Surface maintenance machine with removable storage

Patent metadata

Field	Value
Publication number	US-11154175-B2
Application number	US-201816164487-A
Country	US
Kind code	B2
Filing date	Oct 18, 2018
Priority date	Oct 18, 2017
Publication date	Oct 26, 2021
Grant date	Oct 26, 2021

Abstract

A coupling mechanism for removably coupling a storage cart to a surface maintenance machine includes a cart-side connector connectable to the storage cart and a machine-side connector connectable to the surface maintenance machine. The coupling mechanism includes a connecting rod engageable with the machine-side connector. The coupling mechanism includes a bracket assembly positioned between the cart-side connector and the machine-side connector. The bracket assembly can receive the connecting rod to engage therewith to facilitate a first relative movement between the connecting rod and a portion of the bracket assembly in a direction perpendicular to a floor surface on which the surface maintenance machine is traveling, and a pivoting of the bracket assembly about a pivot axis passing through the connecting rod.

First claim

What is claimed is:

1. A coupling mechanism for removably coupling a storage cart to a surface maintenance machine, the storage cart comprising a mobile body supported by a plurality of wheels, the coupling mechanism comprising:
a cart-side connector connectable to the storage cart;
a machine-side connector connectable to the surface maintenance machine;
a connecting rod facilitating an engagement between the cart-side connector and the machine-side connector; and
a bracket assembly positioned between the cart-side connector and the machine-side connector, the bracket assembly being connectable with the cart-side connector and/or the machine-side connector, wherein the bracket assembly comprises a first bracket and a second bracket, the first bracket and the second bracket each having an elongate slot, the elongate slot being configured to receive the connecting rod thereby engaging the cart-side connector with the machine-side connector to engage the storage cart to the surface maintenance machine,
the engagement between the connecting rod and the bracket assembly facilitating:
a first relative movement between the connecting rod and at least a portion of the bracket assembly in a direction perpendicular to an operating surface on which the surface maintenance machine is traveling, and
a pivoting of the bracket assembly about a pivot axis passing through the connecting rod,
the first relative movement and the pivoting maintaining each wheel of the plurality of wheels of the storage cart on the operating surface during travel of the surface maintenance machine thereon.

2. The coupling mechanism of claim 1 , wherein the elongate slot is oriented so as to be elongate along the direction perpendicular to the operating surface.

3. The coupling mechanism of claim 1 , wherein the first bracket is connectable to the cart-side connector.

4. The coupling mechanism of claim 1 , further comprising a handle attachable to the second bracket, the handle being configured to be raised or lowered to engage or disengage the connecting rod from the elongate slot, to connect or disconnect, respectively, the storage cart from the surface maintenance machine.

5. The coupling mechanism of claim 4 , wherein the handle is configured to be raised or lowered in the direction perpendicular to the operating surface, wherein, raising or lowering the handle permits a second relative movement between the first bracket and the second bracket in the direction perpendicular to the operating surface.

6. The coupling mechanism of claim 5 , wherein the first bracket and the second bracket are connected to each other by one or more spring-loaded pins, each spring-loaded pin being movable to an extended position when the handle is raised, each spring-loaded pin being movable to a retracted position when the handle is lowered, wherein each spring-loaded pin is spring-biased to return to the retracted position from the extended position.

7. The coupling mechanism of claim 6 , wherein movement of each spring-loaded pin from the extended position to the retracted position is associated with movement of the second bracket toward the first bracket.

8. The coupling mechanism of claim 1 wherein the second bracket comprises a leading edge and a trailing edge opposite to the leading edge, the leading edge being more proximal to the connecting rod than the trailing edge when the connecting rod is being brought toward the elongate slot to be received therewithin, the leading edge being more proximal to the operating surface than the trailing edge, the leading edge acting as an end stop for the connecting rod received in the elongate slot to prevent inadvertent removal thereof.

9. The coupling mechanism of claim 1 , further comprising an aligning bracket connectable to the machine-side connector, the aligning bracket being configured to align with the bracket assembly so as to permit engagement of the connecting rod with the bracket assembly.

10. The coupling mechanism of claim 9 , wherein the aligning bracket comprises one or more elongate slots, each elongate slot of the aligning bracket being oriented so as to be elongate along the direction perpendicular to the operating surface.

11. The coupling mechanism of claim 10 , wherein each elongate slot of the aligning bracket is engageable with corresponding fasteners to connect the aligning bracket to the machine-side connector, each elongate slot of the aligning bracket permitting a third relative movement between the aligning bracket and the machine-side connector in the direction perpendicular to the operating surface.

12. The coupling mechanism of claim 9 , wherein the aligning bracket comprises lateral flanges with openings for receiving the connecting rod, the lateral flanges being separated by a distance greater than a width of the bracket assembly such that when the connecting rod is received in the elongate slot of the first and second brackets, the lateral flanges are adjacent to and positioned to the exterior of the first and second brackets.

13. The coupling mechanism of claim 1 , wherein the bracket assembly comprises a mount and a receiver, the mount having a first lateral mount flange, a second lateral mount flange opposite the first lateral mount flange, and a mount aperture extending through the first and second lateral mount flanges, the receiver being configured to receive the mount and having a first lateral receiver flange, a second lateral receiver flange opposite first lateral receiver flange, and a receiver aperture extending through the first and second lateral receiver flanges, the mount aperture and the receiver aperture being configured to receive the connecting rod thereby engaging the cart-side connector with the machine-side connector to engage the storage cart to the surface maintenance machine.

14. The coupling mechanism of claim 13 , wherein either the mount aperture or the receiver aperture is elongate along the direction perpendicular to the operating surface.

15. The coupling mechanism of claim 14 , wherein the other of the mount aperture or the receiver aperture that is not elongate is circular.

16. The coupling mechanism of claim 15 , wherein the receiver aperture is elongate along the direction perpendicular to the operating surface and the mount aperture is circular.

17. The coupling mechanism of claim 13 , wherein the connecting rod further comprises a first and second end and wherein either the first or second end comprises a locking mechanism configured to secure the connecting rod in the direction of the pivot axis passing through the connecting rod.

18. The coupling mechanism of claim 17 , wherein the locking mechanism is a fastener.

19. The coupling mechanism of claim 13 , wherein the first lateral mount flange and the second lateral mount flange are separated by a distance greater than a width of the mount such that when the connecting rod is received in the receiver aperture, the first lateral mount flange and the second lateral mount flange are adjacent to and positioned to the exterior of the first and second lateral receiver flanges.

20. A surface maintenance machine, comprising:
a mobile body supported by a plurality of wheels;
one or more surface maintenance tools configured to perform one or more surface maintenance operations on an operating surface; and
a coupling mechanism for removably coupling a storage cart to the surface maintenance machine, the coupling mechanism comprising:
a cart-side connector connectable to the storage cart,
a machine-side connector conne

Assignees

• Tennant Co

Inventors

• Carlson Brett Jason
• Baldwin Matthew Ryan
• Jensen Laurence A
• Ickes John C
• Dickrell Martin L
• Dimovski Michael M
• Sehmke Stefan
• Stock Jacob L

Classifications

• A47L11/40 Primary

  Parts or details of machines not {provided for in} groups A47L11/02 - A47L11/38, {or not restricted to one of these groups}, e.g. handles, arrangements of switches, skirts, buffers, levers · CPC title

• E01H1/02

  Brushing apparatus, {e.g. with auxiliary instruments for mechanically loosening dirt}({E01H1/003, E01H1/005, E01H1/006 and} E01H1/08 - E01H1/14 take precedence; {loosening by means of gas jets or streams E01H1/0818, E01H1/0872; with brushes functioning under vacuum or combined with independent suction nozzles E01H1/0827; loosening by means of liquid streams E01H1/101; mechanical loosening instruments other than brushes E01H1/105; for railway tracks E01H8/00}; brushes in general A46B; {for floors or similar surfaces A47L11/22, A47L11/24}) · CPC title

• A47L13/51

  Storing of cleaning tools, e.g. containers therefor · CPC title

• B60D1/02

  Bolt or shackle-type couplings · CPC title

• B60D1/36

  for facilitating connection, e.g. hitch catchers · CPC title