A safety lock is disclosed and comprises a body, a bolt and a handle. The body is securable to one member. The bolt is mounted to the body for reciprocation between projecting and retracted positions. In the projecting position, a bolt end portion protrudes beyond the body and is engageable in anoth
A safety lock is disclosed and comprises a body, a bolt and a handle. The body is securable to one member. The bolt is mounted to the body for reciprocation between projecting and retracted positions. In the projecting position, a bolt end portion protrudes beyond the body and is engageable in another member, to prevent relative movement of the members. In the retracted position, the end portion is incapable of engagement in the other member, to permit said relative movement. The handle is releasably engageable to the bolt. The handle, body and bolt are adapted such that when the handle is engaged to the bolt, the handle permits manual reciprocation of the bolt, and are further adapted such that when the handle is disengaged from the bolt and the bolt end portion is inaccessible for manual manipulation, the bolt is inaccessible for said manual reciprocation.
대표청구항▼
1. A safety lock comprising: a body;a bolt mounted to the body for movement between a disengaged position and an engaged position;a handle including a shell that has a longitudinal axis, and the handle further includes a plunger that is moveable within the shell along the longitudinal axis, the shel
1. A safety lock comprising: a body;a bolt mounted to the body for movement between a disengaged position and an engaged position;a handle including a shell that has a longitudinal axis, and the handle further includes a plunger that is moveable within the shell along the longitudinal axis, the shell being releasably engageable to a first end of the bolt; anda pair of springs surrounding a respective one of the plunger and the bolt;wherein the handle, body and bolt are adapted such that when the shell is engaged to the first end of the bolt, the handle permits manual movement of the bolt and when the shell is disengaged from the bolt, the first end of the bolt is retained within the body such that the bolt is inaccessible for said manual movement;wherein the shell is disengaged from the bolt upon movement of the plunger towards the bolt; andwherein the bolt and the plunger are a pair of separate components. 2. A lock according to claim 1, wherein: the disengaged position is a retracted position; the engaged position is a projecting position whereat a second end of the bolt protrudes beyond the body; when the shell is engaged to the bolt, the handle permits manual reciprocation of the bolt; and, when the first end of the bolt is inaccessible for manual manipulation, the bolt is inaccessible for said manual reciprocation. 3. A lock according to claim 2, wherein: the shell, when engaged to the bolt, extends from the bolt to terminate in a pull, and the bolt is manually reciprocable by the pull. 4. A lock according to claim 3, further comprising a bolt spring acting to resiliently bias the bolt for movement to the projecting position. 5. A lock according to claim 4, wherein the bolt is rotatable within the body and the bolt and body are shaped such that when the bolt and body are in alignment, the bolt spring, in the absence of external force, moves the bolt to the projecting position; andwhen the bolt is rotated relative to the body out of said alignment, the body restrains the bolt against movement to the projecting position. 6. A lock according to claim 5, wherein the pull terminates in a rim which projects away from the longitudinal axis of the shell. 7. A lock according to claim 1, wherein: the handle releasably engages the bolt in a plug and socket connection, the plug being defined by the handle and the socket being defined by the bolt;wherein the socket has one or more recesses disposed on its periphery;wherein the shell has a tab for each of said one or more recesses; andwherein each tab releasably engages one of the recesses to provide for said releasable engagement of the handle and the bolt. 8. A lock according to claim 7, wherein each tab is adapted to flex inwardly towards the longitudinal axis of the shell for the release of the handle from the bolt. 9. A lock according to claim 7, wherein the plunger is moveable from a restraining position, wherein the plunger is disposed inwardly from each tab to restrain same against inward flexure, to a release position, wherein each tab is free for said inward movement. 10. A safety lock comprising: a body;a bolt mounted to the body for reciprocation between a retracted position and a projecting position whereat a second end of the bolt protrudes beyond the body;a handle including a shell having a longitudinal axis, and the handle further includes a plunger that is moveable within the shell along the longitudinal axis, the shell being releasably engageable to a first end of the bolt; anda pair of springs surrounding a respective one of the plunger and the bolt;wherein the handle, body and bolt are adapted such that: when the shell is engaged to the first end of the bolt, the shell extends from the bolt to terminate in a pull by which the bolt is manually moveable; and when the shell is disengaged from the bolt said first end of the bolt is retained within the body and inaccessible for manual manipulation;wherein the pull of the shell is annular and has the plunger mounted therewithin for movement along the longitudinal axis the shell, the plunger being actuable to release the shell from the bolt and to engage the shell to the bolt; andwherein the bolt and the plunger are a pair of separate components. 11. A safety lock comprising: a body;a bolt mounted to the body for reciprocation between a retracted position and a projecting position whereat a second end of the bolt protrudes beyond the body;a handle including a shell that has a longitudinal axis, and the handle further includes a plunger that is moveable within the shell along the longitudinal axis, the shell being releasably engageable to a first end of the bolt; anda pair of springs surrounding a respective one of the plunger and the bolt;wherein the handle, body and bolt are adapted such that when the shell is engaged to the first end of the bolt, the handle permits manual reciprocation of the bolt and when the shell is disengaged from the bolt the first end of the bolt is retained within the body and inaccessible for manual manipulation,wherein: the shell releasably engages the bolt in a plug and socket connection, the plug being defined by the handle and the socket being defined by the bolt; the socket has one or more recesses disposed on its periphery; the plug has a tab for each of said one or more recesses; and each tab releasably engages the recess for which it is provided to provide for releasable engagement of the handle and the bolt, wherein each tab is adapted to flex inwardly towards the axis for the release of the handle from the bolt;the plunger, upon actuation, moves from a restraining position, wherein the plunger is disposed inwardly from and abutting each tab to restrain same against inward flexure, to a release position, wherein each tab is free for said inward movement; andwherein the bolt and the plunger are a pair of separate components. 12. A lock according to claim 11, wherein in the restraining position, an end of the plunger is disposed inwardly from each tab, to restrain said each tab against the inward flexure; andin the release position, a reduced girth portion of the plunger, set back from the end, is disposed inwardly from each tab, so that each tab is free for the inward movement. 13. A lock according to claim 1, wherein the body comprises a base portion and a cover portion, the base portion and the cover portion having longitudinally extending recesses and pairs of inter-engaging longitudinally-extending keyways, respectively on opposite sides, to enable the cover portion to be slidably attached to and detached from the base portion; andwhen the base portion is operatively mounted on an element to be secured by the lock to another element, and the element to be secured and the other element are positioned for said securement, the cover portion is not slidably detachable from the base portion as a result of interference with the other element. 14. A lock according to claim 13, wherein one of the keyways in the cover portion has enlarged end portions which each receive a peg at the corresponding end of the keyway in the base portion so that the cover portion, if mounted with the pegs disposed on the end of the body through which the end portion of the bolt protrudes, is more readily removed by sliding the cover portion in the direction in which bolt protrudes.
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