The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 19, 1988
Filed:
Nov. 04, 1986
Louis P Rossigno, Granger, IN (US);
Robert F Shellhamer, Rochester, MI (US);
Gregory K Harrison, South Bend, IN (US);
Allied Corporation, Morristown, NJ (US);
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 sufficient axial rigidity to hold a backing plate (70) against a force transmitting shoulder (88) on the hub (38). Leading (64) and trailing (72) edges and sealing rings (78, 80) engage the hub (38) within the groove (36) to seal the first chamber (18) from the second (20) chamber.