Door opener assist device

  • US 6,711,856 B1
  • Filed: 09/19/2002
  • Issued: 03/30/2004
  • Est. Priority Date: 09/19/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A door opening assist device, comprising:

  • a cylindrical piston having a threaded bore;

    a helical spring;

    a cylindrical housing having a housing bore adapted to slidingly receive the spring and the piston; and

    a threaded bolt having a head, the piston retaining the spring within the housing at a first end of the housing, the threaded bolt passing within the spring and engaging the threaded bore of the piston from an opposite second end of the housing, the piston retained within the housing by the cooperative engagement between the spring urging the piston out of the first end and the head of the bolt in abutment with the second end, the piston adjustably extending from the first end of the housing a predetermined distance by the cooperative engagement between the bolt and the threaded bore.

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