US2382797A

US2382797A - Bilge pump

Info

Publication number: US2382797A
Application number: US562654A
Authority: US
Inventors: Langan Thomas
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-11-09
Filing date: 1944-11-09
Publication date: 1945-08-14
Anticipated expiration: 1962-08-14

Description

T. LANGAN Aug. 14, 1945.

BILGE PUMP Filed Nov. 9, 1944 2 Sheets-Sheet 1 ZlvWQ/MM Thomas L an gan Aug. 14, 1945. LANGAN 2,382,797

BILGE PUMP Filed Nov. 9} 1944 2 Sheets-Sheet 2 46a i 46b 3 r won kw Thomas Lanyan Patented Aug. 14;

* ummi AppllcationiNovember e, 1e44, Serial n 'ssacsi a A column. (01.105150) This invention relates to deformable chamber pumps and, more particularly, to pumps of the diaphragm type. j

The primary object of the invention isto pro-' vide a manually operable pump capable of ham dling large volumes of water where speed, siniplicity in operation, compactness and ruggedness are of the essence. These requirements seem to congregate in the bilges of boats wherein all too frequently the bilgewater is not noticed until it has become a demonstrated hazard. Y

, To meet the above requirements, it is intended to provide a'pump having a low intake and delivery vtube-like box,- having intake and exhaust flap valves spaced therealong and operating in the same direction, .a relatively large chamber having'a large diaphragm, and a relatively small diameter conduit connecting thev chamber and the portion of the box between the valves whereby, when the diaphragm is lifted upwardly to expand the chamber, the exhaust valve is pulled closed and water is driven under atmospheric pressure through the intake valve and when the diaphragm is driven down to compress the chamber, the intake valve is closed and the water is driven out through the outlet valve.

A more specific object is the provision of a conduit connecting the intake and delivery box, the conduit being of substantially smaller crosssections than the diaphragm, thereby making for a short easy stroke without sucking air from the intake as the bilgewater recedes towards the level of the intake opening. With this particular relationship, there is provided a diaphragm of flexible, preferably resilient, material such as rubber, a reinforced stiff central portion overlying the upper end of the conduit, and a driving arm connected to the central portion so that the flexible portion will follow the stifi central portion.

Yet another object is the provision of an expansible chamber pump having a conduit connecting the chamber downwardly to a horizontal inlet and delivery box, and a flap-type inlet valve disposed substantially below the lower end of the conduit where it will be driven closed by the first downwardly surging water of the compression stroke, thereby utilizing substantially the entire surge of the compression stroke as a delivery force.

These and other objects will be apparent from the following specifications and drawings, in which:

Fig. 1 is a vertical section through the pum and:

Fig.-

an elevation as seen from the. outlet end of the assembly.

Referring now to the drawings, in which like reference numbers denote the same or similar elements, 2 denotes a rectangular, elongated, hol- -low box, preferably formed of sheet metal, and having open inlet and

outlet ends

4 and 8. Annularly apertured plates 8 are secured at the box ends for mounting threaded pipe fittings III for threaded engagement with the inlet and discharge pipes, which may be arranged to suit the needs of the particular problem. When the pump is usedin the bilge of the boat, box 2 should be disposed at or near the lowermost portion of the bilge and the discharge pipe should lead outwardly of the boat above thewater line.

Valve-seats i2, comprising annularly apertured, rectangular plates of the same width as the box 2 but somewhat longer than theheight thereof, are welded as at It so as to be inclined in the same direction. It should be noted that one of the valve-seats I6 is disposed below the lower end of conduit 32, at least with regard to its lower end, for reasons specified below. Inlet and outlet valves l6 and i8 comprising rubber discs 20 are'bolted as at 22 to the upper faces of the valve-seats to comprise flap valves. Discs 24 are riveted to the upper faces of the valves for loading and reinforcing the latter. 30 Box 2 is provided with an opening through the top wall in the region between valves, the open-. ing being framed by an internally threaded-fitting amxed to the top of the box for engagement with the lower end of a vertical conduit 32 thread- 35 ed thereto as at 34. Conduit 32, which may be of considerable length, is threaded at 36 to a fitting 38 framing opening 40 which extends through the bottom of shell 42 which defines a chamber 44.

40 The chamber is provided with a, top 48, the top and shell having cooperating flanges 48 bolted together as at I50 for clamping therebetween the edges of a flexibly resilient rubber diaphragm 52, which diaphragm extends across the chamher. A reinforcing ring 54 is aiilxed as by bolts 58 on the lower face of the diaphragm so as to overlie the upper end of conduit 40 and to engage shell 42 when the diaphragm is driven to its lowermost position. Bolts 58 extend through the so diaphragm and on .the upper side thereof are engaged with an upper plate assembly 58, which includes a pairof spaced, upstanding lugs 60. having slots therethrough for the reception of cross bolt 86.

g Diaphragm i2 is driven through the cross bolt slots 62 formedin-the free endofacrankarm- I, the latter being pivoted by pin it to the top of it at the edge thereof. Crank arm 00 is furthe: provided with a slot II for receiving removable handle I! by which the crank arm may be rocked for vertically reciprocating the diaphragm.

As seen best in Fig. 2, top I is comprised of two spaced sections a and b. the sections being spaced to provide a well 14, the sides of the well being defined by side plates." secured to the top sections and having their lower edges arched as at II to conform to the contour of the top sections and to provide clearance for the diaphragm. Bearing plates II are secured to plates ll adjacent to pivot pin ll.

In operation, handle I! is pulled back to rock crank arm as about pivot pin ll, thereby lifting diaphragm 44 to operate the pump. Vertical movement of the diaphragm is obtained even though the free end or crank arm ll partakes of an arcuate course because of lost motion slots 02. As the diaphragm is raised, inlet valve is opened by bilge water under atmospheric pressure and outlet valve is remains closed. When handle 12 is returned, diaphragm II is driven downwardly to compress or decrease the size of chamber 44 and the intake water surges against the upper surface of intake valve it to drive the latter shut, simultaneously opening outlet valve is and. in turn, driving the bilge-water out through the discharge pipe.

The cross sectional dimension of conduit 3! with respect to thearea of flexible diaphragm 82 makes for a relatively easy stroke and avoids the tendency for the pump to suck air. It will be seen that most of the elements may be formed of sheet metal or stock pipes and fittings, and that its maintenance and cleaning are reduced to the minimum.

The invention, having been detailed above, is not to be limited by the specific showing but only in accordance with the scope of the following claims.

I claim:

l.lnapumpofthetypedescribed,passag means forming an elongated substantially horizontal passage having inlet and outlet openings at opposite ends thereof. respectively, one-way valves operating in the same direction spaced along said passage, means defining a chamber above said passage. a diaphragm extending substantially horlsontally across said chamber, means for reciprocating said diaphragm vertically whereby to expand and contract said chamher, and a substantially vertical conduit downwardly connecting the lower portion of said chamber and the portion of said passage between said valves. said conduit having a horizontal crosssection substantially smaller in area than the area of said diaphragm, said means defining the chamber comprising a rigid shell having upper and lower portions with the edges of the diaphragm clamped therebetween, said diaphragm being of flexible elastic material, a rigid reinforcing element disposed centrally of said diaphragm, said reinforcing element comprising a. ring on the lower side of the diaphragm ofla radial extent greater than the upper end of the conduit and overlying the latter. plate means on the upper side of the diaphragm overlying the ring and secured to the latter, upstanding lugs on the plate means, the means for reciprocating said diaphragm comprising a crank arm. lost motion slots disposed generally horizontally at one end of said crank arm, pivot means extending through said slots and said upstanding lugs, means pivotally connecting the other end of said crank arm to the edge of said shell, and a handle for rocking said crank arm.

2. The combination claimed in claim 1, wherein the upper portion of the rigid shell forming the chamber is provided with a well into which the handle for rocking said crank arm is adapted to be housed when in inoperative position.

THOMAS LANGAN.