Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1996-01-29
1997-06-17
Dombroske, George M.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73790, 73 81, G01N 308
Patent
active
056399693
ABSTRACT:
A portable ball testing device for testing inflated sport balls such as tennis balls, racquet balls and the like that includes a tubular element with an entrance port and an exit port that are sized to enable the a ball to be placed within and removed from the respective ports of the tubular element. A restricted region is disposed within the tubular element between the entrance port and the exit port. A ramrod element is provided that extends into the tubular element. A ram head is provided at the end of the ramrod element within the tubular element. As the ramrod element is advanced into the tubular element, the ram head abuts against the ball and pushes the ball through the restricted region. A handle is coupled to the ramrod element via a spring. When a manual force is applied to the handle, the spring compresses and the force is transferred to the ramrod element by the spring. A gauge is provided between the handle and the ramrod element that provides a visual indication as to the compression experienced by the spring. A threshold level is indicated on the gauge that indicated whether or not the force needed to advance the ball through the restricted region surpasses a predetermined threshold.
REFERENCES:
patent: 2628496 (1953-02-01), Wick
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patent: 3665757 (1972-05-01), Hoag
patent: 4313289 (1982-02-01), Birdsong, Jr.
patent: 4876658 (1989-10-01), Hass
patent: 5222391 (1993-06-01), Reenstra
patent: 5245862 (1993-09-01), Zeiss
patent: 5291774 (1994-03-01), Putman
patent: 5511410 (1996-04-01), Sherts
Dombroske George M.
Noori Max H.
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