公开(公告)号：US3228450A

公开(公告)日：1966-01-11

申请号：US25764563

申请日：1963-02-11

Applicant: LITTLE INC A

Inventor： MCCULLOUGH JOHN E

IPC: F23D11/04

CPC classification number: F23D11/04

公开(公告)号：US3275059A

公开(公告)日：1966-09-27

申请号：US45439365

申请日：1965-05-10

Applicant: LITTLE INC A

Inventor： MCCULLOUGH JOHN E

IPC: F23D11/34 ,  H02N2/00

CPC classification number: F23D11/345

公开(公告)号：US3924977A

公开(公告)日：1975-12-09

申请号：US40891273

申请日：1973-10-23

Applicant: LITTLE INC A

Inventor： MCCULLOUGH JOHN E

IPC: F04C2/02 ,  F01C1/02 ,  F01C21/00 ,  F03C2/02 ,  F04C18/02 ,  F04C23/00 ,  F04C1/02

CPC classification number: F01C1/0215 ,  F01C21/003 ,  F04C23/008 ,  F04C2250/10 ,  F05B2250/50

Abstract: A positive fluid displacement apparatus employing scroll members having interfitting spiroidal wraps angularly and radially offset such that as the spiral centers experience an orbiting motion, they define one or more moving fluid pockets of variable volume. The zones of lowest and highest pressure are connected to fluid ports. Radial sealing is accomplished with minimum wear by linking the orbiting scroll member to the driving mechanism through a radially compliant mechanical linking means which also incorporates means to counteract at least a fraction of the centrifugal force exerted by the orbiting of the orbiting scroll member. If essentially all of the centrifugal force is counteracted, then the compliant mechanical linking means is designed to supply the necessary radial sealing force. Coupling means, which are separate from the driving means, and hence from the radial constraining force, are provided to maintain the desired angular relationship between scroll members and to provide one opposing force for axial sealing. The other opposing axial sealing force is a combination of biasing means and fluid pressure. The apparatus may serve as a compressor, expander or pump.

公开(公告)号：US3884599A

公开(公告)日：1975-05-20

申请号：US36890773

申请日：1973-06-11

Applicant: LITTLE INC A

Inventor： YOUNG NIELS O ,  MCCULLOUGH JOHN E

IPC: F01C1/02 ,  F01C21/00 ,  F04C23/00

CPC classification number: F01C1/0215 ,  F01C21/003 ,  F04C23/008 ,  F04C2250/10 ,  F05B2250/50

Abstract: A positive fluid displacement apparatus employing scroll members having interfitting spiroidal wraps angularly and radially offset such that as the spiral centers experience an orbiting motion, they define one or more moving fluid pockets of variable volume. The zones of lowest and highest pressures are connected to fluid ports. Radial sealing is accomplished with minimum wear by using a driving mechanism which provides a centripetal radial force adapted to oppose a fraction of the centrifugal force acting on the orbiting scroll member. The line contact sealing force between the wraps of the scroll members constitutes the sole radial constraining force. Coupling means which are separate from the driving means, and hence from the radial constraining means, are provided to maintain the desired angular relationship between scroll members. Axial sealing is attained by withdrawing a portion of fluid from the zone of highest pressure and using this high-pressure fluid to generate axial sealing forces. The apparatus may serve as a compressor, expander or pump.