Air-mo Hydraulics Inc.

Honeywell G.m.b.h.

Reel Precision Maufacturing Corporation

Robert F Rasmussen

Robert L Wietecha

Gary L Pearson

George R Smida

Lee W Johnson

Robert L Wahlstedt

Richard A Evans

A hydraulic chuck haging a piston means with an axially centered fluid passage and a tube seating means on one end thereof. Collet means are provided and are mounted on the piston means such that axial movement of the piston means operates the collet means. The chuck body is slideably mounted on the piston means and has a nose cone means fixedly mounted on the body means. The nose cone means includes a collet engaging surface to close the collet upon engagement of the surface and the collet means. Seal means for preventing passage of fluid between the tube and the collet means are provided and include a seal cartridge means adjacent to tube seating means on the piston means. Seal seat means are slideably contacting the cartridge means and keyed to the collet means to define a seal cavity between the seal seat and the seal cartridge. The cavity has a first size when the collets are open and a smaller second size when the collets are closed. Finally, o-ring seal means are positioned in the cavity, having a larger cross section than the cavity when the collets are closed. The o-ring seal means may be constructed so as to have an uncompressed inner diameter greater than the diameter of the tube which fits the chuck device. In addition, the o-ring seal means may have an outer diameter slightly larger than the maximum diameter of the cavity so as to keep the o-ring out of contact with the tube when the collets are open. The device may further include pneumatic means on said body means to move the body with respect to the piston to close the collet without the presence of fluid in the fluid passage, whereby the device grips the tube and activates the o-ring seal prior to presence of fluid in the passage.

Hydraulic chuck with improved seal

A rotary fluid coupling for use with such devices as tracking concentrating solar collectors is disclosed which is capable of providing excellent sealing characteristics over a wide temperature range at relatively low internal fluid pressures. The coupling includes a stationary body member which defines an internal fluid passage operating in conjunction with a conduit member one end of which is received the stationary body member forming a continuous passage therethrough wherein the conduit member is rotatable within the stationary body. A dual sealing system is employed in which a pair of resilient radial seals are utilized spaced axially along the interface between the stationary member and the conduit member. Any leakage past the first seal is collected through a drain opening in the stationary member between the two radial seals. A container may be attached to the drain opening to indicate and collect any leakage at the rotary joint. In this manner the second seal, then, becomes a pressure seal and the leakage container prevents any possible damage being done by the leakage of corrosive fluids from the system and serves to indicate required maintenance. The rotary joint solves the problem of preventing leakage over a wide temperature range in a low-cost, simple manner.

Dual-seal rotary fluid coupling

A hydraulic chuck having a piston means with an axially centered passage, the first end of which has a tube seating means associated therewith for engaging a tube. Collet means are provided and located at the first end of the piston means for engagement of the tube upon closure of the collet means. Biasing means operably connected to the piston means for normally forcing the surface means upon the collet means are also provided. Sealing means adjacent to tube feeding means for sealing the tube to the chuck, including seal seat means adjacent to collets and positioned to compress the seal radially inward under pressure of the biasing means, are provided. Finally, the handle or attachment means is provided to operably connect to the biasing means to remove the surface means from the collet means, thereby releasing the radially inward compression of the sealing means and permitting insertion of the tube.

Hydraulic chuck

An electromagnetically actuated clutch or the like having a helical spring disposed about the surface of a relatively rotatable drum, and an electromagnet with a fixed annular pole piece closely adjacent the free end coil of the spring. The spring is induced to grip the drum surface by the action of magnetic flux passing from the drum to the spring and thence directly to the polepiece.

Growing community of inventors

Minneapolis, MN, United States of America

Robert F Rasmussen