Improved structure of a quick-connect pipe fitting
US5320326A · kind A · utility
Inventors
Key dates
| Filing date | Jun 11, 1993 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Jun 11, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L37/35
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved structure of a quick-connect pipe fitting, and particularly a structure for a quick-connect pipe fitting used to connect a pressure pipe or a hydraulic tubing in a system comprises a compression member on top of a lock washer such that the compression member is fitted and secured in a base. When a pressure pipe is inserted into the pipe fitting, the compression member is screwed on but remains loose. In disconnecting the pressure pipe, the compression member is pushed downward, against the lock washer so as to disengage the inner teeth thereof from the pipe. The pressure pipe is no longer locked and may be pulled out easily. In addition, the quick-connect pipe fitting may include a connecting member which is used to install an air valve. Such air valve comprises a seal ring, a vent valve having vent holes, a connecting base and a spring. When the pressure pipe is inserted into the pipe fitting, it pushes the vent valve down such that the vent holes are opened and the fitting body allows air to flow therethrough. The spring normally pushes against the vent valve such that the vent holes are closed by the seal ring to form an air-tight seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.