초록 ▼

Disclosed is a vacuum valve including a lid, a depression defined on the lid, a boss formed on the lid at a bottom of the depression, a rotary cover rotatably arranged in the depression, and a closure member detachably coupled to the rotary cover. The vacuum valve comprises a through-hole defined at

Disclosed is a vacuum valve including a lid, a depression defined on the lid, a boss formed on the lid at a bottom of the depression, a rotary cover rotatably arranged in the depression, and a closure member detachably coupled to the rotary cover. The vacuum valve comprises a through-hole defined at a center portion of the closure member; a vacuum maintaining member accommodated in the closure member and having an airtightening flange part and a semi-spherical head part, the airtightening flange part being brought into close contact with a portion of the rotary cover, and the semi-spherical head part projecting upward from the airtightening flange part in a rounded manner such that, as the lid of a vacuum container is repeatedly pressed and released, air existing in a container body is discharged to the outside and vacuumization is effected in the vacuum container; and an exposure bar extending upward from the semi-spherical head part by a predetermined length such that the exposure bar can be moved upward and downward through the through-hole of the closure member depending upon a vacuumization degree to allow a user to confirm a vacuumized state of the vacuum container with the naked eye.

대표청구항 ▼

Disclosed is a vacuum valve including a lid, a depression defined on the lid, a boss formed on the lid at a bottom of the depression, a rotary cover rotatably arranged in the depression, and a closure member detachably coupled to the rotary cover. The vacuum valve comprises a through-hole defined at

Disclosed is a vacuum valve including a lid, a depression defined on the lid, a boss formed on the lid at a bottom of the depression, a rotary cover rotatably arranged in the depression, and a closure member detachably coupled to the rotary cover. The vacuum valve comprises a through-hole defined at a center portion of the closure member; a vacuum maintaining member accommodated in the closure member and having an airtightening flange part and a semi-spherical head part, the airtightening flange part being brought into close contact with a portion of the rotary cover, and the semi-spherical head part projecting upward from the airtightening flange part in a rounded manner such that, as the lid of a vacuum container is repeatedly pressed and released, air existing in a container body is discharged to the outside and vacuumization is effected in the vacuum container; and an exposure bar extending upward from the semi-spherical head part by a predetermined length such that the exposure bar can be moved upward and downward through the through-hole of the closure member depending upon a vacuumization degree to allow a user to confirm a vacuumized state of the vacuum container with the naked eye. at least partially conform to the shape of the screwthreaded member. 6. The driving tool as claimed in claim 3, wherein the actuating member is connected to the head by a flexible connection. 7. The driving tool as claimed in claim 6, wherein the flexible connection comprises a deformable part formed integrally with the head and the actuating member. 8. The driving tool as claimed in claim 1, wherein the driving means is separable from the head. 9. The driving tool as claimed in claim 8, wherein the driving means is connected to the head by a structure that is removable from the driving means and the head. 10. The driving tool as claimed in claim 1, wherein the actuating member can pivot with respect to the head. 11. The driving tool as claimed in claim 1, wherein driving means is part of a torque-measuring tool. 12. The driving tool as claimed in claim 1, further comprising means for adjusting the tendency of the head to deform in response to action of the driving means. 13. The driving tool as claimed in claim 1, wherein the head comprises two open jaws, each of which has at least one of the contact surfaces. 14. The driving tool as claimed in claim 6, wherein the flexible connection is made of elastomer, and the head comprises two open jaws, each of which defines at least one of the contact surfaces. 15. A driving tool for turning a screwthreaded member, said driving tool comprising: an elastically deformable head compromising at least two contact surfaces for driving the screwthreaded member, a connecting region connecting the contact surfaces, and force transmitting parts for transmitting a turning force to the contact surfaces, wherein the head acts as a single piece when turning the screwthreaded member; and driving means for applying a turning force to the contact surfaces of the head via the force transmitting parts, wherein the connecting region is situated between the force transmitting parts and the contact surfaces, and the head is capable of elastically deforming so that the contact surfaces move toward each other when a driving force for turning a screwthreaded member is applied through the driving means, and wherein the head has a generally H configuration and comprises two arms connected by a central web at the connecting region, a distal region of each arm having one of the contact surfaces and proximal regions of the arms form the force transmitting parts, and wherein the two arms are able to move with respect to each other by elastic deformation of the central web in order to move the contact surfaces toward each other by separation of the proximal regions of the arms, and wherein a distal region of the actuating member is positioned between the proximal regions of the arms in order to push them apart, by lever action or by cam action, when a driving force is applied to the actuating member to turn a screwthreaded member. 16. The driving tool as claimed in claim 4, wherein the actuating member is connected to the head by a flexible connection. 17. The driving tool as claimed in claim 5, wherein the actuating member is connected to the head by a flexible connection. 18. The driving tool as claimed in claim 8, wherein the actuating member is pivotal with respect to the head. 19. A hand tool for turning a screwthreaded member, said hand tool comprising: an elastically deformable head comprising at least two contact surfaces for rotatably driving the screwthreaded member, force transmitting parts for transmitting a turning force to the contact surfaces, and a connecting region connecting the contact surfaces, wherein the connecting region is located between the force transmitting parts and the contact surfaces; and an actuator associated with the force transmitting parts such that a force applied to the actuator is transmitted to the force transmitting parts to transmit a turning force to the contact surfaces of the head, wherein the actuator is operable to act directly on the force transmitting p