Patents Assigned to Hill Engineering
  • Patent number: 8863640
    Abstract: A control system for extending and retracting a ram of a hydraulic coupler for coupling an attachment to an arm of an excavator or back hoe, said control system being adapted to provide an audible and/or visual alert to an operator to indicate a leak of fluid or loss of fluid pressure from said ram and/or from a hydraulic circuit supplying said fluid to the ram. Preferably the control system further comprises a flow sensor for sensing the flow of fluid in a feed line for supplying pressurized fluid to the ram and/or a pressure sensor for sensing the pressure of fluid in said feed line, said control system including at least one indication device for providing said audible and/or visual alert to an operator to indicate a leak of fluid or loss of fluid pressure in response to, or as a function of, the output of the flow sensor and/or the pressure sensor.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: October 21, 2014
    Assignee: Hill Engineering Limited
    Inventors: Ian Hill, Nick Elwell
  • Publication number: 20110088795
    Abstract: A control system for extending and retracting a ram of a hydraulic coupler for coupling an attachment to an arm of an excavator or back hoe, said control system being adapted to provide an audible and/or visual alert to an operator to indicate a leak of fluid or loss of fluid pressure from said ram and/or from a hydraulic circuit supplying said fluid to the ram. Preferably the control system further comprises a flow sensor for sensing the flow of fluid in a feed line for supplying pressurised fluid to the ram and/or a pressure sensor for sensing the pressure of fluid in said feed line, said control system including at least one indication device for providing said audible and/or visual alert to an operator to indicate a leak of fluid or loss of fluid pressure in response to, or as a function of, the output of the flow sensor and/or the pressure sensor.
    Type: Application
    Filed: October 15, 2010
    Publication date: April 21, 2011
    Applicant: HILL ENGINEERING LIMITED
    Inventors: Ian Hill, Nick Elwell
  • Patent number: 7455504
    Abstract: Fluid movers produce at least predominantly laminar flow internally in an axial or a radial direction in a rotor. A fluid mover rotor comprises a matrix of passages of appropriate size to produce at least predominantly laminar flow spaced circumferentially around the rotor. The passages may provide axial, radial or mixed flow. “Appropriate” dimensions may be selected for a specified volume flow rate. In a radial embodiment, a matrix of radially extending passages could comprise walls having an axial height projecting from an annular disk. The passages may be offset with respect to the radial direction to provide an angle of attack that minimizes incidence losses. The matrix structure allows the use of thin-walled passages to minimize blockage of entering air.
    Type: Grant
    Filed: January 19, 2006
    Date of Patent: November 25, 2008
    Assignee: Hill Engineering
    Inventors: Charles C. Hill, Theodore B. Hill
  • Patent number: 6671911
    Abstract: Multiple foam-filled cells form a cushioned support surface of a seat or mattress. Individual cells may be collapsed by connection through a manifold and valve to a vacuum source. The collapsed cell essentially removes contact pressure in a localized area of the person supported on the surface and restores localized blood flow. After a pre-determined time interval, atmospheric pressure is readmitted to the cell.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: January 6, 2004
    Assignee: Hill Engineering
    Inventors: Charles C. Hill, Theodore B. Hill, Carly A. Anderson
  • Patent number: 6450752
    Abstract: A feeder system for incrementally feeding a tube along a linear tube path to a point of use. The feeder system includes a frame, and first and second belts on the frame. The first and second belts are capable of moving incrementally in respective first and second belt paths and thereby incrementally moving a tube engaged by the first and second belts in the linear tube path.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: September 17, 2002
    Assignee: Hill Engineering, Inc.
    Inventor: Donald Hill
  • Patent number: 6354180
    Abstract: A system for cutting sheet material. The system has a first roller with at least one cutting element thereon with the first roller rotatable around a first axis and the second roller having at least one receptacle thereon and rotatable around a second axis. The first and second rollers are relatively positioned so that as the first and second rollers rotate around the first and second axes, the one cutting element aligns with and projects into the one receptacle to thereby cause cutting out of a discrete portion of a sheet material between the first and second rollers. A servo drive is provided for at least one of a) rotating the first roller around the first axis and b) rotating the second roller around the second axis.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: March 12, 2002
    Assignee: Hill Engineering, Inc.
    Inventor: Donald Hill
  • Patent number: 5890402
    Abstract: A method of forming tool dies, comprising the steps of (a) forming a plurality of unitary tool blank plates by mechanically securing a low carbon steel plate portion to a tool steel plate portion with a thin layer of brazing material therebetween, and heating the secured low carbon steel plate portion, tool steel plate portion, and brazing material layer to simultaneously (1) melt the brazing material to braze the low carbon steel plate portion to the tool steel plate portion and form the unitary blank plate, and (2) harden the tool steel plate portion, (b) maintaining an inventory of the tool blank plates, (c) retrieving one of the unitary blank plates from inventory in response to a tool die order from a customer, (d) operating on the retrieved blank plate to selectively shape the blank plate into a tool die as ordered by the customer, including (1) operating on the low carbon steel plate portion wherein at least a part of the operations on the low carbon steel plate portion do not include use of carbide to
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: April 6, 1999
    Assignee: Hill Engineering, Inc.
    Inventor: Thomas F. Nedbal
  • Patent number: 4814550
    Abstract: A method and apparatus for isolating electric power lines includes an insulator assembly to which is pivotally connected two line clamps. After the clamps clamp to the wire, the wire is cut so that the insulator isolates the line. In one form the clamping surfaces are curved in the longitudinal direction to make up for the loss of line length due to the elongation of the assembly under line tension. Cut-out assemblies for fuse and disconnect purposes are readily applied to the assembly by a lineman standing on the ground below.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: March 21, 1989
    Assignee: Black Hills Engineering & Development Corp.
    Inventor: James C. Newberg
  • Patent number: 4193282
    Abstract: A rolling machine for reducing the cross-sectional dimensions of an elongate workpiece, such as a steel billet, has two pairs of alternately operating rolls, each of which is journalled in an individual roll carrier. Each carrier is rotated about a carrier axis which is inclined at an angle of about 45.degree. to the axis of rotation of the roll journalled in the carrier. The carrier axes form the sides of a square around the passline which is normal to the plane in which the carrier axes are located. As the carriers rotate the two pairs of rolls alternately sweep over the workpiece and intermittently contact and reduce the workpiece in directions which are mutually at right angles. To avoid the formation of sharp edges to the rolled workpiece, either each roll is collared to enclose a workpiece edge, or each carrier additionally carries an edger roll which rounds that edge.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: March 18, 1980
    Assignee: Hill Engineering Company Limited
    Inventor: Alexander I. Wilson
  • Patent number: 4031764
    Abstract: A device for rotating a plurality of articles is formed with a substantially cylindrical passage, two helical paths being defined along the internal surface thereof; the helical paths are located diametrically opposite one another.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: June 28, 1977
    Assignee: Thomas Hill Engineering Co. (Hull) Ltd.
    Inventor: Sidney Curtis
  • Patent number: 4015496
    Abstract: A tube cutoff apparatus arranged to provide an improved cutoff of a tube avoiding dimpling of the tube. The apparatus includes an improved blade configuration and mechanism for moving the blade in different directions to effect a multistep tube cutoff. In a first step, the tube is chordally notched, and in a second step, the tube is diametrically sliced to provide a dimpleless cutoff.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: April 5, 1977
    Assignee: Hill Engineering, Inc.
    Inventor: Donald R. Hill