Abstract: A pneumatically powered apparatus for removing staples from upholstered furniture and other surfaces is disclosed. The apparatus includes a pivoted staple pulling bit which has a chisel shaped end portion sized for insertion along a surface beneath a staple. A reciprocating plunger having a cam shaped end portion is in communication with the rear portion of the bit. Forward movement of the plunger forces the cam shaped end against the bit pivoting the chisel shaped end portion upward.

Abstract: The present invention is directed to muffler apparatus and a method for making same. The apparatus includes inlet and outlet tubes with a plurality of baffles extending from the inlet and outlet tubes to a housing. The outlet tube has a constricted portion near its inlet end formed with creases and lobes and a flare at the end. Such constriction increases the housing to outlet tube area ratio of the muffler which results in advantageous attenuation characteristics. The process for making the muffler is simpler than known methods since the outlet tube is formed and baffles pressed onto it in a single step.

Abstract: An integral formed fluted tube intended, for example, for use as a sound suppression device in mufflers, exhaust ejectors, etc. is disclosed. The tube is formed of a cylindrical portion with generally circular inlets and outlets and a constricted portion between those ends and within the constriction, a plurality of bypasses therethrough. The constriction may also include a frontal portion having a generally concave surface which rises to an apex and thereafter forms a plurality of convex rear portions toward the outlet end. Other embodiments are shown in the Figures. The device may be used integrally within a muffler to obtain a venturi effect for an exhaust ejector and sound suppressor.

Abstract: The specification discloses an improved clamp (20) for securing overlapping telescoped ends of adjacent tubes in an exhaust system, or the like, to form a substantially leakproof joint. The clamp (20) includes a circular band (26) and a bolt (32) having a curved end (34) secured thereto over a predetermined circumferential distance adjacent one end of the band, and a straight threaded end extending through an extension (40) secured adjacent to the opposite end of the band. A nut (44) is provided on the straight bolt end (38) for tightening against the extension (40) to draw the ends (28 and 30) of the band (26) together in near abutting relationship to engage the lap joint over a substantially continuous circumferential area in a second embodiment (60). The extension (62) can bridge the gap to serve as a guide for the other end of the band, or it can be an integral portion (72 and 74) of the band in a third embodiment (70).

Abstract: A straight-through flow muffler (10) is shown. A cylindrical housing (11) has an inlet (13a), an outlet (14a), and a pair of axially aligned, longitudinally spaced tubes (15, 16) extending from the inlet and outlet into the center of the muffler housing. Imperforate baffles (17, 18) separate the muffler housing into a plurality of attentuation chambers (20, 21, 22) surrounding the tubes (15, 16). A pair of sonic chokes (25, 26) are mounted in series in the tubes. The baffles and a pattern of perforations in the tubes cooperate to block flow between chambers except through the sonic chokes (25, 26) while permitting fluid communication between the tubes and the individual chambers.

Abstract: A muffler comprising a housing (12) having end caps (16, 18) and partitions (32, 38, 42) which divide it into first and second expansion chambers (40, 44), a flow chamber (36), and a resonator chamber (34). An inlet tube (20) passes through end cap (16) and partitions (38) and (32) to open into chamber (34): it has perforations (58) and (62) which afford communication with chambers (40) and (36) respectively. An outlet tube (24) passes through end cap (18) and partitions (42) and (32) to open into chamber (36): it has perforations (70) which afford communication with chamber (44), and includes anti-whistle beads (72). A conversion-divergent nozzle (80) is located in tube (22) at its end opening into chamber (36). Apertures (190) are provided to afford limited flow of gas through chamber (34) from tube (20) to chamber (36).

Abstract: A muffler (10) for reducing the noise level of gases passing therethrough is disclosed. The muffler (10) includes a housing (12) including a longitudinally extending wall (14) and a pair of opposite end walls (16, 18). Baffle plates (32, 38, 42) divide the interior space of the housing (12) into a Helmholtz resonator chamber (34), a flow chamber (36), an inlet broad band attenuator chamber (40) and an outlet broad band attenuator chamber (44). An inlet tube (20) extends through an inlet port (21) in the end wall (16), through a hole (48) in the baffle plate (38) and through a hole (50) in the baffle plate (32). An outlet tube (22) passes through an outlet port (23) in the end wall (18), through a hole (52) in the baffle plate (42) and through a hole (54) in the baffle plate (32). Exhaust gases enter the muffler (10 ) through the inlet tube (20), pass through holes (62) into the flow chamber (36) and exit the muffler (10) through the outlet tube (22).

Abstract: A saddle for a U-bolt clamp assembly is disclosed. The saddle is comprised of a single sheet metal member. The member is folded along a line to form a two-layer web portion and a pair of tubular portions. Each of the tubular portions receives a leg of a U-shaped bolt. Each tubular portion is formed of an inner layer of sheet metal which has substantially a 360.degree. circumferential extent and an outer layer bent around the inner layer and which extends around at least a 180.degree. circumferential extent. The outer layer thus serves to hold the saddle in a folded condition without the use of welds.

Abstract: An improved exhaust conduit lap joint construction is disclosed, wherein the outer tube includes an end portion having therein a plurality of captured take-up slots and a plurality of relief slots which extend through the end of the tube. An inner tube extends telescopically into the outer tube end portion so as to cover the slots from the inside. Clamping means, including means encircling the outer tube and covering the captured take-up slots, hold the two tubes together, whereby a leak proof lap joint is formed.

Abstract: Means and methods for prevention of undesirable acoustical whistles in mufflers or silencers of inexpensive and convenient design are shown. The broad inventive concept is that of preventing extended smooth flow of gas within a perforated tube, and this is taught by regular or random beading, by internal banding, or by provision of a screen structure for insertion within the tube.

Abstract: A method and apparatus for joining two tubular members in a strong, leak-proof fashion in which a band of ductile metal is passed around the adjacent ends of the members and circumferentially stressed beyond its elastic limit to conform intimately with the outer surfaces of the members throughout practically their entire circumstances. Several constructions for applying the circumferential forces are disclosed, and use is taught of a packing element to prevent paraxial or helical leakage.

Abstract: A method and apparatus for joining two tubular members in a strong, leak-proof fashion in which a band of ductile metal is passed around the adjacent ends of the members and circumferentially stressed beyond its elastic limit to conform intimately with the outer surfaces of the members throughout practically their entire circumstances. Several constructions for applying the circumferential forces are disclosed, and use is taught of a packing element to prevent paraxial or helical leakage.