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Self aligning stuffing box for pumpjacks

  • US 6,412,783 B1
  • Filed: 09/26/2000
  • Issued: 07/02/2002
  • Est. Priority Date: 09/28/1999
  • Status: Expired due to Term
First Claim
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1. A self aligning stuffing box for pumpjacks, comprising:

  • a first tubular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the interior surface at the second end having internal stops;

    a second tubular body having a first end, a second end, an exterior surface and an interior surface defining an interior bore, the first end having a concave contact surface, the second tubular body being telescopically received within the first tubular body with the first end of the second tubular body precluded from withdrawal from the second end of the first tubular body by the internal stops;

    an annular body disposed within the interior bore of the first tubular body, the annular body having a first end and a second end, the second end having a convex contact surface which engages the concave contact surface of the second tubular body;

    a third tubular body having a first end, a second end, an exterior surface, and an interior surface defining an interior bore, the second end of the third tubular body being telescopically received in the first tubular body and exerting a compressive force upon the annular body to maintain the convex contact surface of the annular body engaged with the concave contact surface of the second tubular body;

    at least one tubular packing housing having a first end, a second end, an exterior surface and an interior surface defining a packing chamber which is adapted to receive packing, one of the first end and the second end of the tubular packing housing being coupled with one of the second end of the second tubular member and the first end of the third tubular member.

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