Concrete pumping swivel coupling apparatus with seal
US4432558A · kind A · utility
Inventors
Key dates
| Filing date | Dec 4, 1981 |
| Grant date | Feb 21, 1984 |
| Priority date | — |
| Expiry date | Dec 4, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L27/082
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A swivel coupling apparatus includes a pair of aligned metal pipe sections having grooved outer ends for connecting to hoses and rigid pipes by releasable clamp units. A gasket is disposed between the smooth end faces and an outer clamp housing encircles the end portions to mechanically connect the pipe sections. The pipe sections have outer shoulders with inclined clamp walls. The clamp housing includes a pair of semi-circular members having bolt clamping lugs for drawing the members onto the shoulders. The members having outer side clamp legs defining a cavity. A central rectangular spacer projects partially into the cavity for location between the outer portion of the end faces. The cavity has annular base walls between the spacer and side legs aligned with and outwardly spaced from the outer peripheral walls of the shoulders. Grease fittings to the opposite sides of the spacer provide for introducing of grease into the free space. The spacer has a smooth inner wall forming a backing for the gasket. The ring gasket is formed with a rectangular outer body and inner flared side lips with a curved base wall on the inner face to define a pressure chamber. The pumped concrete moves i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.