Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Washer structure – Sealing
Reexamination Certificate
2007-01-09
2010-10-12
Estremsky, Gary (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Washer structure
Sealing
C220S304000, C220S378000, C215S356000, C277S644000
Reexamination Certificate
active
07811039
ABSTRACT:
A screw loosening prevention structure and a gas-pressure device are provided. The structure includes a first member that is formed with a container space filled with gas, and includes a first threaded portion, a second member that includes a second threaded portion, wherein the second member is threadedly coupled with the first member by threadedly engaging the second threaded portion with the first threaded portion, and receives a pressure from the gas in the container space of the first member, and a spring member provided between the first and second members in a deformed state in which the displacement of the spring member is greater than a relative displacement of the first and second members due to a loosening factor including the gas pressure that is received by this second member.
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ISA European Patent Office, Search Report of EP 07 25 0132, Feb. 25, 2010, Germany, 4 pages.
Ito Hiroshi
Ninomiya Makoto
Nomichi Kaoru
Suzuki Yutaka
Alleman Hall McCoy Russell & Tuttle LLP
Estremsky Gary
Kabushiki Kaisha Kawasaki Precision Machinery
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