Patents by Inventor Clyde F. Davenport

Clyde F. Davenport has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6163895
    Abstract: A multi-purpose water pressure plunger is provided having an adjustable valve with a regulating lever that is attached to a handle. The handle is connected to an anti-backflow valve. The anti-backflow valve is removably connected to a plunger head that is made of a soft, pliable material that can easily deform to a desired shape so as to form a seal within a drain or pipe.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: December 26, 2000
    Inventor: Clyde F. Davenport
  • Patent number: 5787516
    Abstract: A multi-purpose water pressure plunger is provided having a compressible cup defining an interior cavity and having a solid rubber upper portion with a top and a bottom. The cup has an outer wall which extends to form a barrel-like bottom with edges for partially extending into and sealing against walls of a drain opening. The upper portion of the compressible cup has a central passage defined therethrough beginning in a first opening at the top of the upper portion and terminating in a second opening at the bottom of the upper portion. An elongated handle is attached to the top of the upper portion and has a lengthwise aperture therethrough. The water pressure plunger includes a rubber member with a central passage removably and interchangeably attachable to the bottom of the upper portion inside the interior cavity of the compressible cup and to the handle or a valve thereon. The central passage of the rubber member terminates in a nipple-shaped end for fitting into and sealing against a drain opening.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: August 4, 1998
    Inventor: Clyde F. Davenport
  • Patent number: 5546613
    Abstract: A multi-purpose water pressure plunger is provided having a compressible cup defining an interior cavity and having a solid rubber upper portion with a top and a bottom. The cup has an outer wall which extends to form a barrel-like bottom with edges for partially extending into and sealing against walls of a drain opening. The upper portion of the compressible cup has a central passage defined therethrough beginning in a first opening at the top of the upper portion and terminating in a second opening at the bottom of the upper portion. An elongated handle is attached to the top of the upper portion and has a lengthwise aperture therethrough. The water pressure plunger includes a rubber member with a central passage removably and interchangeably attachable to the bottom of the upper portion inside the interior cavity of the compressible cup and to the handle or a valve thereon. The central passage of the rubber member terminates in a nipple-shaped end for fitting into and sealing against a drain opening.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: August 20, 1996
    Inventor: Clyde F. Davenport
  • Patent number: 5537694
    Abstract: A multi-purpose water pressure plunger is provided having a compressible cup defining an interior cavity and having a solid rubber upper portion with a top and a bottom. The cup has an outer wall which extends to form a barrel-like bottom with edges for partially extending into and sealing against walls of a drain opening. The upper portion of the compressible cup has a central passage defined therethrough beginning in a first opening at the top of the upper portion and terminating in a second opening at the bottom of the upper portion. An elongated handle is attached to the top of the upper portion and has a lengthwise aperture therethrough. The water pressure plunger includes a rubber member with a central passage removably and interchangeably attachable to the bottom of the upper portion inside the interior cavity of the compressible cup and to the handle or a valve thereon. The central passage of the rubber member terminates in a nipple-shaped end for fitting into and sealing against a drain opening.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: July 23, 1996
    Inventor: Clyde F. Davenport
  • Patent number: 5287564
    Abstract: A multi-purpose water pressure plunger employs a source of pressurized water to dislodge clogs in bathroom drainage pipes and the like. The plunger is fashioned of a resilient cone-shaped cup, a rigid handle, an adjustable valve, and a means of connection to a pressurized source of water. Sealing against and partially extending into a drain opening, the cup permits full thrust of pressurized water into a drainage pipe without a backflow of water. The cup consists of an upper, deformable portion, and a solid, occlusive bottom portion defining a nipple-shaped end. A flow of pressurized water is supplied to the cup through an elongated and ridged handle with a lengthwise aperture therethrough. An adjustable valve including a ball component and a regulating lever controls the flow of water into the handle, and thus, to the clogged drain.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: February 22, 1994
    Inventor: Clyde F. Davenport
  • Patent number: 5261128
    Abstract: A multi-purpose water pressure plunger employs a source of pressurized water to dislodge clogs in bathroom drainage pipes and the like. The plunger is fashioned of a resilient cone-shaped cup, a rigid handle, an adjustable valve, and a means of connection to a pressurized source of water. Sealing against and partially extending into a drain opening, the cup permits full thrust of pressurized water into a drainage pipe without a backflow of water. The cup consists of an upper, deformable portion, and a solid, occlusive bottom portion defining a nipple-shaped end and a heightened center region opposite the nipple-shaped end surrounded by a concave recess. A flow of pressurized water is supplied to the cup through an elongated and ridged handle with a lengthwise aperture therethrough. An adjustable valve including a ball component and a regulating lever controls the flow of water into the handle, and thus, to the clogged drain.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: November 16, 1993
    Inventor: Clyde F. Davenport
  • Patent number: 5020166
    Abstract: A multi-purpose water pressure plunger employs a source of pressurized water to dislodge clogs in bathroom drainage pipes and the like. The plunger is fashioned of a resilient cone-shaped cup, a rigid handle, an adjustable valve, and a means of connection to a pressurized source of water. Sealing against and partially extending into a drain opening, the cup permits full thrust of pressurized water into a drainage pipe without a backflow of water. The cup consists of an upper, deformable portion, and a solid, occlusive bottom portion defining a nipple-shaped end. A flow of pressurized water is supplied to the cup through an elongated and ridged handle with a lengthwise aperture therethrough. An adjustable valve including a ball component and a regulating lever controls the flow of water into the handle, and thus, to the clogged drain.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: June 4, 1991
    Inventor: Clyde F. Davenport