Sanwa has been granted a patent for a method of heating a door guide area. The method involves channeling heated air through two conduits in different directions, transferring heat to an external space, and ensuring a roll-up door’s side portion is heated when closed. GlobalData’s report on Sanwa gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Sanwa, Tunnel Rescue/Safety Devices was a key innovation area identified from patents. Sanwa's grant share as of July 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.
Heating method for roll-up door guide area
The patent US12071812B2 outlines a method for effectively heating a door guide area, particularly for roll-up doors. The method involves channeling heated air through two conduits in different longitudinal directions, with the first conduit directing air in a first direction and the second conduit in a different, potentially opposite direction. Heated air is supplied from a heater, which routes the air laterally from the first conduit to the second. This setup allows for the transfer of heat from the heated air in the second conduit to a designated heated space outside the conduits, ensuring that a side portion of the roll-up door remains in this heated area when closed.
Further claims detail enhancements to the basic method, including the incorporation of heat transfer fins that extend into the heated air flow, which can be attached to a heat transfer wall. This wall partially defines the heated space, facilitating efficient heat transfer. The patent also specifies that nearly all heat transferred to the heated space comes directly from the heat transfer wall. Additional features include the circulation of heated air between the conduits and the distribution of heat along the length of the fins. The method also allows for the return of air from the first conduit back to the heater after it has passed through both conduits, promoting a continuous heating cycle.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
