Withers & Rogers 4 Dyer's Buildings Holborn
London EC1N 2JT
London EC1N 2JT (GB)


(56) References cited: : 
   
       


    (54) Clamping or pressing devices


    (57) The screw (104) of a clamping or pressing device, such as a vice or press, passes through a sleeve (111) carrying a thread of different pitch, and engages one (102) of the parts of the device directly and the other (103) via the sleeve, so that the relative movement of the parts of the device is the sum of those due to the sleeve and the screw when they are rotated separately. Using a coarse pitch for the screw and a fine pitch for the sleeve thread, or vice versa, allows rapid initial movement together with high clamping force.
    The invention is applicable to presses and to various types of vice. A vice according to the invention may be provided with an additional clamp for holding a pipe or rod vertically.







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