Stroller wheel suspension

• US 7,770,905 B2
• Filed: 04/03/2007
• Issued: 08/10/2010
• Est. Priority Date: 04/03/2006
• Status: Expired due to Fees

• Current Assignee: Graco Children's Products, Inc. (Newell Brands Inc.)
• Original Assignee: Graco Children's Products, Inc. (Newell Brands Inc.)
• Inventors: Dotsey, Michael A., Nolan, Patrick
• Primary Examiner(s): Morano; S. Joseph
• Assistant Examiner(s): FOLLMAN, BRODIE J
• Application Number:
  US11/696,167
• Publication Number:
  US 20070257457A1
• Time in Patent Office: 1,225 Days
• Field of Search: 280/5.512, 280/47.22, 280/47.38, 280/47.41, 280/65, 280/79, 280/124.1, 280/124.125, 280/647, 280/650, 280/657, 280/658, 301/2, 301/133, 267/2, 267/158, 267/160, 188/1.12, 16/35.D, 16/44
• US Class Current: 280/86.1
• CPC Class Codes: B60B 33/0002 assembling to the object, e.g. furniture
• CPC Class Codes: B60B 33/0039 Single wheels
• CPC Class Codes: B60B 33/0042 Double or twin wheels
• CPC Class Codes: B62B 2202/023 Beverage holders, e.g. for a cup, tin or bottle
• CPC Class Codes: B62B 2205/006 dismountable
• CPC Class Codes: B62B 2301/20 Resilient wheel suspension using springs
• CPC Class Codes: B62B 5/065 by means of telescopic elements
• CPC Class Codes: B62B 7/044 three wheeled
• CPC Class Codes: B62B 7/08 in the direction of, or at right angles to, the wheel axis
• CPC Class Codes: B62B 9/102 characterized by details of the seat
• CPC Class Codes: B62B 9/18 Resilient suspensions of bodies
• CPC Class Codes: B62B 9/20 Handle bars; Handles
• CPC Class Codes: B62B 9/24 Safety guards for children, e.g. harness cat nets B62B9/14; devices for use in guiding or supporting children, e.g. safety harness A47D13/08
• CPC Class Codes: B62B 9/26 Securing devices for bags or toys ; Arrangements of racks, bins, trays or other devices for transporting articles

Abstract

A stroller wheel suspension mechanism has a generally rigid carrier with a top mounting section connectable to a stroller frame and a downward facing surface. The carrier also has a depending spring section that extends downward from the top mounting section adjacent an end of the downward facing surface and that has a generally vertically oriented surface. The carrier also has a bottom spring section that extends from the depending spring section and that has an upward facing surface. The depending and bottom spring sections are resiliently deflectable relative to the top mounting section. A wheel mount is provided on the bottom spring section. A solid body damper of a resilient, flexible material is positioned within a damper region formed adjacent the downward facing, generally vertically oriented, and upward facing surfaces of the carrier.

Claims

1. A stroller wheel suspension mechanism comprising:

a generally stiff but resilient carrier having,

a) a top mounting section connectable to a stroller frame, and a downward facing surface on the top mounting section,

b) a depending spring section extending downward from the top mounting section adjacent an end of the downward facing surface, and a generally vertically oriented surface on the depending spring section, and

c) a bottom spring section extending from the depending spring section, and an upward facing surface on the bottom spring section spaced from the downward facing surface, the depending spring section and bottom spring section being resiliently deflectable relative to the top mounting section, and the top mounting section, depending spring section, and bottom spring section being integrally formed as a unitary structure from the same resilient material; and

d) a wheel mount provided on the bottom spring section and spaced from the depending spring section;

a damper region bounded within the carrier by the downward facing, vertically oriented, and upward facing surfaces; and

a solid body damper of a resilient, flexible material positioned within the damper region and connected to the downward facing, vertically oriented, and upward facing surfaces of the carrier.

2. A stroller wheel suspension mechanism according to claim 1, wherein the carrier is formed from a material selected from the group consisting of glass reinforced NYLON, carbon fiber, spring steel, or a plastic composite.

3. A stroller wheel suspension mechanism according to claim 1, wherein the solid body damper is formed from thermoplastic elastomer or micro-cellular urethane.

4. A stroller wheel suspension mechanism according to claim 1, wherein the wheel mount includes an axle bore extending laterally across the bottom spring section.

5. A stroller wheel suspension mechanism according to claim 4, wherein the axle bore is a through bore and wherein an axle protrudes beyond either side of the wheel mount on the bottom spring section.

6. A stroller wheel suspension mechanism according to claim 1, wherein the wheel mount includes an integrally formed axle protruding from at least one side of the bottom spring section.

7. A stroller wheel suspension mechanism according to claim 1, wherein the wheel mount includes a pair of integrally formed axles protruding from opposite sides of the bottom spring section.

8. A stroller wheel suspension mechanism according to claim 1, wherein the carrier and the solid body damper are molded in a dual molding process and the solid body damper is molecularly bonded to the downward facing, vertically oriented, and upward facing surfaces of the carrier.

9. A stroller wheel suspension mechanism according to claim 1, wherein the solid body damper has exposed surfaces that are not directly connected to the carrier and that have a uniform consistent surface texture.

10. A stroller wheel suspension mechanism according to claim 1, wherein the solid body damper has exposed surfaces that are not directly connected to the carrier and that have depressions formed in the exposed surfaces creating a non-uniform surface texture.

16. A stroller wheel suspension mechanism according to claim 5, further comprising a pair of wheels, one mounted to the axle on either side of the bottom spring section of the carrier.

17. A stroller wheel suspension mechanism according to claim 16, wherein the solid body damper is positioned between the pair of wheels.

18. A stroller wheel suspension mechanism according to claim 1, wherein the top mounting section, depending spring section, and bottom spring section generally define a C-shaped configuration.

11. A stroller wheel assembly comprising:

a generally C-shaped spring with a top section connected to a stroller frame and a downward facing surface on the top section, a depending spring section extending downward from the top section adjacent one edge of the downward facing surface and having a generally vertically oriented surface, a bottom spring section extending from the depending spring section and having an upward facing surface spaced from the downward facing surface, and a damper region defined within the C-shape of the top section and the depending and bottom spring sections, the depending spring section and bottom spring section being resiliently deflectable relative to the top section;

an axle spaced from the depending spring section and carried on a free end of the bottom spring section;

at least one wheel mounted to the axle; and

a solid body damper of a resilient material positioned within the damper region and connected to the downward facing, vertically oriented, and upward facing surfaces of the spring,

wherein the top mounting section, depending spring section, and bottom spring section are integrally formed as a unitary structure from the same resilient material.

12. A stroller wheel assembly according to claim 11, wherein the axle is integrally molded as a part of the bottom spring section.

13. A stroller wheel assembly according to claim 11, wherein the axle is received in a bore formed laterally across the bottom spring section.

14. A stroller wheel assembly according to claim 11, wherein the bore is a through bore and the axle includes an exposed end projecting from opposed sides of the bottom spring section, and wherein a pair of wheels are mounted to the axle, one on each exposed end.

15. A stroller wheel assembly according to claim 11, wherein the stroller wheel assembly has a pair of wheels and the spring and solid body damper are positioned between the wheels.

19. A stroller wheel assembly comprising:

a generally stiff but resilient carrier with a) a top mounting section connectable to a stroller frame and having a downward facing surface, b) a depending spring section extending downward from an end of the top mounting section and having a generally vertically oriented surface, c) a bottom spring section extending from an end of the depending spring section and having a free end and an upward facing surface spaced from the downward facing surface, and d) a damper region bounded within the carrier by the downward facing, vertically oriented, and upward facing surfaces;

a solid body damper of a resilient, flexible material positioned within the damper region and connected to the downward facing, vertically oriented, and upward facing surfaces of the carrier; and

at least one wheel mounted to the carrier near the free end of the bottom spring section,

wherein the depending spring section and bottom spring section are resiliently deflectable relative to the top mounting section and the top mounting section, depending spring section, and bottom spring section are integrally formed as a unitary structure from the same resilient material.

20. A stroller wheel assembly according to claim 19, wherein the top mounting section, depending spring section, and bottom spring section generally form a C-shaped configuration.