Abstract A flexible diaphragm for a pressure recording instrument or the like which is provided with an annular groove around its periphery to define a resilient shoulder. The diaphragm is mounted in a coupling member which communicates with the instrument and is snapped into detachable securement over a projection or shoulder of the coupling member, which fits into the annular groove. The groove may carry an O-ring or similar compressible seal to effect a sealing engagement between the seat of the groove and the inserted shoulder, or the O-ring seal may be compressed against the coupling member by some peripheral portion of the diaphragm, such as a peripheral shoulder. Another sealing area may be provided by the abutment between the walls of the groove and the inserted shoulder of the coupling. Still another sealing area is provided by a marginal portion of the diaphragm which is compressed between the instrument coupling or flange member and another coupling or flange member is fastened thereto and which communicates with a process line.
Inventors
👤 John R Zavoda
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-02 03:38
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/0007; G01L19/0046
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
In a diaphragm assembly for a recording instrument, the combination of a coupling member having a cavity in communication with the instrument, an annular projection of said coupling member extending inwardly into said cavity, a self-retaining pressure-responsive diaphragm having a peripheral annular groove in the general plane thereof and defining an undercut yieldable shoulder element, said projection being receivable in said groove by deformation of said yieldable shoulder element for releasably securing said diaphragm in said cavity, and a compressible seal for said cavity carried in said diaphragm groove and engaging said projection on said coupling member.
Claim 2
Dependent Claim
97 words
In a diaphragm assembly for a recording instrument, the combination of a coupling member having a cavity in communication with the instrument, an annular projection of said coupling member extending inwardly into said cavity, a self-retaining pressure-responsive diaphragm having a peripheral annular groove in the general plane thereof and defining an undercut yieldable shoulder element, said projection being receivable in said groove by deformation of said yieldable shoulder element for releasably securing said diaphragm in said cavity, and a compressible seal for said cavity carried in said diaphragm groove and engaging said projection on said coupling member.
Claim 3
Dependent Claim
30 words
A combination as defined in claim 1, wherein said yieldable shoulder element impresses a compressive force on said compressible seal in the direction of the general plane of said diaphragm.
Claim 4
Dependent Claim
28 words
A combination as defined in claim 1, wherein said projection is in sealing engagement with the walls of said groove to effect a secondary seal for said cavity.
Claim 5
Dependent Claim
57 words
A combination as defined in claim 1, including a second coupling member secured in face-to-face relationship with said first-named coupling member and defining a second cavity on that side of said diaphragm opposite to said first-named cavity, and a second compressible seal comprising a marginal portion of said diaphragm disposed in compressible relationship between said coupling members.