Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing
Reexamination Certificate
1999-10-07
2001-01-09
Cuomo, Peter M. (Department: 3636)
Tent, canopy, umbrella, or cane
Umbrella
Self-opening and closing
C135S022000
Reexamination Certificate
active
06170498
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a multiple-fold automatic umbrella and particularly to an improved multiple-fold automatic umbrella that has low production cost and high durability.
2. Background of the Invention
Conventional multiple-fold automatic umbrella (such as the four-fold one shown in
FIG. 1
) basically adapts and expands the structural design of the two-fold or three-fold automatic umbrella. It mainly includes a central shaft means A consisting of four telescopic tubes; a rib assembly B constituting at least: a top rib c pivotally engaged with an upper notch D located at the top end of the central shaft means A, a stretcher rib E pivotally engages with the top rib c and a lower runner F slidably engaged with the central shaft means A, a middle rib G engaged with an outer rib J by means of an outer resilient rib H and an outer connection rib I, the middle rib G further has one end engaging with the stretcher rib E and the top rib c through an inner connection rib K and another end engaging with an inner resilient rib L and the outer connection rib I; an extending spring M located in the central shaft means A for opening the umbrella, a plurality of retracting springs N located in the rib assembly B for closing the umbrella; and a control means P including an upper guide roller Q pivotally located at an upper portion of the central shaft means A, a lower guide roller R pivotally located in the lower runner F and top guide rollers S and X pivotally located at the top end of the central shaft means A for winding a rope T among the rollers to form a multiple-fold automatic umbrella mechanism. The rope T has an inner end fixed on a rod U axially located in the central shaft means A and another end winding through an upper shaft V and the central shaft means and the upper guide roller Q held in an inner block W located at the top portion of the central shaft means, then winding downward around the lower guide roller R and extending upward again to wind around the top guide rollers S and X, and finally winding downward again to engage with the lower runner F. The winding rope T has to change direction several times. The inner block W is small size but has to contain three rollers. The whole assembly becomes bulky. There are many components and is difficult to assemble. The inner connection rib K usually is made by punching a metallic sheet. It is large size and increases cost. The whole design and structure is against the contemporary design concept and trend which focuses small size and light weight.
SUMMARY OF THE INVENTION
In view of the aforesaid disadvantages, it is therefor an object of this invention to provide an improved multiple-fold automatic umbrella that includes a telescopic central shaft means, a rib assembly, a grip, a control means, an extending spring and a plurality of retracting springs in which the central shaft means has a low friction and high wearing resistance rope guide located at the top end of the inner block to replace the upper and top guide rollers used in the conventional multiple-fold umbrella and may result in easy assembling, lower cost, smaller size and enhanced durability.
It is another object of this invention to provide an improved multiple-fold automatic umbrella in which the inner connection rib for connecting the top rib and middle rib and for engaging with the retracting spring is made of metallic wire rather than a metallic bar made by punching for achieving smaller size and lower cost.
REFERENCES:
patent: 5178174 (1993-01-01), Wu
patent: 5617889 (1997-04-01), Wu
patent: 5626160 (1997-05-01), Ko
patent: 5645094 (1997-07-01), Wu
patent: 5823215 (1998-10-01), Chou et al.
patent: 6016822 (2000-01-01), Lin et al.
Anderson Jerry
Cuomo Peter M.
Dougherty & Troxell
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