Dynamic seal construction

Expansible chamber devices – With guide or seal on cylinder end portion for piston or... – Non-metallic seal means between piston or member and end...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

92165R, 277103, 277110, 277 99, 277102, 277123, 277125, F16J 1518

Patent

active

049361970

ABSTRACT:
In a preferred embodiment of hydraulic actuator wherein a piston rod is longitudinally positionable via a tail end of a cylinder, tail-end static and dynamic seal members are of plastic, of relatively elongate trapezoidal section, and a single metal spring axially preloads the two seal members in compression, via the series-related respective ends of the seal members. Engagement with the ends of each seal member are frusto-conical, to substantially match the sloped ends of the trapezoidal section, and the slope directions of these seal-member engagements are (in the case of the dynamic seal) such as to locally impart radially inwardly directed force, to drive outer ends of the seal into circumferentially uniform engagement with the piston rod of the actuator; in the case of the static seal the slope directions of seal-member engagements are such as to impart radially outwardly directed force, to drive outer ends of the static seal into similar engagement with the bore of the cylinder. Examined closely, two circumferentially continuous dynamic-seal actions are developed at the respective ends of each seal member. And the single spring assures maintenance of both of these seal actions for both static and dynamic seals, over the longer-wear life of the construction and over an unusually great range of temperature conditions.

REFERENCES:
patent: 12806 (1908-06-01), Schaefer
patent: 407533 (1889-07-01), Kellogg
patent: 745908 (1903-12-01), Ried
patent: 911228 (1909-02-01), Fulford
patent: 943835 (1908-09-01), Maltby
patent: 1798158 (1931-03-01), Hazard
patent: 1799335 (1931-04-01), Waddell
patent: 1945151 (1934-01-01), Marsh
patent: 2023898 (1935-12-01), Olson
patent: 2060209 (1936-11-01), Heckert
patent: 2567479 (1947-09-01), Hebard
patent: 2745687 (1956-05-01), Stack
patent: 2847236 (1958-08-01), Lazar
patent: 2957712 (1960-10-01), Farmer
patent: 3129948 (1964-04-01), Kendall
patent: 3264005 (1966-08-01), Bialkowski
patent: 3608912 (1971-09-01), Templin et al.
patent: 3841809 (1974-10-01), Tucker
patent: 3966235 (1976-06-01), Lewis
patent: 3968970 (1976-07-01), Vogeli
patent: 3982765 (1976-09-01), Fickelschr et al.
patent: 4170363 (1979-10-01), Bergman
patent: 4251081 (1981-02-01), Skoog
patent: 4809993 (1989-03-01), Henshaw

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Dynamic seal construction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic seal construction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic seal construction will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1118180

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.