Piston assembly for door closer

Details Piston assembly for door closer Piston assembly for door closer

1976-01-13

1977-04-26

Schroeder, Werner H.

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Liquid

16 62, 74422, 92136, 403356, 403404, E05F 304, F16H 104

Patent

active

040192202

ABSTRACT:
Hydraulic door closer apparatus comprises a cylinder and an elongated piston disposed in the cylinder, the piston being made of relatively easily machined material, but having associated with it a rack of harder, wear and impact-resistant material for transmitting forces and motion to and from the piston.

REFERENCES:
patent: 1002236 (1911-09-01), Dumont
patent: 1115557 (1914-11-01), Livermore
patent: 2024472 (1935-12-01), Norton
patent: 2192745 (1940-03-01), Hurd
patent: 3399494 (1968-09-01), Hendrickson
patent: 3777589 (1973-12-01), Adams
patent: 3834247 (1974-09-01), Belsdorf et al.

Affiliated with

Also associated with

Rating

Piston assembly for door closer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piston assembly for door closer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston assembly for door closer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2080816