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Patent number:
Patent Date:
US Patent: 2,220,037
Double-acting drop hammer
Patentee:
Reginald P. Fitzgerald (
exact
or
similar
names) - Braintree, MA
USPTO Classifications:
15/104.095
,
72/20.2
,
72/438
,
72/441
,
72/453.18
Tool Categories:
metalworking machines
:
forging machines
:
drop hammers
Assignees:
Pneumatic Drop Hammer Co.
- Braintree, MA
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Oct. 11, 1939
Granted:
Oct. 29, 1940
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Description:
Improvements to patent
1,990,476
.
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