Co-rotational scroll apparatus with improved scroll member biasing

US5129798A · kind A · utility

Assignee

• American Standard Inc. · US

Inventors

• Daniel R. Crum · Huntersville, US
• Peter A. Kotlarek · La Crosse, US
• George W. Brandt · Tyler, US
• Gene Fields · Arkadelphia, US
• Joe T. Hill · Bristol, US
• John R. Williams · Tyler, US
• Robert E. Utter · Kewaunee, US

Key dates

• Filing date: Feb 12, 1991
• Grant date: Jul 14, 1992
• Expiry date: Feb 12, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04C27/005
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In a co-rotational scroll apparatus having two interleaving scroll wraps secured to end plates rotating concurrently about parallel, non-concentric axes to produce a relative orbital motion, a scroll member including an annular biasing chamber formed in one scroll member end plate opposite the scroll wrap and a passage from one of the chambers formed by the scroll wraps for providing fluid to the chamber. The fluid exerts a force upon a pressure plate secured to the opposing scroll end plate and thereby acts to bias the scroll wraps into contact with the opposing scroll end plate. Seals are provided in the biasing chamber of the scroll end plate to ensure contact with the pressure plate of the opposing scroll member.