Plastic and nonmetallic article shaping or treating: processes – Forming stressed concrete articles
Patent
1993-05-03
1994-08-30
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Forming stressed concrete articles
522236, 254 29A, 264 35, 264229, 264279, 2642791, E04C 326, E04C 508
Patent
active
053425685
ABSTRACT:
A method for introducing a prestress into a concrete member includes the steps of passing a steel rod (2) through a hollow steel rod (1), applying a tensile force to the hollow steel rod (1), while using the steel rod (2) as a reaction support member, placing concrete (4) around the hollow prestressed steel rod (1), and hardening the concrete (4). The apparatus includes a flat bearing support plate that abuts the concrete to be prestressed, a jack and ram, a rigid support member for interconnecting the jack and ram to the bearing support plate, and a holding cylinder positioned between the bearing support plate and the jack and ram. The bearing support plate and a leading end of the holding cylinder are apertured and screw threadedly receive the threaded trailing end of a hollow steel rod. The trailing end of the steel rod is screw threadedly received by the trailing end of the holding cylinder. When the ram retracts, the hollow steel rod is tensioned between the bearing support plate and the leading end of the holding cylinder.
REFERENCES:
patent: 2328033 (1943-08-01), Schorer
patent: 2378584 (1945-06-01), Schorer
patent: 2761649 (1956-09-01), Woolcock
patent: 2871554 (1959-02-01), Siegfried
patent: 3084909 (1963-04-01), Carr
patent: 3559275 (1971-02-01), Slater
patent: 3833706 (1974-09-01), Edwards
patent: 3993419 (1976-11-01), Mori et al.
patent: 4245923 (1981-01-01), Rieve
patent: 4862376 (1989-09-01), Lu
Abe Minoru
Aftergut Karen
Mason, Jr. Joseph C.
Oriental Construction Company
Smith Ronald E.
LandOfFree
Method for prestressing concrete does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for prestressing concrete, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for prestressing concrete will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-28140