| US 7,555,846 B1 | ||
| Wheeled distance measuring device | ||
| Cheng Lin Wang, No. 19, Tonro Street, Tonro Tsuen, Tonro Hsiang, Miauli 36641 (Taiwan) | ||
| Filed on Feb. 11, 2008, as Appl. No. 12/69,498. | ||
| Int. Cl. G01B 3/12 (2006.01) | ||
| U.S. Cl. 33—772 [33/779; 33/782] | 10 Claims |
| 1. A wheeled distance measuring device comprising:
a longitudinal pole including a first segment and a second segment,
a coupling device including a housing having a bore formed therein for receiving and engaging with said first segment,
a latch device pivotally attached to said housing and including a latch extended therefrom,
a casing including a bore formed therein for receiving and engaging with said second segment, and said casing being pivotally
attached to said housing with a pivot shaft to allow said first and said second segments of said longitudinal pole to be folded
relative to each other, and
a lock device pivotally attached to said casing with a pivot member to allow said lock device to be pivotally attached to
said casing, and said lock device including a catch extended therefrom for selectively engaging with said latch of said latch
device and for detachably securing said first and said second segments of said longitudinal pole together, said catch being
extended from a first end portion of said lock device, and a spring member being engaged between said casing and a second
end portion of said lock device for biasing said catch of said lock device to engage with said latch of said latch device.
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