Tent – canopy – umbrella – or cane – Portable shelter – Plural shelters – shelter having plural compartments – or...
Reexamination Certificate
2005-01-05
2008-08-05
Dunn, David R (Department: 3636)
Tent, canopy, umbrella, or cane
Portable shelter
Plural shelters, shelter having plural compartments, or...
C135S121000, C135S115000, C135S120400
Reexamination Certificate
active
07406977
ABSTRACT:
The present invention is an improved tensioned canopy shelter of the type used by backpackers. The canopy of the new shelter has a lower rear support and a higher front pole support with a horizontal ridge strut. The ridge strut spreads the forward end of the canopy's ridgeline into a catenary-tensioned panel, with dual catenary curves running from the ends of the ridge strut to the rear end of the canopy. The horizontal ridge strut can be supported by a single central upright pole, or it can alternately be supported at its ends by spaced upright poles for even greater stability and easier entry and exit through the front of the shelter, for example using two trekking-type poles. In the preferred form the ridge strut is provided with pole connections to allow either the single- or double-pole options. In a further preferred form, the ridge strut is removably held in a sleeve in such a manner that it may either be left in place or removed when the shelter is rolled up for storage. In yet a further form, the ridge strut provides structural support for an adjustable ventilation flap.
REFERENCES:
patent: 602587 (1898-04-01), Phelps
patent: 1057628 (1913-04-01), Eberhardt
patent: 2258084 (1941-10-01), Baker
patent: 3060949 (1962-10-01), Moss
patent: 4719934 (1988-01-01), Mydans
patent: 4829694 (1989-05-01), Oasheim
patent: 4941422 (1990-07-01), Muller
patent: 5197505 (1993-03-01), Tate
patent: 5477876 (1995-12-01), Moss
patent: 6289834 (2001-09-01), Phillips
patent: 2001/0042563 (2001-11-01), Coupounas
patent: 2002/0134415 (2002-09-01), Boulange
Tarptent, Ultralight Shelters, website catalog pages showing 2003 model shelters, 7 pages, www.tarptent.com, Redwood City, California, U.S.
Abraham Tania
Dunn David R
Northern Michigan Patent Law PLC
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