Arrangement for a grease pump

• US 3,212,684 A
• Filed: 06/15/1964
• Issued: 10/19/1965
• Est. Priority Date: 07/03/1963
• Status: Expired due to Term

• Current Assignee: Adolf Igelstrom Sven, Eric-Gustaf Wiren, Ingvar Svensson Bengt Gustaf
• Original Assignee: Adolf Igelstrom Sven, Eric-Gustaf Wiren, Ingvar Svensson Bengt Gustaf
• Inventors: INGVAR SVENSSON BENGT GUSTAF, ADOLF IGELSTROM SVEN, ERIC-GUSTAF WIREN
• Application Number:
  US04/375,125
• Time in Patent Office: 491 Days
• US Class Current: 222/326
• CPC Class Codes: B05C 17/00576 characterised by the construction of a piston as pressure exerting means, or of the co-operating container
• CPC Class Codes: B05C 17/0136 comprising an energy storing element, e.g. a spring, for exerting, e.g. when released, pressure on the material B05C17/015 takes precedence
• CPC Class Codes: F16N 3/12 Grease guns

Claims

1. A GREASE GUN COMPRISING A CYLINDRICAL CASING, A SLEEVE OF RESILIENT ELASTIC MATERIAL SLIDABLY MOUNTED IN THE CASIONG FOR FORCING THE GREASE THROUGH THE CASING AND THROUGH A GREASE CARTRIDGE INSERTED IN THE CASING, AND A SPRING LOADED PISTON ROD ADAPTED TO SUPPORT THE SLEEVE, SAID SLEEVE COMPRISING A SUBSTANTIALLY CUP-SHAPED INTEGRAL PACKING COLLAR HAVING A CIRCULAR BOTTOM PLATE WITH A CENTER HOLE THROUGH WHICH THE PISTON ROD SEALINGLY EXTENDS AND AN ANNULAR FNAGE PROJECTING THEREFROM IN THE FEEDIONG DIRECTION OF THE SLEEVE, THE INNER SURFACE OF THE SLEEVE BEING SUBSTANTIALLY CYLINDRICAL AND THE OUTER SURFACE OF SAID FLANGE HAVING A FIRST FLAT FRUSTO CONICAL PORTION WITH ITS NARROW END ADJACENT TO SAID BOTTOM PLATE ANT ITS WIDER END ENGAGING THE CASING AND THE CARTRIDGE AND A SECOND FLAT FRUSTON CONICAL PORTION WITH ITS WIDER END CONNECTED TO THE WIDER END OF SAID FIRST FRUSTO CONICAL PORTION AND ITS NARROW END SEPARATED FROM THE CASING AND CARTRIDGE, THUS RENDERING THE SLEEVE CAPABLE OF PENETRATING SEALINGLY BOTH INTO THE PUMP CASING AND INTO THE GREASE CARTRIDGE INSERTED THEREIN.