Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
192 words
A damping device for electric circuit breakers, said damping device comprising: a housing (1) filled with a damping liquid, a damping cylinder (2) within said housing, said cylinder being movable in its axial direction, a piston (4) within said cylinder, said piston being connectible to the movable contact of a circuit breaker and being movable between a first end position and a second end position, said first and second end positions corresponding to the closed and open positions of the circuit breaker, respectively, said piston limiting two cylinder spaces (6, 8) positioned on opposite sides of the piston and having restricted outlet openings (13, 16), a spring means (12) for biasing said damping cylinder axially, said damping cylinder being moved by said piston against the action of said spring means to a lock position when said piston is moved from said first to said second end position, latching means (22) for retaining the damping cylinder (2) in said lock position, said outlet openings of the cylinder space on that side of the piston facing said first end position being blocked in said locking position, whereby reverse movement of the piston is prevented.
Claim 2
Dependent Claim
192 words
A damping device for electric circuit breakers, said damping device comprising: a housing (1) filled with a damping liquid, a damping cylinder (2) within said housing, said cylinder being movable in its axial direction, a piston (4) within said cylinder, said piston being connectible to the movable contact of a circuit breaker and being movable between a first end position and a second end position, said first and second end positions corresponding to the closed and open positions of the circuit breaker, respectively, said piston limiting two cylinder spaces (6, 8) positioned on opposite sides of the piston and having restricted outlet openings (13, 16), a spring means (12) for biasing said damping cylinder axially, said damping cylinder being moved by said piston against the action of said spring means to a lock position when said piston is moved from said first to said second end position, latching means (22) for retaining the damping cylinder (2) in said lock position, said outlet openings of the cylinder space on that side of the piston facing said first end position being blocked in said locking position, whereby reverse movement of the piston is prevented.
Claim 3
Dependent Claim
41 words
A damping device according to claim 1, wherein said piston (4) supports a plunger (21) or the like, which is arranged, in said second end position of the piston, to influence said latching member (22) for releasing the damping cylinder (2).
Claim 4
Dependent Claim
70 words
A damping device according to claim 1, wherein said damping cylinder (2) is movable inside a guiding cylinder (9) which is fixedly joined to the damping device housing (1) and in which are arranged restricted openings (14) which in the rest position of the damping cylinder (2) are positioned in alignment with the restricted openings (13) in the cylinder space (6) located on the closed-position side (5) of the piston.
Claim 5
Dependent Claim
69 words
A damping device according to claim 1, wherein said restricted openings (13, 16) open out into a space (15) located between the damping cylinder (2) and the wall of the housing (1) of the damping device, a nonreturn valve (18) being arranged between said space (15) and the cylinder space (6) on the closed-position side (5) of the piston for free supply of liquid to said cylinder space (6).