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US 4,050,975 AGranted
O-ring splicing fixture
AssigneeB.W. Darrah, Inc.
InventorA. Peter Draffone
Life of this patent
Estimating the term…
Abstract
A fixture for use in preparing replacement O-rings from cord material, such as buna-N. The fixture automatically provides mating ends which when spliced together preclude undue stress along the plane of splicing.
Claims10
An O-ring splicing fixture for use in preparing replacement O-rings from flexible cord material,
- said fixture comprising:
- a base unit having a horizontal plane surface;
- spiral means on said plane surface for use in conforming said cord material to said spiral shape;
- slicing means on said spiral means to enable slicing said cord material at selected points along said spiral;
- said slicing means located on said spiral to define a diametral plane for trimming the ends of the O-ring cord material such that when the ends are joined together the O-ring will form a perfect circle with uniform cross-sectional stress through the entire circumference of the O-ring.
2 more elements
The method of fabricating O-rings from flexible cord material comprising steps of:
- cutting the desired cord material to a length slightly larger than the circumference of the O-ring required;
- forming a spiral of the cut cord material;
- keeping the spiral formed cut cord material in a single plane thereby conforming the cord material at the ends to the arcuate shape determined by the desired finished O-ring;
- cutting the spiral formed cord material along the diametral plane at a point on the spiral where its arcuate shape conforms to the arcuate shape determined by the desired finished O-ring to form one end;
- repositioning the cut cord materials into the spiral with the other end at the point in the spiral so that its arcuate shape conforms to the shape of the finished O-ring;
- trimming the other end along the diametral plane at the same point on the spiral;
- and
- bonding the one end and the other end together to complete the O-ring forming a perfect circle with uniform cross-sectional stress.
5 more elements
Dependencies are inferred from the claim text.