FIELD: manufacturing technology.
SUBSTANCE: invention relates to door closing devices. Door closer comprises a pneumatic or hydraulic cylinder with a piston and a rod, a check valve in the piston, characterized in that the piston is located in the working cylinder with a gap, in one of the cavities of the working cylinder there is a sealed cavity, and in the working cylinder wall there is a slot with length exceeding width of the piston, or two holes, spaced from each other by a value greater than the width of the piston.
EFFECT: disclosed door closer for door closing.
1 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| HYDRAULIC VARIATOR (VERSIONS) | 2006 |
|
RU2419011C2 |
| LANDING GEAR (VERSIONS) | 2006 |
|
RU2356794C2 |
| RECOIL DEVICE - 3 | 2016 |
|
RU2620179C1 |
| AUTOMATIC GUN-12 (VERSIONS) | 2014 |
|
RU2568629C2 |
| STAROVEROV'S CHASSIS | 2011 |
|
RU2514325C2 |
| LONG-RANGE GUN OF STAROVEROV | 2008 |
|
RU2391617C2 |
| AUTOMATIC WEAPON /VERSIONS/ | 2012 |
|
RU2513885C1 |
| STATIONARY SYSTEM FOR NURSE (VERSIONS) | 2013 |
|
RU2542538C1 |
| DEVICE TO INCREASE COMBAT VEHICLES CROSS-COUNTRY CAPACITY | 2010 |
|
RU2431109C1 |
| DISPLACEMENT-TYPE LIQUID-PROPELLANT ROCKET (VERSIONS) | 2011 |
|
RU2468333C1 |
