The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 1997
Filed:
Mar. 15, 1995
Fisher & Paykel Limited, Auckland, NZ;
Abstract
A humidifier conduit has an enclosed helical passageway in the wall thereof to provide an insulating barrier against heat transfer from the inside of the conduit to the outside of the conduit. The conduit may include at least one heating means hectically disposed between the inner wall and outer wall of the conduit to assist in the retention of a desired gases temperature in the humidified air flow which is to flow through the conduit in use. The conduit preferably is constructed by helical winding of a unit profile and bonding of adjacent turns of the helically wound profile to form the conduit, the unit profile including complementary connecting means so that adjacent turns of the helically wound profile are securely connected to form the conduit. The unit profile may include an overlapping member to overlap adjacent turns of the profile and act in an armadillo-like fashion to ensure flexibility of the conduit, while retaining the insulative properties of the double wall and enclosed helical passageway.