Patents Assigned to Marin Tek, Inc.
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Patent number: 5161382Abstract: Apparatus for producing low temperature refrigeration comprising a refrigeration sub-system for circulating a first refrigerant to provide alternately two outputs for different time periods including a first output at a relatively warm temperature level and a second output at a relatively cold temperature level. The sub-system outputs are furnished to a cryosorption pumping circuit comprised of a closed loop conduit for a second refrigerant and connected to a plurality of sorbent beds which cause cyclic adsorption and desorption of the second refrigerant material. External conditioning utilizing the first refrigerant is used to cause further temperature reduction of said second refrigerant in the closed loop conduit of the cryosorption pumping circuit.Type: GrantFiled: May 24, 1991Date of Patent: November 10, 1992Assignee: Marin Tek, Inc.Inventor: Dale J. Missimer
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Patent number: 5009073Abstract: An elongated fast cycle cryopump device connected to a refrigerant source has a rigid head section adapted to extend through a pass-through opening of a vacuum chamber. The head end section has a feed tube and a return flow passage, the feed tube being connected to a valve for selectively receiving either a relatively cold refrigerant or a relatively hot refrigerant during different phases of operation. A flexible probe section connected to the rigid head end section is capable of being shaped in different ways to assume a preselected or variable configuration within the vacuum chamber workspace and includes a flexible feed tube connected to the feed tube of the head end section for carrying the refrigerants passing through the head section outwardly to the end of the flexible probe section. A flexible outer tubular member surrounding the flexible feed tube provides a return passage for the refrigerants along the flexible probe section and through the head section.Type: GrantFiled: May 1, 1990Date of Patent: April 23, 1991Assignee: Marin Tek, Inc.Inventors: Dale J. Missimer, David T. Fyfe, Jr., Joseph J. Housman, Scott M. Forrest
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Patent number: 4763486Abstract: The disclosure relates to a closed refrigeration system wherein refrigerant travelling between heat exchangers in the system is diverted to the evaporator in response to operation of a controller which responds to the temperature at the evaporator. Preferably the diverted refrigerant is the liquid phase thereof, separation of the liquid from the gaseous phase taking place between heat exchangers in a preferred embodiment of the invention. When the temperature at the evaporator is at a predetermined value, the controller can shut off the refrigerant diverting portion of the system to provide standard system operation.Type: GrantFiled: May 6, 1987Date of Patent: August 16, 1988Assignee: Marin Tek, Inc.Inventors: Scott M. Forrest, Michael R. St. Pierre
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Patent number: 4689964Abstract: The disclosure relates to a refrigeration system using a multi-component refrigerant wherein the heat exchanger/phase separator can be positioned in any orientation and does not operate due to gravitational forces. This is accomplished by providing a constriction at the upstream end of the refrigerant path with a capillary tube entry slightly upstream of the constriction, the amount of liquid refrigerant striking the constriction being sufficient to provide an effective liquid seal at the opening to the capillary tube to prevent gaseous refrigerant from entering thereinto.Type: GrantFiled: April 2, 1986Date of Patent: September 1, 1987Assignee: Marin-Tek, Inc.Inventor: Michael St. Pierre
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Patent number: 4597267Abstract: The disclosure relates to a refrigeration system wherein the evaporator of the refrigeration system is placed within a vacuum system as a "Meissner" coil previously described. Optionally it may be provided with extended surface(s). The cryosurface has a single tube passage for flow of either an evaporating low temperature refrigerant fluid for cooldown and continuous cold operation, or superheated compressed refrigerant gas for adding heat during the defrost cycle. Appropriate valves select whether cold fluid or superheated refrigerant gas flows through the tube in the cryosurface. A recuperative heat exchanger and a superheating exchanger preheat, in two stages, a cold compressed refrigerant gas stream after the gas has been rectified within the system. This superheated gas stream defrosts the cryosurface, flows back through the recuperative heat exchanger where it is recooled and then is reintroduced into the cold cascade heat exchangers.Type: GrantFiled: June 28, 1985Date of Patent: July 1, 1986Assignee: Marin Tek, Inc.Inventor: Scott M. Forrest
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Patent number: 4535597Abstract: The disclosure relates to a closed circuit refrigerator having both rapid heating/defrost and cooling rates for the cryosurface and which operates on a continuous basis. The system is based upon a refrigeration process of the type which employs compression of a mixture of vapor refrigerant components with partial condensation and partial evaporation with steps of intermediate cooling and at least partial phase separation. The evaporator of the refrigeration system is placed in a vacuum system as a "Meissner" coil. The cryosurface has, thermally coupled thereto, both a defrost tube and an evaporator tube, the defrost tube carrying refrigerant fluid therein at raised temperature when made operational during a defrost cycle and the evaporator tube carrying low temperature refrigerant fluid therein when made operational during a cool down operation. Appropriate valves determine the refrigerant fluid both, i.e., through cooling heat exchangers or through a heating heat exchanger.Type: GrantFiled: January 25, 1984Date of Patent: August 20, 1985Assignee: Marin Tek, Inc.Inventors: Dale J. Missimer, Michael R. St. Pierre