Abstract: A hoseless sensor system for a refrigerant unit includes a plurality of hoseless sensors for sensing system parameters of the refrigerant unit, and a portable electronic device configured to receive the system parameters from the hoseless sensors and to calculate system conditions for the refrigerant based on the system parameters. The plurality of hoseless sensors includes a hoseless first pressure sensor and a hoseless second pressure sensor, and a hoseless first temperature sensor and a hoseless second temperature sensor. The temperature sensors are temperature sensor clamps. Each temperature sensor clamp includes a clamping portion configured to clamp on a tube of the refrigerant unit, the clamping portion including a sensor element to measure temperature about the tube. The clamping portion further includes a plurality of clamping teeth, and adjacent clamping teeth interlock in an overlapping configuration when the clamp closes inward beyond a threshold point.

Abstract: This collapsible sawhorse is comprised of two substantially identical side panels, a utility tray and links, and a top rail. The side panels, oriented back-to-back, are hinged together near their tops by laterally spaced mutually complementary structures thereon. The top rail fits with limited clearances over the hinging structures for maintaining them together and for distributing top rail loads to the underlying side panels. Loops underlying the top rail are snapped over hidden detent pins on the side panels for holding the top rail and side panels together. The utility tray is hinged to one side panel, and is aligned therewith with the sawhorse closed, and is extended transversely to both side panels and overlies the other side panel with the sawhorse opened; and the links connect the tray midpoint to the other side panel to limit side panel separation of the opened sawhorse.

Abstract: A trestle comprises two pairs of legs which can be opened and closed relative to one another. A beam has two depending poles and each pole is clamped by a clamping mechanism carried by an associated pair of legs. When the legs are open, the clamping mechanism is operative to hold the associated pole against movement relative to the associated legs whereas when the legs are moved together, this releases the clamping mechanism and allows the position of the pole to be adjusted.

Abstract: A portable, adjustable work trestle for use in the construction trades. The trestle is light weight and collapsible. The trestle comprises a foldable base structure with an elongated ladder-type configuration. The base structure has a predetermined height and includes four legs connected via step pads, board locks, board braces, and folding locks. A work surface board is disposed at the top or apex area of the trestle between the board locks. Four leg extensions are cooperatively and extensibly adjustably connected to the legs. The leg extensions enable the user to level and/or increase the height of the base structure. Optional second leg extensions may be added to further increase the height of the work surface provided by the trestle.

Abstract: The invention is a sawhorse that is quickly assembled and disassembled and is strong enough to support a heavy load. The sawhorse includes an elongated, horizontally disposed, rectilinear support member held above the ground by two spaced pairs of oppositely inclining leg members that overlap at a top end. Each leg member has a rectangular notch at the top end that is acutely angled to form a channel that receives the support member. A lower portion of the support member has two space rectangular channels for receiving the top ends of each pair of leg members. The leg members are pivotally coupled together with a pivot screw so that each leg member can be quickly rotated into a receiving position where the notches are aligned and able to receive the support member. Each leg member has the same dimensions and has a notch that is the same size and located at the same relative location making the sawhorse quick and inexpensive to fabricate.

Abstract: A collapsible sawhorse unit that, when unfolded and combined with a replaceable crosspiece, produces a sturdy and economical sawhorse. The unit includes the two A-shaped end pieces, of two legs each, that fold toward each other with the legs of each end piece folding toward each other. A folding upper longitudinal brace joins upper ends of the end pieces, and a pair of lower folding longitudinal braces joins the end pieces proximate a mid-point. Folding transverse braces of each end piece provide rigid separation of legs during use such that upper ends of the legs clamp against the replaceable crosspiece. Components of the folding unit are typically fabricated from standard metal stock. The resultant folding unit occupies a minimum volume, when folded, for convenient transport to a construction site.

Abstract: A sawbuck includes a pivot beam which forms the pivot joint between the legs of at least three X-shaped sets of legs, and also forms a horizontal member of two or more Vierendeel trusses included in the sawbuck. In a preferred embodiment, the sawbuck includes a rigid pivot beam and three foldable X-shaped sets of legs, each set of legs including at least one pair of legs pivotally attached to each other between ends of the legs by the pivot beam. First and second ones of the three sets of legs are pivotally attached to the pivot beam adjacent to respective ends of the pivot beam, and a third one of the sets is pivotally attached to the pivot beam between the first and second sets. A first primary stabilizer beam is attached adjacent to a first end of a first one of the legs of each pair of legs so that the pivot beam, first legs and first primary stabilizer beam define a first Vierendeel truss.

Abstract: A sawhorse has a pair of legs on each side of the longitudinal beam, and the two pair of legs are movable towards each other for folding the sawhorse. The hinge for allowing motion of the legs is made up of a bolt extending through the beam, with openings in each leg to receive an end of the bolt. The openings in the legs have one wall to limit the outward movement of the leg by engaging the bolt, and another wall to limit the inward movement of the leg. Nuts or other stops hold the legs on the bolts. A latching block may be fixed to the lower surface of the beam, between the legs. The block can be rotated to extend between the legs and prevent folding, or to extend along the beam and allow folding.

Abstract: A support element for an end of a board, intended for use in pairs to form a raised working platform or bench, comprises a first upwardly-facing support surface adapted to engage the underside of the board at its end, a second downwardly facing support surface parallel to and spaced vertically from the plane of the first supporting surface by a distance equal to the thickness of the board and spaced horizontally from the first supporting surface to engage the upper surface of the board a predetermined distance from its end, and at least one ground engaging surface so positioned that, in use, the support element engages the ground below the first supporting surface, the upwardly and downwardly facing support surfaces being provided by generally parallel channel-like bars laterally spaced from each other.

Abstract: A support element for an end of a board, intended for use in pairs to form a raised working platform or bench, comprises a first upwardly-facing support surface adapted to engage the underside of the board at its end, a second downwardly facing support surface parallel to and spaced vertically from the plane of the first supporting surface by a distance equal to the thickness of the board and spaced horizontally from the first supporting surface to engage the upper surface of the board a predetermined distance from its end, and at least one ground engaging surface so positioned that, in use, the support element engages the ground at a point directly below the first supporting surface, or a point spaced therefrom horizontally in the direction away from the second supporting surface.

Abstract: A compactly folding sawhorse including a main beam and a pair of legs double pivoted thereto at each end thereof, and an assembly for aligning and securing the legs in their extended position forming a very stable and durable work platform.

Abstract: A foldable saw horse which may be constructed of conventional wood two-by-fours, comprising a cross beam, a first pair of foldable legs at one end of the cross beam, and a second pair of foldable legs at the other end. Each pair of foldable legs include U-shaped brackets on each leg near the upper end connected by a hinge pin, for pivoting the legs between a spread apart working position and a side-by-side intermediate folded position. Each hinge pin in turn is connected at its inward facing end to a pivot plate pivotally mounted on a second hinge pin secured to the underside of the cross bar inset from each opposite end, each second hinge pin extending in a direction perpendicular to that of each first hinge pin. Thus, when the legs of each pair have been pivoted to the intermediate folded position on each first hinge pin, they may then be pivoted on each second hinge pin to the final folded position in side-by-side relationship to the cross beam.

Abstract: A sawhorse frame is provided for use with a separate work-supporting top member that may be disposable. The frame is made with the paired legs at each end hinged together near their tops, and with pincer-like clamping jaws formed near the hinge points so that the work-supporting top member is very forcefully clamped in place. Force for this clamping is derived from the force with which the feet of the sawhorse are pressed against the floor, acting through a large mechanical advantage that arises from the foot-to-hinge distance's greatly exceeding the clamping-jaw-to-hinge distance. When the sawhorse frame is not in use, the same hinge arrangement facilitates folding the bottoms of the legs together to a more compact configuration for storage.

Abstract: A sawhorse utilizing no nails or other fasteners comprising an elongate, generally circular member having a comparatively thick sidewall, but being otherwise hollow. The generally circular member is made of resilient material, having a spring-like quality, and the sidewall of the member is longitudinally cut for its entire length in a direction essentially parallel to the centerline of the generally circular member. Also, a pair of leg-receiving holes are cut through the generally circular member at a location substantially opposite from the longitudinal cut, with such holes being circumferentially spaced apart, and each being substantially equidistant from the ends of the circular member. Each of these holes is arranged to receive the upper end of an elongate leg member.

Abstract: Collapsible traffic barricade is described, having a reflective panel mounted on a pair of leg supports which have vertical portions to receive the reflective panel but are angled outwardly so as to provide greater lateral stability. The supports may also be provided with additional mountings capable of receiving additional reflective panels.

Abstract: A trestle leg assembly comprising a foldable pair of legs which may be opened out and locked into A-frame configuration. Angles are bolted to horizontal plates welded to the tops of the legs, and the bolt holes are located so that when the upright legs of the angles are positioned back to back, they clamp the sides of a standard 2.times.4, and when they are placed face to face they grip the edges of a 2.times.4 lying flat.

Abstract: A collapsible sawhorse is provided with a beam and a pair of leg assemblies adapted to support the beam and to be collapsible to a stored position adjacent a surface of the beam. A doglike structure at one end of each of the leg members is adapted to be positionable within a locking hole depending from the underside of the beam.

Abstract: A portable, lightweight, board-gripping support for a conventional board includes four rectangular, tubular pieces. The four pieces are configured and connected to form generally an A-shape in a single plane. Bar members form the upper and lower cross members of the A-shaped support. Opposing surfaces of the bar members are substantially planar, oriented orthogonal to the plane of the A-shaped support, and spaced apart by a distance greater than the thickness of the board such that the support forms an obtuse angle .beta. with the board when the edges of the opposing surfaces of the bar members contact the board. The angle .beta. is between 102.degree. and 140.degree.. When the board spans a pair of supports, and a downward loading force is applied to the board, the edges of the bar members create indentations in the board which resist relative sliding movement between the board and the support.

Abstract: A portable scaffolding comprising a plank with frame members supporting each end thereof. The frame members include legs of steel angles which are interconnected at their lower portions by toggle arms for collapsing, and at their upper ends by threaded members for adjusting the spacing thereof. Inwardly facing channel members on the upper ends of the legs are received over the opposite edges of the plank.Another pair of channel members adapted to be received over the edges of the plank are also drawn together by threaded members, and depending from one of them is a step to facilitate stepping up onto the scaffold.

Abstract: A portable, collapsible hoisting and supporting apparatus is described comprising an arched cross member and two triangularly-shaped end supporting assemblies for supporting the ends of the arched cross member, means for attaching hoisting tackle to the arched cross member and a windlass or the like to one of the end assemblies, and means for folding the arched cross member and the end assemblies for reducing the overall size of the apparatus for transportation and storage.

Abstract: A pair of support leg means each comprising a pair of identical support members are secured together by individual bolts to engage a dependent web of the top member of the saw horse. Each support member has a tapered flat abutting surface thereon and an adjacent tapered flat clamping surface formed on offset inner lateral marginal portions thereof which are at the upper end portions of the support members when operatively positioned. The abutting surfaces are at a first acute angle to the longitudinal axis of the support member and the clamping surfaces are at an acute angle several degrees less than the abutting surfaces to facilitate obtaining a good clamping action by the support members onto the web members when the pairs of support leg means are operatively positioned.

Abstract: The specification discloses a bracket assembly for supporting a pair of legs on either side of a beam to form a collapsible sawhorse, barricade, or the like in which the legs can be pivoted between folded and upright positions. The assembly includes a beam support bracket, for supporting a beam, and a pair of leg support brackets each pivotally interconnected to one side of the beam support bracket by a swivel bracket. Means are included for positioning each swivel and leg bracket unit in an upright position, for restraining outward flexing of said swivel brackets in the upright position, and for preventing pivotal movement of said swivel and leg bracket units out of the upright position when the leg brackets engage the beam support bracket.

Abstract: An easy to assemble and disassemble doublewedging sawhorse including a horizontal beam supported by pairs of vertical legs, each pair of legs being separated by a slotted shelf mounted in slots in the legs and wedged therebetween, each pair of legs being connected by a tie rod at a point above the shelf and below the beam, having oppositely tapered angular grooves therein such that the tapered edges and the grooves meet and provide a wedging action which increased the pressure of the legs against the beam as the beam is forced further downwardly.