Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Reexamination Certificate
2006-10-03
2006-10-03
Singh, Sunil (Department: 3673)
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
C248S354400
Reexamination Certificate
active
07114888
ABSTRACT:
A yieldable prop having a first end and a second end including a first hollow conduit, a second conduit slidably received in the first hollow conduit, a clamp assembly positioned adjacent to the first hollow conduit and the second conduit, a ring positioned around the first hollow conduit, and at least one handle connected to the first hollow conduit and the ring. The clamp assembly includes a housing and a wedge. The prop further includes a bearing plate positioned at the first end of the yieldable prop, wherein the bearing plate is selected from a shape comprising planar and volcano.
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Kolk Maschinenbau GmbH, “PINK—AS” brochure, undated.
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Oldsen John G.
Stankus John C.
Jennmar Corporation
Singh Sunil
The Webb Law Firm
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