Plastic laboratory boiler
AssigneeIntertec Associates, Inc.
InventorsLouis A. Conant, Wilbur M. Bolton, James E. Wilson
Life of this patent
Estimating the term…
Abstract
A boiler having an improved plastic closure having a plastic and/or plastic-glass joint for connecting laboratory ware made of a material having different thermal expansion. The plastic joint includes a tubular plastic section having a compression ring secured at its end which recesses the labware of lower thermal expansion. The plastic-glass joint further includes a shorter standard tapered glass joint.
Claims12
In a plastic laboratory boiling vessel suitable for interconnection to laboratory glassware, the improvement comprising, a plastic top closure for said vessel, with at least one composite plastic outer joint attached through a section of said closure, said at least one joint providing an interconnecting passageway for fluids from an interior of said vessel through said closure to a piece of laboratory glassware, said at least one joint comprising a generally tubular plastic section of outer standard taper geometry having a lower end and an upper end, and a constraining compression ring made of a material having a lower thermal expansion than said at least one plastic joint, attached to and circumferentially surrounding the upper end of said plastic section, said ring having a loose fit at room temperature, with the lower end of said at least one plastic joint being attached through the section of the top closure of said vessel.
In a plastic laboratory boiling vessel suitable for interconnection to laboratory glassware, the improvement comprising, a plastic top closure for said vessel, with at least one composite plastic glass joint attached through a section of said closure, said at least one joint providing an interconnecting passageway for fluids from an interior of said vessel through said closure to a piece of laboratory glassware, said at least one joint comprising a generally tubular plastic section having a lower end and an upper end with the upper end attached to and surrounding a lower stem end of an outer standard taper glass joint by means of a compression ring made of a material having a lower thermal expansion than said plastic section, said ring tightly sealing said upper end of said plastic section to the lower stem end of said outer standard taper glass joint, for interconnection to the inner joints of standard taper laboratory glassware, with the lower end of said at least one plastic joint being attached through the section of the top closure of said vessel.
Dependencies are inferred from the claim text.