Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material
Patent
1998-03-10
2000-05-30
Lopez, F. Daniel
Expansible chamber devices
Collapsible chamber wall portion
Wall portion formed of flexible material
92 96, F01B 1904, F16J 302
Patent
active
060678933
ABSTRACT:
The present invention provides a diaphragm having a generally truncated conical body for use in diaphragm actuating piston assemblies, such diaphragm comprising at least one layer of an elastomeric material selected from a group consisting of natural rubber, synthetic rubber, fabric reinforced rubber and mixtures thereof. There is further a first central opening, having a first predetermined diameter, disposed at a first edge of such diaphragm for mounting on a diaphragm actuating piston, such first central opening being formed by a bead like portion having a second predetermined diameter. There is further included a second central opening, having a third predetermined diameter, disposed at a second edge of such diaphragm for mounting on a body portion of such diaphragm actuating piston assembly, such second central opening being formed by a bead like portion having a fourth predetermined diameter. Such diaphragm has a generally flexure annular portion, connected at a first end to such bead-like portion at such first central opening and at a second end to such bead-like portion at such second central opening, incorporating a predetermined plurality of annular thick portions and annular thin portions of such elastomeric material, such annular thick portions alternating with such annular thin portions throughout a working length of such diaphragm.
REFERENCES:
patent: 2545857 (1951-03-01), Perkins et al.
patent: 3212446 (1965-10-01), Golden et al.
patent: 4270441 (1981-06-01), Tuck
patent: 5220863 (1993-06-01), Scott et al.
patent: 5699717 (1997-12-01), Reidlinger
Lopez F. Daniel
Westinghouse Air Brake Company
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