Patents by Inventor Robert F. Evans

Robert F. Evans 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: 4295254
    Abstract: A machine for terminating flat multi-conductor transmission line cable to a connector. The machine includes a wire locator for providing semi-automatic positioning of cable shield wires and signal wires for terminations to a buss bar and connector tails respectively. The machine facilitates a method of mass termination of cable wires to a connector, which includes first stripping the cable to expose shield and signal wires, then positioning the cable wires in the machine for termination of shield and signal wires to the connector. The signal wires are terminated first to terminal tails extending from the connector. This is followed by the reverse bending of the shield wires over the buss bar and termination of the shield wires to the bar. In this fashion, the multiple wires of the cable may be simultaneously positioned, and respective sets of signal and shield wires mass terminated by the machine.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: October 20, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John E. Adams, Robert F. Evans, John H. Gavin
  • Patent number: 4294492
    Abstract: A caliper seal assembly is adapted to seal two relatively moving parts in a drilling tool or drill bit or other device where a sealing relationship must be maintained under relatively large relative position and tolerance changes between the two movable parts, under relatively rapid pressure variations and surges, and under relatively high temperature conditions. The caliper seal includes a pair of flexible flank members having contact pads formed thereon and between which sealing surfaces of a flange-like projection extend. The caliper seal is particularly advantageous for sealing bearing assemblies between a cutter wheel and the body of a rotary drill bit. A heat pipe assembly can be incorporated within the flange-like projection to remove excess heat generated by the frictional contact of the contact pads on the flange sealing surfaces. The flange projection can also be formed with an interior fluid conducting conduit to remove excess heat.
    Type: Grant
    Filed: May 27, 1980
    Date of Patent: October 13, 1981
    Inventor: Robert F. Evans
  • Patent number: 4291773
    Abstract: A deflectable drill collar having strictive material deflectable elements is connected in a drill string of drilling apparatus. Energization of the strictive material deflectable elements, such as magnetostrictive elements, deflects the drill collar, thereby altering the axes of the drilling apparatus connected at opposite ends of the deflectable collar from a colinear relationship to a non-colinear relationship. Energizing means associated with the deflectable drill collar energizes the strictive material elements during preselected intervals of rotation of the drilling apparatus to place the cutting elements of a drill bit into more effective cutting relation with gage corner material of the borehole, or to articulate the drill string and force the drill bit in a desired direction.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: September 29, 1981
    Inventor: Robert F. Evans
  • Patent number: 4287957
    Abstract: A flow stream of drilling gas in a gaseous drilling fluid circulation drilling system is separated from that drilling gas supplied to the drill string, and the flow stream is reduced in temperature prior to supplying the flow stream to a drilling tool component to be cooled. A heat exchanger is employed to remove heat from the flow stream, and a second separate flow stream of drilling gas is directed over the heat exchanger to remove the heat. The temperature of the second cooling stream is reduced by thermodynamic effects. Various drilling tool components may be cooled, including bearing means operative between two relatively movable parts, a seal assembly operative to seal lubricant between two relatively moving parts, and cutter elements of a drag-type drill bit. The seal assembly includes a flange-like projection member and a fluid conducting conduit in thermal transferring relationship with the projection member.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: September 8, 1981
    Inventor: Robert F. Evans
  • Patent number: 4262758
    Abstract: The advancement angle of a borehole cut by a rotary drill bit of the type which forms a cylindrical sidewall, a drill face and a circumferentially extending gage corner, is controlled by removing a different amount of the gage corner material over a selected partial arc of the gage corner circumference during each rotation of the drill bit. The different amount of material removed causes the remaining arc of the gage corner circumference to apply a slight lateral force on the drill bit, thus forcing the drill bit in a desired direction. Gage corner removal apparatus include selectively extendable cutter devices, a hinged connector hingeably connecting the drill bit to the end of the drill string, and a pivotable single cutting wheel member. Selectively activating the gage corner removal apparatus during each of a plurality of subsequent drill bit revolutions results in a cumulative angle change effect.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: April 21, 1981
    Inventor: Robert F. Evans
  • Patent number: 4245644
    Abstract: A breast prosthesis or augmenting form for use in a breast cup of a brassiere-like woman's undergarment includes a spring-mass system. The spring-mass system includes a mass member forwardly positioned from the chest of the wearer by a resilient cantilever spring support means. The resilient cantilever spring support means is arranged to effectively absorb, store and transmit energy in quantities generally comparable to that available in the chest area due to natural body movement. The spring support means may include a spring wire arrangement or an elastomer resilient base material. The spring-mass system can also be employed in a conventional brassiere to enhance natural breast movement.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: January 20, 1981
    Inventor: Robert F. Evans
  • Patent number: 4240695
    Abstract: An end-to-end connector for optical fibers. A plastic body has opposed sockets leading to an interconnecting bore. The sockets receive terminals in which the fibers to be connected are aligned and gripped.
    Type: Grant
    Filed: June 20, 1979
    Date of Patent: December 23, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert F. Evans
  • Patent number: 4240674
    Abstract: Positive lubricating elements and positive indexing elements are retained between raceways of two relatively rotating race members of a bearing assembly. Sliding load bearing segments may also be retained between the raceways, and the indexing elements derive force from relative rotation of the raceways to index or move the bearing segments relative to both raceways. Lubricant is forced into the raceways by the lubricating elements. Preferably the lubricating and indexing elements are both defined by hollow roller spring elements which are resiliently compressed between the raceways and which separate adjacent bearing segments. Lubricant is carried within the hollow interior of the roller elements. Means associated with the roller elements and race members operatively reduces the volume of the interior of the roller element and forces lubricant on the raceways, preferably at positions where the race members withstand large loads.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: December 23, 1980
    Inventor: Robert F. Evans
  • Patent number: 4240586
    Abstract: Friable particulate material is crushed and classified by apparatus comprising a grinder apparatus operatively positioned in the hollow interior of a relative rotationally mounted container. The grinder apparatus preferably comprises three rotationally mounted cone wheel roller members, each of which includes an outer grinding surface of predetermined contour. The outer grinding surface of each of the roller members maintains substantial conformance with a grinding face of the cylinder container from a center area to an outer edge of the grinding face as the roller members rotate. Feed particles of friable material and a continuous supply of fluid are introduced into the container and diffused substantially over the whole grinding face. Once the feed particles have been crushed to a predetermined size, the crushed particles are carried away from the grinding face by the flow of fluid exiting the hollow interior.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: December 23, 1980
    Inventor: Robert F. Evans
  • Patent number: 4211292
    Abstract: The advancement angle of a borehole cut by a rotary drill bit of the type which forms a cylindrical sidewall, a drill face and a circumferentially extending gage corner, is controlled by removing a different amount of the gage corner material over a selected partial arc of the gage corner circumference during each rotation of the drill bit. The different amount of material removed causes the remaining arc of the gage corner circumference to apply a slight lateral force on the drill bit, thus forcing the drill bit in a desired direction. Gage corner removal apparatus include selectively extendable cutter devices, a hinged connector hingeably connecting the drill bit to the end of the drill string, a pivotable single cutting wheel member, a hydraulic fluid jet impinging upon the gage corner, and apparatus for delivering additional drillable particles to the gage corner.
    Type: Grant
    Filed: July 27, 1978
    Date of Patent: July 8, 1980
    Inventor: Robert F. Evans
  • Patent number: 4209684
    Abstract: A high energy electron or laser beam is preferably used to assemble a drill bit. Bit segments are integrally adjoined together to form the drill bit assembly. Abutting confronting faces of the adjoining bit segments are aligned parallel to the drill bit axis and are fused together. The parallel alignment significantly simplifies the beam fusion process. The gage of the gage cutting elements of the bit segments is adjusted independently of the process involving assembly of the bit segments. Metal in a leg portion of the bit segments is fused in a zone of predetermined configuration to adjust the gage of the gage cutting elements. The zone of fused metal applies thermal contraction to the leg portion or permanently sets or relieves induced strain forces in the leg portion to permanently deflect the leg portion to a desired position at which the proper gage is obtained.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: June 24, 1980
    Inventor: Robert F. Evans
  • Patent number: 4193463
    Abstract: In a drilling bit, a cone shaped cutter is rotatably mounted on a spindle on anti-friction bearings and on a friction bearing in the nose of the spindle. A passage is formed in the exterior cylindrical surface of the spindle nose in the load bearing zone. This passage is connected to a radial passage on the end or thrust bearing surface of the spindle, and the center of the thrust bearing surface communicates with a weep hole in the nose of the cutter. Cooling fluid is ducted through the spindle and through these passages to provide cooling directly in the area where the generated heat is the greatest and fluid flow a minimum in previous constructions.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: March 18, 1980
    Assignee: Smith International, Inc.
    Inventor: Robert F. Evans
  • Patent number: 4151051
    Abstract: A deposition unit having a cathode surface is submerged in a natural body of moving water containing various materials including metallic materials carried by the flow of movement of the water body. The flow of water encompasses the deposition unit and contacts the cathode surface. An electric current at the cathode surface causes electrodeposition of certain materials contained within the flow of moving water. The electrical energy for electrodeposition is derived from a naturally occurring and proximate energy source at the body of water. Energy from tidal flow, from water movement beneath the surface, from wave motion at the upper surface, or from a temperature difference between the upper and lower levels of the water body, operates an electrical generator which supplies the electrodeposition energy. The flow of water relative to the deposition unit cooperatively interacts with magnetic flux emanating from another embodiment of the deposition unit to establish the electrodeposition energy.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: April 24, 1979
    Inventor: Robert F. Evans
  • Patent number: 4148368
    Abstract: A tungsten carbide insert for mounting in a rolling cone cutter comprises a base for mounting in the rolling cone cutter, an end converging to the work surface, and a diamond insert embedded in a portion of the work surface to improve the wear resistance of the insert. Preferably the diamond insert is embedded in the portion of the work surface extending farthest from the rolling cone cutter in which the tungsten carbide insert is mounted. Diamond inserts are provided in carbide inserts on the gage row of a cutter. Diamond inserts can also be used in tungsten carbide inserts on the heel row of a rolling cone cutter for maintaining gage of a hole being bored.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: April 10, 1979
    Assignee: Smith International, Inc.
    Inventor: Robert F. Evans
  • Patent number: 4144936
    Abstract: Apparatus is disclosed for milling metal submerged in salt water or within a hole, such as cutting off the upper ends of pipes and casings in a well-drilling operation below the sea floor. A hydraulic motor is suspended in the hole and driven by sea water to rotate an electrical generator and to rotate a cutting tool. The tool includes radially movable, electrically conductive elements which form the cathodes of an electrochemical machining operation for removing metal. The tool elements include abrasive material so that they can mechanically cut through cement.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: March 20, 1979
    Assignee: Smith International, Inc.
    Inventor: Robert F. Evans
  • Patent number: 4127043
    Abstract: A rock bit and manufacturing method wherein journal-bearing pins which support rotatable cutters on the bit body are separately machined and heat treated, and then mounted on the bit body by electron-beam welding or a related process of energy-beam bonding.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: November 28, 1978
    Assignee: Smith International, Inc.
    Inventor: Robert F. Evans
  • Patent number: 4126194
    Abstract: A three cone rock bit includes an improved circulation system for drilling fluid which increases the horizontal flow vector of the fluid adjacent the bottom surface of the hole being drilled. A pair of nozzles, located near the hole perimeter and between adjacent pairs of drilling cones, inject drilling fluid at one side of the hole. An extended pickup tube terminating between the remaining pair of drilling cones and close to the bottom of the hole being drilled channels fluid from the bottom of the hole to the annulus between the hole and the drill string.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: November 21, 1978
    Assignee: Smith International, Inc.
    Inventor: Robert F. Evans
  • Patent number: 4125167
    Abstract: A large diameter drill bit having a plurality of rolling cutters is provided with permanent magnets mounted on flexible flaps to collect magnetic debris on the bottom of a drill hole. A flap carrying a permanent magnet is mounted adjacent each cutter, or flaps carrying magnets are formed in a radially extending row to sweep the bottom of the hole as the bit rotates. In another form, magnets are included in wheels which roll on the bottom of the hole to collect the magnetic debris.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: November 14, 1978
    Assignee: Smith International, Inc.
    Inventors: Robert F. Evans, James H. Allen
  • Patent number: 4109991
    Abstract: An electrical connector for insulated wires comprising a terminal for each wire comprising a flat member having an opening therein including a pair of spaced opposing wire contact lips extending inwardly in said opening, and a pair of insulation-skiving blades, each insulation-skiving blade overlying a contact lip; and an insulated housing including a base and a cover engageable with the base.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: August 29, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert F. Evans
  • Patent number: T970002
    Abstract: a cutting element for mounting in a rolling cone cutter of a rock drill bit has a notch in the periphery of its base for improved retention of the cutting element in the rolling cone cutter. The longitudinal axis of the notch is essentially transverse to the direction of insertion of the cutting element into the rolling cone cutter. To maximize the effectiveness of the notch in improving retention of the cutting element, preferably the notch is sharp lipped.
    Type: Grant
    Filed: September 15, 1977
    Date of Patent: May 2, 1978
    Assignee: Smith International, Inc.
    Inventors: Harry E. Kidder, Robert F. Evans