Back to results
US 5,609,091 AGranted
Fluid power advancing unit
AssigneeFesto AG & Co.
InventorKurt Stoll
Life of this patent
Estimating the term…
Abstract
A fluid power operated advancing unit has housing and a plunger adapted to run axially therein. The plunger is designed in the form of a three sided prismatic body at least along its length section running in the housing, said body being guided in the housing at its three side surface, whereas three transitions between respective adjacent side are not guided. The result is accordingly an extremely accurate guiding action for the plunger while simultaneously preventing rotation thereof.
Claims19
A fluid power advancing unit, comprising:
- a housing having an axial bore opening at a first end thereof, a plunger adapted to slide axially in the bore of the housing for extension out from the first end of the housing owing to a supply of a drive fluid into a working space delimited by the plunger, wherein the plunger is designed in the form of a three-sided substantially triangular-shaped body at least in a part thereof able to slide in the housing, the triangular-shape preventing rotation, providing accurate guiding and being able to resist loads thereon, the plunger being guided along each of the three sides of the body, whereas three transition parts between each two respectively adjacent side surfaces are not guided thereby eliminating redundant guiding of the plunger, the advancing unit further including first guide elements fixed in the axial bore of the housing adjacent the first end thereof, and second guide elements fixed on the plunger at an end distal to the housing opening, the second guide elements sliding within the axial bore of the housing upon activation of the plunger.
A fluid power advancing unit comprising:
- a housing having an axial bore therein opening at a first end thereof;
- a plunger adapted to slide axially in the bore of the housing for extension therefrom under the influence of a drive fluid, wherein the axial bore in the housing and the plunger are substantially triangular in cross-section;
- first guide elements fixed in the axial bore of the housing adjacent to the first end thereof;
- and
- second guide elements fixed on the plunger at an end distal to the housing opening, said second guide elements sliding within the axial bore of the housing upon activation of the plunger.
2 more elements
A fluid power advancing unit comprising:
- a housing having an axial bore therein opening at a first end thereof;
- a plunger adapted to slide axially in the bore of the housing for extension therefrom under the influence of a drive fluid;
- first guide elements fixed in the axial bore of the housing adjacent to the first end thereof;
- and
- second guide elements fixed on the plunger at an end distal to the housing opening, said second guide elements sliding within the axial bore of the housing upon activation of the plunger, wherein the first and second guide elements are tabular in form and are positioned on side guide surfaces of the axial bore and plunger, respectively.
2 more elements
Dependencies are inferred from the claim text.