US2894515A - Pipe pick and tamper - Google Patents

Description

July 14, 1959 E. F. WISMER, JR

PIPE PICK AND TAMPER Filed Aug. 11, 1955 INVENTOR ATTORNEYS United Sates. Patent PIPE PICK AND TAMPER Eli F. Wismer, Jr., Havertown, Pa. Application August 11, 1955, Serial No. 527,836 3 Claims. (Cl. 131-243) The'present invention relates to pipe picks and tampers, and more particularly to'such structures which are combined in aunitary construction soas to be readily available when' needed.

The primary object ofthe invention is to provide a pipe pick and tamper whereinthe pipe pick and tamper maybe operated with a: single operating plunger with means to selectively project the pick or tamper as desired.

Another object of theinvention is to provide a structure of the class described in which the pick and/or tamper may be springretracted to stored position.

A furtherobjectof the invention is to provide a combined pick and tamper inwhich the pick or the tamper may beselectively locked in operating position by a singleoperator. 1

Other objects and advantages will: become apparent in thefollowing specification when considered in light of the attached drawings, 1 in which:

Figure 1 is a perspective view of one form of the invention; v

Figure 2 is afragmentary side elevation of the invention shown'partly broken-away for clarity and omitting the operatingspring;

Figure 3 is a side elevation of the invention with the pick in extended locked position;

Figure 4 is a view-similar to Figure 3, showing the tamper is extended locked position;

Figure 5 is an enlarged'exploded viewofthe elements comprising the combined pick and tamper;

Figure6isa transverse'cross section takerralong the line 6--6 of Figure 3';

Figure 7 is a transverse cross section taken along the line "77 of Figure 4;

.Figure 8 is a transverse cross section taken along the line-8--8'of Figure 3, and

Figure an a transverse cross section taken along the line 9-9 of Figure'4:

Referringnow to the drawings indetail wherein like reference numerals indicate like parts'throughout the several figures; the reference numeral ltl in'dicates generally a combined pipe pick and tamper illustrated as attached to a lighter 11, which is illustrated as having a cover 12, a thumb wheel 13, a flint wheel 14, wick 15, all of a conventional construction. The combined pipe pick and tamper 10 includes a housing 16 which is illustrated in Figure 1 as being formed integrally with a lighter 11 but which may be attached by any suitable means.

In Figures 2 through 9, the housing 16 has been shown as a cylinder 16a separate from the lighter 11. For purposes of the invention, however, the housing 16 and cylinder 16a are identical.

The cylinder 16a is provided with an inner end wall 17 and is open at its opposite end 18. The inner end wall 17 has an open axial bore sector 19 extending therethrough and a substantially larger open axial bore sector 20, also extending therethrough and in communication with the bore sector 19. The wall 21 of the cylinder 16a is provided with a longitudinally extending slot 22 which begins adjacent the open end 18 of the cylinder 16a and terminates at a point spaced from the inner end wall 17. A short circumferential slot 23 extends from the base 24 of the slot 22 to provide an oltset adjacent/the inner end of the slot 22.

A second cylindrical member 25 having an external size slightly smaller than the internal size of the cylinder 16a is mounted for reciprocation within the cylinder 16a. Cylinder 25 is provided with a closed outer end wall 26 and'an inner end wall 27. The end wall 27 is provided with an open axial bore sector 28 and with a somewhat larger open axial bore sector 29, also extending therethrough and in communication with the axial bore sector 28. The aperture formed by the bore sectors 28 and 2-9 is identical in shape and size with the apertures formed by the'sect'ors 19 and 20. A coil spring 30 is positioned within the cylinder 16a and extends between the inner face of the inner end wall 17 and the confronting face of theend wall 27 tonormally bias the cylinder 25 out of the cylinder 16a. Cylinder 25 is provided adjacent the end wall 27 with a threaded bore 31 in which is mounted a stop screw 32. Stop screw 32 projects radially outwardly from the cylinder 25 into the slot 22 so as to secure the cylinder 25 in the cylinder 16a, while at the same time permitting reciprocal movement therebetween.

A pick-shaft 33 is mounted on the end wall 26 at 34 by any suitable means, such as welding or the like, and extends completely through'thecylinder 25 through the sectors 28 and 29, and projects beyond the end wall 27 asubstantial distance terminating in a sharpened pipe pickingpoint' 35. The end wall 27 is provided with a screw-threaded bore 36 adjacent one edge ofthe sec tor 29 and a stop'screw 37 is adapted to be screwed therein so as to project therefrom for a purpose to be later described.

A cylindrical pipe tamper head 38 is' provided with a sector: shape shaft 39 extending axially therefrom and with a second somewhat larger sector shaped second cylindrical shaft 40 formed integrally with the shaft 39"as'shown inFig. 6. A central longitudinal bore 41 extends through the shaft 39 and through the tamper 3'8 and has a diameter slightly larger than the diameter of the pipe pick shaft 33. Shaft 40, formed integrally with the shaft 39', is slotted transversely of the longitudinal axis thereof at- 42 adjacent the outer end '43; with the slot 42' extending completely through the shaft 40 to the shaft 39. At its opposite-end, the shaft 40 termi nates at apoint 44 spaced fromthe cylindrical pipe tamper 38 *a-distance equal to the width of the slot 42 forminga second slot 45.

Thepick 33extends through'the bore 41 and the shafts 39 and 40 are adapted to extend through the sectors 19, 20-=and 28,29." The bor'e'sector' 20'extending through the inner end wall 17 is: slightly less than h'alf a complete circle, and the bore sector 29 is likewise somewhat less than half a complete circle, with the bore sectors 20 and 29 being positioned diametrically opposite each other approximately apart about the axial center of the cylinders 16a and 25. The stop screw 32 may be engaged in the slot 22 to prevent general rotation between the cylinders 16a and 25, and the circumferential slot 23 is sufficiently short to limit the degree of rotation of the cylinder 25 with relation to the cylinder 16a such that the sectors 20 and 29 cannot be aligned.

The bore sector 20 normally encompasses the shaft 40 so as to prevent relative rotation between the pipe tamper 38 and the cylinder 16a. However, when the cylinder 16a and the pipe tamper 38 are positioned so that the pipe tamper 38 is in engagement with the inner end wall 17 of the cylinder 16a, the slot 45 becomes aligned with the inner end wall 17 so that rotation of the tamper 38 may occur with relation to the cylinder 16a.

The outer end 43 of the shaft 39 extends through the bore sector 28 and the end wall 27 of the cylinder 25, and is adapted to be positioned so that the shaft 40 is received in the bore sector 29 in such a way that relative reciprocation may occur between the cylinder 25 and the shaft 39. With the slot 4-2 positioned for engagement with the end wall 27, rotation of the pipe tamper 38 will cause the end wall 27 to engage in the slot 42 lock ing the shaft 39 to the cylinder 25 for axial movement therewith.

The stop screw 37 is adapted to engage the flat faces of the shaft 40 to limit the rotational movement thereof with respect to the cylinder 25. Rotation of the shaft 39 in a direction reverse to that which locked the shaft 39 to the cylinder 25 will align the shaft 40 with the bore sector 29 and simultaneously engage the slot 45 with the inner end wall 17 to lock the shaft 39 to the cylinder 16a.

In the use and operation of the invention, when it is desired to operate the device as a pipe pick, the shaft 40 is aligned with the bore sector 29 by rotating the pipe tamper 38. The rotation of the pipe tamper 38 simultaneously releases the shaft 39 from the cylinder 25 and locks it to the cylinder 16a. The outer end 26 of the cylinder 25 may then be pressed with the finger and the pipe pick 33 will become exposed, as shown in Figure 3.

Rotation of the cylinder 25 with relation to the cylinder 16a will cause the stop screw 32 to engage in the slot 23 to lock the cylinder 25 in position in the cylinder 16a with the pipe pick projecting. After the pipe has been cleaned with the pipe pick 33, the cylinder 25 is rotated with respect to cylinder 16a to release the stop screw 32 from the slot 23 so that the spring 30 can force the cylinder 25 to its outermost position with the stop screw 32 in engagement with the outermost end of the slot 22.

When it is desired to use the pipe tamper portion of the invention, the pipe tamper 38 is revolved in a direction reverse to that mentioned above and the slot 42 becomes locked to the end wall 27 while the slot 45 is released from the inner end wall 17. Pressure of the finger on end wall 26 will then cause the cylinder 25 to move in the cylinder 16a with the pipe tamper 38 being moved outwardly away from the cylinder 16a as in Fig. 4. Upon completion of the movement of the cylinder 25 within the cylinder 16a, cylinder 25 may be rotated slightly to cause the stop screw 32 to seat in the slot 23 to lock the pipe tamper 38 in extended position. Reverse rotation of the cylinder 25 will release the stop screw. 32 from the slot 23 to permit the shaft 39 to be retracted within the cylinder 16a.

Having thus described the preferred form of the invention, it should be understood that numerous modifications and structural adaptations may be resorted to without departing from the scope of the appended claims.

What is claimed is:

1. A hand operated implement comprising a hollow cylindrical housing with another end thereof open, an

inner end wall fixed to the end of said housing opposite said open end, a hollow plunger adapted to be telescoped through the open end of said housing into said housing end arranged for reciprocation into and out of said housing, said plunger having opposed inner and outer end walls, a coil spring in said housing normally biasing said plunger in a direction out of said housing, the inner end wall of said housing and of said plunger each having identically shaped openings therein with said openings each comprising a first axial bore sector and a second axial bore sector communicating therewith with said second axial bore sector having a diameter substantially greater than said first bore sector, means securing said plunger to said housing for sliding movement relative thereto with said openings in said inner end wall of said housing and said plunger having the respective second axial bore sectors thereof displaced circumferentially substantially an elongated member having a transverse crosssection of a shape the same as said openings and sufficiently smaller to permit free movement of said member through said openings, a cylindrical head fixed to one end of said elongated member said member having a transverse slot formed between said head and said one end thereof and a second slot formed adjacent the opposite end thereof for selective engagement with the respective end walls of said housing and said plunger upon rotation of said member releasably locking said member selectively to said housing and to said plunger, said member having an axial bore formed therein, and an elongated rod mounted on said plunger and slidably movable in the bore in said member whereby said rod may be projected from said member by moving said plunger inwardly of said housing with said member locked to said housing and when locked to said plunger said member and said rod being simultaneously projected from said housing on moving said plunger inwardly of said housing.

2. A device as claimed in claim 1 wherein said member is releasably locked to said housing by rotation of said member in one direction and is releasably locked to said plunger by rotation of said member in the opposite direction.

3. A device as claimed in claim 2 wherein means are provided on said housing whereby said plunger is releasably secured to said housing with said plunger in its innermost position in said housing.

References Cited in the file of this patent UNITED STATES PATENTS 604,250 Jocelyn May 17, 1898 814,020 Cliiford Mar. '6, 1906 2,632,489 Johnson Mar. 24, 1953 2,718,249 Hill Sept. 20, 1955 FOREIGN PATENTS H 203,754 Switzerland Aug. 1, 1939 602,517 Great Britain May 28, 1948 621,680 Germany Nov. 1 1, 1945

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