• US 4,744,428 A
  • Filed: 09/29/1986
  • Issued: 05/17/1988
  • Est. Priority Date: 09/29/1986
  • Status: Expired due to Term
First Claim
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1. A lightweight portable scale comprising a base, a beam having a substance holder at one end thereof and a scale extending toward the opposite end thereof, a sliding weight movably carried by said beam for movement along said scale, a pair of metallic fulcrum posts projecting upwardly from said base, and a pair of metallic bearing inserts in said beam for cooperation with said fulcrum posts, one pair of the pair of posts or the pair of inserts having pointed projections thereon receivable in tapered recesses in the other pair for positioning and pivotally supporting said beam, said sliding weight being movable from a zero position to a position near the said opposite end of the beam and said sliding weight when in its zero position having a portion thereof disposed substantially in an imaginary plane containing the fulcrum of the beam, whereby to minimize the weight of the substance holder required to balance the beam when the sliding weight is in its zero position.

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