David L Luedtke

US Patent:

20040171343, Sep 2, 2004

Filed:

Feb 28, 2003

Appl. No.:

10/376170

Inventors:

David Luedtke - Los Altos CA, US

International Classification:

B60H001/00
A47C007/74

US Classification:

454/120000

Abstract:

The present invention relates to a seat or chair cooling apparatus. In an embodiment the seat cooling apparatus cools the back of a user without the need of forced air. The seat cooling apparatus includes an array of conduits held in place by a set of supports to form a heat exchanger. Heat from the contact surfaces is removed by free convection, an upward air movement due to density difference. When the seat cooling apparatus is in the preferred substantially vertical arrangement, the warm air exiting the conduits is replaced by cooler air entering the conduits. A seat securing attachment secures the heat exchanger components to a seat. The seat cooling apparatus shapes into the back of the user to provide comfort that is effective in cooling. The seat cooling apparatus can be light weight, portable, and occupies little space, can be quickly installed and removed, easily cleaned and is very low cost to manufacture. In another embodiment, the seat cooling apparatus is easily connected to a forced air cooling source to increase the cooling rate if desired by the user.

US Patent:

20040173649, Sep 9, 2004

Filed:

Mar 5, 2003

Appl. No.:

10/382558

Inventors:

David Luedtke - Los Altos CA, US

International Classification:

A45F003/14
A45F004/00
A45C015/00

US Classification:

224/258000, 224/578000

Abstract:

The present invention is a transport device for bulky objects such as boogie boards, surfboards and snowboards having an existing anchored attachment on the board. In an embodiment, a strap is strapped around the boogie board, and the anchored leash is linked to the strap forming a shoulder carrying strap. In another embodiment, a strap holds a plurality of boogie boards together and the individuals leash form a shoulder strap to be carried at the same time. In another embodiment, a strap takes the form of an elastic cord with hooks (e.g. a bungee cord) forming a shoulder strap with the anchored board leash. This strap carry system can be extended to other applications beyond boogie board, surf board, snowboard, skis and any objects where there is an anchored attachment.

US Patent:

20050207275, Sep 22, 2005

Filed:

Mar 19, 2004

Appl. No.:

10/804753

Inventors:

David Luedtke - Los Altos CA, US

International Classification:

B01F013/00

US Classification:

366343000

Abstract:

The present invention relates to a mixing and stirring device suitable for stirring food. In an embodiment, the mixing and stirring device includes a shaft with a locking jig to fit into a kitchen appliance electric mixer and a substantially cylindrical shaped auger stirring head extending laterally from the shaft, wherein the auger stirring head includes twisted surfaces cut on anti-parallel surfaces forming a set of blade edges. The auger stirring head also has concave surfaces to generate uplift movements and blade edges to drill and cut solid content food without causing spillage. The cross-section of the shaft may be rectangular, triangular and circular. The mixing and stirring device may be coated for protection from scratches, corrosion, and for easy cleaning. In another embodiment, the stirring head is a tear drop shape. In yet another embodiment, the mixing and stirring device is a disposable hand stirring and mixing device.