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A walker having a pair of front vertical posts and rear vertical posts carrying vertically adjustable casters at the lower ends. A pair of front cross bars interconnect with the pair of front posts. A pair of first horizontal side bars interconnecting the front and rear vertical posts in spaced posi

A walker having a pair of front vertical posts and rear vertical posts carrying vertically adjustable casters at the lower ends. A pair of front cross bars interconnect with the pair of front posts. A pair of first horizontal side bars interconnecting the front and rear vertical posts in spaced positions, and a pair of second horizontal side bars interconnecting second of the front and rear vertical posts, forming an enclosed area. A gate is pivotally connected to a rear post having a pair of horizontally spaced vertical rods interconnected at upper and lower extremities with a pair of vertically spaced horizontal rods forming a generally rectangularly configured gate. The gate has a pivotally connected seat assembly. The seat is operative between a horizontal position allowing the patient to sit and a vertical stored position.

대표청구항 ▼

A walker having a pair of front vertical posts and rear vertical posts carrying vertically adjustable casters at the lower ends. A pair of front cross bars interconnect with the pair of front posts. A pair of first horizontal side bars interconnecting the front and rear vertical posts in spaced posi

A walker having a pair of front vertical posts and rear vertical posts carrying vertically adjustable casters at the lower ends. A pair of front cross bars interconnect with the pair of front posts. A pair of first horizontal side bars interconnecting the front and rear vertical posts in spaced positions, and a pair of second horizontal side bars interconnecting second of the front and rear vertical posts, forming an enclosed area. A gate is pivotally connected to a rear post having a pair of horizontally spaced vertical rods interconnected at upper and lower extremities with a pair of vertically spaced horizontal rods forming a generally rectangularly configured gate. The gate has a pivotally connected seat assembly. The seat is operative between a horizontal position allowing the patient to sit and a vertical stored position. and extending upwardly therefrom; a pair of intermediate frame members with each intermediate frame member slidably mounted on each respective main frame member and joined together by a connecting cross member so that the intermediate members can slide in unison on the main frame members between an elevated position and a lowermost position; a pair of upper sprockets with each upper sprocket mounted at the upper end of each respective main frame member; a pair of lower sprockets with each lower sprocket mounted to the respective wheel axles adjacent the lower end of each main frame member; two pairs of intermediate idler sprockets with one pair mounted to each intermediate frame member and at least one intermediate idler sprocket from each pair having a locking disposition that restricts the rotation of that intermediate idler sprocket; a pair of continuous chains with each continuous chain entrained on one set of upper and lower sprockets and one pair of intermediate idler sprockets and the chains being driven by the rotation of the wheels; a brake pedal for engaging and locking at least one intermediate idler sprocket from each pair of intermediate idler sprockets for restricting the free rotation of those intermediate idler sprockets; a pair of locking and releasing pins for locking each intermediate frame member to each main frame member when each intermediate frame member is moved to the elevated position and for releasing each intermediate frame member so that the intermediate frame members can descend on the main frame members to the lowermost position; and a pin releasing pedal interconnected to the locking and releasing pins so that depression of the pin releasing pedal causes the pins to retract from the intermediate frame members and the main frame members thus allowing the intermediate frame members to slide on the main frame members for disposition to the lowermost position. 2. The two wheeled, height adjustable cart recited in claim 1 further comprising a position setting mechanism for setting the lowermost position to which the intermediate frame members can descend relative to the main frame members. 3. The two wheeled, height adjustable cart recited in claim 2 wherein the position setting mechanism includes a pair of flexible straps with each strap having an upper strap portion for securement to the upper end of each main frame member and a lower strap portion for securement to the lower end of each main frame member. 4. The two wheeled, height adjustable cart recited in claim 3 further comprising a pair of worm gear drives with each worm gear drive being interconnected to each flexible strap and the worm gear drives being manipulable by a hand crank in order to vary and then set the lowermost position to which the intermediate frame members can descend on the main frame members. 5. The two wheeled, height adjustable cart recited in claim 4 further comprising a pair of helper springs with each helper spring having an upper spring end for attachment to each main frame member and a lower spring end for securement to each intermediate frame member for dampening the descent of the intermediate frame members on the main frame members and for assisting in lifting the intermediate frame members on the main frame members when the cart is being raised to the elevated position. 6. The two wheeled, height adjustable cart recited in claim 5 further comprising a raised drawbar for attaching the cart to the draft animal whereupon the drawbar can be attached to the draft animal above the legs of the draft animal in order to avoid injury to the legs of the draft animal. 7. A two wheeled, height adjustable work platform for pulling farm implements that perform field work, comprising: a pair of spaced-apart main frame members with each main frame member connected to, and extending upwardly from, the axles of each respective wheel; a pair of upper sprockets with each upper sprocket mounted at the upper end of each main frame member and a pair of lower sprockets with each lower sprocket rotatably mounted coaxially to each respective wheel axle adjacent the lower end of each main frame member; the work platform for disposition on the main frame members including: a pair of intermediate frame members with each intermediate frame member mounted on each respective main frame member for slidable movement thereon between an elevated position and lowermost position, the intermediate slidable members interconnected by a cross bar for unitary slidable movement on the main frame members; two pairs of intermediate idler sprockets with each pair of intermediate idler sprockets attached to each intermediate frame member; a pair of continuous chains with each continuous chain entrained on one set of upper and lower sprockets and one pair of intermediate idler sprockets and the chains being rotatably driven by the rotation of the wheels; a brake pedal mounted to the cross bar and linked to both sets of intermediate idler sprockets so that depression of the brake pedal causes at least one intermediate idler sprocket from each pair to move into a locking position thus limiting the free rotation of the chains but not the wheels; a pair of locking and releasing pins for locking the intermediate frame members to the main frame members for maintaining the work platform in the elevated position and for retraction therefrom so that the work platform can descend on the main frame members to the lowermost position; and a pin releasing pedal mounted to the crossbar and linked to the locking and releasing pins so that depression of the pin releasing pedal actuates the retraction of the pins from the intermediate frame members and the main frame members thereby allowing the intermediate frame members to slide on the main frame members for allowing the work platform to move from the elevated position to the lowermost position. 8. The two wheeled, height adjustable work platform recited in claim 7 further comprising a pair of helper springs with each helper spring having an upper spring end secured to the respective main frame member and a lower spring end secured to the respective intermediate frame member for dampening the movement of the work platform from the elevated position to the lowermost position and for assisting in raising the work platform from the lowermost position to the elevated position. 9. The two wheeled, height adjustable work platform recited in claim 8 further comprising a pair of position setting straps with each strap capable of selective adjustment in order to vary the lowermost position to which the work platform can descend on the main frame members. 10. The two wheeled, height adjustable work platform recited in claim 9 wherein each position setting strap is flexible and has an upper strap portion for attachment to the respective main frame member and a lower strap portion for attachment to the respective intermediate frame member whereupon the flexibility of the straps facilitates the variable setting of the lowermost position to which the work platform can descend. 11. The two wheeled, height adjustable work platform recited in claim 10 wherein each main frame member includes a main frame aperture for receiving the respective locking and releasing pin. 12. The two wheeled, height adjustable work platform recited in claim 11 wherein each intermediate frame member includes a receiving hole for insertion therein of the respective locking and releasing pin. 13. The two wheeled, height adjustable work platform recited in claim 12 wherein the main frame apertures and the receiving holes are brought into alignment by the slidable movement of the intermediate frame members on the main frame members so that the pins can be inserted therethrough in order to lock the intermediate frame members to the main frame members for maintaining the work platform in the elevated position. 14. The two wheeled, height adjustable work platform recit