Hermetic assembly arrangement for a current conducting pin passing through a housing wall

• US 5,227,587 A
• Filed: 05/13/1991
• Issued: 07/13/1993
• Est. Priority Date: 05/13/1991
• Status: Expired due to Term

• Current Assignee: Emerson Electric Company
• Original Assignee: Emerson Electric Company
• Inventors: Paterek, F. Dieter
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): SOUGH, HYUNG SUB
• Application Number:
  US07/698,954
• Time in Patent Office: 792 Days
• Field of Search: 174/152 R, 174/151, 174/152 GM, 174/153 R, 174/152 E, 174/152 S, 174/65 SS, 174/65 G, 174/65 R, 174/50.61, 439/736, 439/935
• US Class Current: 174/152.0GM
• CPC Class Codes: H01B 17/305 by embedding in glass or ceramic material

Abstract

A hermetic terminal assembly arrangement for an opening extending through a wall housing panel wherein the opening periphery is threaded to adjustably receive an externally threaded annular sleeve through which a current conducting pin extends, the terminal assembly arrangement including a first seal between the pin and annular sleeve and a second compressible seal between the sleeve and housing.

Claims

1. A hermetic assembly for a walled machine housing for a compressor unit and a control unit disposed in said machine housing comprising:

a machine housing with a wall housing panel opening in a wall of said machine housing;

a separate unitary panel removably mountable on the wall of said machine housing to sealingly cover said wall housing panel opening, said unitary panel having at least one pin assembly opening means and at least one current conducting pin assembly means extending therethrough;

internal thread means surroundingly extending along the inner peripheral surface of said pin assembly opening means;

said current conducting pin assembly means including an externally threaded annular flanged sleeve means adjustably engaging with said internal thread means of said pin assembly opening means, said externally threaded annular flanged sleeve means including an inner peripheral wall;

a single current conducting pin extending longitudinally through said inner peripheral wall of said externally threaded annular flanged sleeve means in spaced relation to said inner peripheral wall of said externally threaded annular flanged sleeve means;

a first fused sealing means cooperatively disposed between said single current conducting pin and said inner peripheral wall of said externally threaded annular flanged sleeve means; and

a second sealing means including a compressible seal cooperatively disposed in a closeable recess configuration between the flange of said externally threaded flanged sleeve means and said pin assembly opening means to provide a tightly compressed seal therebetween when said externally threaded sleeve means is in full threaded engagement with said pin assembly opening means so that said first and second sealing means tightly seal said current conducting pin assembly means with said pin assembly opening means in said separate unitary panel.

2. The hermetic assembly of claim 1, said first fused sealing means comprising a glass seal.

3. The hermetic assembly of claim 1, said first fused sealing means comprising a glass seal abuttingly extending and fused between the outer peripheral surface of said single current conducting pin and said inner peripheral wall of said externally threaded annular flanged sleeve means.

4. The hermetic assembly of claim 1, further comprising an annular insulating second sleeve disposed between said single current conducting pin and said inner peripheral wall of said externally threaded annular flanged sleeve means too engage in sealing relation with said first fused sealing means.

5. The hermetic assembly of claim 1, said second compressible seal being in the form of a compressible rubber O-ring.

6. The hermetic assembly of claim 1, said externally threaded annular flanged sleeve means being of stainless steel.

7. The hermetic assembly of claim 1, said externally threaded annular flanged sleeve means being of an insulating ceramic material.

8. The hermetic assembly of claim 1, further comprising a third sealing means including an insulating annular second sleeve disposed between and in abutting contact with said single current conduction pin, and said internal peripheral wall of said externally threaded annular flanged sleeve means and said first fused sealing means to be in sealed contact therewith.

9. A hermetic assembly for a walled machine housing for a compressor unit and a control unit disposed in said housing comprising:

a machine housing with a wall housing panel opening in a wall of said machine housing;

a separate unitary wall panel removably mounted on the wall of said machine housing sized and configured to sealingly cover said wall housing panel opening, said unitary panel having a plurality of appropriately sized larger and smaller pin openings therein extending between opposed faces of said panel with each of said larger and smaller openings being provided with internal threads extending along the inner peripheral surface thereof from opposite faces of said panel;

a plurality of appropriately sized larger and smaller externally threaded annular stainless steel sleeve members for each of said larger and smaller openings respectively, each of said sleeve member being of a length substantially equivalent to the length of said opening and being adjustably engagable with said internal threads of one of said matchingly sized openings, each of said externally threaded annular sleeve including an annular shoulder configured with respect to said correspondingly matching opening to provide a closeable recess with a groove surrounding said corresponding opening along the outer face of said unitary wall panel;

a plurality of appropriately sized larger and smaller compressible rubber O-rings, each disposed in a correspondingly sized recess to seal the space therebetween;

a plurality of current conducting pins of larger and smaller diameter extending longitudinally along the central longitudinal axis of each of said larger and smaller externally threaded annular sleeve respectively, each being in spaced relation from the inner peripheral surface of the annular sleeve with which it is associated;

a plurality of glass seals, one for each of said externally threaded larger and smaller annular sleeve extending in fused relation between the outer peripheral surface of each said pins and the internal peripheral surface of said externally threaded annular sleeve with which it is associated;

a pair of insulating annular ceramic sleeves for each of said larger externally threaded sleeves, each pair of said insulating ceramic sleeves being disposed in mirror-image relation on opposed faces of said glass seal in fused embedded sealed relation therewith, with the outer peripheral surface of each insulating ceramic sleeve abutting the inner peripheral wall of the externally threaded sleeve with which it is associated and the inner peripheral wall of each insulating ceramic sleeve abutting the outer peripheral surface of the current conducting pin disposed along the longitudinal central axis of the associated externally threaded annular sleeve; and

,

a plurality of longitudinally extending plastic protective annular sleeve members each snugly engaging and protected the inner portion of said smaller current conducting pins.