Patents Represented by Law Firm Graybeal, Barnard, Uhlir & Hughes
  • Patent number: 3981329
    Abstract: A pair of side-by-side hydraulic fluid supply and return hoses are connected to side-by-side end ports at the free end of a journal block which is located between two spaced apart bearing blocks. A pair of coaxial, oppositely projecting, tubular journals carried by the journal block, and rotationally received in coaxial blind socket portions of passageways formed in the bearing blocks, serve to mount the journal block and hoses connected thereto for pivotal movement relative to the bearing blocks. Passageways in the journal block communicate the side-by-side hose ports with the interiors of the tubular journals which in turn communicate with the passageways in the bearing blocks via the blind sockets. The bearing blocks are detachably mounted onto an upper rear frame portion of a hydraulic tool, such as a hydraulic breaker. The bearing block passageways have ports on corresponding mounting sides of the bearing blocks which communicate with inlet and outlet ports in the tool housing.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: September 21, 1976
    Inventor: Maurice Wohlwend
  • Patent number: 3980035
    Abstract: A laterally extending trim vane is mounted for rotation about a horizontal axis on a submerged portion of a stern-drive propulsion unit housing, substantially within the slipstream of the propeller.The trim vane is mounted on structure which depends downwardly from a rearward part of a horizontally elongated intermediate portion of the housing. The aft location of the trim vane provides a relatively large moment arm for the vertical trim force. Hence, for a given moment, the aft position requires less force. Also, the propeller slipstream velocity relative to the vane is considerably higher than the speed of the boat. The aft location of the vane, providing the longer moment arm, and the utilization of slipstream water, providing a relatively high velocity of motive fluid, make it possible to make the control surface of the vane quite small.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: September 14, 1976
    Inventor: Sten E. Johansson
  • Patent number: 3967463
    Abstract: Front and rear shields are telescopically joined together. The front shield carries a power driven rotary cutterhead means. Main thrust rams are provided between the two shields for pushing the forward shield forwardly relative to the rear shield while the cutterhead means is being operated to mine the tunnel face, and also to pull the rear shield forwardly relative to the front shield. The rear shield includes a gripper assembly for reacting thrust and torque and a plurality of groups of auxiliary thrust rams which extend rearwardly from the rear shield to contact forward end portions of a tunnel lining which is erected under cover of a tail section of the rear shield. The auxiliary thrust rams are extendable a distance that is at least slightly larger than the axial length of one ring of tunnel lining segments. The main thrust rams are extendable a distance that is slightly larger than 1x of the stroke of the auxiliary thrust rams, where x is the number of groups of auxiliary thrust rams.
    Type: Grant
    Filed: August 5, 1974
    Date of Patent: July 6, 1976
    Assignee: The Robbins Company
    Inventor: Carlo Grandori
  • Patent number: 3967854
    Abstract: Each bucket includes a ground engaging leading portion characterized by roller cutter means alternating with scoop teeth transversely across the bucket. The scoop teeth on alternate buckets follow the path of roller cutter means on intermediate buckets. The scoop teeth on intermediate buckets follow the path of roller cutter means on alternate buckets.
    Type: Grant
    Filed: November 7, 1974
    Date of Patent: July 6, 1976
    Inventor: Charles L. Posciri
  • Patent number: 3967912
    Abstract: Two feed conveyors and two spreader augers are independently driven, each by its own drive motor. The control means for each feed conveyor includes a sensor at the discharge end of the feed conveyor and means responsive to changes in the level of the paving material at the sensor for proportionally increasing the drive speed of the conveyor as the level drops and proportionally decreasing the drive speed of the conveyor as the level rises. The control means for each auger includes a sensor adjacent the discharge end of the auger and means responsive to changes in the level of the paving material at the sensor for proportionally increasing the drive speed of the auger as the level drops and proportionally decreasing the drive speed of the auger as the level rises.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: July 6, 1976
    Inventor: Jimmy L. Parker
  • Patent number: 3966256
    Abstract: A cutting tool is mounted on the head of a support tripod, the legs of which are double-acting hydraulic cylinders. The rear ends of said cylinders are either pivotally connected to a frame portion of a tunneling machine or to movable barrel portions of three base cylinders having fixed rod portions. The cylinders are selectively extended and retracted for the purpose of moving the cutting tool forwardly and rearwardly and also up and down and sideways.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: June 29, 1976
    Assignee: The Robbins Company
    Inventor: Tyman H. Fikse
  • Patent number: 3964550
    Abstract: A mobile device for harvesting tree seedlings includes means for subsurface cutting to separate and loosen from the surrounding ground the body of earth adjoining the roots of the tree seedlings. The movement and relative position of the earth separating means enables it to efficiently sever the roots of the tree seedlings from the surrounding ground while allowing only a minimum amount of earth to adhere to the roots of the seedlings as they are removed. A plurality of paired gripper belts remove the loosened seedlings by lifting them upwardly and rearwardly relative to the ground, each pair of gripper belts having male-female intercoupled gripping surfaces which minimize damage to the stems of the seedlings. Disposed below the gripper belts are a plurality of elongated root beater means adapted to move in a transverse oscillatory manner to agitate the roots and remove the earth adhering thereto without damaging the seedlings.
    Type: Grant
    Filed: September 16, 1974
    Date of Patent: June 22, 1976
    Assignee: J. E. Love Company
    Inventor: James G. Storms
  • Patent number: 3961925
    Abstract: A portable, self-contained, refrigerated storage and transportation container for preserving perishable commodities includes an insulated storage chamber for the perishable commodities. A recirculating liquid cooling system is provided within the container and includes conduit and nozzle means disposed within the storage chamber adapted to spray a liquid coolant, such as chilled brine, directly onto the perishable commodities to maintain them at a uniform cool temperature. The sprayed liquid coolant is collected in the bottom portion of the storage chamber. A closed refrigeration system is also provided within the container and includes, in part, heat exchange means disposed within the bottom portion of the storage chamber for cooling the sprayed liquid coolant which has collected there.
    Type: Grant
    Filed: December 16, 1974
    Date of Patent: June 8, 1976
    Inventor: John H. Rhoad
  • Patent number: 3960504
    Abstract: An apparatus and method for direct flame incineration of a polluted air effluent, such as the effluent from a coffee roasting oven. The apparatus comprises a cylindrical housing containing three concentric longitudinally aligned shells, each of which defines a respective combustion zone, and with the outermost shell defining with the housing an effluent heat exchange passageway to receive the effluent from an effluent inlet. A fuel gas or oil nozzle directs a spray of fuel forwardly into the first innermost shell, with primary air also flowing into the first shell to provide initial combustion of the resulting air-fuel mixture. The effluent flowing from the heat exchange passageway flows partly through an annular secondary inlet into the combustion zone of the second intermediate shell, and partly through an annular tertiary passageway into the final combustion zone of the third outermost shell.
    Type: Grant
    Filed: September 17, 1973
    Date of Patent: June 1, 1976
    Assignee: Griffin Research & Development, Inc.
    Inventor: Lawrence C. Griffin
  • Patent number: 3952251
    Abstract: Compatible single sideband (CSSB) transmission system utilizing a three tone generator to develop the characteristic CSSB modulation of an electromagnetic energy carrier wave, i.e. a somewhat reduced level carrier, a full level single sideband, and a lower level second order sideband, with only nominal envelope distortion and within the narrow bandwidth restrictions commonly assigned to voice communication systems and the like. In one aspect, the invention accomplishes restriction of the bandwidth of the transmitted CSSB signal by conjunctively or alternatively using only the relatively low audio frequencies (frequencies below about one-half of the frequency span of the prescribed bandwidth) to modulate the CSSB generator and separately modulating a single sideband suppressed carrier (SSBSC) generator with the higher audio frequencies, then summating the respective generator outputs to provide the transmitted signal.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: April 20, 1976
    Inventor: Leonard R. Kahn
  • Patent number: 3944749
    Abstract: Amplitude modulation (AM) stereophonic transmission receivers for reception of a radiant energy carrier wave with two stereo related signals, each appearing as a first order single-sideband, the carrier wave preferably being also modulated with an infrasonic frequency (e.g. 15 Hz) signal indicating stereo signal presence (with such infrasonic frequency modulation being either amplitude modulated or phase modulated). The upper sideband and the lower sideband portions of the received signal are separately detected and through voltage comparison means are applied to the development of automatic switching control of the detector outputs to deliver as receiver outputs either stereophonically related audio signals in the presence of different upper and lower sideband detector outputs or to deliver monophonically related (i.e. combined) detector outputs in the instance of reception of a monophonically modulated carrier wave.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: March 16, 1976
    Inventor: Leonard R. Kahn
  • Patent number: 3943479
    Abstract: A thermally actuated energy regulator of the kind including a switch controlled through a heat responsive actuator in the form of a bi-metal assembly. A lever is arranged to act between the actuator and the switch so as to actuate a switch in response to pressure applied to the lever by deflection of the actuator, which deflection occurs when the heater associated with the actuator is energized. The lever reacts against a fulcrum, the position of which is adjustable through a cam, and that adjustment permits variation of the amount of deflection of the actuator necessary to cause operation of the switch through the interacting lever. The switch, actuator and cam are secured to a body section in fixed relationship so that calibration of the regulator is simplified.
    Type: Grant
    Filed: July 24, 1974
    Date of Patent: March 9, 1976
    Assignee: Australian Controls Industries Pty., Ltd.
    Inventor: Norman Jack Turner
  • Patent number: 3941199
    Abstract: A power transmission capable of transmitting power to both the front and rear sets of wheels of a vehicle, and also to automatically selectively transmit power to the slower rotating set of front or rear wheels. The transmission comprises an inner driving hub which acts through two interconnected sets of overrunning roller clutches to drive either or both of a forward and rear annular driven output member. The forward driven member is connected through a laterally extending chain drive to in turn drive a forwardly extending propeller shaft to transmit power to the front set of wheels to the vehicle. The rear driven member acts through a rearwardly extending propeller shaft to supply power to the rear set of wheels.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: March 2, 1976
    Assignee: Warn Industries, Inc.
    Inventor: Richard D. Williams
  • Patent number: 3936224
    Abstract: A sectionalized turbine wheel mounted for rotation about a vertical axis and having a plurality of turbine blades mounted to its circumference. There is an outer circumferential feeder pipe surrounding a distribution pipe that defines a distribution chamber, which in turn leads through a plurality of vane assemblies to the turbine blades. The turbine blades are substantially enclosed in a housing structure which provides an annular downward opening. Water under pressure flows into the feeder pipe, thence into the distribution chamber and through the vane means to impinge on the turbine blades, from which the water is discharged in a downward direction.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: February 3, 1976
    Inventor: Oscar M. Nordquist
  • Patent number: 3935753
    Abstract: A positive drive differential to drive either or both of a pair of co-axially mounted axle-driving hubs, and to permit free overrun of either hub. There are two sets of roller clutch elements between the two hubs and the drive casing, and these are positioned in two cages having inwardly extending radial flanges located proximate each other between the two hubs. A pair of contiguous spring loaded washers, mounted centrally in the differential, press axially outwardly against the cage flanges to cause frictional engagement of the cage flanges with the hubs. This in turn causes the hubs to be further pressed outwardly against the drive casing to cause frictional engagement of the two hubs with the drive casing.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: February 3, 1976
    Assignee: Warn Industries, Inc.
    Inventor: Richard D. Williams
  • Patent number: 3935690
    Abstract: A method of packaging a self-inflating air mattress comprising an open cell foam core and an air impervious envelope. A plurality of mattresses are stacked intermittently between forming boards and evacuated. Each bag is then rolled up and placed in a flexible tubular container and the vacuum released on the mattress to provide a sung package. To remove the mattress, the container and mattress are compressed, the inflating valve closed, and the mattress slipped from the container.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: February 3, 1976
    Inventors: James M. Lea, John D. Burroughs