Abstract: A device (10) for removing contaminants from truck air systems or the like includes an assembly including a desiccant canister (100), a carrier (46), and a bottom closure (28) vertically removable in a passage (14) of a collar (12) mounted to the truck. The carrier (46) includes a horizontal plate (48) which divides the passage (14) into a coalescing chamber having a horizontally orientated, tubular coalescing filter (98) extending vertically above and diametrically over the sump including an electrically actuated purge valve (42) of the bottom closure (28). Air is directed vertically downward from the filter (98) by vertical legs (62) extending down from the horizontal plate (48) and on opposite sides of the filter (98). A follower plate (118) is biased in the canister (100) against the desiccant beads (116) by a wave spring (140) sandwiched thereagainst by a slideable retainer (142) fixed in the side wall (104) of the canister (100).

Abstract: A device (110) for protecting a clutch (C) against overheating from externally caused problems such as rapid cycling is disclosed including a heat conductive plug (120) sealed in an escape port (116) of a fitting (112) by fuse material (124) such as lead. The fitting (112) is threadably, sealably received in a bore (104) formed in the friction interface disc (12) of the clutch (C). The bore (104) is in fluid communication with the cylinder (30) of the clutch (10) which slideably mounts a piston (10) connected to the friction interface disc (12). Fluid pressure introduced into the cylinder (30) by conventional conduits (42) moves the piston (10) therein against the bias of a spring (56) when fluid flow from the cylinder (30) through the bore (104) is blocked by the overheating protection device (110).

Abstract: Rotational control apparatus in the form of fan clutches (C) are disclosed including a first, friction disc portion (12) splined on a hub (20) and rotatably mounted on a shaft (24). The friction disc portion (12) is reciprocal between a first position rotatably related to the facing (52) of a sheave (50) rotatably mounted on the hub (20) and a second position rotatably independent of the sheave (50). A second friction disc portion (212) is splined on the hub (20) and is reciprocal between a first position rotatably related to the facing (252) of a second sheave (250) rotatably mounted on the hub (20) and rotating at a different rotational speed than sheave (50). By selective engagement of the friction disc portions (12, 212), the hub (20) will be rotated on the shaft (24) at either the rotational speed of the first sheave (50) or the second sheave (250). In another form, a second, friction disc portion (112) is rotatably mounted on a reciprocal piston (100) and rotatable relative to the hub (20).

Abstract: A rotational control apparatus in the preferred form of a fan clutch is disclosed including a friction disc portion slidably mounted and rotationally related by splines on a hub in turn rotatably mounted on a fixed shaft. The splines are formed on a radially outermost portion of the hub. A washer abuts with a shoulder formed in the hub at the intersection of a radially reduced portion with the radially outermost portion and with a retainer on the free end of the radially reduced portion sandwiches a spring in a compressed condition on the reduced portion. In an assembled relation, the friction disc portion abuts with the washer such that the spring biases the friction disc portion. The friction disc portion may be slid from the hub without removal of the hub from the shaft and with the spring retained on the hub by the washer. Both sides of the friction disc portion taper together such that the thickness therebetween decreases with the radial spacing from the rotational axis.

Abstract: A modular unit for use with a fluid engaged spring released and a spring engaged fluid released fan clutch including an outer hollow hub which terminates in a radially extending annular friction flange with an annular flange connected to the outer hollow hub for connection with a live shaft. Also provided is an inner central hub mounted internally of said outer hub by means of a pair of bearings. The inner central hub terminates in an enlarged central portion which in turn terminates in a radially disposed circular wall portion terminating in a series of right angular flanges. An annular piston is provided which is slideably mounted on the enlarged central portion of the inner hub. A ring is provided having a series of fan blades extending therefrom and connected to the circular wall. The piston has a friction facing carried thereby.

Abstract: A self-contained fan clutch including a housing in which is contained a rotatable drive disc driven by a source of power connected to the housing and the drive disc. Also mounted within the housing is an annular piston having an annular piston portion reciprocable within a cylinder member, the piston portion carrying a friction facing engageable with the driven drive disc when the piston is actuated within the cylinder. The piston divides the cylinder into a high pressure side and a low pressure side with the piston, piston portion and cylinder carried by the housing with the housing having a series of fan blades mounted thereon.The cylinder member mounts a reciprocal pump plunger actuated by a cam mounted on the driven drive disc for pressurizing the high pressure side of the cylinder which causes the friction facing of the piston portion to engage the drive disc and be rotated together with the housing and fans thereon. The pump plunger is actuated by a thermal sensor pill.

Abstract: A spring engaged fluid released fan clutch is disclosed. A sheave connected to a live shaft is connected to rotate with a friction disc. Encompassing the friction disc and rotatable relative thereto is an outer shell portion carrying fan blades. Connected for rotation with the outer shell portion and rotatably mounted on the friction disc is a cylinder plate. An annular piston, having a friction facing, is slidably mounted on a hub provided internally of the outer shell portion and is connected to rotate with the shell portion. Springs urge the piston with its friction facing into engagement with the friction disc to engage the clutch. Fluid pressure is introduced through the hub of said outer shell portion and into a cavity between the cylinder plate and the piston urging the piston away from the friction disc against the action of the springs to disengage the clutch.

Abstract: A fluid engaged and spring returned fan clutch for connection with a live rotative source of power including an annular mounting flange for connection with the source of power. The mounting flange terminates in a hub. Also included is an annular friction flange connected to the hub. A first outer shell section is rotatively mounted on the hub and connected to a second outer shell section with fan blades connected thereto. A circular face plate is connected to the second outer shell. A circular piston is axially and slideably mounted on and within the second outer shell section and axially of the face plate thereby forming a cylinder void between the piston and the face plate. A circular resilient bladder member is secured at its peripheral edge portion between the second outer shell section and the face plate with the bladder adjacent the piston and opposed to the face plate. The piston has a ring of friction material connected thereto.

Abstract: A fluid engaged spring released fan clutch having a modular mount usable with a spring engaged fluid released fan clutch is shown according to the teachings of the present invention. The modular unit includes a friction disc and a first outer shell section rotatably mounted thereto. The fluid engaged clutch portion includes a second shell section having an annular cylinder formed therein. A piston having a friction ring mounted thereon is reciprocably received on the annular cylinder and biased by spring means mounted between the piston and the modular mount. A rotary union is mounted on the second shell section for conduction of fluid pressure to cause the piston to move and engage with the friction disc. The spring engaged clutch portion includes a second shell section having a cylindrical plate held in a spaced relation therefrom.

Abstract: A friction interface unit is shown according to the teachings of the present invention for use with a clutch, a brake, or a clutch-brake. The unit includes a hub having an annular friction flange and adapted to receive a shaft. A first housing portion is rotatably supported by a pair of bearings interposed between and in radial alignment with the hub and the first housing portion. The first housing portion is adapted to be associated with a sheave, an anchor mount for a brake, or a ring disc for a caliper brake. A second housing portion is further provided which has a central circular portion and which is bolted to the first housing portion thereby forming a full housing. Also included is a piston having an annular flange extended over said central circular portion to form a cylinder with a single O-ring.

Abstract: A thermoshield primarily intended to be used for protecting a wall from the heat that may develop by a free-standing heating appliance or space heater that may be situated in proximity to the wall. However, certain structure of the device may be adapted to be used for restingly supporting thereon the heating appliance, thus protecting a floor from the heat developed thereby. The thermoshield features a sub-assembly of particular construction which serves as a heat barrier in either of the above mentioned dispositions, and peculiar support structure for supporting the sub-assembly in place between the heating appliance and the wall to be protected. A significant feature of the support structure is that the sub-assembly remains absolutely unaltered by the implementation of the support structure.

Abstract: A fluid set and spring released clutch according to the teachings of the present invention is shown as including a one-piece hub including a cylindrical portion having a first tapered hole portion for securement to a shaft and a second cylindrical hole portion for receiving a rotary air union. A radially extending flange portion terminating in an annular lip is formed on the cylindrical portion of the hub and forms an annular cavity for the reciprocal receipt of a piston. The clutch further includes a pulley rotatably received on the hub having a recess formed therein. An extension integrally attached to the piston extends into the recess of the pulley for providing friction engagement therebetween. The piston is mounted by bolts threadably secured into the extension and reciprocally received in the annular lip of the hub. The piston is biased into the cavity by springs located between the piston and the hub.

Abstract: A spring engaged fluid released fan clutch is disclosed. A sheave connected to a live shaft is connected to rotate with a friction disc. Encompassing the friction disc and rotatable relative thereto is an outer shell portion carrying fan blades. Connected for rotation with the outer shell portion and rotatably mounted on the friction disc is a cylinder plate. An annular piston, having a friction facing, is slidably mounted on a hub provided internally of the outer shell portion and is connected to rotate with the shell portion. Springs urge the piston with its friction facing into engagement with the friction disc to engage the clutch. Fluid pressure is introduced through the hub of said outer shell portion and into a cavity between the cylinder plate and the piston urging the piston away from the friction disc against the action of the springs to disengage the clutch.