Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1998-06-01
2000-01-25
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
605471, 60583, 405282, E02D 500, E02D 1704
Patent
active
060171707
ABSTRACT:
A pneumatic/hydraulic shoring strut is disclosed for bracing walls in various situations. The shoring strut is provided with features that allow it to be infinitely adjustable and self-locking. In a preferred embodiment, the strut contains an internal biasing member that urges contraction when pneumatic pressure is released. More particularly, the pneumatic/hydraulic shoring strut of the present invention is composed of an inner and outer cylinder which form an annular recess therebetween. The cylinders are mounted in first and second caps and an annular drive piston is positioned within the annular recess, creating first and second chambers. A port for injecting air into the first chamber is mounted on the outer cylinder and hydraulic fluid is sealed in the second chamber. A channel is provided in one of the caps providing fluid communication between the second chamber and an interior cavity located within the inner cylinder where a working piston is reciprocatingly mounted. The channel has a unidirectional flow control valve and a releasable flow restriction control mounted therein thereby facilitating the self-locking feature of the strut.
REFERENCES:
patent: Re30185 (1980-01-01), Griswold
patent: 3598207 (1971-08-01), Hartel
patent: 3791151 (1974-02-01), Plank
patent: 3851856 (1974-12-01), Berg
patent: 3902326 (1975-09-01), Langenbach, Jr.
patent: 4268926 (1981-05-01), Roxton
patent: 4508201 (1985-04-01), Axthammer et al.
patent: 4531611 (1985-07-01), Curiel
patent: 4577840 (1986-03-01), Meller et al.
patent: 4682914 (1987-07-01), Aihara et al.
patent: 4685253 (1987-08-01), Bitterly
patent: 4750568 (1988-06-01), Roxton
patent: 4787781 (1988-11-01), Bradberry
patent: 4919441 (1990-04-01), Marier et al.
patent: 5113710 (1992-05-01), Wolfbauer, III
patent: 5127634 (1992-07-01), Le Gourveller
patent: 5222759 (1993-06-01), Wanner et al.
patent: 5232312 (1993-08-01), Jennings et al.
patent: 5472071 (1995-12-01), Zimmermann
patent: 5499890 (1996-03-01), Kishi
patent: 5547211 (1996-08-01), Runkel
patent: 5560581 (1996-10-01), Cassone
patent: 5579875 (1996-12-01), Vargas
patent: 5613580 (1997-03-01), Young
patent: 5624105 (1997-04-01), Runkel
patent: 5650230 (1997-07-01), Huang et al.
O'Connell, "Collapse Search and Rescue Operations: Tactics and Procedures," Fire Engineering, Mar. 1994.
American Rescue Technologies, Inc.
Taylor Dennis L.
LandOfFree
Adjustable self locking shoring strut does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable self locking shoring strut, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable self locking shoring strut will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2311973