Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids
Reexamination Certificate
2001-03-19
2002-12-03
Mai, Lanna (Department: 3637)
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
C135S071000, C135S080000, C135S077000, C135S066000, C248S155100
Reexamination Certificate
active
06488042
ABSTRACT:
The invention relates generally to walking canes, and more particularly to walking canes having a handle that has articulating elements.
BACKGROUND
Walking canes, also know as walking sticks, have a colorful history of being modified to secretly house guns and switchblades. In addition to these romantic adaptations there have been a number of practical improvements. One such example is Mason's “Pickup Cane”, disclosed in U.S. Pat. No. 2,346,038, which is a walking cane that has an articulating “finger” at the tip of the cane. The “finger”, which is normally recessed in the shaft, can be actuated using a trigger in the handle to grasp items at the tip of cane, therein eliminating the need for the user to have to bend or stoop down. Another example of a walking cane having a practical improvement is disclosed by Van Helvoort in U.S. Pat. No. 5,755,245. Van Helvoort's invention is a cane that can be made self-standing. The shaft of the cane has small legs near the tip that can be sprung outward by depressing a button near the base of the handle. The button unlocks a spring loaded two piece shaft causing the shaft to telescope, and on telescoping the legs rotate outward. To reposition the legs back in the shaft, the cane has to be reloaded by compressing the shaft together, and this action causes the legs to rotate upward back into a recess in the shaft.
An improved invention would be a self-standing cane that didn't elongate when the supporting elements are deployed, and that could not automatically deploy if a button is accidentally pushed. While the concept of a button is appealing, the practical advantages of automatic deployment of the supporting legs, when weighed against the frequency of the need to do so and the difficulty of retrieving the legs, for most people probably does not offset the conveniences especially in light of a heightened accidental risk associated with an unplanned deployment. Another consideration is the safety of the deployed legs. Ideally, the legs should be blunt in the event that someone inadvertently fell on to the cane. Additionally, pointed legs will tend to puncture a surface rather than be supported by it, so that sharp legs would tend to penetrate an earthen surface. A third consideration is the weight and styling of the walking cane. If the walking cane is too heavy to be easily carried, then people will quickly give it up. An example of a very stable, heavy, multi-legged cane is illustrated by DiCarlo's invention, U.S. Pat. No. 4,997,001. A self-standing walking cane that is conventional in appearance and relatively light weight is desired. Furthermore, a preferred cane would be one that is not only a walking aid and self-standing, but also a cane that has ergonomic features. Specifically, ergonomic features would include a handle that is easy to grip and a grip that could have potential health benefits to the user's hand. A walking cane having recreational utility would also be a valuable feature. By way of illustration, Richter discloses his invention in U.S. Pat. No. 5,871,025, where Richter's cane converts to a portable chair. These chairs/canes are often carried to golf tournaments.
DESCRIPTION OF THE INVENTION
The Invention is a walking cane having a multifunctional handle. The handle is comprised of a base and a pair of articulating elements, a right element and a left element, where the elements are hingedly connected to the base. The elements can be articulated as a pair or separately, having an angular motion that is substantially opposite in rotation, and radial from a centerline of the base. On a bottom face of the base, the base is fitted with a reducing connector which rigidly attaches the base to a longitudinal perpendicular member. The longitudinal member is a shaft of the walking cane, and it is normally a straight section. The handle, having a shape which could be generally described as an ellipsoidal cylinder, is sized and optimized in curvature so as to easily fit a hand. The handle is functionally, and by all cursory appearances solid in form, when the handle is in the unified, collapsed form. The base and the pair of articulating elements are derivative subsections of the handle. The right element is generally an elongated polyhedron having a curved-side and two straight sides that intersect at a right angle; where the straight sides form close fitting interior walls that are in contact with opposing walls of the base. The ends of the polyhedron are complex, with the anterior end being rounded and suitable for angular rotation, and the posterior end being blunt with an interior indentation suitable for as a pry point. The polyhedron is sectioned out of the handle lengthwise. The left element is the mirror image of the right element. The base is a larger, remaining section. The anterior end of the right element is hingedly connected to the base by an axial pin that projects upward from a right shelf of the base, where the pin is coaxial to the axis of the shaft, and the pin is near the anterior end of the right shelf. The pin is centered and slightly offset from the anterior end of the shelf, said arrangement of right shelf, right pin and right element enabling the right element to pivot off the shelf. The left element is connected similarly to an opposing, left pin. Viewed from the top, the right element can rotate counterclockwise in a plane that is parallel to the bottom face of the right shelf of the base. The arc swept by the rotation is approximately 120 degrees. Rotation is constrained where the right element abuts the anterior end of the right shelf. Visually, the motion of the right element is not dissimilar from the motion of a flapping right wing of a bird. The left element pivots clockwise in an opposing fashion. The right shelf and the left shelf of the base are separated by a spine that runs longitudinally down the centerline of the base. At the posterior end of the right element, embedded in the face of the interior straight side of the right element, is a right magnet. Opposing the right magnet, located in a posterior portion of the spine of the base, is a magnetic component. The magnetic component is preferably a magnet of opposing polarity or a magnetizable metal. The left element is configured similarly. The close proximity of the magnets to the hand could have some therapeutic value.
The instant invention serves as a normal walking cane with the handle in the unexpanded mode. There are three expanded modes. In the fully expanded mode the pair of elements are articulated outward, angularly, and the handle transforms into a tripod. The cane can then be inverted and it will stand upright on its on.
In the partially expanded mode, only one of the elements is articulated, and the cane be laid on its side. The partially expanded mode has the advantage that only a minimum portion of the handle will come in contact with the ground. If the ground is wet the handle stays dry.
In the unexpanded mode, or unified mode, the handle provides a sturdy, ergonomic grip; and an excellent walking cane.
It is anticipated that the invention, particularly in the partially expanded mode, could be used as a dry resting area to keep other gripped devices, such as umbrellas and golf clubs, off the ground. A dry resting area is particularly useful when one is laying down a putter while hitting a wedge just off the green.
REFERENCES:
patent: 731437 (1903-06-01), Czermak et al.
patent: 2346038 (1944-04-01), Mason
patent: 3392946 (1968-07-01), Stromberg
patent: 4121605 (1978-10-01), Schmerl
patent: 4997001 (1991-03-01), DiCarlo
patent: 5755245 (1998-05-01), Helvoort
patent: 5871025 (1999-02-01), Richter
patent: 364544 (1922-11-01), None
patent: 797836 (1936-05-01), None
patent: 493138 (1954-04-01), None
Brockington F. Rhett
Mai Lanna
Yip Winnie
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