Driving device
AssigneeKoki Holdings Co., Ltd.
InventorKohei FUJISAWA
Life of this patent
Estimating the term…
Abstract
A driving device includes an operable striking unit, a piston upper chamber configured to operate the striking unit by gas pressure, a housing, a head cap provided in the housing, a passage provided in the head cap, and an exhaust valve operably provided in the housing and configured to open and close the passage. The exhaust valve includes a contact portion and a non-contact portion, the contact portion comes into and out of contact with the head cap on an outer side of the passage in a radial direction of the passage, the non-contact portion is provided on an inner side of the contact portion in the radial direction of the passage, and the non-contact portion is provided at a position separated from the head cap in a state where die contact portion is in contact with the head cap.
Claims9
A driving device, comprising:
- an operable striking unit;
- a first pressure chamber configured to operate the striking unit by gas pressure;
- a housing in which the striking unit and the first pressure chamber are provided and a valve seat fixed in the housing;
- a passage provided in the valve seat and connecting the first pressure chamber and an outside of the housing;
- and
- a valve body operably provided in the housing and configured to open and close the passage by coming into and out of contact with the valve seat,
- wherein the valve body includes a contact portion and a non-contact portion arranged outside the first pressure chamber,
- wherein the contact portion opens and closes the passage by coming into and out of contact with the valve seat on an outer side of the passage in a radial direction of the passage in a first direction intersecting an operation direction of the valve body,
- wherein the non-contact portion is provided on an inner side of the contact portion in the radial direction of the passage in the first direction, and
- wherein the non-contact portion is provided at a position separated from the valve seat in the operation direction of the valve body in a state where the contact portion is in contact with the valve seat in a second direction which is the operation direction of the valve body.
Dependencies are inferred from the claim text.