Patents by Inventor Robert C. Berfield

Robert C. Berfield 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: 7513464
    Abstract: A holder for storing ribbed vacuum cleaner hoses and associated vacuum cleaner tubes that includes a pair of support members mounted on a support, each support member having one or more ribs to engage the corrugated surface of the hose.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: April 7, 2009
    Assignee: Shop-Vac Corporation
    Inventor: Robert C. Berfield
  • Patent number: 7395601
    Abstract: A rotary flail feeding device for trimming vegetation includes a head for storing flail line and a unitary, removable subassembly comprising a winding post and a line guide ring rotatably mounted on the post. The subassembly is removed from the head to facilitate loading flail line into the cavity and to assure that dual flail lines are properly positioned when the subassembly is repositioned on the head.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: July 8, 2008
    Inventor: Robert C. Berfield
  • Publication number: 20080098606
    Abstract: A rotary flail feeding device for trimming vegetation includes a head for storing flail line and a unitary, removable subassembly comprising a winding post and a line guide ring rotatably mounted on the post. The subassembly is removed from the head to facilitate loading flail line into the cavity and to assure that dual flail lines are properly positioned when the subassembly is repositioned on the head.
    Type: Application
    Filed: February 22, 2007
    Publication date: May 1, 2008
    Inventor: Robert C. Berfield
  • Patent number: 7191989
    Abstract: A holder for storing ribbed vacuum cleaner hoses that includes a pair of support members mounted on a support, each support member having one or more ribs to engage the ribbed surface of the hose. The ribs include a lip that prevents displacement of the hose away from the support.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: March 20, 2007
    Inventor: Robert C. Berfield
  • Patent number: 7100776
    Abstract: A holder for vacuum cleaner tools includes a flat plastic body mounted on a wall or between exposed studs on a wall with a panel bowed outwardly from the wall. The panel has a plurality of upwardly extending fingers to receive and hold vacuum cleaner tools.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: September 5, 2006
    Inventor: Robert C. Berfield
  • Patent number: 6530116
    Abstract: A vacuum cleaner includes a housing having a housing passage with a passage inlet, air entering through the passage inlet flowing in a first direction and the housing passage directing air flowing therethrough in a second direction which is more than 90 degrees different from the first direction. The vacuum cleaner also includes a blower adapted to be used separately from the vacuum cleaner, the blower having a blower housing with a blower inlet, a blower outlet, and defining a blower passage between the blower inlet and the blower outlet, an impeller disposed in the blower passage to move air between the blower inlet and the blower outlet and a motor mounted to the blower housing and coupled to the impeller to move the impeller. The blower is detachably secured to the housing with the blower outlet disposed in communication with the passage inlet.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: March 11, 2003
    Assignee: Shop Vac Corporation
    Inventors: Robert C. Berfield, Ronald Griffin, Craig Seasholtz
  • Patent number: 6508618
    Abstract: A pump has a housing defining a pump chamber and having a shaft opening. An impeller shaft extends through the shaft opening and is sized to define a gap between the impeller shaft and the shaft opening. An impeller is attached to the shaft inside the pump chamber. The impeller includes a first set of impeller blades for transporting fluid through the pump chamber and a second set of impeller blades for creating a pressure force which pushes fluid away from the shaft opening. The pump with sealless shaft prevents fluid from leaking through the gap, and therefore is particularly suited for use in a tank-type vacuum cleaner capable of collecting both dry material and fluid. The gap is used in such an application to prime the pump, thereby discharging fluid collected in the tank.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: January 21, 2003
    Assignee: Shop-Vac Corporation
    Inventor: Robert C. Berfield
  • Patent number: 6499182
    Abstract: A convertible blower port for a vacuum cleaner includes a cylindrical port wall carried by a portion of a vacuum cleaner. The port wall has a first end facing inwardly toward the vacuum cleaner and a second end opposite the first end. The port wall defines a blower passage in communication with the plenum of the vacuum cleaner. A blower port outlet is provided on the second end of the port wall. A removable cap closes off the blower port outlet and has an exterior surface for gripping the cap and has a hub configured to fill the blower passage. The hub has a substantially smooth inner end face that is positioned generally across the first end of the port wall and faces the plenum of the vacuum cleaner.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: December 31, 2002
    Assignee: Shop-Vac Corporation
    Inventors: Robert C. Berfield, Ronald Griffin, Kevin Fry, Randy L. Buss
  • Patent number: 6494544
    Abstract: A wheel mounting system for a wet/dry vacuum cleaner is disclosed. A system provides a wet/dry vacuum cleaner base having a plurality of mounting surfaces extending therefrom. First and second wheels are mounted to first and second stub shafts which are inserted through at least two of the plurality of bearing surfaces and secured thereto using set screws. Flanges on outer ends of the stub shafts secure the wheels between the flanges and wheel wells extending from the base of the vacuum cleaner. A reinforcing shaft can be telescopingly received within the first and second stub shafts in order to enable the vacuum cleaner base to support relatively heavy loads.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: December 17, 2002
    Assignee: Shop Vac Corporation
    Inventors: Robert C. Berfield, Ronald Griffin, David Martinez
  • Publication number: 20020178533
    Abstract: A convertible blower port for a vacuum cleaner includes a cylindrical port wall carried by a portion of a vacuum cleaner. The port wall has a first end facing inwardly toward the vacuum cleaner and a second end opposite the first end. The port wall defines a blower passage in communication with the plenum of the vacuum cleaner. A blower port outlet is provided on the second end of the port wall. A removable cap closes off the blower port outlet and has an exterior surface for gripping the cap and has a hub configured to fill the blower passage. The hub has a substantially smooth inner end face that is positioned generally across the first end of the port wall and faces the plenum of the vacuum cleaner.
    Type: Application
    Filed: May 29, 2001
    Publication date: December 5, 2002
    Inventors: Robert C. Berfield, Ronald Griffin, Kevin Fry, Randy L. Buss
  • Patent number: 6485259
    Abstract: A vacuum cleaner includes a driven impeller that moves working air for the vacuum cleaner. A first housing includes a first wall and a second housing includes a second wall opposite the first wall, and an outlet for the working air. The impeller rotates and draws the working air through an opening and directs the working air radially outwardly toward the first wall and then through an annular passage formed between the first wall and the second wall. The annular passage restricts the flow of working air to provide back pressure on the impeller.
    Type: Grant
    Filed: July 24, 2001
    Date of Patent: November 26, 2002
    Assignee: Shop Vac Corporation
    Inventor: Robert C. Berfield
  • Patent number: 6481049
    Abstract: A vacuum cleaner has an electric motor driving an air impeller for creating a low pressure and a pump which draws liquid material through an inlet tube from the bottom of a tank and expels it from the tank. A priming apparatus is provided for priming the pump impeller. An outlet of the pump is connected to a discharge outlet carried by an upper vacuum assembly. Outlet piping connects the pump outlet to the discharge outlet. A pinch valve selectively closes the outlet piping to allow the priming apparatus to prime the pump. The pump and outlet piping are preferably carried by the upper vacuum assembly to facilitate conversion of the vacuum cleaner between wet and dry pick-up.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: November 19, 2002
    Assignee: Shop Vac Corporation
    Inventor: Robert C. Berfield
  • Patent number: 6481107
    Abstract: A two flail rotary flail feeding device includes a head having an annular line storage cavity, a central post and an annular line feeding passage extending from the cavity to the end of the post. Two flail lines are wound in the cavity, extend through the passage and are wound in a coil around the post. The ends of the flail lines extend outwardly from the post to form flails. Adjacent flail lines wound around the post are connected to each other and move together during lengthening of the flails.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: November 19, 2002
    Inventor: Robert C. Berfield
  • Patent number: 6478342
    Abstract: A swivel coupling for attachment to a hose. The swivel coupling comprises a sleeve defining an aperture sized to received a retainer clip. The hose is formed with convolutions so that the retainer clip may be attached to the hose. When the hose is inserted into the sleeve, the retainer clip may be inserted into the aperture to secure the hose against axial movement yet the allow the hose to swivel.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: November 12, 2002
    Assignee: Shop Vac Corporation
    Inventor: Robert C. Berfield
  • Publication number: 20020129498
    Abstract: A two flail rotary flail feeding device includes a head having an annular line storage cavity, a central post and an annular line feeding passage extending from the cavity to the end of the post. Two flail lines are wound in the cavity, extend through the passage and are wound in a coil around the post. The ends of the flail lines extend outwardly from the post to form flails. Adjacent flail lines wound around the post are connected to each other and move together during lengthening of the flails.
    Type: Application
    Filed: January 2, 2001
    Publication date: September 19, 2002
    Inventor: Robert C. Berfield
  • Patent number: 6451078
    Abstract: A fitting for a vacuum cleaner is disclosed. The fitting includes a retainer having first and second grooves within which a fitting is adapted to slide. The fitting includes a plate from which a cylinder extends and terminates in a radially inwardly directed deflector. Depending upon the orientation of the fitting within the retainer, the incoming fluid stream is directed in an upward or downward direction to thereby facilitate usage of the fitting with or without a vacuum bag, while at the same time minimizing the potential for splashing and expulsion of liquid drawn into the vacuum cleaner.
    Type: Grant
    Filed: December 19, 2000
    Date of Patent: September 17, 2002
    Assignee: Shop-Vac Corporation
    Inventors: Robert C. Berfield, Robert Lent Crevling
  • Patent number: 6440227
    Abstract: A vacuum cleaner capable of collecting wet or dry media includes a hose having an inlet end and an outlet end that is coupled to the vacuum cleaner. A motor is supported by a portion of the vacuum cleaner and applies a vacuum to the outlet end of the vacuum hose. A media inlet is positioned near the inlet end of the vacuum hose. An air intake for admitting air into the vacuum hose is provided near the media inlet. The air intake can be adapted to receive a detachable separate device in order to provide an air intake that is remotely positioned from the media inlet. Alternatively, the air intake can be provided on an attachment to or an integral part of the vacuum hose for providing the air intake at a remote distance from the media inlet. A distal end of the vacuum hose is immersed in a liquid to be collected so that the media inlet is immersed in the liquid and so that the air intake is exposed to a source of air.
    Type: Grant
    Filed: July 28, 2000
    Date of Patent: August 27, 2002
    Assignee: Shop-Vac Corporation
    Inventors: Robert C. Berfield, Alan Kaufman
  • Patent number: 6440191
    Abstract: A vacuum cleaner has a tank and a lid for closing off the tank. A motor/impeller unit is disposed inside the tank for generating an airstream. A filter support is attached to the lid and disposed inside the tank. A foam sleeve for removing liquid from the airstream is attached to the filter support. An air filter cartridge is removably attached to the filter support outside of the foam sleeve. The foam sleeve may remain in place as the filter cartridge is attached for dry pick-up or removed for wet pick-up. In addition, a drain hole is provided in the lid for draining liquid passing through the foam sleeve.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: August 27, 2002
    Assignee: Shop Vac Corporation
    Inventors: Robert C. Berfield, Li H. Liu
  • Publication number: 20020108204
    Abstract: A vacuum cleaner has an electric motor driving an air impeller for creating suction and a pump impeller which is located in the tank and draws liquid material from the bottom of the tank and expels it from the tank. The vacuum cleaner may have an electrical or mechanical shut-off apparatus which turns off the electric motor if the water level in the tank is too high. The shut-off switch may be bypassed by a user to allow the motor to continue driving the pump impeller to remove liquid from the tank.
    Type: Application
    Filed: February 19, 2002
    Publication date: August 15, 2002
    Applicant: Shop Vac Corporation
    Inventors: Randy L. Buss, Robert L. Crevling, Craig A. Seasholtz, Robert C. Berfield, James M. Robitaille
  • Patent number: D525114
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: July 18, 2006
    Inventor: Robert C. Berfield