Road structure – process – or apparatus – Apparatus – Tamper
Reexamination Certificate
2008-08-06
2011-11-15
Pezzuto, Robert (Department: 3671)
Road structure, process, or apparatus
Apparatus
Tamper
Reexamination Certificate
active
08057125
ABSTRACT:
Vibratory percussion rammers and methods of making vibratory percussion rammers are provided. In one example, a vibratory percussion rammer includes a gear box, a percussion delivery unit extending downwardly from the gear box, and one or more slide bearings disposed in the percussion delivery unit between adjacent surfaces of reciprocating metal components. The slide bearings include a sheet of non-metal material that is curved into the shape of a tube having a C-shape in cross section. Slide bearings according to this design can be disposed in the percussion delivery unit to eliminate some or all of the metal-on-metal contact between reciprocating components, including between the ram and shaft assembly, spring box and the guide cylinder, the spring separator and the spring box, and the shaft of a ram and shaft assembly and an upper end of the spring box.
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UK Search Report for corresponding application GB 0911112.1 dated Sep. 3, 2009.
MBW, Inc., Compaction & Concrete Construction Equipment, 2007; Wisconsin Cyberlynk Network Inc.
Andrus Sceales Starke & Sawall LLP
M-B-W Inc.
Pezzuto Robert
Troutman Matthew
LandOfFree
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