Manhole casting setting fixture
US5328294A · kind A · utility
Inventor
Key dates
| Filing date | Nov 1, 1991 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Nov 1, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D29/1445
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A manhole casting setting fixture includes a pair of spaced parallel frame rails connected by a plurality of transverse struts. Four loop handles are secured at opposite ends of the frame rails to facilitate manual manipulation and transportation of the fixture. A pair of clamp mounting blocks are positioned in juxtaposed relation centrally on bottom surfaces of the frame rails. A pair of lead screws extend through respective threaded coaxial bores in the mounting blocks and include handle portions to facilitate manual loosening and tightening of the lead screws. A pair of arcuate clamping jaws are rotatably mounted on oppositely directed end portions of the lead screws. In use, a manhole casting is positioned level with the bottom surfaces of the parallel frame rails and the clamping screws are manually adjusted to engage the arcuate clamping jaws with diametrically opposed interior side wall portions of the manhole casting, thereby clamping the casting into proper level alignment with respect to the parallel frame rails. The setting fixture and attached manhole casting are then carried to the manhole and properly positioned relative thereto. The setting fixture maintains the manh…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.