| US 7,497,022 B1 | ||
| Plate level | ||
| James Arthur Aarhus, 1462 E. Erie St., Chandler, Ariz. 85225 (US) | ||
| Filed on Mar. 31, 2007, as Appl. No. 11/731,153. | ||
| Claims priority of provisional application 60/789553, filed on Apr. 04, 2006. | ||
| Int. Cl. G01C 9/26 (2006.01) | ||
| U.S. Cl. 33—374 [33/376; 33/809] | 4 Claims |
| 1. An extendible level device extendible between a closed position and a fully open position so that said extendible level
device has a first length in said closed position and a longer length in said fully open position comprising:
one body member,
said body member having a first end and a second end,
said body member having a top and bottom surface,
said body member having two shafts,
said two shafts extending into said first end of said body member,
said two shafts extending completely through said body,
said body member and said two shafts are linear in cross-section,
a first end piece,
level means attached to said body member,
means attached to said first end piece and engaged with said two shafts for slidably attaching said first end piece to said
first end of said body member,
said means for slidably attaching said first end piece to said first end of said body member is two multi-section telescopic
tube assemblies,
one end of each of said two multi-section telescopic tube assemblies being attached to said first end piece, and the other
end of each of said two multi-section telescopic tube assemblies being inserted into each of said two shafts in said first
end of said body member,
said two multi-section telescopic tube assemblies being parallel and in the same plane,
whereby, the effective length of said extendible level device may be varied between said closed position and said fully open
position,
whereby locking devices cooperate with said body member and said two telescopic tube assemblies, so as to cause said body
member and said two telescopic tube assemblies to be secure in a longitudinal direction as well as transverse direction, in
any position of the extendible level device between said closed position and said fully open position.
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