Brakes – Vehicle – Top shoes
Reexamination Certificate
2003-06-27
2004-08-31
Schwartz, Chris (Department: 3683)
Brakes
Vehicle
Top shoes
C188S019000
Reexamination Certificate
active
06782976
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The subject invention relates to a brake and wheel assembly for a manually operated cart, wagon, or the like, used to move heavy articles across a floor or other surface.
2. Description of the Related Art
Various devices exist in the art for applying a brake against a wheel to impede or arrest rotational movement of the wheel relative to the axle upon which the wheel is mounted. Such devices typically include a brake band having one end mounted on a wheel support adjacent the wheel. The other end of the brake band is moved by the actuator between a single brake-applying position in which the brake band engages the wheel to frictionally resist movement of the wheel, and an unlocked position in which the actuator releases the brake band so that it moves away from the wheel, which in turn allows the wheel to rotate freely about the axle.
Although prior wheel and brake assemblies have been successfully used on manually-operated carts, no brake and wheel assembly exists that is easy to operate and is specifically intended for use on low-profile carts upon which heavy machinery is permanently carried. Such carts are used to move heavy, cumbersome power tools or machines that would otherwise remain in a stationary position on a floor in a shop during use. In those shops in which floor space is limited, each machine is placed on one of the carts and remains there regardless of whether the machine is in storage or in use. The low profile of the cart permits the machine to be easily accessed for use; however, because the machine remains on the cart during use, sudden movement of the cart may compromise efficient operation of the machine.
Low profile carts need effective braking systems to keep the carts from inadvertently moving. While certain prior brake assemblies successfully prevent a wheel from rotating, such assemblies are ill-suited for use on low-profile or other carts because the assembly must be manipulated by hand or foot to force a lever or turn a threaded shaft to ensure that a brake-applying surface engages one of the cart's wheels to prevent the cart from moving. An example of one such brake assembly is disclosed in U.S. Pat. No. 4,035,864 (“Schröder”). The Schröeder brake assembly features a foot-operated control lever with an expanding toggle pivotally mounted in a socket of a spring-loaded locking rocker. Although the Schröeder brake assembly can be effectively used to decelerate a moving wheel, the locking rocker used in the device has only one surface capable of engaging the tire of a running wheel, and that surface is placed in only one brake-applying position to decelerate movement of the wheel. Furthermore, because the locking rocker is completely enclosed within the cavity of a caster fork, no reliable visual indicia are in place to effectively indicate whether the control lever has successfully moved the locking rocker between the single brake-applying position and a released position away from the wheel.
Prior brake and wheel assemblies are incapable of being placed in more than one brake-applying position, and lack adequate means for determining with any degree of specificity whether the brake utilized in the assembly is actually in that brake-applying position. Thus, there remains an opportunity for a brake and wheel assembly featuring multiple brake surfaces capable of being placed in a plurality of brake-applying positions.
BRIEF SUMMARY OF THE INVENTION AND ADVANTAGES
The invention provides a brake and a wheel assembly, wherein a wheel is rotatably supported on an axle and a brake band is supported tangentially across the wheel. An actuator is movably supported for movement between first and second brake-applying positions to engage the brake band with the wheel in either of the first or second brake-applying positions.
Accordingly, the subject invention overcomes the limitations of the related art by providing a brake and wheel assembly featuring a brake band that is capable of being moved between first and second braking positions. This is achieved by suspending the brake band tangentially across the surface of a wheel and using a pivotally mounted actuator to apply a tangential force on the brake band so that first and second braking surfaces on the brake band frictionally engage the actuator in the respective first and second braking positions.
REFERENCES:
patent: 141236 (1873-07-01), Robertson
patent: 918636 (1909-04-01), Young
patent: 1428932 (1922-09-01), Bayer
patent: 1555839 (1925-10-01), Fries et al.
patent: 1863349 (1932-06-01), Noeling et al.
patent: 2138433 (1938-11-01), Sunden
patent: 2484094 (1949-11-01), Jackson
patent: 2494696 (1950-01-01), Forbes
patent: 2512941 (1950-06-01), Johnson
patent: 2572548 (1951-10-01), Weisz et al.
patent: 2707794 (1955-05-01), Kramcsak, Jr.
patent: 2709828 (1955-06-01), Noelting et al.
patent: 2905275 (1959-09-01), Kostolecki et al.
patent: 2915775 (1959-12-01), Skupas
patent: 2972163 (1961-02-01), Ross et al.
patent: 3066764 (1962-12-01), Clinton et al.
patent: 3283851 (1966-11-01), Smith
patent: 3298467 (1967-01-01), Darnell
patent: 3467981 (1969-09-01), Peter
patent: 3493085 (1970-02-01), Libhart
patent: 3534978 (1970-10-01), Stanfield
patent: 3772733 (1973-11-01), Stosberg et al.
patent: 3881216 (1975-05-01), Fontana
patent: 3890669 (1975-06-01), Reinhards
patent: 3942608 (1976-03-01), Frank et al.
patent: 3985208 (1976-10-01), Libhart
patent: 4114232 (1978-09-01), Umeda
patent: 4128144 (1978-12-01), Vassar
patent: 4212092 (1980-07-01), Ferrari
patent: 4248445 (1981-02-01), Vassar
patent: 4276962 (1981-07-01), Aulik
patent: 4336630 (1982-06-01), Page
patent: 4349937 (1982-09-01), Fontana
patent: 4360951 (1982-11-01), Bucher
patent: 4449268 (1984-05-01), Schnuell
patent: 4453287 (1984-06-01), Kassai
patent: 4494272 (1985-01-01), Morita
patent: 4821369 (1989-04-01), Daniels
patent: 4835815 (1989-06-01), Mellwig et al.
patent: 4870715 (1989-10-01), Schnuell
patent: 5002163 (1991-03-01), Kidd
patent: 5012550 (1991-05-01), Schlosser
patent: 5236066 (1993-08-01), O'Neal et al.
patent: 5328000 (1994-07-01), Rutter et al.
patent: 5390942 (1995-02-01), Schuster et al.
patent: 5402864 (1995-04-01), Block et al.
patent: 5497856 (1996-03-01), Block et al.
patent: 5511805 (1996-04-01), McGrath
patent: 5566788 (1996-10-01), Smith et al.
patent: 5628386 (1997-05-01), England
patent: 5802668 (1998-09-01), Gosselin
patent: 5829096 (1998-11-01), Perry
patent: 6223864 (2001-05-01), Phelps et al.
patent: 6286184 (2001-09-01), Dean et al.
patent: 6286630 (2001-09-01), Obergfell
patent: 6286632 (2001-09-01), Chai
patent: 6463508 (2002-10-01), Wolf et al.
patent: 6532624 (2003-03-01), Yang
patent: 2002/0093155 (2002-07-01), Scott
patent: 33 46 722 (1985-06-01), None
patent: 2 504 066 (1982-10-01), None
Howard & Howard
HTC Products, Inc.
Schwartz Chris
LandOfFree
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