Drain-cleaning implement
US4706321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1986 |
| Grant date | Nov 17, 1987 |
| Priority date | — |
| Expiry date | Oct 6, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB08B9/045
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A drain-cleaning implement having a plastic shell of two subshells snapped together using male and female mating means along abutting edges and having a snake coiled within the shell and exerting outward mating force on it. The male means are on projections extending from inwardly-projecting sidewall portions formed at intervals around the inside surface of one subshell, and such inside surface has substantially edge-free transitions between the inwardly-projecting portions and positions therebetween to strengthen the shell with maximum mating force from the snake. Preferred embodiments have corner-free mating means. A stop ledge facilitates proper mounting of a rotatable handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.