(19)
(11) EP 0 084 215 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
04.01.1984 Bulletin 1984/01

(43) Date of publication A2:
27.07.1983 Bulletin 1983/30

(21) Application number: 82305235

(22) Date of filing: 01.10.1982
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 02.10.1981 GB 8129861

(71) Applicant: J.H. FENNER & CO. LIMITED
 ()

(72) Inventor:
  • Garrard, John Edward
     ()

   


(54) Improvements in or relating to control of pneumatic motors


(57) A control unit for the remote control of a pneumatic motor main valve, the unit having a spool which controls the connection of an output connection to a main supply connection or to exhaust. ln order to provide an improved response over the entire movement range of the valve a fixed orifice is provided between the main supply connection (21) and the output connection (23) and a variable orifice is provided between the output connection (23) and exhaust. The fixed and variable orifices are formed by parallel (15) and tapered (13) portions respectively on the spool.






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