Static molds – Mold including core and means to remove core
Patent
1992-05-20
1994-03-01
Nguyen, Khanh
Static molds
Mold including core and means to remove core
249146, 249152, 249178, 249180, 249184, 249188, B28B 730
Patent
active
052900061
ABSTRACT:
A lightweight metal or plastic form that when collapsed can be installed on the inside of a temporarily suspended manhole casting and expanded by a mechanism having numerous arms connected at a center point and extending outwardly to spaced and positioned spring encasing brackets that compensate and adjust slightly the pressure that the arms project to the outer walls of a slotted circular shaped form. By a cam effect the handle locks into a over center position that is maintained without the aid of clamps or additional hardware so that the form will stay in position until the user lifts the handle upwardly which removes the device from the manhole and at the same time collapses the form. The inventions primary purpose is to provide a seal between a temporarily blocked up manhole metal casting and the manhole precast concrete riser rings so that cement may be applied around the outside of the manhole and vibrated into position without danger of any cement contaminating or plugging the sewer system. Other features include quick installation and speedy removal along with reusability yielding cost effectiveness.
REFERENCES:
patent: 680273 (1901-08-01), Parker
patent: 767418 (1904-08-01), Miller
patent: 824855 (1906-07-01), Foster et al.
patent: 858638 (1906-09-01), Swenson
patent: 904900 (1907-05-01), Sheets
patent: 946002 (1908-03-01), Blau
patent: 948539 (1908-12-01), Clark
patent: 1007187 (1911-10-01), Cross
patent: 1118630 (1914-11-01), Brawner
patent: 1458145 (1923-06-01), Parsons
patent: 1861801 (1932-07-01), Jury
patent: 2032637 (1936-03-01), Schuster
patent: 3205552 (1965-09-01), Johnson et al.
patent: 3669402 (1972-06-01), Paulon
patent: 3729165 (1973-04-01), Trimple
patent: 3733045 (1973-05-01), Marin
patent: 3734450 (1973-05-01), Lengel
patent: 3749352 (1973-07-01), Khodosh et al.
patent: 3847339 (1974-11-01), Farrell
patent: 4278229 (1981-07-01), Burlett
patent: 4365780 (1982-12-01), Williams
patent: 4685650 (1987-08-01), Ditcher
patent: 4824068 (1989-04-01), Ferland
LandOfFree
Expanding form for pouring mixed cement to reposition manhole ca does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Expanding form for pouring mixed cement to reposition manhole ca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expanding form for pouring mixed cement to reposition manhole ca will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-571380