VENT PLUG FOR A FILLING OPENING OF A CELL OF AN ELECTRIC STORAGE BATTERY

• US 3,664,879 A
• Filed: 08/24/1970
• Issued: 05/23/1972
• Est. Priority Date: 09/12/1969
• Status: Expired due to Term

• Current Assignee: Bertil Lennart Olsson
• Original Assignee: Bertil Lennart Olsson
• Inventors: Olsson, Bertil Lennart
• Primary Examiner(s): Walton, Donald L.
• Application Number:
  US05/066,495
• Time in Patent Office: 638 Days
• Field of Search: 136/162,177,182 73/327
• US Class Current: 429/89
• CPC Class Codes: H01M 10/484 for measuring electrolyte level, electrolyte density or electrolyte conductivity
• CPC Class Codes: H01M 50/308 Detachable arrangements, e.g. detachable vent plugs or plug systems
• CPC Class Codes: H01M 50/627 Filling ports
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A vent plug for an automobile type battery is provided with both a means to add electrolyte without removing the plug and a light transmitting rod that is immersed in the electrolyte to show the proper level without removing the vent plug as the filling progresses.

Claims

1. A removable vent plug for filling an opening of a cell of an electric storage battery containing liquid electrolyte comprising in combination, an indicator for displaying exterior to the cell the level of electrolyte in the cell, housing means through which the indicator extends for attaching said vent plug in the opening of said cell, said housing means and indicator forming two separate channels in the vent plug each with openings leading from the interior of the cell, a cover positioned on said housing means and provided with two openings, one of said openings in the cover leading into one of said channels to permit addition of electrolyte to the cell without removing the vent plug while viewing the electrolyte level on said indicator and the other opening in said cover leading into the other channel to permit unrestricted passage of air from the interior of the cell as said electrolyte is added.