Land vehicles – Wheeled – Wheel steering by attendant
Patent
1986-12-18
1988-08-23
Mitchell, David M.
Land vehicles
Wheeled
Wheel steering by attendant
446451, A63H 3302
Patent
active
047656360
ABSTRACT:
A steerable pushcart (10) has a body (12). Wheels (14) are rotatably mounted on the body (12) and are positioned to support the body (12) on a surface (55). The wheels (14) have a fixed orientation with respect to the body (12). A handle (18) has a first end (40) with a steering wheel (38) for applying rotating force to the handle (18). The handle (18) has a second end (46) at an angle to the first end (40). The second end (46) of the handle (18) is rotatably attached to the body (12). The handle (18) has a lever arm (56) extending from the second end (46). The pushcart (10) has opposing springs (59, 60) connected between the lever arm (56) and the body (12). In operation, rotation of the handle (18) causes the body (12) to angle from its usual straight ahead position with respect to the handle (18), without a scissoring action with respect to the handle (18). In a four wheeled steerable pushcart (80), fron wheels (82) are pivotally responsive to rotation of the handle (96) when the front wheels (82) contact supporting surface (122), without any linkage between the handle (96) and the front wheels (82).
REFERENCES:
patent: 321434 (1885-07-01), Hanson
patent: 1097102 (1914-05-01), Kounovsky
patent: 1223766 (1917-04-01), Campbell
patent: 1310651 (1919-07-01), DeLong
patent: 1631546 (1927-06-01), Nistler
patent: 1681876 (1928-08-01), Peterson
patent: 1996546 (1935-04-01), Lindberg
patent: 4317307 (1982-03-01), Conry
patent: 4595380 (1986-06-01), Magers
patent: 4635956 (1987-01-01), Morrissette
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