Yieldable prop having a restraint arrangement

Details Yieldable prop having a restraint arrangement Yieldable prop having a restraint arrangement

2006-10-06

2008-11-04

Singh, Sunil (Department: 3672)

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

C248S354100

Reexamination Certificate

active

07445408

ABSTRACT:
A yieldable prop having a hollow first conduit having a first end and an opposite second end, the first end having a conical-shaped interior surface, with interior diameter decreasing as distance from the second end of the first conduit decreases;a second conduit slidably mounted in the first end of the hollow first conduit;and at least two discrete engaging members in the first end of the hollow conduit, each of the at least two engaging members engaging the conical-shaped interior surface and outer surface of the second conduit to prevent the second conduit from sliding into the hollow first conduit, while providing for movement of the first and second conduits away from one another.

REFERENCES:
patent: 844385 (1907-02-01), Mommertz
patent: 949535 (1910-02-01), Hamm
patent: 1584905 (1926-05-01), Symons
patent: 1890423 (1932-12-01), Teagarden
patent: 2068491 (1937-01-01), Jakoubek et al.
patent: 2192079 (1940-02-01), Hinselmann et al.
patent: 2670170 (1954-02-01), Haarmann
patent: 3089742 (1963-05-01), Powell
patent: 3292892 (1966-12-01), Abbott
patent: 3690608 (1972-09-01), Poizner
patent: 3834174 (1974-09-01), Strumbos
patent: 3870278 (1975-03-01), Lee
patent: 4009855 (1977-03-01), Hoffmann et al.
patent: 4234151 (1980-11-01), John et al.
patent: 4449876 (1984-05-01), Glanton
patent: 4983077 (1991-01-01), Sorge et al.
patent: 5015125 (1991-05-01), Seegmiller
patent: 5051039 (1991-09-01), Heiliger
patent: 5564867 (1996-10-01), Domanski et al.
patent: 5583288 (1996-12-01), Brenner et al.
patent: 5720581 (1998-02-01), Bacon et al.
patent: 5967702 (1999-10-01), Vogelzang
patent: 6234541 (2001-05-01), Wagner et al.
patent: 6409139 (2002-06-01), Du Pree
patent: 6481052 (2002-11-01), Beall
patent: 6571426 (2003-06-01), Chen
patent: 0 245 704 (1987-04-01), None
patent: 2 209 549 (1989-05-01), None
patent: 2 260 559 (1993-04-01), None

Affiliated with

Also associated with

Rating

Yieldable prop having a restraint arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Yieldable prop having a restraint arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Yieldable prop having a restraint arrangement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4035788