E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
94/12
E02D 29/12 (2006.01) E02D 29/14 (2006.01) E03F 5/02 (2006.01) E03F 5/06 (2006.01)
Patent
CA 1089275
ABSTRACT OF THE DISCLOSURE A novel method and apparatus for initially supporting a load-bearing access device in a supporting means so that the top of the access device is substantially level with the surrounding road surface and subsequently, when the level of the road surface is to be raised, providing a modified sup- porting means so that when the access device is remounted therein the top of the access device will be substantially level with the raised road surface, which method comprises the steps of: (1) arranging a supporting means in a fixed pos- ition in the roadway, said supporting means comprising in combination: (A) A generally ring-shaped frame member that includes: (a) an upper rim surface that is placed so that it is approximately level with the level of the roadway, (b) an annular shoulder support surface located inwardly and below said upper rim surface and disposed generally par- allel thereto, said shoulder support surface consisting of an outer seating surface and an inner seating surface, and (c) an inner generally vertical side wall interconnecting said upper rim surface and said shoulder support surface, and (B) a generally ring-shaped insert member comprising an upper surface, a lower bearing surface, and two side walls inter- connecting said upper and lower surface, said lower bearing surface of said insert member resting upon said outer seating surface of the said shoulder support surface of said ring- shaped frame member, (2) placing a load-bearing access device in said supporting means so that the lower circumferential rim of said access device rests on said inner seating surface of said annular shoulder surface d said ring-shaped frame abstract (cont'd) member, (3) removing said access device and said ring- shaped insert member when the level of the roadway is to be raised, (4) disposing an extension member on and within said ring-shaped frame member to thereby produce a modified supporting means, said extension member (d) having on its lower side a bearing surface that rests upon and is support- ed by at least said outer seating surface of said shoulder support surface, and (e) having on its upper side a load support surface that approximately corresponds to the area of the inner seating surface of said shoulder support sur- face and is parallel thereto, and (5) replacing said access device in said modified supporting means so that the lower circumferential rim of said access device bears against the said upper side of said extension member. Thus, the raising is accomplished without the need for digging up the framework that supported the cover. This provides an improve technique which is less expensive and quicker than heretofore provided techniques.
297756
Helms William R.
Marcus & Associates
LandOfFree
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