Motor vehicles – Special driving device – Stepper
Reexamination Certificate
2006-11-21
2006-11-21
Winner, Tony (Department: 3611)
Motor vehicles
Special driving device
Stepper
C280S047270
Reexamination Certificate
active
07137464
ABSTRACT:
A hand truck for climbing stairs includes a frame having handles proximate a first end and at least two wheels proximate a second end. A stair climbing mechanism is engaged with the frame proximate the second end. The stair climbing mechanism has a motor and an output shaft having two ends drivingly connected thereto. At least two rotatable endless loop drive elements, generally parallel with respect to each other, are drivingly connected to the output shaft, one drive element at each end thereof. Each drive element includes at least one abutment member engaged with and extending outwardly therefrom. The motor drives the drive element to cause rotation of the abutment members, which interact with the stairs to lift the hand truck up the stairs.
REFERENCES:
patent: 2917120 (1959-12-01), Gates et al.
patent: 3061323 (1962-10-01), Tittes
patent: 3149688 (1964-09-01), Russell
patent: 3288234 (1966-11-01), Feliz
patent: 3330370 (1967-07-01), Morton
patent: 3362496 (1968-01-01), Landry
patent: 3494440 (1970-02-01), Hanson
patent: 3515401 (1970-06-01), Gross
patent: 3713501 (1973-01-01), Hurt
patent: 3734518 (1973-05-01), Sawmiller et al.
patent: 3907138 (1975-09-01), Rhodes
patent: 4109740 (1978-08-01), Andruchiw
patent: 4960179 (1990-10-01), Leach
patent: 5036929 (1991-08-01), Trougouboff
patent: 5195762 (1993-03-01), Pressly
patent: 5253881 (1993-10-01), Dunkle
patent: 5741169 (1998-04-01), Chen
patent: 6095531 (2000-08-01), Khachatoorian
patent: 6123162 (2000-09-01), Rodriguez et al.
patent: 6164398 (2000-12-01), Alber
Escalera Inc., Stair Climbing Handtrucks and Stair Climbing Forklifts—MODELS-, http://www.escalera.com/models/models.htm; 3 pages (Feb. 13, 2006).
Escalera Inc., Stair Climbing Handtrucks and Stair Climbing Forklifts—Stair Climbing-, http;//www.escalera.com/stairclimbing/stairclimbingmenu.htm; 1 page (Feb. 13, 2006).
Escalera Inc., home page, http://www.escalera.com/index.htm; 2 pages (Feb. 13, 2006).
Akin Gump Strauss Hauer & Feld & LLP
Wesco Industrial Products, Inc.
Winner Tony
LandOfFree
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