Removal tool for locking nut, bolt and clip systems and assemblies

{
  "publication_number": "US6988431B2",
  "country": "US",
  "kind": "B2",
  "title": "Removal tool for locking nut, bolt and clip systems and assemblies",
  "abstract": "The removal tool is used in connection with a locking nut and bolt system. The bolt thread has a plurality of notches generally longitudinally spaced in a predetermined pattern. The locking unit or element carries one or more tines. The tine has a distal tine end adapted to latch onto the lock face of the notch on the bolt and, when the distal tine end is not disposed in one or more notches, the tine end moves on the bolt thread crest. When the distal tine end is in the notch or notches, the lock face of the notch prevents counter-rotational movement of the bolt with respect to the nut when the distal tine end abuts the lock face. The locking unit supports the tine and may be cylindrical, rectangular or on a perpendicular support face normal to a radial plane through the axial centerline of the nut thread. The locking unit may be on a nut insert or may be carried on the leg of a U, J or S-shaped clip. The removal tool includes abase with a plurality of prongs insertible into the locking unit or element to keep the tine away from the bolt notches.",
  "claims": [
    "1. A removal tool and locking nut and bolt combination comprising: a bolt with a bolt thread having a plurality of notches on said bolt thread; a nut with a nut thread about a nut bore having an axial centerline, said nut thread complementary to said bolt thread; a locking element operatively associated with said nut and having a locking element bore coaxial with respect to said axial centerline, said locking element including an elongated tine with a proximal tine body portion attached to said locking element and a distal tine end protruding inward toward said axial centerline and adapted to ride on said bolt thread and fall into at least one of said plurality of notches dependent upon a relative position of said distal tine end and said plurality of notches; and a removal tool including a body with first and second ends, said first end configured and dimensioned to be received within said locking element bore and including a number of prongs, wherein each prong is located intermediate said proximal tine body portion of said elongated tine and said bolt thread upon insertion of said first end in said locking element bore such that rotation of said body lifts said distal tine end away from said plurality of notches.",
    "2. A combination as claimed in claim 1 wherein said locking element is carried on said nut.",
    "3. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said body has a cylindrical shape.",
    "4. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said first end of said body includes a plurality of cut-outs defining said prongs.",
    "5. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said second end of said body is coupled to a head plate.",
    "6. A removal tool and locking nut and bolt combination as claimed in claim 1 wherein said body has a cylindrical shape and said head plate has a diameter larger than said second end diameter."
  ],
  "description_excerpt": "U.S. Pat. No. 307,722 to Klemroth discloses a bolt A with longitudinal channel D running through the crest of the threads. The nut has a tine extending above a flat end surface of the nut. The tine pops into and out of channel D. U.S. Pat. No. 591,062 to Smith discloses a bolt with a longitudinal channel which enables a chisel to be placed in a slot in a nut block and further to stop rotation of the bolt with respect to the block. U.S. Pat. No. 1,088,892 to Foreman discloses a screw with a longitudinal channel extending through the threads of the bolt. The tine is located outside of the nut threads. U.S. Pat. No. 1,136,310 to Burnett discloses small notches cut in the top of the crest of the bolt threads. The notches define radially aligned surfaces. A flexible tine in the interior of the nut moves in and out of the small notches. The tine is inserted in a tangential cavity in the nut. U.S. Pat. No. 1,211,194 to Lang discloses what appears to be a bolt with longitudinal channels on its threads. A sheet steel spring is wrapped around an exterior portion of the nut and a portion of the spring is generally radially inserted through the nut to lock into the bolt channels. U.S. Pat. No. 1,226,143 to Stubblefield et al. discloses a bolt with longitudinal channels having a somewhat radial surface and an angularly disposed surface. The nut has an annular groove or recess on one end face thereof. A semi-circular member fits within the groove. One end of the semi-circular member defines a tangentially oriented tine that pops into and out of the bolt channels.",
  "cpc": [
    "C07C 213/10",
    "C07C 227/34",
    "C07C 269/08",
    "C07D 207/16",
    "F16B 39/32",
    "Y10S 411/95",
    "Y10S 411/951"
  ],
  "ipc": [
    "B25B 13/48",
    "C07C 213/10",
    "C07C 215/60",
    "C07C 217/30",
    "C07C 227/34",
    "C07C 229/08",
    "C07C 269/08",
    "C07C 271/22",
    "C07D 207/16",
    "F16B 39/32"
  ],
  "assignees": [
    "PERMANENT TECHNOLOGIES"
  ],
  "inventors": [
    "DISTASIO ROBERT J"
  ],
  "filing_date": "2001-12-12",
  "publication_date": "2006-01-24",
  "grant_date": "2006-01-24",
  "priority_date": "1996-04-10",
  "application_number": "US-1540801-A",
  "family_id": "27486469",
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}