Reinforced plastic valve

• US 5,100,103 A
• Filed: 01/28/1991
• Issued: 03/31/1992
• Est. Priority Date: 06/03/1985
• Status: Expired due to Fees

• Current Assignee: PNC Bank National Association (The PNC Financial Services Group, Inc.)
• Original Assignee: Kerotest Manufacturing Corporation (Kerotest Industries, Inc.)
• Inventors: Conley, Richard W., Tremblay, Richard P.
• Primary Examiner(s): Fox, John C.
• Application Number:
  US07/649,227
• Time in Patent Office: 428 Days
• Field of Search: 251/309, 251/358
• US Class Current: 251/309
• CPC Class Codes: F16K 27/065 with cylindrical plugs
• CPC Class Codes: F16K 5/045 Particular coverings and materials

Abstract

A reinforced plastic valve includes a generally cylindrical major body portion which is at least partially formed of a plastic material. The major body portion has an axially extending interior chamber. A pair of flow lines intersect the major body portion and the interior chamber thereof. A plug is mounted in the chamber and is selectively rotatable to control flow of fluid through the flow lines. The major body portion includes a reinforcing sleeve formed of metal which is encased within the plastic major body portion to surround the interior chamber.

Claims

1. A reinforced plastic valve comprising:

a generally cylindrical unitary valve body formed of a molded plastic material having deformable creep properties under pressure, said unitary valve body having a generally cylindrical axially extending interior chamber, said valve body interior chamber having an inner cylindrical wall;

a pair of flow lines extending into said interior chamber of said valve body;

a flow isolation member having valve seats and a generally cylindrical configuration throughout its length, said flow isolation member mounted in said generally cylindrical chamber and rotatably movable to control the flow of fluid through said flow lines;

seal members positioned on said flow isolation member above and below said flow lines in sealing contact with said valve body inner cylindrical wall;

said valve body including a reinforcing member that is stronger than said plastic material forming said valve body, said reinforcing member having deformable creep properties substantially less than the creep properties of said plastic material forming said valve body, said reinforcing member having a generally cylindrical shape with an inner surface and an outer surface, said reinforcing member having a plurality of radially extending apertures at various locations around said reinforcing member, said plastic material forming said valve body extending through said apertures in said reinforcing member and connecting said plastic material forming said valve body on both sides of said reinforcing member;

said reinforcing member preventing creep of said valve body and providing dimensional stability to said valve body to thereby maintain sealing contact between said seal members and said valve body inner cylindrical wall; and

said flow isolation member having at least one radially extending stop means and said reinforcing member having at least one axially extending shoulder, said stop means arranged to abut said valve body adjacent said axially extending shoulder and limit rotation of said flow isolation member, said other portions of said plastic material forming said valve body and extending through said apertures in said reinforcing member preventing rotation of said reinforcing member relative to said valve body when torque is applied to said valve body and said reinforcing member by said flow isolation member stop means.

2. A reinforced plastic valve comprising;

a generally cylindrical unitary valve body formed of a molded plastic material having deformable creep properties under pressure, said unitary valve body having a generally cylindrical axially extending interior chamber, said valve body interior chamber having an inner cylindrical wall;

a pair of flow lines extending into said interior chamber of said valve body;

a flow isolation member having valve seats and a generally cylindrical configuration throughout its length, said flow isolation member mounted in said generally cylindrical chamber and rotatably movable to control the flow of fluid through said flow lines;

seal members positioned on said flow isolation member above and below said flow lines in sealing contact with said valve body inner cylindrical wall;

said valve body including a reinforcing member that is stronger than said plastic material forming said valve body, said reinforcing member having deformable creep properties substantially less than the creep properties of said plastic material forming said valve body, said reinforcing member having a generally cylindrical shape with an inner surface and an outer surface, said reinforcing member having a plurality of radially extending apertures at various locations around said reinforcing member, said reinforcing member embedded during the molding process within said molded plastic forming said valve body and said plastic material forming said valve body extending through said apertures in said reinforcing member and connecting said first portion of said plastic material forming said valve body with said second portion of said plastic material forming said valve body;

said flow isolation member having at least one radially extending stop means and said reinforcing member having at least one axially extending shoulder, said stop means arranged to abut said valve body adjacent said axially extending shoulder and limit rotation of said flow isolation member, said other portions of said plastic material forming said valve body and extending through said apertures in said reinforcing member preventing rotation of said reinforcing member relative to said valve body when torque is applied to said reinforcing member by said flow isolation member stop means; and

said reinforcing member preventing creep of said valve body and providing dimensional stability to said valve body to thereby maintain the sealing contact between said seal members and said valve body inner cylindrical wall.