Door closer with means for damping the closing movement of the door
Abstract
Abstract 1,170,320. Door closer. VEREINIGTE BAUBESCHLAGFABRIKEN GRETSCH & CO. G.m.b.H. 20 Oct., 1967 [12 Nov., 1966 (2)], No. 47749/67. Heading E2M. A door closer has a piston 29, movable in a clamping cylinder 7, by means of a tubular piston rod 27, which piston is subject to the influence of a closer spring 25 and is provided with an overflow valve 36, and having a control pin 48 penetrating through the piston and guided in the piston rod, with a throttle cross section which varies over its length, characterised in that the control pin is subject to the influence of a spring 45, which bears on an externally accessible regulating pin 42 and a stop screw 52 is provided upon which the control pin bears during a part of the piston travel.
Inventors
- 👤 Reinhold Voster
- 👤 Carl Dietz
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |