"Gurney" etymology

[Douglas G. Wilson]

Is the origin of "gurney" = "wheeled cart or bed" (medical and other
jargon, I think) known?

I am surprised to find no very plausible origin in quick Web-search. My
dictionaries have nothing very likely; AHD mentions a horse-drawn cab from
1883, but I think the current usage dates from about 50 years later.

A notion which occurs to me involves the Gurney brand of ball bearings. Has
anybody looked into this?

-- Doug Wilson