1. In a rocket motor exhaust nozzle the combination of A nozzle body defining a venturi throat, An insert wear ring to protect the venturi throat of the nozzle body, A fixed annular mounting base removably receiving the nozzle body, A flexible seal membrane effecting a sealed relationship between the mounting base and the nozzle body, and allowing controlled relative movement therebetween, A concentric ring operatively mounted by said seal membrane between the nozzle body and the mounting base, ...

A moveable headrest is equipped with a lower headrest frame shaft fixedly connected to a headrest stay detachably connected to the upper end of the seat back, and a pair of ratchet bases rotatably supported on respective shaft ends of the lower frame shaft. The ratchet bases are coupled with each other at their upper ends through a moveable upper headrest frame. A ratchet-and-pawl mechanism is attached to at least one of the base members for selectively engaging the upper frame with the lower fr...

A moveable toy (10) consisting of a base (12) and a motorized vehicle (14). The base includes a track (46) having a central groove (50) ending in openings (54) at either end. The track includes teeth (48) which cooperate with a drive gear (44) held in the vehicle to drive the vehicle along the track. Rotors (56) having notches (58) on the top surface are rotatably held in openings at each end of the central groove in the track. Upon actuation, the vehicle travels along the track until it arrives...

A moveable closet for storing articles in an aircraft includes a fixed outer housing and a moveable inner housing capable of being displaced from a loading position for articles to be placed within a storage compartment to a stowed position, which allows for additional cabin space during taxiing and flight. The storage compartment defined by the inner housing may be further sub-divided by shelves for storing articles of various sizes and may also be fitted with bars in order to accommodate hangi...

A moveable highway barrier includes a hinged shell and a stationary barrier section. The stationary barrier section contains a mechanism for raising the hinged shell between a standard position (also known as the lowered or closed position) and an open position (also known as the raised position). When the hinged shell is in the open position, vehicles, such as emergency vehicles, can traverse through the opening. The hinged shell can overlap a neighboring fixed barrier to provide lateral suppor...

An X-ray table supported above a base for use with a C-arm X-ray machine, including an X-ray permeable table surface. The table also includes at least two support members for supporting the table above the base with at least two support members and the base forming a substantially unobstructed middle area, a first one of at least two support members pivotally connected to the base, a second one of at least two support members being fixedly connected to the base, and an actuator for moving the ta...

An improved seal (10) for use in a universal joint (11) having an elastic seal ring (23) compressed between a pair of right circularly cylindrical sleeves (24,25). The seal ring is bonded to the sleeves. The sleeves are adapted to have press-fitted relationship with association portions of the universal joint, such as the journal trunnion (12) and the bearing retainer (14). In one form, the elongated extent of the sleeves is parallel to the axis (15) of the journal trunnion (12) and in a modifie...

A hospital stretcher, including a chassis frame mounted on wheels, and a stretcher frame carried upon the wheeled chassis frame, transverse extending rails across a top of the chassis frames so that a ball bearing suspension mounted on an underside of the stretcher frame, allows the stretcher frame to be sidewardly moved a part way upon a bed so as to more easily permit transfer of a patient therebetween.

A holder for document holding packets, board or the like provided with mobile indexes for scheduling, checking of due dates, statistical data and similar material which includes a band-like element sub-divided into a bottom strip portion for supporting the document holding packet and a top strip portion, slightly inclined to the bottom strip portion and provided with a first elongated guide having markers slidable therewithin, and a second elongated guide with a slidable cursor therein, this gui...

A machine for heat sealing two sheets of material together, provided with a pair of cooperating heat wheels forming a sealing nip zone, a support for a sheet of material and supports for strips of sealing tape to be utilized in the sealing operation, together with an edge guide assembly to guide another sheet of material into proper position for joining to a sheet of material carried by the machine.