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Class Information
Number: 418/255
Name: Rotary expansible chamber devices > Interconnected vanes > Integrally connected > Diametrically aligned
Description: Apparatus in which each of two vanes lies in a common plane passing substantially through the center of the working member.










Patents under this class:
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Patent Number Title Of Patent Date Issued
5009577 Rotary compressor of variable displacement type Apr. 23, 1991
5006053 Vertical single blade rotary pump Apr. 9, 1991
4957420 Vane pump with guide means for regulating movement of vane Sep. 18, 1990
4929159 Variable-displacement rotary compressor May. 29, 1990
4925378 Rotary vane compressor with valve controlled pressure biased sealing means May. 15, 1990
4854279 Three chamber continuous combustion engine Aug. 8, 1989
4759707 Press for the preparation of plastic blanks Jul. 26, 1988
4737090 Movable vane compressor Apr. 12, 1988
4619594 Stackable rotary vane pump with improved volumetric efficiency Oct. 28, 1986
4616984 Sliding-vane rotary compressor with specific cylinder bore profile Oct. 14, 1986
4561837 Method of producing a rotor for rotary slide-vane vacuum pumps, and a rotor produced by said method Dec. 31, 1985
4561834 Rotary vaned pumps with fixed length and shearing knife-edged vanes Dec. 31, 1985
4560332 Rotary vane-type compressor with vanes of more thermally expansible material than rotor for maintaining separation of rotor from housing side plate during high temperature operation Dec. 24, 1985
4526524 Vane compressor Jul. 2, 1985
4484873 Through vane type rotary compressor with specific chamber configuration Nov. 27, 1984
4465445 Rotary pivoted vane pump Aug. 14, 1984
4456441 Rotary machine Jun. 26, 1984
4451220 Rotary compressor with clearance between movable vanes and slits of the rotor May. 29, 1984
4449899 Rotary vane machine May. 22, 1984
4432711 Vane pump with cylinder profile defined by cycloid curves Feb. 21, 1984
4419059 Nonsymmetric bore contour for rotary compressor Dec. 6, 1983
4408968 Rotary compressor Oct. 11, 1983
4385873 Rotary vane type pump or motor and the like with circular chamber portions May. 31, 1983
4384833 Rotary machine of canted vane type having centering ball May. 24, 1983
4373880 Through-vane type rotary compressor with cylinder chamber of improved shape Feb. 15, 1983
4354807 Compressor-expander of the vane type having canted vane cavity Oct. 19, 1982
4295802 Vapor control system Oct. 20, 1981
4221553 Oribital pump with fluid flow control Sep. 9, 1980
4144005 Rotary through vane compressor Mar. 13, 1979
4133617 Vane type pump with optional high rate of flow or high pressure characteristics Jan. 9, 1979
4097205 Orbital pump with inlet and outlet through the rotor Jun. 27, 1978
4025246 Rotary machine with counterweights for interfitted vanes May. 24, 1977
3995977 Vane pump housing Dec. 7, 1976
3988080 Rotary vane compressor with outlet pressure biased lubricant Oct. 26, 1976
3964447 Vane-type rotary internal combustion engine Jun. 22, 1976
3954358 Compressor May. 4, 1976

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