Patents Assigned to Caleffi S.p.A.
  • Patent number: 10428499
    Abstract: A backflow preventer for water distribution installations includes a body having an inlet conduit arranged along an inlet axis, an outlet conduit arranged along an outlet axis, and a discharge conduit arranged along a discharge axis of the body. The backflow preventer is provided with check valves that prevent a backflow of fluid from the outlet to the inlet in the event of low pressure upstream of the backflow preventer and/or high pressure downstream of the backflow preventer. The backflow preventer further includes a discharge valve arranged along the discharge axis of the body of the backflow preventer for discharging fluid in the low and/or high pressure conditions. A discharge pipe is connected to the discharge valve to discharge the fluid outside the backflow preventer along an end discharging axis of the fluid outside the backflow preventer.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: October 1, 2019
    Assignee: Caleffi S.p.A.
    Inventor: Marco Caleffi
  • Patent number: 9925543
    Abstract: A magnetic particle separator (10) suitable for separating magnetic and non-magnetic particles from a thermal fluid flowing in a heating system. The magnetic particle separator (10) comprises a hollow body (10A, 10B) configured with an upper particle separation chamber (11) and for circulation of the thermal fluid between an inlet and an outlet port (12, 13), and a quieting chamber (15) beneath the particle separation chamber (11) for accumulation of the particles separated from the fluid: an annular support element (21) for permanent magnets (18) being removably fastened outside the quieting chamber (15) of the separator (10).
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: March 27, 2018
    Assignee: CALEFFI S.P.A.
    Inventor: Marco Caleffi
  • Publication number: 20140367340
    Abstract: A magnetic particle separator (10) suitable for separating magnetic and non-magnetic particles from a thermal fluid flowing in a heating system. The magnetic particle separator (10) comprises a hollow body (10A, 10B) configured with an upper particle separation chamber (11) and for circulation of the thermal fluid between an inlet and an outlet port (12, 13), and a quieting chamber (15) beneath the particle separation chamber (11) for accumulation of the particles separated from the fluid: an annular support element (21) for permanent magnets (18) being removably fastened outside the quieting chamber (15) of the separator (10).
    Type: Application
    Filed: February 2, 2012
    Publication date: December 18, 2014
    Applicant: CALEFFI S.P.A.
    Inventor: Marco Caleffi
  • Patent number: 8474446
    Abstract: A solar collector includes a first header, a second header and one or more riser tubes that connect the first header and second header. The solar collector is mounted to a surface, e.g., a roof, such that the headers are substantially parallel to a horizontal axis. The first header is curved so as to define a low point that facilitates drainage of liquid from the solar collector.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 2, 2013
    Assignee: Caleffi S.p.A.
    Inventors: Robert M. Rohr, Max J. Rohr
  • Patent number: 8327867
    Abstract: An antifreezing valve device for hydraulic and/or water storage systems includes a valve body having a water inlet and outlet which open into a chamber housing a linear thermostatic actuator, and a closing member operatively connected to the thermostatic actuator to be moved from a closed position for closing a sealing seat for ambient temperatures equivalent to or higher than a preset value, to an open position for discharging water from a system for lower ambient temperatures; the closing member is conformed with a cup-shaped support element sealingly slidable along the cylindrical body of the actuator, in order to define with this a closed chamber into which extends the actuator control rod. The device also includes first and second biasing spring members acting at opposite ends of the housing chamber on the closing member, respectively on the linear actuator, and guide element for sliding of the linear actuator and of the closing member.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: December 11, 2012
    Assignee: Caleffi S.p.A.
    Inventor: Marco Caleffi
  • Publication number: 20100108152
    Abstract: An antifreezing valve device for hydraulic and/or water storage systems includes a valve body having a water inlet and outlet which open into a chamber housing a linear thermostatic actuator, and a closing member operatively connected to the thermostatic actuator to be moved from a closed position for closing a sealing seat for ambient temperatures equivalent to or higher than a preset value, to an open position for discharging water from a system for lower ambient temperatures; the closing member is conformed with a cup-shaped support element sealingly slidable along the cylindrical body of the actuator, in order to define with this a closed chamber into which extends the actuator control rod. The device also includes first and second biasing spring members acting at opposite ends of the housing chamber on the closing member, respectively on the linear actuator, and guide element for sliding of the linear actuator and of the closing member.
    Type: Application
    Filed: October 30, 2009
    Publication date: May 6, 2010
    Applicant: CALEFFI S.P.A.
    Inventor: Marco CALEFFI
  • Patent number: 7617989
    Abstract: Thermostatic control device for controlling valves provided with an axially movable stem, includes a base body, an electrically operated thermostatic actuator, and intermediate connecting elements between the thermostatic actuator and the stem of the valve; the device also includes a cap assembly, having a cylindrical portion secured to the base body, and a control knob, movably supported by the cylindrical portion, the knob being operatively connected to the stem of the valve. The cylindrical portion and the knob have cam elements conformed to cause an axial movement of the knob by its manual rotation; the device also includes disengageable retaining elements for retaining the knob in an open position of the valve, and torsional spring elements for automatically returning the control knob to a closed position of the valve upon disengagement of the retaining elements from the knob.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: November 17, 2009
    Assignee: Caleffi S.p.A.
    Inventor: Marco Caleffi
  • Patent number: 7246635
    Abstract: An automatic flow rate control valve, includes a tubular body, defining a flow path between inlet apertures having a gradually variable cross-sectional area and a fluid outlet at one end; a flow control piston is axially movable within the tubular body, under opposite actions of the fluid pressure and a biasing spring, to choke the fluid inlet apertures, while maintaining a constant flow rate. The control piston is in the form of a first cup-shaped element sliding on a second cup-shaped element to define a hydraulic damping chamber, communicating with the flow path.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: July 24, 2007
    Assignee: Caleffi S.p.A.
    Inventor: Marco Caleffi
  • Patent number: 7048251
    Abstract: A valve assembly includes a valve body and a valve actuator which is releasably engageable with the valve body. The valve body has an internal cavity within which a valve member is located, and a valve stem is interconnected with the valve body and is accessible from the exterior of the valve body. The valve body further includes a mounting member, and the valve actuator is selectively engageable with the mounting member. The valve actuator includes a latch member which is movable between a latching position and a release position. The mounting member includes a slot, and the latch member has a blocking member that is received within the slot when the latch member is in its latching position, to prevent removal of the valve actuator from the valve body. The latch member is manually movable to a release position, in which the blocking member is removed from the slot in the mounting member to enable the valve actuator to be disengaged from the mounting member.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: May 23, 2006
    Assignee: Caleffi S.p.A.
    Inventor: Michael R. Schreiner
  • Publication number: 20060021658
    Abstract: An automatic flow rate control valve, includes a tubular body, defining a flow path between inlet apertures having a gradually variable cross-sectional area and a fluid outlet at one end; a flow control piston is axially movable within the tubular body, under opposite actions of the fluid pressure and a biasing spring, to choke the fluid inlet apertures, while maintaining a constant flow rate. The control piston is in the form of a first cup-shaped element sliding on a second cup-shaped element to define a hydraulic damping chamber, communicating with the flow path.
    Type: Application
    Filed: July 15, 2005
    Publication date: February 2, 2006
    Applicant: CALEFFI S.P.A
    Inventor: Marco Caleffi
  • Patent number: 5510167
    Abstract: A cover is disclosed which is formed from a non-elasticized cloth provided with stitchings of elastic yarns stretched across the cloth back and attached thereto to form a quadrilateral mesh net.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: April 23, 1996
    Assignee: Caleffi - S.p.A.
    Inventors: Francesco M. Candolfi, Claudio DeFelice
  • Patent number: D820392
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: June 12, 2018
    Assignee: Caleffi S.p.A.
    Inventor: Marco Caleffi
  • Patent number: D835754
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: December 11, 2018
    Assignee: Caleffi S.p.A.
    Inventor: Marco Caleffi