| 摘要 |
A new baseball practice tee and a method of assembling it, in which two different configurations can be employed to allow for various types of practice. The practice tee has a lower assembly that is common to both configurations. In this assembly, a metal tube having a rubber sleeve is mounted on a base. The standard includes a rubber cover having a cavity housing a weighted metal base that has a protrusion for attaching the tube, sleeve, and the rubber cover and metal standard. A locking pin extending through aligned holes in the protrusion and the metal tube attaches the tube to the metal standard, and holds the rubber cover in place. An upper post or a sleeve is inserted into the lower assembly to configure the novel tee as either a tethered or an upright tee, selectively. The upper post and the sleeve are interchangeable and both are adjustable. Configuration as an upright practice tee is made by inserting an adjustable sleeve, which may be made of a rubber material, into the lower post. The adjustable sleeve is held at a desired height by a friction fit, and is adjusted by moving it within the tube. The tethered configuration is made by inserting an upper post, which can be made of plastic, into the lower post. An arm extends perpendicularly from the upper part of the upper post, and tethers a ball by a cord. The upper post has several adjusting holes through which an adjusting pin secures it to the lower post and sleeve arrangement on the lower tee assembly.
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