Diaphragm for a servomotor
US4738186A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Nov 4, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01B19/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A diaphragm (32) for a servomotor which separates the interior of first (12) and second (14) shells into first (18) and second (20) chambers. The diaphragm (32) has an external bead (30) with first rib (31) having first (40) and second (42) sealing surfaces and an annular projection (46) extending therefrom which engages the rear shell (14) or divider (15) to guide the first (40) and second (42) sealing surfaces into contact with corresponding surfaces on the first (12) and second (14) shells. When the first (12) shell is connected to the second (14) shell, the projection (46) is compressed into the first rib (31) while a portion (33, 35) of the first rib (31) expands into cavities (37, 39) on both sides of the annular projection (46) to develop internal resiliency that uniformly acts on the first (40) and second (42) sealing surfaces. The diaphragm (32) has an internal bead (34) with a second rib (56) that snaps into a groove (36) on the hub (38) located in the servomotor. The internal bead (34) has a rib (56) with a flange (82) thereon. The flange (82) has a scalloped surface (84) which allows the rib (56) to expand radially and be positioned in the groove (36) while providing su…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.