Reed valves for internal combustion engines

Claim 2

A two-cycle engine comprising a cylinder, a piston working in the cylinder, the engine having a compression chamber below the piston, a fuel intake system including a ported valve seat for delivering fuel into the compression chamber, the cylinder having an exhaust port and a transfer passage for delivering compressed fuel from the compression chamber to the space above the piston, and a reed valve overlying the port in the valve seat and adapted to flex away from the ported seat during the upward stroke of the piston, the reed valve being of multiple layer construction with an outlet layer formed of relatively rigid resin material and an inner layer presented inwardly for contact with the valve seat and formed of relatively flexible temperature-resistant synthetic rubber material, the rubber layer being thinner than the resin layer and the resin and rubber layers being adhesively bonded to each other.

Claim 3

A reed valve adapted to overlie a ported fuel intake valve seat, the reed valve being of multiple layer construction and comprising a layer of buna-N rubber adapted to contact the valve seat and an overlying layer of resin material, the layer of resin material being thicker than the rubber layer and the resin material being selected from the group consisting of glass reinforced epoxy, phenolic, melamine and silicone resin materials, said layers being adhesively bonded to each other.

Claim 4

A reed valve adapted to overlie a ported fuel intake valve seat, the reed valve being of multiple layer construction and comprising a layer of buna-N rubber adapted to contact the valve seat and an overlying layer of resin material, the layer of resin material being thicker than the rubber layer and the resin material being selected from the group consisting of glass reinforced epoxy, phenolic, melamine and silicone resin materials, said layers being adhesively bonded to each other.

Claim 5

A reed valve adapted to overlie a ported fuel intake valve seat, the reed valve comprising a layer of glass reinforced epoxy resin material and a layer of rubber material selected from the group consisting of buna-N rubber, urethane rubber, silicone rubber and neoprene rubber, the layer of a glass reinforced resin material being at least two times the thickness of the rubber layer, and said layers being adhesively bonded to each other, with the rubber layer presented toward the valve seat and with the layer of resin material presented outwardly away from the valve seat.

Claim 6

A reed valve adapted to overlie a ported fuel intake valve seat, the reed valve comprising a layer of glass reinforced epoxy resin material and a layer of rubber material selected from the group consisting of buna-N rubber, urethane rubber, silicone rubber and neoprene rubber, the layer of a glass reinforced resin material being at least two times the thickness of the rubber layer, and said layers being adhesively bonded to each other, with the rubber layer presented toward the valve seat and with the layer of resin material presented outwardly away from the valve seat.

Claim 7

A reed valve adapted to overlie a ported fuel intake valve seat in a flow passage and adapted to open or close the valve port according to the direction of flow in the flow passage, the reed valve being of multiple layer construction and comprising a layer of rubber material adapted to contact the valve seat and an overlying layer of resin material, the rubber layer being resilient and being thinner than and having greater yieldability than the resin layer and the resin layer being thicker than and having greater stiffness than the rubber layer and providing for opening and closing of the valve port according to the direction of flow in the flow passage.

Claim 8

A reed valve adapted to overlie a ported fuel intake valve seat in a flow passage and adapted to open or close the valve port according to the direction of flow in the flow passage, the reed valve being of multiple layer construction and comprising a layer of rubber material adapted to contact the valve seat and an overlying layer of resin material, the rubber layer being resilient and being thinner than and having greater yieldability than the resin layer and the resin layer being thicker than and having greater stiffness than the rubber layer and providing for opening and closing of the valve port according to the direction of flow in the flow passage.

Claim 9

A reed valve as defined in claim 4 in which the rubber layer comprises a preformed film of buna-N rubber and in which said preformed film is bonded to the resin layer by an intervening layer of adhesive material.

Claim 10

A reed valve as defined in claim 4 in which the rubber layer comprises silicone rubber adhesively bonded to the resin layer.

Claim 11

A two-cycle engine comprising a plurality of cylinders, a piston working in each cylinder, the engine having a compression chamber below each piston, a fuel intake system for each cylinder including a ported valve seat for delivering fuel into the compression chamber, the engine having an exhaust duct and each cylinder having an exhaust port communicating with said duct, and a transfer passage for each cylinder for delivering compressed fuel from its compression chamber to the space above the piston, and a reed valve overlying the port in the valve seat for each cylinder and adapted to flex away from the ported seat during the upward stroke of the piston in that cylnder, each reed valve being of multiple layer construction with an outer layer formed of relatively rigid resin material of thickness from about 0.017" to about 0.030" and an inner layer presented inwardly for contact with the valve seat and formed of a layer of relatively flexible rubber material of thickness of from about 0.002" to about 0.014", the resin and rubber layers being adhesively bonded to each other.

Claim 12

A two-cycle engine comprising a plurality of cylinders, a piston working in each cylinder, the engine having a compression chamber below each piston, a fuel intake system for each cylinder including a ported valve seat for delivering fuel into the compression chamber, the engine having an exhaust duct and each cylinder having an exhaust port communicating with said duct, and a transfer passage for each cylinder for delivering compressed fuel from its compression chamber to the space above the piston, and a reed valve overlying the port in the valve seat for each cylinder and adapted to flex away from the ported seat during the upward stroke of the piston in that cylnder, each reed valve being of multiple layer construction with an outer layer formed of relatively rigid resin material of thickness from about 0.017" to about 0.030" and an inner layer presented inwardly for contact with the valve seat and formed of a layer of relatively flexible rubber material of thickness of from about 0.002" to about 0.014", the resin and rubber layers being adhesively bonded to each other.

Claim 13

A multi-cylinder, two cycle engine comprising a plurality of cylinders, a piston working in each cylinder, each cylinder of the engine having a compression chamber below the piston, a fuel intake system including a ported valve seat for each cylinder for delivering fuel into its compression chamber, the cylinders having exhaust ports delivering exhaust gases to a common exhaust duct, and a transfer passage for each cylinder delivering compressed fuel from the compression chamber to the space above the piston, and for each cylinder a reed valve overlying the port in the valve seat and adapted to flex away from the ported seat during the upward stroke of the piston, the reed valve being of multiple layer construction with an outer layer formed of epoxy resin material and a thinner coating layer presented toward the valve seat and formed of buna-N rubber material, the epoxy and rubber layers being adhesively bonded to each other.

Claim 14

A multi-cylinder, two cycle engine comprising a plurality of cylinders, a piston working in each cylinder, each cylinder of the engine having a compression chamber below the piston, a fuel intake system including a ported valve seat for each cylinder for delivering fuel into its compression chamber, the cylinders having exhaust ports delivering exhaust gases to a common exhaust duct, and a transfer passage for each cylinder delivering compressed fuel from the compression chamber to the space above the piston, and for each cylinder a reed valve overlying the port in the valve seat and adapted to flex away from the ported seat during the upward stroke of the piston, the reed valve being of multiple layer construction with an outer layer formed of epoxy resin material and a thinner coating layer presented toward the valve seat and formed of buna-N rubber material, the epoxy and rubber layers being adhesively bonded to each other.

Claim 15

A reed valve assembly comprising a primary reed adapted to overlie a ported fuel intake valve seat, the primary reed having a port therethrough, and a secondary reed overlying the port in the primary reed, at least one of said reeds being of multiple layer construction and comprising a layer of relatively flexible rubber material and a layer of an epoxy resin material adhesively bonded to each other, the epoxy resin layer being thicker than the rubber layer, and the reed valve being positioned with the rubber layer at the side presented toward the underlying valve port.

Claim 16

A reed valve assembly comprising a primary reed adapted to overlie a ported fuel intake valve seat, the primary reed having a port therethrough, and a secondary reed overlying the port in the primary reed, at least one of said reeds being of multiple layer construction and comprising a layer of relatively flexible rubber material and a layer of an epoxy resin material adhesively bonded to each other, the epoxy resin layer being thicker than the rubber layer, and the reed valve being positioned with the rubber layer at the side presented toward the underlying valve port.