American Automobile Industry Innovations, 1920-1940

US Automobile Innovations, 1920-1940

1921 – Hudson/Essex – Closed Steel Bodied Automobile

1922 – 1^st Carburetor Air Cleaner

1923 – Packard – 4 Wheel Brakes

1924 – Tetra Ethyl Lead Gasoline Additive

1924 – Balloon Tires Standard

1924 – Thermostatic Control of Cooling System

1924 – Chrysler – High Compression Engine with 7 Bearing Crankshaft

1925 – 1^st Hydraulic Shock Absorber

1926 – 1^st Chrome Plating

1928 – Safety Glass Windshield Standard

1928 – Fuel Pumps Introduced

1929 – Downdraft Carburetor

1929 – Automobile Radio

1931 – Hydraulic Valve Lifters Introduced

1931 – 1^st Automatic Choke

1931 – 1^st inside Sun Visors

1931 – Buick – Buick – Vacuum Powered Clutch

1931 – Dodge Vacuum Powered Clutch

1931 – Plymouth – Flexible Engine Mounting

1932 – Hudson -- Ignition Key Starting

1933 – First Turn Signal

1934 – GM Independent Front Suspension

1934 – Chrysler – Airflow Design – Body and Frame Combined

1935 – Introduction of Lincoln Zephyr

1935 – GM – All Steel Roof

1935 – Sloping Side Windows Built In

1935 – Defrosters

1937 – Oldsmobile – “Automatic” Transmission

1937 – Studebaker – Windshield Washers

1937 – Nash – Fresh-Air Heater