Compression-relieving mechanism — Harley-Davidson patent US1301256A (1919)
PatentUS1301256A
TypeUtility patent
Filed1917-09-19
Granted1919-04-22
InventorWilliam S Harley
SystemEngine
“W. S. HARLEY. COMPRESSION RELIEVJNG MECHANISM. APPLICATION FILED SEPT. 19, 1917. ' 1,30 1 2 56, Patenfed Apr. 22, 1918. 2 SHEETS-SHEET l. W. S. HARLEY. COMPRESSION RELIEVING MECHANISM. APPUCATION FILED SEPT. 19 I9! 7. Patented Apr. 22,1919. 2 SHEETS-SHEET 2. - "I: mum; Pam: m. ruamurnm. msmmzwu. u…”
Drawings (2 sheets)


Parts for this system
32-0064
Magneto to Crankcase Oil Seal Ring and Gasket Kit
$6.3514-0555
Rear Caliper Piston O-Ring
$10.6415-1380
Rear Master Cylinder Gasket Kit
$10.6423-0825
Handlebar Master Cylinder Piston Cup
$10.64Check fitment first — add your bike and we flag what fits.
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Drawing from the US patent record (via Google Patents). A patent shows the invention as filed, not necessarily the production part on your motorcycle — confirm fitment for your model and year. Independent aftermarket retailer, not affiliated with Harley-Davidson, Inc.