Patents Represented by Attorney Keith Schoff
  • Patent number: 6319415
    Abstract: A packaged fluid filter comprises a sealed canister fitted with fluid inflow means and fluid outflow means which communicate internally of the canister respectively with proximal ends of an axial flow filter element hollow core spool, and outflow face of wound tissue laid on said core spool, thereby serving to eliminate need for a fixed spool holder internally of the canister.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: November 20, 2001
    Inventor: Harvey R. Schade
  • Patent number: 5868280
    Abstract: Minimalized energy use and operational cost are provided by the method and apparatus of this invention for liquid distribution system in which pumped liquid is charged to a pneumatically pressurized storage tank, filling it to an optimum level for subsequent distribution of incremental quantities of liquid drawn from the tank, as typical for well water systems of rural residiences. A pneumatic pressure-head of nominally constant mass is maintained in a liquid storage tank during intermittent operations of filling and of discharging liquid from the storage tank, thereby neccesitating minimal venting or charging of air for mainting constancy of pneumatic mass in the tank.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: February 9, 1999
    Inventor: David H. Schroeder
  • Patent number: 5743211
    Abstract: Livestock feed bunkers are disclosed which are usable universally with all forms of feed, whether ground, loose or chopped forage, mixed grain and forage, silage, haylage, or hay bales, including large round bales. An open bottom hopper above a floor manger is provided enclosed by a peripheral framework through which heads and necks of livestock can pass, with some framework being gate-mounted to swing about a vertical axis for leaving a side of the feeder unobstructed to facilitate loading of large round bales in side-by-side disposition into the bunker either with axes of the bales transverse and with circumferential faces abutting, or with axes aligned, without the bales being raised above floor level, and also, if desired, with either the unhinged end of the gate-mounted framework being top-hinged to swing inwardly when pushed by the shoulders of livestock toward the center of the manger when animals are reaching for feed in the middle of the bunker.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: April 28, 1998
    Inventor: John R. Schoessow
  • Patent number: 5568789
    Abstract: A hanging or fixedly suspended bird feeder embodies an upright, tubular, smooth-walled, feed container configured with feed ports in which at least lower portions of the lips of the ports are recessed radially inward from the side wall of the container into the base edge for the purpose of deterring marauding squirrels from obtaining a claw hold on the container wall. A saucer-shaped perch extends radially from beneath the feed container, suspended by elastic cord which yields and stretches under weight of a squirrel, thwarting attempts by squirrels to feed by upsetting the perch thereby ejecting the creatures to the ground.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: October 29, 1996
    Inventors: Eldo C. Koenig, Evan F. Koenig
  • Patent number: 5522471
    Abstract: A power operated wheeled cart for hauling bulk materials is constructed so that it can be knocked-down into a condition of partial disassembly in a manner such that a base platform can be inverted and used as a structural base for attaching crating members to form a compact modular shipping unit which utilizes a minimum of crating components.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: June 4, 1996
    Inventor: Dennis J. Hilgendorf
  • Patent number: 5505677
    Abstract: Elastic cable exercise apparatus is provided with adjustably positionable, rotatable hand-hold grips, safety loop means for arresting cable contraction when a door is utilized for anchoring the cable, and a harness for being worn on the head and attached to a cable to facilitate exercise of neck muscles.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: April 9, 1996
    Inventor: Robert S. Hinds
  • Patent number: 5421787
    Abstract: The invention effects an increase in the range of continuously variable tool speed and torque control for machine tools beyond that conventionally available for operation from single phase alternating current. Interactive operator control of mechanical speed regulation is additively coupled to electrical control of direct current motor drive to reduce or eliminate machine down time needed for performing a series of varied machine operations.
    Type: Grant
    Filed: September 18, 1992
    Date of Patent: June 6, 1995
    Inventor: Wayne Ellis
  • Patent number: 5404696
    Abstract: An aquatic-weed removing machine is provided with a paddle wheel equipped with a hinged plate connected to the peripheral edge of each paddle in a manner such that as the wheel rotates, individual plates pivot from an inward folded position at the edge of the paddles to a radially extended one, falling downward by gravity as the wheel sequentially places the paddles in the lower forward quandrant of their cycle. By a combination of centrifugal force and weight, the plates are thrown into pressing contact with the top of an underlying, tangentially moving conveyor belt upon which uncut weeds are laid by forward motion of the machine in the water, causing the weeds to be tightly held on the belt and to be pulled out by the roots as both the belt and the machine continue in their directions of motion.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: April 11, 1995
    Inventor: Oscar A. Vasby
  • Patent number: 5377539
    Abstract: An air pressure gauge is provided integrally with a valve stem extender as used with automotive vehicle wheels mounting tubeless or tube-type air inflated tires. The gauge comprises a Bourdon tube concentrically coiled about the barrel of the valve stem extender and communicated to the interior of the barrel through an orifice provided in the wall of the barrel. The Bourdon tube carries a dial pointer at its outer end which registers with a stationary dial face bearing visible indicia indicating tire inflation pressure. An annular viewing crystal is provided over the pointer and dial face. The gauge displays air inflation pressure reading constantly and need not be disturbed while air is being added to a tire.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: January 3, 1995
    Inventor: Robert LaSalle
  • Patent number: 5337449
    Abstract: A handgrip for attaching to a link chain to shield a user's hand from injury caused by pinching a flesh, comprised of an elongated sleeve having diametrically opposed recesses therein. The recesses being open at their bottoms for the passing of a threaded fastener therethrough and through a link in the chain passing through the sleeve. A nut received in an associated recess and threaded to the threaded fastener.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: August 16, 1994
    Inventor: David Lutzke
  • Patent number: 5218986
    Abstract: Water pumping apparatus is described for use with wells in which on-off cycling in pump operation is minimized by providing an air compressor and compressed air holding tank feeding an pressure regulating valve connected to discharge into a water holding tank, thereby enabling constant pneumatic pressure to be maintained in the water tank without regard to water level in the tank so that each cycling of the water pump will completely fill the water tank from nominally empty condition to nominally full condition.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: June 15, 1993
    Inventor: Duane C. Farwell
  • Patent number: 5216780
    Abstract: A tubular handgrip for attaching to link chain as a sleeve is made by joining a pair of identical semi-circular components around a chain. The mated components each has a post portion which extends transversely through a link in the chain to prevent the grip from slipping along the chain with the two components being mutually adjustable lengthwise to enable the spacing between post portions to be varied as necessary to accept any chain-link length.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: June 8, 1993
    Inventors: David E. Lutzke, Ferdinand F. Salzmann
  • Patent number: D321796
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: November 26, 1991
    Inventor: George W. Forrand
  • Patent number: D334856
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: April 20, 1993
    Inventor: Ulrich Sielaff
  • Patent number: D339256
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: September 14, 1993
    Inventor: Ulrich Sielaff
  • Patent number: D342563
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: December 21, 1993
    Inventor: Bogdan Tukiendorf
  • Patent number: D348793
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: July 19, 1994
    Inventor: Dennis J. Herrick
  • Patent number: D356763
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: March 28, 1995
    Inventor: Douglas J. Herrick
  • Patent number: D364763
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: December 5, 1995
    Inventor: Ulrich Sielaff
  • Patent number: D422202
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: April 4, 2000
    Inventor: Joel Maki