×

Piston door stop

  • US 5,761,766 A
  • Filed: 01/15/1997
  • Issued: 06/09/1998
  • Est. Priority Date: 01/15/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A door stop, comprising:

  • a) an attachment mechanism to secure said door stop to a wall;

    b) a first shaft having a first shaft inner surface, a first shaft outer surface, a first shaft bottom end, a first shaft top end, a first shaft top surface, a first shaft bottom surface, and a first shaft bore extending from the first shaft top surface towards the first shaft bottom surface, the first shaft bottom surface is attached to the attachment mechanism;

    c) a second shaft with a larger diameter than the diameter of the first shaft, said second shaft having a second shaft inner surface, a second shaft outer surface, a second shaft bottom end, a second shaft top end, a second shaft top surface, a second shaft bottom surface, and a second shaft bore extending from the second shaft bottom surface towards the second shaft top surface, the diameter of the second shaft bore is greater than the diameter of the first shaft, the second shaft bottom end envelopes the first shaft top end; and

    d) a spring which is longer than the first shaft having a spring top surface, a spring bottom surface, a spring upper section, and a spring lower section, said spring has a spring winding diameter which is smaller than the diameter of the first shaft bore and smaller than the diameter of the second shaft bore, the spring lower section is located inside the first shaft bore, the spring upper section extends beyond the first shaft top surface and into the second shaft bore, the first shaft, second shaft, and spring are coaxiale) a locking means for locking the second shaft in place after it has traveled a predetermined distance along the first shaft outer surface towards the attachment mechanism, wherein the locking means comprise a catch having a catch deformed portion and a catch hook portion, the catch deformed portion has a catch deformed portion top end and a catch deformed portion bottom end, a catch deformed portion inner surface, a catch deformed portion outer surface, the catch deformed portion inner surface of the catch deformed portion top end is attached to the second shaft outer surface, the catch deformed portion bottom end extends beyond the second shaft bottom surface and said catch deformed portion bottom end is further distant from the second shaft outer surface than the catch deformed portion top end, the catch hook portion has a catch hook portion outer end, a catch hook portion inner end, and has a greater length than the distance between the second shaft outer surface and the second shaft inner surface, the catch hook portion outer end is attached to the catch deformed portion bottom end so that the catch hook portion inner end is forced into a first shaft groove in the first shaft outer surface, said first shaft groove extends along the first shaft outer surface, has a groove top end, and a groove bottom end, the catch hook portion inner end is caught in a slot in the first shaft bottom end directly below the groove bottom end.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×