Back to results
US 6,223,446 B1Granted
Grade/level measuring device
OwnerMark A. Potterinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerMark A. Potterinventor
Estimating the term…
The present invention provides a small, simple and easy-to-use elevation checking and measuring device that can also be used to measure points to the same level as a known point. The invention comprises a primary housing and secondary casing which contain tape measuring blades. The primary housing has opposing sidewalls each of which may include a vertical slot. The slots are designed to mate with projections extending from the secondary casing. The slots and projections provide alternative angular orientations of the housing and casing when connected together. The primary housing contains level indicators to determine when it is held level. It also includes a light source that illuminates a target at the end of the primary housing blade. Maintaining the beam on the target while using the level indicators to achieve a horizontal orientation of the primary assembly, thereby permits a user to make quick and accurate grade or height measurements with the tape measure blades.
A measuring system comprising:
A grade/level measuring device, comprising:
A primary tape measure assembly comprising:
The combination of a primary tape measure assembly that is releasably engaged to a secondary tape measure assembly, said primary tape measure assembly comprising a housing having a longitudinal axis and a vertical axis perpendicular to said longitudinal axis, said housing including a light source that emits a light beam in a direction parallel to said longitudinal axis and a level indicator means for determining the horizontal alignment of said longitudinal axis;
Dependencies are inferred from the claim text.