Patents by Inventor Charles F. Quinn

Charles F. Quinn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4807317
    Abstract: The specification discloses a modular and reusable wheelchair ramp capable of ready assembly and disassembly while providing a strong and safe construction. The ramp includes a plurality of leg assemblies fabricated of PVC plumbing components and a plurality of ramp sections each extending between and mounted on a pair of adjacent leg assemblies. Each leg assembly includes a pair of legs and an interconnecting crossbar slidably received thereon for ready height adjustability. The ramp sections are hooked over the crossbars. In a preferred embodiment, handrails also fabricated of PVC plumbing components are also slidably mounted on the legs.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: February 28, 1989
    Assignee: Easter Seal Society of Michigan, Inc.
    Inventors: Charles F. Quinn, Thomas E. Young