US 11,911,885 B2
Driving tool
Eiichi Watanabe, Tokyo (JP); Takashi Yuki, Tokyo (JP); Yu Yamamoto, Tokyo (JP); and Mitsuhiro Kimura, Tokyo (JP)
Assigned to Max Co., Ltd., Tokyo (JP)
Filed by MAX CO., LTD., Tokyo (JP)
Filed on Feb. 3, 2021, as Appl. No. 17/166,043.
Application 17/166,043 is a continuation of application No. 16/251,222, filed on Jan. 18, 2019, granted, now 10,940,579.
Claims priority of application No. 2018-007520 (JP), filed on Jan. 19, 2018; application No. 2018-007521 (JP), filed on Jan. 19, 2018; application No. 2018-007633 (JP), filed on Jan. 19, 2018; application No. 2018-022480 (JP), filed on Feb. 9, 2018; application No. 2018-022481 (JP), filed on Feb. 9, 2018; application No. 2018-022482 (JP), filed on Feb. 9, 2018; application No. 2018-026624 (JP), filed on Feb. 19, 2018; application No. 2018-084498 (JP), filed on Apr. 25, 2018; application No. 2018-084499 (JP), filed on Apr. 25, 2018; application No. 2018-084500 (JP), filed on Apr. 25, 2018; and application No. 2018-084501 (JP), filed on Apr. 25, 2018.
Prior Publication US 2021/0154818 A1, May 27, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B25C 1/08 (2006.01); B25D 9/10 (2006.01); F02B 63/02 (2006.01); F01L 9/10 (2021.01)
CPC B25C 1/08 (2013.01) [B25D 9/10 (2013.01); F02B 63/02 (2013.01); F01L 9/10 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A driving tool comprising:
a striking mechanism configured to be actuated by a combustion pressure of a mixed gas of compressed air and fuel;
a combustion chamber in which the mixed gas of compressed air and fuel is to be combusted; and
a valve member configured to be actuated by pressure variation of the combustion chamber, and to open and close communication between the striking mechanism and the combustion chamber, the valve member including a valve member cylinder,
wherein the combustion chamber is provided around the valve member,
wherein the valve member includes a valve surface at a lower end face in an axial direction of the valve member cylinder, and a largest diameter of the valve surface is smaller than a largest diameter of the striking mechanism, and
wherein the striking mechanism includes an inlet connecting the combustion chamber and the striking mechanism, the inlet comprising an opening extending in an axial direction of the striking mechanism, and
wherein the largest diameter of the valve surface is larger than a largest diameter of the inlet of the striking mechanism.