1. Field of the Invention
This invention generally relates to seats, desks, tables, workstations and hand trucks. Specifically, this device is a combination folding portable seat/desk/hand truck.
Traditionally, technicians, engineers, surveyors, maintenance, and emergency personnel and the like employed in industrial, commercial or institutional settings are required to perform field work outside a typical office environment. Field work may be indoors or outdoors, upon a factory floor or mezzanine, aboard a seagoing vessel, aircraft or land vehicle. Field work generally involves equipment and or facilities construction, start-up, commissioning, field trials, maintenance, calibration, certification etc. Such field work can range from a few minutes duration to days or even years dependant on the project work scope. Many field work sites do not have permanent workstations, tables, desks, chairs, and or hand trucks hereafter known as workstations. Generally it is not practical to locate permanent workstations that will be used infrequently as the workstations occupy expensive real estate and typically collect useless items rendering the workstations unavailable when needed. Oftentimes makeshift workstations are assembled from inverted buckets, wire spools, boxes, crates, pallets, steps, machinery ledges, etc. Rarely are these makeshift workstations the correct seating or working height and as such are generally uncomfortable. Fatigue commonly occurs when using such makeshift workstations resulting in reduced productivity and workmanship. Additionally, makeshift workstations are often unstable and or incapable of adequately supporting personnel or equipment. Personnel injury and or equipment damage can and does occur due to workstation tipping and or structural failure.
Frequently, heavy toolboxes, briefcases, portable computers, instruments, etc. hereafter known as equipment, are hand carried to the field work site. Injuries such as muscle strains, back pain, etc. are commonly related to lifting or hand carrying equipment. Hand trucks provide an injury reducing means to transport equipment to work sites, but do not provide a seat or work surface.
Overall, makeshift workstations are generally inadequate in the following respects:
2. Prior Art
The proposed device differs from U.S. Pat. No. 6,601,865 Visually Appealing Versatile Rollable and Folding Chair as the prior art provides portable seating and a reading surface, but the four wheel design is inherently unstable on uneven flooring. Additionally, the seating height and book surface height are generally not readily adjustable to accommodate the majority of the world's adult population. The proposed device differs from U.S. Pat. No. 6,439,134 Work Surface for Luggage and Luggage Carriers as the prior art provides a portable a work surface and luggage carrier but no seating means.
The proposed device differs from U.S. Pat. No. 6,604,720 Portable PC Workstation as the prior art provides a portable work surface but no seating means.
The proposed device differs from U.S. Pat. No. 6,543,796 Combined Desk and Luggage Carrier as the prior art provides a portable work surface and luggage carrier but no seating means.
The proposed device differs from U.S. Pat. No. 5,413,400 Portable Desk Assembly as the prior art provides portable seating and a work surface but without the means transport itself via wheels or transport additional equipment.
The proposed device differs from U.S. Pat. No. 6,604,783 B2 Portable Collapsible Workstation as the prior art provides portable seating and a work surface but without the means transport itself via wheels or transport additional equipment.
The proposed device differs from U.S. Pat. No. 5,961,134 Apparatus for Housing and Transporting, and Furnishing an Adjustable User-platform for a Portable Computer as the prior art provides portable work surface and transportation means, but no seating means.
The proposed device differs from U.S. Pat. No. 6,098,936 Portable Ergonomic Work Station as the prior art provides portable work surface, but no seating means.
The proposed device provides a portable workstation solving the aforementioned limitations by providing the following features:
This invention provides a portable workstation apparatus and method designed to satisfy the aforementioned needs. The invention is a wheeled, portable, collapsible workstation with integral seating, work surface, load securing and transportation capacity. This unique invention utilizes a stable tripod frame structure, an ergonomically adjustable and designed seating assembly, and an ergonomically adjustable and designed work surface assembly in a hand portable device. The invention is designed to accommodate approximately the workstation dimensional requirements of 95% of the world's adult population (smallest 2.5% to largest 97.5%). With commonly used construction materials, and fabrication techniques similar to bicycle manufacturing; the invention provides a simple and economic portable workstation solution for engineers, technicians, maintenance personnel, and the like employed in such professions. The workstation work surface provides a storage location and attachment means for equipment, luggage, toolboxes, instrumentation, computing devices, and the like. The user attaches equipment to the work surface. Using the integral handle and wheels, the user pulls/pushes the workstation and equipment to a work site. The user removes the equipment from the work surface, and unfolds the workstation, adjusting the seat and work surface as desired. The user replaces the equipment on the work surface. The user now has an ergonomically adjusted workstation allowing for greater productivity and less fatigue. Additionally, equipment damage due to falls from unstable or makeshift work surfaces is minimized. Variations in construction materials provide for increased resistance to damage from the elements, chemical or physical abuse, food service or use in hazardous/classified locations. Various equipment devices such as photographic equipment may be substituted for the work surface. Additionally, the work surface converts to an artist's easel. Two or more workstations may be combined forming a larger table work surface.
A seat assembly mounting device 30 heater known as Mount 30 is generally attached to Frame 20. A seat vertical position control device 34 hereafter known as Lift 34 is attached to Mount 30. A scissors type lifting mechanism is preferred for lift 34 as it is compact and provides a raised to lowered height ratio greater than 2:1. Bellows type pinch point guarding and or aesthetic covering(s) although not shown, may be employed to cover Lift 34. Lift 34 is actuated via handle 36. Handle 36 is articulated such that it will pivot and release should it catch upon an obstacle while the apparatus is transported. A bearing assembly 38 is provided to allow the user to swivel the seat 32. The bearing assembly 38 can be constructed of sliding and or rolling bearing materials, with the choice of material being the suitable for the workstation environment. A stop mechanism 39 generally a releasable spring type plunger device can be used to prevent seat 32 rotation about the vertical axis. The seat 32 dimensions and features are configured to support 95% of the world's adult population. The seat 32 can be provided with a removable back support member 40. The back support member 40 may have an articulation 44 to facilitate storage and transportation. A seat back 42 is provided upon the back support member 40. An approximate planar work surface 60 is supported via a work surface position control device 50 hereafter known as Position Control 50. Position Control 50 generally consists of one or more extensible members with extension locking points 52 and if necessary 54. Position Control 50 also cooperates with Frame 20 via a lockable articulation 26. Lockable articulation 26 can have lockable means within its own assembly in the form of a ratcheting mechanism or a clamping mechanism. Position Control 50 also cooperates with work surface 60 via a lockable articulation 56. Lockable articulation 56 can have lockable means within its own assembly in the form of a ratcheting mechanism or a clamping mechanism. Work surface 60 is provided having one or more attachment areas for lockable articulation 56 cooperation with position control 50. Position control 50 extensible features cooperating with lockable articulation 26 and lockable articulation 56 provides means of horizontal and vertical positioning of work surface 60 with respect to seat 32. Said cooperation between seat 32 to work surface 60 providing dimensional accommodations for 50% of world adult population. The positioning of seat 32 and work surface 60 are consistent with the needs of the average or 50th percentile user. Alternate point of lockable articulation 58 is provided for alternative configurations described in