Patents by Inventor Lawrence W. White

Lawrence W. White 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: 5848615
    Abstract: A check valve cartridge for a fluid pump, the check valve cartridge including: a valve seat; a flap valve member seated on the valve seat, the flap member having a first portion movable toward and away from the valve seat; a bumper seated on the flap member, said bumper member for biasing the first portion of the flap valve member toward the valve seat. The check valve cartridge also including a stop member located on the bumper, between the stop member and the flap member; and fastening means for joining the base, flap member, bumper, and stop member to form the integral valve cartridge. The check valve cartridge is seated in a recess formed in the pump housing and is located between the pump housing and a flow manifold.
    Type: Grant
    Filed: December 4, 1996
    Date of Patent: December 15, 1998
    Assignee: Ingersoll-Rand Company
    Inventors: Michael Conti, Lawrence W. White, William R. Tate, Stephen D. Able
  • Patent number: 5257467
    Abstract: Apparatus for drying damp carpet and carpeting materials is disclosed. The apparatus includes a blower (22) for blowing air under the carpet, and a clamp (24) affixed to the blower (22), for securing the carpet to the blower (22). The blower (22) includes a blower housing (26) with a head (28) having air intake openings (32) and a sleeve (30) that forms an air outlet opening (36); and a powered fan (34) attached within the head (28) of the blower housing (26) for blowing air out of the sleeve opening (36). The clamp (24) comprises a mounting bracket (44) affixed to the blower housing (26), a rod (46) slidably coupled to the mounting bracket (44) and a restraint mechanism (54) for preventing the rod (46) from sliding upward away from the carpet. The restraint mechanism (54) is attached to the mounting bracket (44). The clamp (24) also includes a foot ( 48) attached at the lower end of the rod (46) for holding the carpet against the sleeve (30) of the blower housing (26).
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: November 2, 1993
    Assignee: Dri-Eaz Products, Inc.
    Inventor: Lawrence W. White
  • Patent number: 5133387
    Abstract: A bellows is comprised of a unitary body formed of relatively thin annular walls, open at one end and closed at the other. The walls are constructed and arranged as a spiral groove, whereby the bellows can be fabricated from plastic by injection molding in a relatively inexpensive fashion. The bellows can be formed of two layers joined to one another, a backup layer formed of metal or plastic and a protective layer formed of plastic such as PFA and PVDF.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: July 28, 1992
    Assignee: The Aro Corporation
    Inventors: Gabriel J. Pietrykowski, Lawrence W. White
  • Patent number: 5129427
    Abstract: A pulsation damper for a pumped liquid system has a housing with two axially identical hollow halves which, when joined at their flanges, form a substantially cylindrical cavity. Each housing half has a port on its longitudinal axis for fluid communication with a liquid chamber and a gas chamber defined by a flexible non-porous member. A pressurizing valve is provided, in a manual embodiment, for manually increasing or decreasing pressure in the gas chamber. An automatic pressure compensator is provided in an automatic embodiment and is so sized and configured as to be insertable and removable from the housing of the pulsation damper through the port on the end of housing. Provision is also made for modularly adding volumes of air to increase the effective gas chamber volume.
    Type: Grant
    Filed: April 17, 1991
    Date of Patent: July 14, 1992
    Assignee: The Aro Corporation
    Inventors: Lawrence W. White, Gabriel J. Pietrykowski
  • Patent number: 5113898
    Abstract: A valve assembly for fluid pressure regulation provides freedom from static pressure creep by eliminating distortions and stresses normally introduced to valve parts during assembly of the regulator. A floating valve seat permits normal installation of a valve seat housing in the regulator body with no transfer of stress or distortion to the valve seat. Thus statis pressure creep, normally attributable to micro distortions of the valve seat, is avoided. Options are also provided to install the floating valve seat directly in a regulator body without the valve seat housing.
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: May 19, 1992
    Assignee: The Aro Corporation
    Inventors: Lawrence W. White, Gabriel J. Pietrykowski, Stephen D. Able
  • Patent number: 5107887
    Abstract: A fluid pressure regulator provides features which enable an extended regulator life in high pressure service. Dual flexible diaphragms provide chemical resistance in contact with the working fluid and abrasion and fatigue resistance in contact with a backup plate and piston assembly. The backup plate has a bore which is sufficiently long and close fitting with the piston so that axial alignment is assured and there is minimal tendency for the piston to become cocked within the bore. Provision is also made for preventing fretting corrosion between the piston and the backup plate by coating at least one of the surfaces, if necessary, to assure that dissimilar metals only are in contact in that couple. Seals between the regulator housing body and the diaphragm and between the valve stem and diaphragm may be provided by resilient seal rings or by annular protrusions integrally formed on one or both of the diaphragms.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: April 28, 1992
    Assignee: The Aro Corporation
    Inventors: Lawrence W. White, Gabriel J. Pietrykowski, John P. Altman