An umbrella has a plurality of ribs attached to a runner by main struts. The umbrella has an anti-inversion mechanism formed of a plurality of anti-inversion struts. Each anti-inversion strut is pivotally coupled to one respective main strut and is pivotally connected to a floating joint member that is freely movable along a length of one respective rib. The anti-inversion mechanism also includes a stop that is fixedly attached to the rib and restricts the degree of travel of the floating joint member along the rib and is positioned to prevent the respective rib from inverting in response to an applied force.

An umbrella has a plurality of ribs attached to a runner by main struts. The umbrella has an anti-inversion mechanism formed of a plurality of anti-inversion struts. Each anti-inversion strut is pivotally coupled to one respective main strut and is pivotally connected to a floating joint member that is freely movable along a length of one respective rib. The anti-inversion mechanism also includes a stop that is fixedly attached to the rib and restricts the degree of travel of the floating joint member along the rib and is positioned to prevent the respective rib from inverting in response to an applied force.

An umbrella has a plurality of ribs attached to a runner by main struts. The umbrella has an anti-inversion mechanism formed of a plurality of anti-inversion struts. Each anti-inversion strut is pivotally coupled to one respective main strut and is pivotally connected to a floating joint member that is freely movable along a length of one respective rib. The anti-inversion mechanism also includes a stop that is fixedly attached to the rib and restricts the degree of travel of the floating joint member along the rib and is positioned to prevent the respective rib from inverting in response to an applied force.

An umbrella with a protective sheath assembly is provided. The umbrella can comprise a foldable canopy, a pole, a series of spokes extending from a hub slidable on the pole, the spokes supporting the canopy, a handle extended from the pole, and a foldable sheath selectively extendable from the canopy. A series of drawstrings can be provided for maintaining the sheath in a deployed state, the drawstrings connected to a cord for actuation of the drawstrings and consequently the deployment of the sheath. The protective sheath assembly provides partial to full body protection from inclement weather or natural elements including sun, wind, water, sand, mud, dirt, gravel, or other unwanted debris or dirt.

An umbrella with a protective sheath assembly is provided. The umbrella can comprise a foldable canopy, a pole, a series of spokes extending from a hub slidable on the pole, the spokes supporting the canopy, a handle extended from the pole, and a foldable sheath selectively extendable from the canopy. A series of drawstrings can be provided for maintaining the sheath in a deployed state, the drawstrings connected to a cord for actuation of the drawstrings and consequently the deployment of the sheath. The protective sheath assembly provides partial to full body protection from inclement weather or natural elements including sun, wind, water, sand, mud, dirt, gravel, or other unwanted debris or dirt.

A wheelchair having, in an embodiment, a frame, a seat, a plurality of wheels and an umbrella assembly. The umbrella assembly has a canopy, a canopy holder and a driving device. During opening, the canopy slides upward through the canopy holder and extends outward.

A wheelchair having, in an embodiment, a frame, a seat, a plurality of wheels and an umbrella assembly. The umbrella assembly has a canopy, a canopy holder and a driving device. During opening, the canopy slides upward through the canopy holder and extends outward.

An umbrella is formed of an elongated shaft having a first end and an opposite second end and a runner slidably disposed about the elongated shaft. The umbrella includes a rib assembly including a plurality of ribs that are attached to the runner by a plurality of struts that move between open and closed positions. In accordance with the present invention, the elongated shaft has a cross-sectional shape defined by a plurality of curved sections and a plurality of planar sections interspersed between the plurality of curved sections for providing increased torsional strength to the elongated shaft. At least one of the ribs can have a cross-sectional shape defined by a plurality of curved sections and a plurality of planar sections interspersed between the plurality of curved sections for providing increased torsional strength to the at least one rib.

An umbrella is formed of an elongated shaft having a first end and an opposite second end and a runner slidably disposed about the elongated shaft. The umbrella includes a rib assembly including a plurality of ribs that are attached to the runner by a plurality of struts that move between open and closed positions. In accordance with the present invention, the elongated shaft has a cross-sectional shape defined by a plurality of curved sections and a plurality of planar sections interspersed between the plurality of curved sections for providing increased torsional strength to the elongated shaft. At least one of the ribs can have a cross-sectional shape defined by a plurality of curved sections and a plurality of planar sections interspersed between the plurality of curved sections for providing increased torsional strength to the at least one rib.

A rope guiding device includes a base seat, two limiting link assemblies connected to the base seat, and a limiting rope. Each of the limiting link assemblies has a retaining space therein, and a guiding groove in spatial communication with the retaining space. The limiting rope includes two head pieces respectively and movably retained in the retaining spaces of the limiting link assemblies, and a rope body having two opposite end portions that respectively extends through the guiding grooves of the limiting link assemblies and that are respectively connected to the head pieces. Each of the head pieces has a width greater than the width of each of the guiding grooves and the width of the rope body.