| 摘要 |
Three congruent prongs ( 16 A, 16 B, 16 C) mounted on a shaft tube ( 12 ), converges simultaneously when an operating sleeve ( 14 ) moves forward. This action, along with their notches and shape provides a firm grip for holding and starting nuts and bolts. These prongs, made out of 304 grade stailess steel bands, provide good spring-like flexibility and rigidity. The concave sides of the prongs mate with the outside surface of the shaft tube ( 12 ) every time the operating sleeve ( 14 ) is moved forward. These physical features provide consistent alignment of the prongs every time the tool is used. With rubber sealant ( 16 D) coated on the inside surface of the prongs, the nut and bolt starter gives a firm grip to hold and start a wide variety of shapes and sizes of screws, nuts and bolts. Additional uses of this tool are done with the prop rod ( 20 ) supplementing the prongs. More versatility of this instrument is derived from the prop rod ( 20 ) using nuts of the same thread pattern to position flat washers and lock washers into their threaded studs. Furthermore, the socket extension receiver ( 30 ) provides a convenient extra-reach supplement whenever needed.
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