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Valve closing device and method for providing a valve closing device

  • US 10,060,545 B2
  • Filed: 05/15/2015
  • Issued: 08/28/2018
  • Est. Priority Date: 06/28/2014
  • Status: Active Grant
First Claim
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1. A method for keeping ready a fitting closing device (4), wherein the fitting closing device (4) has an input shaft (5) and an output shaft (6), which is coupled to the input shaft (5), and an electrically operable emergency drive (7, 8) with which the output shaft (6) is drivable outside normal operation, wherein the emergency drive (7, 8) is fed from at least two energy storage units (10, 11, 18) which are separate from one another, the energy storage units (10, 11, 18) each have at least one rechargeable battery (19, 20), and the method comprising operating at least one said rechargeable battery (19, 20) in a trickle charging cycle while operating a further said rechargeable battery (19, 20) in a maintenance charging cycle, and, when one said rechargeable battery (19, 20) is operated in the maintenance charging cycle, electronically blocking operation in the maintenance charging cycle for all further said rechargeable batteries (19, 20) of at least one of the associated energy storage unit (10, 11, 18) or the fitting closing device (4).

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