Tent – canopy – umbrella – or cane – Portable shelter – Framework
Reexamination Certificate
1999-05-13
2001-09-04
Canfield, Robert (Department: 3635)
Tent, canopy, umbrella, or cane
Portable shelter
Framework
C135S147000, C135S159000, C135S160000, C135S130000
Reexamination Certificate
active
06283136
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to collapsible tents, which can be used as outdoor products in parks, courtyards, sea beaches, field living, vendor's mobile stands, army camping, nomadism, geologic surveys, etc.
BACKGROUND OF THE INVENTION
Most of the tents, which are used in field living, army camping, parks, courtyards, vendor's mobile stands, etc., are assembled on site with separate parts, which makes the use thereof trouble, the operation thereof time-consuming and laboursome, and the carry thereof inconvenient. Although some foldable tents have been commercially available recently, none of them can meet the various requirements of different application situations.
U.S. Pat. No. 4,607,656 discloses a quick-erect collapsible shelter having four or more telescoping legs, connected by a framework which includes pluralities of X-shaped linkages and a slider on each leg to provide interconnecting truss between the legs and support for a covering canopy. The known shelter can not withstand the rigors of weather and other environmental effects, and are so complex that the design thereof is not reasonable.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a collapsible tent which has a simple, compact and firm structure with few structural members, can be operated when being expanded or collapsed, and can be carried conveniently in a collapsed state.
Another object of the present invention is to provide a collapsible tent, which can be expanded or collapsed interlockingly by separating or closing legs thereof with all other movable members of the tent moving synchronously to expand or collapse the tent.
The collapsible tent according to the present invention comprises top connecting means at the top of the tent; a plurality of upright legs; a slider slideably received on each upright leg; upper roof support bars which are pivotally connected at the upper ends thereof to the top connecting means; lower roof support bars which each are connected at one end to its respective upper roof support bar and at the other end to a top of its respective upright leg; stay bars which each are connected at one end to its respective lower roof support-bar and at the other end to the slider; a parallel bar assembly interconnecting adjacent ones of the upright legs, each parallel bar assembly having a T shaped connecting member, upper parallel bars each of which is pivotally connected at one end to the vertical leg of the T shaped connecting member and at the other end to the upper end of its respective leg, and lower parallel bars each of which is pivotally connected at one end to its respective flange of the T shaped connecting member and at the other end to the upper end of its respective leg; stay bars for supporting the lower support bar, each stay pivotally connected at one end to the upper part of its respective lower roof support bar and at the other end to the slider; stay bars for supporting the parallel bar assembly, each stay bar pivotally connected at one end to its respective lower parallel bar and at the other end to the slider; and stop means for maintaining the slider in position to maintain the tent in an erected position.
REFERENCES:
patent: 1846011 (1932-02-01), Adams
patent: 2130919 (1938-09-01), Erickson et al.
patent: 2135961 (1938-11-01), Chenworth
patent: 2723673 (1955-11-01), Call
patent: 2771896 (1956-11-01), Call
patent: 3085586 (1963-04-01), McDonough
patent: 4641676 (1987-02-01), Lynch
patent: 5035253 (1991-07-01), Bortles
patent: 6173726 (2001-01-01), Talmadge
patent: 218685 (1961-12-01), None
Canfield Robert
Seed Intellectual Property Law Group PLLC
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