Home| FAQ Search:Advanced|Person|Company| Type|Class Login
Quick search:
Patent number:
Patent Date:
first    back  next  last
US Patent: 1,222,229
Valve Releasing Device
Patentee:
Robert L. Mapson (exact or similar names) - San Diego, CA

USPTO Classifications:
222/219, 29/213.1

Tool Categories:
specialty tools : valve spring tools

Assignees:
Robert L. Mapson - San Diego, CA
Lorenzo Sperbeck - La Mesa, CA

Manufacturer:
Mapson Mfg. Co. - San Diego, CA

Witnesses:
none listed
Patent Dates:
Applied: Mar. 20, 1916
Granted: Apr. 10, 1917

Patent Pictures: [ 1 | 2 ]
Robert L. Mapson patent April 10, 1917
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Stan Schulz
Description:
The adjustment is accomplished by a roughly parallelogram frame structure, and held by a spring-tensioned latch.

Advertising for the MAPSON "Perfection" Valve Lifter claimed, "the action is all above the cylinder head."

A known example gives the company's location as Los Angeles.

Copyright © 2002-2025 - DATAMP