Abstract: A gravity supplied irrigator for colon cleansing has an open ended nozzle with the inner end tapered to accommodate a removable rounded nose obturator extending from the inner end with the body of the round nose obturator bearing against the inner surface of the inner end. A gravity actuated fluid supply to the irrigator is provided by a conduit leading into the nozzle intermediate of its ends and the obturator is removable through the nozzle in order for the fluid supply to enter the irrigator. The conduit supply is preferably offset in relation to the longitudinal axis of the nozzle to provide a swirling action to the entering fluid. The nozzle has an outwardly extending circumferential flange intermediate of the inner end and the conduit, which flange limits the insertion of the irrigator. A conduit attached to the other end of the nozzle has variable control means thereon to control the pressure of fluid in the nozzle and its rate of discharge from said nozzle.

Abstract: In combination, a support belt and a buckle having a frame with a pair of opposed forward and rearward transverse members, the latter being secured to one end of the belt. The other end of the belt is adapted to pass through the frame and has means thereon for engagement with the outside of the belt after such passage. The frame has a slidably, rotatable tubular member movable towards and away from the forward transverse member and the tubular member has a pair of opposed planar faces joined by a pair of opposed curved faces, said faces providing a pair of opposed, relatively sharp edges.

Abstract: A vacuum head for cleaning underwater surfaces has a depending skirt; the head, on its underside, has a brush depending therefrom with means on the underside to support the brush, which means is spaced inward of the skirt and is provided with apertures located between the brush and the head.

Abstract: Control devices for heating installations are disclosed, which heating installations are provided with thermostat controls. The control devices sense the temperature of the heating medium, e.g., water, to be passed to the heating installation and to be returned therefrom. The temperature difference actuates a control for mixing or directing the flow of the medium in the desired volumes. Use is made of control pistons and expansion material to provide control devices which are particularly capable of optimum energy utilization.

Abstract: A safety valve has a housing with an inlet, outlet and a threaded opening carrying a walled unit which is sealingly removable from the housing; the portion of the unit extending into the housing is apertured to permit flow and has a valve seat and co-operating plate to which is attached a valve stem extending through an annular diaphragm in secured relationship. The diaphragm is supported by the housing and in the portion of the unit exterior of the housing is a biasing device which acts on the diaphragm.

Abstract: An adjustment control for a thermostatic valve consists of a non-rotatable component to the valve on which is mounted a rotatable knob for setting the temperature control, the knob having a maximum rotation of about one revolution. A releasable auxiliary device is provided which is operable between the component and the knob at a predetermined intermediate rotational position of the knob to limit the rotation of the latter.

Abstract: A differential pressure relief valve formed of a housing having first and second chambers sealed from the atmosphere and separated by an annular diaphragm with the chambers and the annulus of the diaphragm traversed by a moveable sleeve. The first chamber communicates to a primary pressure source through a first channel in the housing and the second chamber communicates to a secondary pressure source through holes provided in the sleeve and then to a second channel in the housing. The end of the sleeve protruding from the second chamber is engageable with a seat in the housing. The arrangement is such that when the primary pressure exceeds the secondary pressure by a predetermined amount, the end of the sleeve protruding from the second chamber engages the seat but if the primary pressure does not exceed the secondary pressure by the predetermined amount, the end of the sleeve does not engage the seat, and fluid escapes from the source through the second channel and communicating sleeve, past the seat.

Abstract: A balanced valve disc and seat structure has a hollow valve disc engageable with the seat and pressure responsive means supported in the disc; the pressure responsive means divides the hollow valve disc into separate first and second chambers with a first aperture in the disc communicating with the first chamber and a second aperture in the disc communicating with the second chamber. A plunger has one end secured to the pressure responsive means with the other end of the plunger extending through the second chamber and the valve seat with means engaging the other end of the plunger when the first chamber has a higher pressure than the second chamber.

Abstract: A thermostatic valve for controlling flow comprises a housing formed of first and second parts providing a first chamber in which is located a valve seat and co-operating valve plate operable by a thermostatic element. The housing has an inlet and an outlet for the first chamber and, exterior of the latter, is a second chamber also formed by the two parts which provides a vent valve seat, the second chamber being intermediate of the inlet and outlet to the housing. The second chamber has a closing float element engageable with the vent valve seat to prevent air from disturbing the flow of the coolant over the thermostatic element.

Abstract: A first and second check valve operated independently in a conduit section and having first and second valve stems on a common axis with first and second valve seats and cooperating normally disposed valve plates with the valve stems inclined away from the direction of flow, the second valve seat being larger than the first valve seat and the lowermost level of the second valve seat is at least below the lowermost level of the lift of the first valve plate with a single removable cover on the conduit section for securing the check valve in position.

Abstract: A thermostatic valve has a working element, a valve seat and a guide member for the working element below the valve seat; the guide member is connected to the valve seat through a plurality of holding arms, each supported by a yoke arm connected above the valve seat. The guide member has a plurality of slots on its underside and each of the holding arms at its free end has an inwardly extending claw engageable with one of the slots to secure the guide member to the valve.

Abstract: Massage apparatus for treatment of deep muscle in body tissue has a galvanic skin reactor having electrodes adapted to be attached to the skin combined with a massage device having massage elements with an amplitude of between 1/2 to 1" operating at a frequency of about 22 cycles per second, said galvanic reactor having response mechanism to indicate the change in resistance between the electrodes and enclosed skin caused by application of the massage elements.

Abstract: A massage device has a rocking member, a synchronous electric motor drive, an elastomeric pivot, a drive connecting member, a rigid structure supporting said pivot and massage elements on the rocking member which move in opposite direction during the rocking motion. Gripping means are secured to the rigid structure, at a location of minimum motion of the rigid structure to minimize the vibration transmitted to the operator; preferably the gripping means are resiliently secured to the rigid structure. The device is weighted so that the moment of force about the elastomeric pivot is sufficient to cause slowing of the motor when the massage members act on the body and increased pressure on the gripping means lowers the frequency of the massage elements. A weight, adjustable in position with respect to the elastomeric pivot, is located on the rigid structure in opposed relation to the drive connecting member; movement of the weight causes change in the amplitude of the massage elements.

Abstract: A differential pressure overflow valve has a housing with a differential pressure indicator therein consisting of a cylinder containing a piston moving against the force of a spring; the piston is spaced from said cylinder to provide an annular gap. The housing also has an inlet and an outlet pressure chamber; the inlet pressure chamber is connected by a passage to one end of the cylinder and the outlet chamber by another passage to the other end of the cylinder. To provide a choke effect the cross sectional area of the annular gap is substantially smaller than the cross sectional area of the connecting passages.

Abstract: A radiator valve has a housing carrying a valve stem with plate and loading spring on the valve stem above the valve plate; a first seal bears against the valve stem between the valve plate and the spring. A presetting member is located in the housing and it carries a second seal bearing against the valve stem at a position removed from the valve plate with respect to the first seal.

Abstract: A reverse flushing device has a housing with an inlet, an outlet and a first filter to receive the flow therebetween with means in the housing to divert flow through the first filter. A second filter, positioned upstream of the first filter, has an internal apertured housing with a movable apertured slide operable thereon to provide a closure to the second filter during flow through the first filter. The housing has a discharge aperture with a movable shut off element. The diverting means and tubular slide are responsive to opening of the shut off element whereby the former diverts flow through the first filter and the tubular slide aligns with the second filter housing to permit flow therethrough and into the tubular slide extension to reverse flush the particles on the first filter into the discharge aperture.

Abstract: A thermostatic radiator valve has a spring loaded thermostat located in a rotatable member with the spring bearing against the thermostat and the rotatable member, the latter having arms surrounding the thermostat, the free end of each arm having a radially inwardly projecting extension which bears against the loading spring.

Abstract: A control unit is formed of a housing containing a filter with an inlet and outlet in line above the filter, the latter forming a channel with the housing; a pressure reducer is positioned between the inlet and the outlet above the filter. A rotary valve positioned between the filter and the pressure reducer reverses the flow in the unit. A plug-valve is located in the housing to provide drainage and the plug-valve is connected to the rotary valve so that on reversal of flow, the plug-valve opens to drain the unit.

Abstract: A valve seat and/or co-operating disc has an indented or zigzag perimeter. The disc is integral with the valve body and surrounds a body aperture through which a sealed valve stem reciprocates.