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| Number | Title | Issue Date |
| 4158196 | Man-machine interface system The system provides a direct electrical interface between the electrical activity that may be self-induced in the human nervous system and the electrical activity in devices such as computers or calculators. Either one-way or two-way communication and/or ... | 06/12/1979 |
| 4157123 | Wheelchair electrical control circuit The normally provided manually operable switch lever on an electrically drive wheelchair incorporates pairs of switch arms so that additional circuitry can be provided for interconnection with the normally provided left and right wheel drive motors. This ... | 06/05/1979 |
| 4140192 | Wheelchairs An improved wheelchair having electrically powered drive motors in which a battery support tray is secured within an opening in a side frame of the wheelchair. Two batteries can be supported, one on each side frame, whereupon the conventional undercarriag... | 02/20/1979 |
| 4128137 | Peripatetic vehicles A peripatetic vehicle, the suspension of which includes a bogie carrying two main wheels, one to either side of the vehicle, and caster wheels. The stability of the suspension is completed by further casters, supported from the body of the vehicle. The us... | 12/05/1978 |
| 4125169 | Wheelchairs A power assisted wheelchair has a pair of larger ground wheels with handwheels mounted thereon and a pair of smaller castor wheels carrying motors drivably coupled therewith. The handwheels are rotatable relative to their ground wheels against a spring bi... | 11/14/1978 |
| 4119163 | Curb climbing wheel chair A self-propelled wheel-chair capable of climbing up or down a curb is disclosed. The wheel-chair is able to elevate an occupant higher than existing types of wheel-chairs practically to the height of a person standing. The wheel-chair has a seat assembly ... | 10/10/1978 |
| 4119164 | Stand-aid invalid wheelchair A wheelchair is designed to enable an invalid to stand, sit or choose at l any intermediate position to perform useful work, and to move about in any of said positions. The wheelchair helps to fulfill the psychological and physiological needs of handicap... | 10/10/1978 |
| 4114711 | Floor treating machines A floor treating machine, particularly for scrubbing or polishing a floor is provided with a recording and replay device for the power supply to the traction motors so that it may be programmed to repeat a pattern of movement automatically. In order to pr... | 09/19/1978 |
| 4110668 | Thyristor pulse controller for plural loads A pulse controller for controlling the current supply to a plurality of d.c. loads through a respective main thyristor for each load is provided with digital circuitry operable to maintain the mark-space ratios of voltage applied to the loads in a relatio... | 08/29/1978 |
| 4109186 | Self-propelled golf cart A radio controlled guidance and speed control system for a vehicle has spaced receivers for receiving magnetic energy signals from a movable energy source. The signals received vary in accordance with the position of the receivers with respect to the ener... | 08/22/1978 |
| 4106583 | Self-powered folding golf cart A power-assisted manually operated golf bag carrying cart is disclosed. The cart features a foldable tricycle support frame having parallel drive wheels, which can be maintained in parallel over a range of adjustment, and independently-powered direct driv... | 08/15/1978 |
| 4102292 | Amphibious vehicle An amphibious vehicle for travel in water or on land with transversely spaced power driven buoyant drums fore and aft of the vehicle and intermediate buoyant idler drums likewise transversely spaced around which are reeved spaced flexible endless belt tra... | 07/25/1978 |
| 4094361 | Permissible mine car adapter assembly A fire safety transmission apparatus comprising an explosion-proof container, an adapter plate secured to the container, a cylindrical sleeve mounted to the adapter plate defining a central bore, allowing communication with the interior of the container. ... | 06/13/1978 |
| 4078630 | Steering control system for remote controlled transportation units An improved steering control system for a remote controlled transport unit for moving said unit along a pair of guide lines fixed in space comprises two drive wheel means, one of the two drive wheel means having a first control angle associated th... | 03/14/1978 |
| 4078627 | Wheelchair controls A control unit for a motorized wheelchair for an invalid the control unit having a part engageable with the occupants chin and being movable in a first direction in order to cause movement of the wheelchair in a forwards direction and in a second and thir... | 03/14/1978 |
| 4077483 | Invalid vehicle An electrically powered vehicle for an invalid has a track drive with pivoted idlers accommodating travel over obstacles and through uneven terrain and an electrically adjustable seat with an open front to facilitate seating of an invalid therein. Remote ... | 03/07/1978 |
| 4067409 | Wheel chair arrangement A wheel chair with a retractable back rest, and a seat which may be uncovered to expose an opening that enables a patient in the wheel chair to use a toilet while remaining seated in the wheel chair. By actuating a switching arrangement, the patient may r... | 01/10/1978 |
| 4063607 | Motorized mechanical horse A vehicle in the shape of a saddled and bridled horse which teaches the fundamentals of horsemanship by responding to the reins in the manner in which a real horse would.... | 12/20/1977 |
| 4059786 | Wheelchair control circuit A wheel chair motor control circuit for a wheel chair having two independently controllable motor-driven wheels. The user has a "joystick" control operable from a datum position to move the wipers of two potentiometers both independently and simultaneousl... | 11/22/1977 |
| 4051416 | Incremental digital control circuit An incremental digital control system to effect incremental adjustments to an operating system. The control system is responsive to selective relationships between digital signals representative of operational characteristics for producing changes in cont... | 09/27/1977 |
| 4050533 | Powered wheel chair Disclosed is a powered wheel chair with individual motors driving each of two separate drive wheels. The motors are controlled by the amount of torque applied to the handrim of the driving wheel. If the operator pushes on the handrim of the drive wheel, a... | 09/27/1977 |
| 4044848 | Floor treating machines This invention relates to floor treatment machines, e.g. for scrubbing and polishing floors comprising a pair of driving wheels with independent speed control, a pair of independently movable manually operable control members mounted side-by-side on the m... | 08/30/1977 |
| 4037676 | Powered invalid-chairs A wheelchair for an invalid has two large ground wheels and two castor wheels, each ground wheel being driven by a small electric motor through a drive arrangement in which a driving pulley swings towards a driven surface on the wheel and drives itself in... | 07/26/1977 |
| 4008778 | Self powered jack carriage for moving disabled vehicles A self powered carriage which receives a conventional hydraulic floor jack to enable a disabled and immobile automobile to be moved and selectively manuvered. The carriage receives a conventional hydraulic floor jack in a manner whereby the load bearing w... | 02/22/1977 |
| 3970160 | Control means for electrically powered transportation means A steering control for an electrically powered vehicle having a pair of traction wheels on each side of the vehicle's frame, each of said wheels being driven by a synchronous type motor. The rotor field producing coils of each motor being separately contr... | 07/20/1976 |
| 3965402 | Headrest proportional control for motorized wheelchair A head controlled mechanism for the proportional control of a driven devi A mechanism is provided whereby a control signal is generated proportional to the movement of the head of an operator to control the speed and direction of the driven device.... | 06/22/1976 |
| 3955639 | Wheel chairs A wheel chair having electric driving means arranged to drive the rear wheels of the chair, each rear wheel and its associated electric driving means is supported by a wheel plate connected to the wheel chair frame by a resilient mounting embodying a susp... | 05/11/1976 |
| 3952822 | Electrically powered wheel-chair for indoor and outdoor use An electrically powered wheel-chair for indoor and outdoor use comprising a pair of rear main wheels, which are non-pivotably connected with the frame-work of the chair, at least one of said wheels being driven by an electric motor. A steering wheel being... | 04/27/1976 |
| 3945449 | Wheeled attachment for a chair A generally rectangularly shaped support frame provided with ground-engaging wheels upon which almost any type and size of conventional chair may be readily mounted so as to provide mobile means for transporting non-ambulatory persons; certain of the grou... | 03/23/1976 |
| 3942598 | Non-hostage vehicle A security vehicle adapted to prevent unauthorized entry thereinto comprising a base with an electrically conductive frame, an insulated platform on the frame and steerable propelling means for moving the base; a cage defining a security chamber over the ... | 03/09/1976 |
| 3934181 | Solid state light responsive control system The control system includes a plurality of light responsive devices and a mask structure having a part which is movable with respect to the devices to control the transmission of light thereto. The movable part of the mask structure may be a ball-like mem... | 01/20/1976 |
| 3930548 | Motorized scaffold attachment A small portable motorized attachment for propelling portable scaffolds from place to place is provided comprising a pair of electrically operated propulsion units adapted to detachably replace the front caster wheels of a scaffold and a control means for... | 01/06/1976 |
