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EP0122722A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Axial sealing device for a scroll type fluid displacement apparatus

Assignee: Sanden Corp
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Filing: 1984-03-15
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Granted: —
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Expires: 2004-03-15
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Abstract

Abstract A scroll type fluid displacement apparatus is disclosed having a pair of scroll members (25, 26) each comprising an end plate (251, 261) and a spiral wrap (252, 262) extending from one side of the end plate (251, 261). The spiral wraps interfit at an angularand radial offsetto make a plurality of line contacts to define et least one pair of sealed off fluid pockets. At least one of the scroll members has a discharge port or fluid hole (258) at position nearthe center of the spiral element (25) and is provided with an anti-wear plate at its end surface facing the other scroll member. The anti-wear plate (40) is an involute platethat covers those areas of the end surface of the end plate (251) where the spiral wrap (262) of the other scroll member (26) makes contact during the orbital motion of the orbiting scroll member (26). The center portion of the anti-wear plate (40) which is closely placed on the fluid hole (258) has a cut out portion to avoid the contact with or cover up the fluid hole thereby. Therefore, the repeatedly movement of center portion of anti-wear plate by passing fluid flowed through the hole is avoided.

Inventors

  • 👤 Masakatsu Sakaki
  • 👤 Masaharu Hiraga

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 04:55
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/02; F01C1/0207; F01C1/0246; F04; F04C; F04C2240/00; F04C2240/80; F04C2240/801; F04C2250/00; F04C2250/10; F04C2250/102; F05; F05B; F05B2250/00; F05B2250/50; F05B2250/502

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 182 words
In a scroll type fluid displacement apparatus including a pair of scrolls each having an end plate and a spiral wrap extending from one side of said end plate, said spiral wraps interfitting at an angular and radial offset to make a plurality of lines contacts between the spiral curved surfaces which define fluid pockets, and driving means operatively connected to one of said scroll for orbiting said one scroll relative to the other scroll while preventing rotation of said one scroll to thereby change the volume of the fluid pockets, the improvement comprising a fluid hole formed through said end plate of the other scroll at a position near the center of said spiral element of the other scroll, an anti-wear plate disposed on an end surface of said end plate of the other scroll to face the axial end surface of said spiral wrap of one scroll to prevent wear and maintain axial sealing, and said anti-wear plate formed by flat plate and having a cut out portion at the center thereof to take a distance from said fluid hole.
Claim 2
Dependent Claim 182 words
In a scroll type fluid displacement apparatus including a pair of scrolls each having an end plate and a spiral wrap extending from one side of said end plate, said spiral wraps interfitting at an angular and radial offset to make a plurality of lines contacts between the spiral curved surfaces which define fluid pockets, and driving means operatively connected to one of said scroll for orbiting said one scroll relative to the other scroll while preventing rotation of said one scroll to thereby change the volume of the fluid pockets, the improvement comprising a fluid hole formed through said end plate of the other scroll at a position near the center of said spiral element of the other scroll, an anti-wear plate disposed on an end surface of said end plate of the other scroll to face the axial end surface of said spiral wrap of one scroll to prevent wear and maintain axial sealing, and said anti-wear plate formed by flat plate and having a cut out portion at the center thereof to take a distance from said fluid hole.
Claim 3
Dependent Claim 37 words
The apparatus of claim 1 wherein said fluid is formed by circular shaped and said cut out portion of anti-wear plate is formed by arc of circule which is greater than the circle of said fluid hole.
Claim 4
Dependent Claim 28 words
The apparatus of claim 1 wherein said cut out portion of anti-wear plate is formed by straight line which is tangential line of circle of said fluid hole.
Claim 5
Dependent Claim 33 words
The apparatus of claim 1 wherein said cut out portion of anti-wear plate is formed by two arc shaped curves and straight line which is tangential line of circle of said fluid pocket.

References Cited (Backward Citations)

US3986799A Cited
EP0012615A1 Cited

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