Joints and connections – Rotarily connected – differentially translatable members,... – Having operating mechanism
Patent
1989-06-26
1990-07-03
Reese, Randolph A.
Joints and connections
Rotarily connected, differentially translatable members,...
Having operating mechanism
403 46, 403165, 403305, 403379, 2803041, F16B 706, F16G 1112
Patent
active
049386239
ABSTRACT:
A locking bar for blocking relative movement of movable parts of a device, particularly providing anti-theft nature to devices such as wheelchairs which would probably be manipulated to a collapsed condition as an incident to a theft of the device; and anti-theft nature is especially provided by the locking bar made to appear to be merely a non-removable axle, yet made shortenable for removal, and thus chair-collapsability by authorized personnel, by an internal sliding operativity which is concealed but which achieves length-changing be engagement of screw-threaded parts to permit manual torque-application to movable parts to achieve the length-changing, the sliding member being a socket whose sliding into or from its length-changed position is effected merely by tilting to achieve positioning by gravity.
REFERENCES:
patent: 925901 (1909-06-01), Hardick
patent: 2352585 (1944-06-01), Camburn
patent: 2678225 (1954-05-01), Wright
patent: 2900203 (1959-08-01), Hayden
patent: 3719377 (1973-03-01), Schultz et al.
Everest and Jennings, International, 1987 Catalog, "Lifestyles", p. 18.
DeLiguori Franco S.
Leads Metal Products, Inc.
Reese Randolph A.
Spray Robert A.
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