Tent – canopy – umbrella – or cane – Umbrella – Having quick assembly feature
Patent
1991-03-29
1991-12-03
Chilcot, Jr., Richard E.
Tent, canopy, umbrella, or cane
Umbrella
Having quick assembly feature
135 39, 135 43, A45B 1300
Patent
active
050692372
ABSTRACT:
A disposable umbrella apparatus is made of thermoplastic and inexpensive materials and has a central staff made of a length of plastic pipe. Three short plastic dowels are mounted perpendicular through the staff and a plastic cap mounts to the top of the pipe to act as a stop for a fixed upper collar supporting the fixed struts of the umbrella and as a latch for a slidable collar carrying the collapsing umbrella struts. The slidable collar has an opening therethrough and slides along the staff pipe and the latching for the umbrella uses a pair of grooves along the inside of the opening the slidable collar so that the collar can slide over one of the plastic dowels protruding from the staff and abut against a second dowel protruding from the staff and then rotated between the two dowels to latch the collars and struts in position to hold the umbrella in an open position. The collar is thus rotated to misalign the grooves with respect to the dowel on either side thereof to prevent movement past the dowels in either direction. The waterproof covering for the umbrella may be thermoplastic sheet heat sealed in place on the struts.
REFERENCES:
patent: 171802 (1876-01-01), Hatch
patent: 291090 (1884-01-01), Saxe
patent: 355142 (1886-12-01), Crabtree
patent: 737787 (1903-09-01), Shepherd
patent: 1096216 (1914-05-01), Beehler
patent: 1145285 (1915-07-01), Williamson
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patent: 3177882 (1965-04-01), Militano
patent: 3424180 (1969-01-01), Andofi
patent: 3921655 (1975-11-01), Weber
patent: 4033366 (1977-07-01), Forget
patent: 4567907 (1986-02-01), Dubinsky
patent: 4821756 (1989-04-01), England
patent: 5020557 (1991-06-01), Apple
Chilcot Jr. Richard E.
Hobby III William M.
Mai Lan
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