Abstract: A portable shelter for providing cover over an area, wherein the shelter is coupleable to a structure, the portable shelter comprising a first base member and a second base member, each of which are coupleable to the structure; two subframe assemblies, each subframe assembly comprising a vertical support member having a first end and a second end, wherein the first end is coupleable to a respective base member, at least two arm members, each having a first end and a second end, wherein the first end of each respective arm member is pivotally coupled to the second end of vertical support member, at least two brace members, each having a first end and a second end, each respective first end being coupled to the vertical support member and each respective second end being pivotably coupled to a respective arm member, a first coupling arrangement for pivotably coupling the respective first end of each arm member to the second end of the vertical support member, a second coupling arrangement, slideably coupled to

Abstract: A door assembly for use in a shelter, wherein the shelter comprises an outer frame assembly comprising a plurality of intercoupled members forming a coverable structure and a cover for covering the outer frame assembly, wherein the door assembly comprises a door frame comprising a plurality of intercoupled members; and a retractable door arrangement coupled to the door frame, wherein the retractable door arrangement comprises a door comprised of flexible material that can be extended to enclose the shelter or retracted to provide an opening into the shelter; wherein the door assembly does not rigidly connect to the outer frame assembly of the shelter during normal usage thereof. In addition, a shelter system comprising the outer frame assembly, the cover and a door frame comprising a plurality of intercoupled members and a retractable door arrangement is also provided.

Abstract: A portable shelter for providing cover over an area, wherein the shelter is coupleable to a structure, the portable shelter comprising a first base member and a second base member, each of which are coupleable to the structure; two subframe assemblies, each subframe assembly comprising a vertical support member having a first end and a second end, wherein the first end is coupleable to a respective base member, at least two arm members, each having a first end and a second end, wherein the first end of each respective arm member is pivotally coupled to the second end of vertical support member, at least two brace members, each having a first end and a second end, each respective first end being coupled to the vertical support member and each respective second end being pivotably coupled to a respective arm member, a first coupling arrangement for pivotably coupling the respective first end of each arm member to the second end of the vertical support member, a second coupling arrangement, slideably coupled to

Abstract: A door assembly for use in a shelter, wherein the shelter comprises an outer frame assembly comprising a plurality of intercoupled members forming a coverable structure and a cover for covering the outer frame assembly, wherein the door assembly comprises a door frame comprising a plurality of intercoupled members; and a retractable door arrangement coupled to the door frame, wherein the retractable door arrangement comprises a door comprised of flexible material that can be extended to enclose the shelter or retracted to provide an opening into the shelter; wherein the door assembly does not rigidly connect to the outer frame assembly of the shelter during normal usage thereof. In addition, a shelter system comprising the outer frame assembly, the cover and a door frame comprising a plurality of intercoupled members and a retractable door arrangement is also provided.

Abstract: A portable shelter for providing cover over an area, wherein the shelter is coupleable to a structure, the portable shelter comprising a first base member and a second base member, each of which are coupleable to the structure; two subframe assemblies, each subframe assembly comprising a vertical support member having a first end and a second end, wherein the first end is coupleable to a respective base member, at least two arm members, each having a first end and a second end, wherein the first end of each respective arm member is pivotally coupled to the second end of vertical support member, at least two brace members, each having a first end and a second end, each respective first end being coupled to the vertical support member and each respective second end being pivotably coupled to a respective arm member, a first coupling arrangement for pivotably coupling the respective first end of each arm member to the second end of the vertical support member, a second coupling arrangement, slideably coupled to

Abstract: The method includes providing a motor having a drive shaft mounting a pinion profile having an outside diameter and a mounting collar surrounding the shaft, the collar having an outside diameter less than the outside diameter of the gear. A gearbox wall formed with an opening having a generally ring-gear shape larger than the pinion and an inside diameter substantially the same as the outside diameter of the collar. The pinion is maneuvered through the opening and the collar is pressed into the motor-mounting opening. The invention is also the structure of the finished assembly including the opening.

Abstract: A fluid and/or gas treatment unit containing a dynamic rotating assembly for passage of a fluid and/or gas therethrough comprises a housing having a generally cylindrical body and end walls, and a generally cylindrical member rotatable in the chamber and having a peripheral wall and end surfaces. A shaft extends coaxially through coaxial apertures in the housing end walls, and through a coaxial passage in the rotatable member with which it is engaged to rotate as a unitary assembly. Adjacent the inner surface of each end wall of the housing are, seriatim, a resiliently deflectable biasing element, a generally circular wear plate and a resiliently compressible, generally circular sealing member between the wear plate and the cylindrical member and rotatable therewith. A generally circular bearing member extends about the generally circular sealing member and the cylindrical member and is rotatable therewith.

Abstract: A motorized shutter assembly includes a frame having a pair of parallel spaced frame members, louver slats extending between the frame members and having shafts extending into and pivotably seated in the frame members. A coupling is engaged with the louver slats to produce concurrent pivotal movement of the louver slats in either direction. An adapter on one of the frame members has a drive portion engaged with the end of a louver slat and is rotatable to effect pivotal movement of the slats in either direction. The adapter is engaged with a reversible drive motor assembly to effect rotation of said adapter and the adapter also desirably provides a clutch to protect the drive motor assembly.

Abstract: This power assembly has a housing with upper and lower housing portions and a frame of adjustable height in the housing. The housing mounts a worm gear in one of its portions, and the frame carries a worm on a fixed axis meshing with the worm gear. When the worm gear is changed for one of a different diameter, the frame carrying the worm may be raised or lowered to change the center distances so that the worm meshes with the new worm gear.

Abstract: This attachment assembly comprises a housing with channel-shaped walls with detents to snap over the valve housing. It also comprises an electrically powered rack and pinion drive which is fastened to the handle of the valve.

Abstract: For a baby stroller, an add-on assembly comprises a planar rectangular chassis pivotally attached to the stroller rear axle and carrying on its distal end a drive shaft with wheels. The chassis also mounts an electric motor having a spur gear engaging a ring gear in one of the wheels. At least one strut is connected at one end to the structure of the stroller well above the axle and at the other end to the rear of the chassis. The strut holds the chassis downward so that the drive wheels engage the pavement, supplanting the stroller rear wheels. Battery and controls for the motor are included.

Abstract: This sliding sash drive assembly includes a rack gear for the sash and a drive unit adapted to be mounted on the window frame and having a driven spur gear. An L-shaped engagement lever is mounted at its vertex on the housing and carries on its short leg a rack guide adapted to embrace the rack gear so that, as the long leg of the lever is moved, the guide moves the rack to a position at which the rack meshes with the spur.

Abstract: Feedback potentiometer-type servoactuator uses the ring gear of a planetary gear system to drive the wiper across a resistive arc of less than 360.degree. where the actuator has a travel of multiple turns. The ring gear is supported by spaced struts in the actuator housing.

Abstract: An anti-reversing mechanism for a reel comprises an overriding clutch within the drive gear of the reel, a sleeve rotatably mounted within the overriding clutch and a retainer for restricting axial movement of the sleeve to retain the sleeve within the clutch. A drive shaft is rotatably mounted in the reel and a locking member is mounted upon the periphery of and movable axially length of the drive shaft. The locking member and drive shaft include cooperating opposed flat surfaces for limiting rotation of the locking member relative to the drive shaft. The locking member and the sleeve have interengaging teeth to constrain the rotation of the locking member relative to the sleeve. In addition, there is a lever for moving the locking member axially along the drive shaft between a first position of disengagement with the sleeve and a second position of engagement with the sleeve.